initial commit

Signed-off-by: Steve Markgraf <steve@steve-m.de>

7 files changed, 3329 insertions, 0 deletions

diff --git a/src/Makefile b/src/Makefile
new file mode 100644
index 0000000..0f08378
--- /dev/null
+++ b/src/Makefile
@@ -0,0 +1,10 @@
+LDFLAGS=`pkg-config --libs libusb-1.0`
+CFLAGS=-Wall -O2 `pkg-config --cflags libusb-1.0`
+
+all: rtl-sdr
+
+rtl-sdr: main.o tuner_e4000.o tuner_fc0013.c
+	$(CC) -o $@ $^ $(LDFLAGS)
+
+clean:
+	@rm -f rtl.sdr *.o
diff --git a/src/i2c.h b/src/i2c.h
new file mode 100644
index 0000000..31c21bb
--- /dev/null
+++ b/src/i2c.h
@@ -0,0 +1,7 @@
+#ifndef __I2C_H
+#define __I2C_H
+
+int rtl_i2c_write(uint8_t i2c_addr, uint8_t *buffer, int len);
+int rtl_i2c_read(uint8_t i2c_addr, uint8_t *buffer, int len);
+
+#endif
diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000..833d81f
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,415 @@
+/*
+ * rtl-sdr, a poor man's SDR using a Realtek RTL2832 based DVB-stick
+ * Copyright (C) 2012 by Steve Markgraf <steve@steve-m.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ *(at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <errno.h>
+#include <signal.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <libusb.h>
+
+#include "tuner_e4000.h"
+#include "tuner_fc0013.h"
+
+#define READLEN		(16 * 16384)
+#define CTRL_IN		(LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN)
+#define CTRL_OUT	(LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_OUT)
+
+/* ezcap USB 2.0 DVB-T/DAB/FM stick */
+#define EZCAP_VID	0x0bda
+#define EZCAP_PID	0x2838
+
+/* Terratec NOXON DAB/DAB+ USB-Stick */
+#define NOXON_VID	0x0ccd
+#define NOXON_PID	0x00b3
+
+static struct libusb_device_handle *devh = NULL;
+static int do_exit = 0;
+
+enum TUNER_TYPE {
+	TUNER_E4000,
+	TUNER_FC0013
+} tuner_type;
+
+static int find_device(void)
+{
+	devh = libusb_open_device_with_vid_pid(NULL, EZCAP_VID, EZCAP_PID);
+	if (devh > 0) {
+		tuner_type = TUNER_E4000;
+		printf("Found ezcap stick with E4000 tuner\n");
+		return 0;
+	}
+
+	devh = libusb_open_device_with_vid_pid(NULL, NOXON_VID, NOXON_PID);
+	if (devh > 0) {
+		tuner_type = TUNER_FC0013;
+		printf("Found Terratec NOXON stick with FC0013 tuner\n");
+		return 0;
+	}
+
+	return -EIO;
+}
+
+enum usb_reg {
+	USB_SYSCTL		= 0x2000,
+	USB_CTRL		= 0x2010,
+	USB_STAT		= 0x2014,
+	USB_EPA_CFG		= 0x2144,
+	USB_EPA_CTL		= 0x2148,
+	USB_EPA_MAXPKT		= 0x2158,
+	USB_EPA_MAXPKT_2	= 0x215a,
+	USB_EPA_FIFO_CFG	= 0x2160,
+};
+
+enum sys_reg {
+	DEMOD_CTL		= 0x3000,
+	GPO			= 0x3001,
+	GPI			= 0x3002,
+	GPOE			= 0x3003,
+	GPD			= 0x3004,
+	SYSINTE			= 0x3005,
+	SYSINTS			= 0x3006,
+	GP_CFG0			= 0x3007,
+	GP_CFG1			= 0x3008,
+	SYSINTE_1		= 0x3009,
+	SYSINTS_1		= 0x300a,
+	DEMOD_CTL_1		= 0x300b,
+	IR_SUSPEND		= 0x300c,
+};
+
+enum blocks {
+	DEMODB			= 0,
+	USBB			= 1,
+	SYSB			= 2,
+	TUNB			= 3,
+	ROMB			= 4,
+	IRB			= 5,
+	IICB			= 6,
+};
+
+int rtl_read_array(uint8_t block, uint16_t addr, uint8_t *array, uint8_t len)
+{
+	int r;
+	uint16_t index = (block << 8);
+
+	r = libusb_control_transfer(devh, CTRL_IN, 0, addr, index, array, len, 0);
+
+	return r;
+}
+
+int rtl_write_array(uint8_t block, uint16_t addr, uint8_t *array, uint8_t len)
+{
+	int r;
+	uint16_t index = (block << 8) | 0x10;
+
+	r = libusb_control_transfer(devh, CTRL_OUT, 0, addr, index, array, len, 0);
+
+	return r;
+}
+
+int rtl_i2c_write(uint8_t i2c_addr, uint8_t *buffer, int len)
+{
+	uint16_t addr = i2c_addr;
+	return rtl_write_array(IICB, addr, buffer, len);
+}
+
+int rtl_i2c_read(uint8_t i2c_addr, uint8_t *buffer, int len)
+{
+	uint16_t addr = i2c_addr;
+	return rtl_read_array(IICB, addr, buffer, len);
+}
+
+uint16_t rtl_read_reg(uint8_t block, uint16_t addr, uint8_t len)
+{
+	int r;
+	unsigned char data[2];
+	uint16_t index = (block << 8);
+	uint16_t reg;
+
+	r = libusb_control_transfer(devh, CTRL_IN, 0, addr, index, data, len, 0);
+
+	if (r < 0)
+		printf("%s failed\n", __FUNCTION__);
+
+	reg = (data[1] << 8) | data[0];
+
+	return reg;
+}
+
+void rtl_write_reg(uint8_t block, uint16_t addr, uint16_t val, uint8_t len)
+{
+	int r;
+	unsigned char data[2];
+
+	uint16_t index = (block << 8) | 0x10;
+
+	if (len == 1)
+		data[0] = val & 0xff;
+	else
+		data[0] = val >> 8;
+
+	data[1] = val & 0xff;
+
+	r = libusb_control_transfer(devh, CTRL_OUT, 0, addr, index, data, len, 0);
+
+	if (r < 0)
+		printf("%s failed\n", __FUNCTION__);
+}
+
+uint16_t demod_read_reg(uint8_t page, uint8_t addr, uint8_t len)
+{
+	int r;
+	unsigned char data[2];
+
+	uint16_t index = page;
+	uint16_t reg;
+	addr = (addr << 8) | 0x20;
+
+	r = libusb_control_transfer(devh, CTRL_IN, 0, addr, index, data, len, 0);
+
+	if (r < 0)
+		printf("%s failed\n", __FUNCTION__);
+
+	reg = (data[1] << 8) | data[0];
+
+	return reg;
+}
+
+void demod_write_reg(uint8_t page, uint16_t addr, uint16_t val, uint8_t len)
+{
+	int r;
+	unsigned char data[2];
+	uint16_t index = 0x10 | page;
+	addr = (addr << 8) | 0x20;
+
+	if (len == 1)
+		data[0] = val & 0xff;
+	else
+		data[0] = val >> 8;
+
+	data[1] = val & 0xff;
+
+	r = libusb_control_transfer(devh, CTRL_OUT, 0, addr, index, data, len, 0);
+
+	if (r < 0)
+		printf("%s failed\n", __FUNCTION__);
+
+	demod_read_reg(0x0a, 0x01, 1);
+}
+
+void set_resampler(uint32_t rsamp_ratio)
+{
+	uint16_t tmp;
+	rsamp_ratio <<= 2;
+
+	tmp = (rsamp_ratio >> 16) & 0xffff;
+	demod_write_reg(1, 0x9f, tmp, 2);
+	tmp = rsamp_ratio & 0xffff;
+	demod_write_reg(1, 0xa1, tmp, 2);
+}
+
+void set_i2c_repeater(int on)
+{
+	demod_write_reg(1, 0x01, on ? 0x18 : 0x10, 1);
+}
+
+void rtl_init(void)
+{
+	unsigned int i;
+
+	/* default FIR coefficients used for DAB/FM by the Windows driver,
+	 * the DVB driver uses different ones */
+	uint8_t fir_coeff[] = {
+		0xca, 0xdc, 0xd7, 0xd8, 0xe0, 0xf2, 0x0e, 0x35, 0x06, 0x50,
+		0x9c, 0x0d, 0x71, 0x11, 0x14, 0x71, 0x74, 0x19, 0x41, 0x00,
+	};
+
+	/* initialize USB */
+	rtl_write_reg(USBB, USB_SYSCTL, 0x09, 1);
+	rtl_write_reg(USBB, USB_EPA_MAXPKT, 0x0002, 2);
+	rtl_write_reg(USBB, USB_EPA_CTL, 0x1002, 2);
+
+	/* poweron demod */
+	rtl_write_reg(SYSB, DEMOD_CTL_1, 0x22, 1);
+	rtl_write_reg(SYSB, DEMOD_CTL, 0xe8, 1);
+
+	/* reset demod (bit 3, soft_rst) */
+	demod_write_reg(1, 0x01, 0x14, 1);
+	demod_write_reg(1, 0x01, 0x10, 1);
+
+	/* disable spectrum inversion and adjacent channel rejection */
+	demod_write_reg(1, 0x15, 0x00, 1);
+	demod_write_reg(1, 0x16, 0x0000, 2);
+
+	/* set IF-frequency to 0 Hz */
+	demod_write_reg(1, 0x19, 0x0000, 2);
+
+	/* set FIR coefficients */
+	for (i = 0; i < sizeof (fir_coeff); i++)
+		demod_write_reg(1, 0x1c + i, fir_coeff[i], 1);
+
+	/* TODO setting resampler test value, max value is 0xC99999,
+	 * value for DAB/FM is 0xE10000*/
+	set_resampler(1 << 24);
+
+	demod_write_reg(0, 0x19, 0x25, 1);
+
+	/* init FSM state-holding register */
+	demod_write_reg(1, 0x93, 0xf0, 1);
+
+	/* disable AGC (en_dagc, bit 0) */
+	demod_write_reg(1, 0x11, 0x00, 1);
+
+	/* disable PID filter (enable_PID = 0) */
+	demod_write_reg(0, 0x61, 0x60, 1);
+
+	/* opt_adc_iq = 0, default ADC_I/ADC_Q datapath */
+	demod_write_reg(0, 0x06, 0x80, 1);
+
+	/* Enable Zero-IF mode (en_bbin bit), DC cancellation (en_dc_est),
+	 * IQ estimation/compensation (en_iq_comp, en_iq_est) */
+	demod_write_reg(1, 0xb1, 0x1b, 1);
+}
+
+void tuner_init(int frequency)
+{
+	set_i2c_repeater(1);
+
+	switch (tuner_type) {
+	case TUNER_E4000:
+		e4000_Initialize(1);
+		e4000_SetBandwidthHz(1, 80000);
+		e4000_SetRfFreqHz(1, frequency);
+		break;
+	case TUNER_FC0013:
+		FC0013_Open();
+		FC0013_SetFrequency(frequency/1000, 8);
+		break;
+	default:
+		printf("No valid tuner available!");
+		break;
+	}
+
+	printf("Tuned to %i Hz\n", frequency);
+	set_i2c_repeater(0);
+}
+
+void usage(void)
+{
+	printf("rtl-sdr, an I/Q recorder for RTL2832 based USB-sticks\n\n"
+		"Usage:\t-f frequency to tune to [Hz]\n"
+		"\toutput filename\n");
+	exit(1);
+}
+
+static void sighandler(int signum)
+{
+	do_exit = 1;
+}
+
+int main(int argc, char **argv)
+{
+	struct sigaction sigact;
+	int r, opt;
+	char *filename;
+	unsigned int frequency = 0;
+	uint8_t buffer[READLEN];
+	int n_read;
+	FILE *file;
+
+	while ((opt = getopt(argc, argv, "f:")) != -1) {
+		switch (opt) {
+		case 'f':
+			frequency = atoi(optarg);
+			break;
+		default:
+			usage();
+			break;
+		}
+	}
+
+	if (argc <= optind) {
+		usage();
+	} else {
+		filename = argv[optind];
+	}
+
+	r = libusb_init(NULL);
+	if (r < 0) {
+		fprintf(stderr, "Failed to initialize libusb\n");
+		exit(1);
+	}
+
+	r = find_device();
+	if (r < 0) {
+		fprintf(stderr, "Could not find/open device\n");
+		goto out;
+	}
+
+	r = libusb_claim_interface(devh, 0);
+	if (r < 0) {
+		fprintf(stderr, "usb_claim_interface error %d\n", r);
+		goto out;
+	}
+
+	sigact.sa_handler = sighandler;
+	sigemptyset(&sigact.sa_mask);
+	sigact.sa_flags = 0;
+	sigaction(SIGINT, &sigact, NULL);
+	sigaction(SIGTERM, &sigact, NULL);
+	sigaction(SIGQUIT, &sigact, NULL);
+
+	/* Initialize the RTL2832 */
+	rtl_init();
+
+	/* Initialize tuner & set frequency */
+	tuner_init(frequency);
+
+	file = fopen(filename, "wb");
+
+	if (!file) {
+		printf("Failed to open %s\n", filename);
+		goto out;
+	}
+
+	/* reset endpoint before we start reading */
+	rtl_write_reg(USBB, USB_EPA_CTL, 0x1002, 2);
+	rtl_write_reg(USBB, USB_EPA_CTL, 0x0000, 2);
+
+	printf("Reading samples...\n");
+	while (!do_exit) {
+		libusb_bulk_transfer(devh, 0x81, buffer, READLEN, &n_read, 3000);
+		fwrite(buffer, n_read, 1, file);
+
+		if (n_read < READLEN) {
+			printf("Short bulk read, samples lost, exiting!\n");
+			break;
+		}
+	}
+
+	fclose(file);
+	libusb_release_interface(devh, 0);
+
+out:
+	libusb_close(devh);
+	libusb_exit(NULL);
+	return r >= 0 ? r : -r;
+}
+
diff --git a/src/tuner_e4000.c b/src/tuner_e4000.c
new file mode 100644
index 0000000..62888e6
--- /dev/null
+++ b/src/tuner_e4000.c
@@ -0,0 +1,2073 @@
+/*
+ * Elonics E4000 tuner driver, taken from the kernel driver that can be found
+ * on http://linux.terratec.de/tv_en.html
+ *
+ * This driver is a mess, and should be replaced by the osmo-sdr E4000 driver
+ *
+ */
+
+#include <stdint.h>
+
+#include "i2c.h"
+#include "tuner_e4000.h"
+
+#define FUNCTION_ERROR		1
+#define FUNCTION_SUCCESS	0
+#define NO_USE			0
+#define LEN_2_BYTE		2
+#define I2C_BUFFER_LEN		128
+#define YES			1
+#define NO			0
+
+#define CRYSTAL_FREQ		28800000
+#define E4K_I2C_ADDR		0xc8
+
+/* glue functions to rtl-sdr code */
+int
+I2CReadByte(
+	int pTuner,
+	unsigned char NoUse,
+	unsigned char RegAddr,
+	unsigned char *pReadingByte
+	)
+{
+	uint8_t data = RegAddr;
+
+	if (rtl_i2c_write(E4K_I2C_ADDR, &data, 1) < 0)
+		return E4000_I2C_FAIL;
+
+	if (rtl_i2c_read(E4K_I2C_ADDR, &data, 1) < 0)
+		return E4000_I2C_FAIL;
+
+	*pReadingByte = data;
+
+	return E4000_I2C_SUCCESS;
+}
+
+int
+I2CWriteByte(
+	int pTuner,
+	unsigned char NoUse,
+	unsigned char RegAddr,
+	unsigned char WritingByte
+	)
+{
+	uint8_t data[2];
+
+	data[0] = RegAddr;
+	data[1] = WritingByte;
+
+	if (rtl_i2c_write(E4K_I2C_ADDR, data, 2) < 0)
+		return E4000_I2C_FAIL;
+
+	return E4000_I2C_SUCCESS;
+}
+
+int
+I2CWriteArray(
+	int pTuner,
+	unsigned char NoUse,
+	unsigned char RegStartAddr,
+	unsigned char ByteNum,
+	unsigned char *pWritingBytes
+	)
+{
+	unsigned int i;
+	uint8_t WritingBuffer[I2C_BUFFER_LEN];
+
+	WritingBuffer[0] = RegStartAddr;
+
+	for(i = 0; i < ByteNum; i++)
+		WritingBuffer[1 + i] = pWritingBytes[i];
+
+	if (rtl_i2c_write(E4K_I2C_ADDR, WritingBuffer, ByteNum + 1) < 0)
+		return E4000_I2C_FAIL;
+
+	return E4000_I2C_SUCCESS;
+}
+
+/**
+
+@see   TUNER_FP_INITIALIZE
+
+*/
+int
+e4000_Initialize(
+	int pTuner
+	)
+{
+
+	// Initialize tuner.
+	// Note: Call E4000 source code functions.
+	if(tunerreset(pTuner) != E4000_1_SUCCESS)
+		goto error_status_execute_function;
+
+	if(Tunerclock(pTuner) != E4000_1_SUCCESS)
+		goto error_status_execute_function;
+
+	if(Qpeak(pTuner) != E4000_1_SUCCESS)
+		goto error_status_execute_function;
+
+	if(DCoffloop(pTuner) != E4000_1_SUCCESS)
+		goto error_status_execute_function;
+
+	if(GainControlinit(pTuner) != E4000_1_SUCCESS)
+		goto error_status_execute_function;
+
+
+	return FUNCTION_SUCCESS;
+
+
+error_status_execute_function:
+	return FUNCTION_ERROR;
+}
+
+/**
+
+@see   TUNER_FP_SET_RF_FREQ_HZ
+
+*/
+int
+e4000_SetRfFreqHz(
+	int pTuner,
+	unsigned long RfFreqHz
+	)
+{
+//	E4000_EXTRA_MODULE *pExtra;
+
+	int RfFreqKhz;
+	int CrystalFreqKhz;
+
+	int CrystalFreqHz = CRYSTAL_FREQ;
+
+	// Set tuner RF frequency in KHz.
+	// Note: 1. RfFreqKhz = round(RfFreqHz / 1000)
+	//          CrystalFreqKhz = round(CrystalFreqHz / 1000)
+	//       2. Call E4000 source code functions.
+	RfFreqKhz      = (int)((RfFreqHz + 500) / 1000);
+	CrystalFreqKhz = (int)((CrystalFreqHz + 500) / 1000);
+
+	if(Gainmanual(pTuner) != E4000_1_SUCCESS)
+		goto error_status_execute_function;
+
+	if(E4000_gain_freq(pTuner, RfFreqKhz) != E4000_1_SUCCESS)
+		goto error_status_execute_function;
+
+	if(PLL(pTuner, CrystalFreqKhz, RfFreqKhz) != E4000_1_SUCCESS)
+		goto error_status_execute_function;
+
+	if(LNAfilter(pTuner, RfFreqKhz) != E4000_1_SUCCESS)
+		goto error_status_execute_function;
+
+	if(freqband(pTuner, RfFreqKhz) != E4000_1_SUCCESS)
+		goto error_status_execute_function;
+
+	if(DCoffLUT(pTuner) != E4000_1_SUCCESS)
+		goto error_status_execute_function;
+
+	if(GainControlauto(pTuner) != E4000_1_SUCCESS)
+		goto error_status_execute_function;
+
+	return FUNCTION_SUCCESS;
+
+
+error_status_execute_function:
+	return FUNCTION_ERROR;
+}
+
+/**
+
+@brief   Set E4000 tuner bandwidth.
+
+*/
+int
+e4000_SetBandwidthHz(
+	int pTuner,
+	unsigned long BandwidthHz
+	)
+{
+//	E4000_EXTRA_MODULE *pExtra;
+
+	int BandwidthKhz;
+	int CrystalFreqKhz;
+
+	int CrystalFreqHz = CRYSTAL_FREQ;
+
+
+	// Get tuner extra module.
+//	pExtra = &(pTuner->Extra.E4000);
+
+
+	// Set tuner bandwidth Hz.
+	// Note: 1. BandwidthKhz = round(BandwidthHz / 1000)
+	//          CrystalFreqKhz = round(CrystalFreqHz / 1000)
+	//       2. Call E4000 source code functions.
+	BandwidthKhz   = (int)((BandwidthHz + 500) / 1000);
+	CrystalFreqKhz = (int)((CrystalFreqHz + 500) / 1000);
+
+	if(IFfilter(pTuner, BandwidthKhz, CrystalFreqKhz) != E4000_1_SUCCESS)
+		goto error_status_execute_function;
+
+
+	return FUNCTION_SUCCESS;
+
+error_status_execute_function:
+	return FUNCTION_ERROR;
+}
+
+
+// The following context is source code provided by Elonics.
+
+// Elonics source code - E4000_API_rev2_04_realtek.cpp
+
+
+//****************************************************************************/
+//
+//  Filename    E4000_initialisation.c
+//  Revision    2.04
+//
+// Description:
+//  Initialisation script for the Elonics E4000 revC tuner
+//
+//  Copyright (c)  Elonics Ltd
+//
+//    Any software supplied free of charge for use with elonics
+//    evaluation kits is supplied without warranty and for
+//    evaluation purposes only. Incorporation of any of this
+//    code into products for open sale is permitted but only at
+//    the user's own risk. Elonics accepts no liability for the
+//    integrity of this software whatsoever.
+//
+//
+//****************************************************************************/
+//#include <stdio.h>
+//#include <stdlib.h>
+//
+// User defined variable definitions
+//
+/*
+int Ref_clk = 26000;   // Reference clock frequency(kHz).
+int Freq = 590000; // RF Frequency (kHz)
+int bandwidth = 8000;  //RF channel bandwith (kHz)
+*/
+//
+// API defined variable definitions
+//int VCO_freq;
+//unsigned char writearray[5];
+//unsigned char read1[1];
+//int status;
+//
+//
+// function definitions
+//
+/*
+int tunerreset ();
+int Tunerclock();
+int filtercal();
+int Qpeak();
+int PLL(int Ref_clk, int Freq);
+int LNAfilter(int Freq);
+int IFfilter(int bandwidth, int Ref_clk);
+int freqband(int Freq);
+int DCoffLUT();
+int DCoffloop();
+int commonmode();
+int GainControlinit();
+*/
+//
+//****************************************************************************
+// --- Public functions ------------------------------------------------------
+/****************************************************************************\
+*  Function: tunerreset
+*
+*  Detailed Description:
+*  The function resets the E4000 tuner. (Register 0x00).
+*
+\****************************************************************************/
+
+int tunerreset(int pTuner)
+{
+	unsigned char writearray[5];
+	int status;
+
+	writearray[0] = 64;
+	// For dummy I2C command, don't check executing status.
+	status=I2CWriteByte (pTuner, 200,2,writearray[0]);
+	status=I2CWriteByte (pTuner, 200,2,writearray[0]);
+	//printf("\nRegister 0=%d", writearray[0]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	writearray[0] = 0;
+	status=I2CWriteByte (pTuner, 200,9,writearray[0]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	writearray[0] = 0;
+	status=I2CWriteByte (pTuner, 200,5,writearray[0]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	writearray[0] = 7;
+	status=I2CWriteByte (pTuner, 200,0,writearray[0]);
+	//printf("\nRegister 0=%d", writearray[0]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	return E4000_1_SUCCESS;
+}
+/****************************************************************************\
+*  Function: Tunerclock
+*
+*  Detailed Description:
+*  The function configures the E4000 clock. (Register 0x06, 0x7a).
+*  Function disables the clock - values can be modified to enable if required.
+\****************************************************************************/
+
+int Tunerclock(int pTuner)
+{
+	unsigned char writearray[5];
+	int status;
+
+	writearray[0] = 0;
+	status=I2CWriteByte(pTuner, 200,6,writearray[0]);
+	//printf("\nRegister 6=%d", writearray[0]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	writearray[0] = 150;
+	status=I2CWriteByte(pTuner, 200,122,writearray[0]);
+	//printf("\nRegister 7a=%d", writearray[0]);
+	//**Modify commands above with value required if output clock is required,
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	return E4000_1_SUCCESS;
+}
+/****************************************************************************\
+*  Function: filtercal
+*
+*  Detailed Description:
+*  Instructs RC filter calibration. (Register 0x7b).
+*
+\****************************************************************************/
+/*
+int filtercal(int pTuner)
+{
+  //writearray[0] = 1;
+ //I2CWriteByte (pTuner, 200,123,writearray[0]);
+ //printf("\nRegister 7b=%d", writearray[0]);
+  //return;
+   return E4000_1_SUCCESS;
+}
+*/
+/****************************************************************************\
+*  Function: Qpeak()
+*
+*  Detailed Description:
+*  The function configures the E4000 gains.
+*  Also sigma delta controller. (Register 0x82).
+*
+\****************************************************************************/
+
+int Qpeak(int pTuner)
+{
+	unsigned char writearray[5];
+	int status;
+
+	writearray[0] = 1;
+	writearray[1] = 254;
+	status=I2CWriteArray(pTuner, 200,126,2,writearray);
+	//printf("\nRegister 7e=%d", writearray[0]);
+	//printf("\nRegister 7f=%d", writearray[1]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	status=I2CWriteByte (pTuner, 200,130,0);
+	//printf("\nRegister 82=0");
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	status=I2CWriteByte (pTuner, 200,36,5);
+	//printf("\nRegister 24=5");
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	writearray[0] = 32;
+	writearray[1] = 1;
+	status=I2CWriteArray(pTuner, 200,135,2,writearray);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	//printf("\nRegister 87=%d", writearray[0]);
+	//printf("\nRegister 88=%d", writearray[1]);
+	return E4000_1_SUCCESS;
+}
+/****************************************************************************\
+*  Function: E4000_gain_freq()
+*
+*  Detailed Description:
+*  The function configures the E4000 gains vs. freq
+*  0xa3 to 0xa7. Also 0x24.
+*
+\****************************************************************************/
+int E4000_gain_freq(int pTuner, int Freq)
+{
+	unsigned char writearray[5];
+	int status;
+
+	if (Freq<=350000)
+	{
+		writearray[0] = 0x10;
+		writearray[1] = 0x42;
+		writearray[2] = 0x09;
+		writearray[3] = 0x21;
+		writearray[4] = 0x94;
+	}
+	else if(Freq>=1000000)
+	{
+		writearray[0] = 0x10;
+		writearray[1] = 0x42;
+		writearray[2] = 0x09;
+		writearray[3] = 0x21;
+		writearray[4] = 0x94;
+	}
+	else
+	{
+		writearray[0] = 0x10;
+		writearray[1] = 0x42;
+		writearray[2] = 0x09;
+		writearray[3] = 0x21;
+		writearray[4] = 0x94;
+	}
+	status=I2CWriteArray(pTuner, 200,163,5,writearray);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	if (Freq<=350000)
+	{
+		writearray[0] = 94;
+		writearray[1] = 6;
+		status=I2CWriteArray(pTuner, 200,159,2,writearray);
+		if(status != E4000_I2C_SUCCESS)
+		{
+			return E4000_1_FAIL;
+		}
+
+		writearray[0] = 0;
+		status=I2CWriteArray(pTuner, 200,136,1,writearray);
+		if(status != E4000_I2C_SUCCESS)
+		{
+			return E4000_1_FAIL;
+		}
+	}
+	else
+	{
+		writearray[0] = 127;
+		writearray[1] = 7;
+		status=I2CWriteArray(pTuner, 200,159,2,writearray);
+		if(status != E4000_I2C_SUCCESS)
+		{
+			return E4000_1_FAIL;
+		}
+
+		writearray[0] = 1;
+		status=I2CWriteArray(pTuner, 200,136,1,writearray);
+		if(status != E4000_I2C_SUCCESS)
+		{
+			return E4000_1_FAIL;
+		}
+	}
+
+	//printf("\nRegister 9f=%d", writearray[0]);
+	//printf("\nRegister a0=%d", writearray[1]);
+	return E4000_1_SUCCESS;
+}
+/****************************************************************************\
+*  Function: DCoffloop
+*
+*  Detailed Description:
+*  Populates DC offset LUT. (Registers 0x2d, 0x70, 0x71).
+*  Turns on DC offset LUT and time varying DC offset.
+\****************************************************************************/
+int DCoffloop(int pTuner)
+{
+	unsigned char writearray[5];
+	int status;
+
+	//writearray[0]=0;
+	//I2CWriteByte(pTuner, 200,115,writearray[0]);
+	//printf("\nRegister 73=%d", writearray[0]);
+	writearray[0] = 31;
+	status=I2CWriteByte(pTuner, 200,45,writearray[0]);
+	//printf("\nRegister 2d=%d", writearray[0]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	writearray[0] = 1;
+	writearray[1] = 1;
+	status=I2CWriteArray(pTuner, 200,112,2,writearray);
+	//printf("\nRegister 70=%d", writearray[0]);
+	//printf("\nRegister 71=%d", writearray[0]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	return E4000_1_SUCCESS;
+}
+/****************************************************************************\
+*  Function: commonmode
+*
+*  Detailed Description:
+*  Configures common mode voltage. (Registers 0x2f).
+*
+\****************************************************************************/
+/*
+int commonmode(int pTuner)
+{
+     //writearray[0] = 0;
+     //I2CWriteByte(Device_address,47,writearray[0]);
+     //printf("\nRegister 0x2fh = %d", writearray[0]);
+     // Sets 550mV. Modify if alternative is desired.
+     return E4000_1_SUCCESS;
+}
+*/
+/****************************************************************************\
+*  Function: GainControlinit
+*
+*  Detailed Description:
+*  Configures gain control mode. (Registers 0x1d, 0x1e, 0x1f, 0x20, 0x21,
+*  0x1a, 0x74h, 0x75h).
+*  User may wish to modify values depending on usage scenario.
+*  Routine configures LNA: autonomous gain control
+*  IF PWM gain control.
+*  PWM thresholds = default
+*  Mixer: switches when LNA gain =7.5dB
+*  Sensitivity / Linearity mode: manual switch
+*
+\****************************************************************************/
+int GainControlinit(int pTuner)
+{
+	unsigned char writearray[5];
+	unsigned char read1[1];
+	int status;
+
+	unsigned char sum=255;
+
+	writearray[0] = 23;
+	status=I2CWriteByte(pTuner, 200,26,writearray[0]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+	//printf("\nRegister 1a=%d", writearray[0]);
+
+	status=I2CReadByte(pTuner, 201,27,read1);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	writearray[0] = 16;
+	writearray[1] = 4;
+	writearray[2] = 26;
+	writearray[3] = 15;
+	writearray[4] = 167;
+	status=I2CWriteArray(pTuner, 200,29,5,writearray);
+	//printf("\nRegister 1d=%d", writearray[0]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	writearray[0] = 81;
+	status=I2CWriteByte(pTuner, 200,134,writearray[0]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+	//printf("\nRegister 86=%d", writearray[0]);
+
+	//For Realtek - gain control logic
+	status=I2CReadByte(pTuner, 201,27,read1);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	if(read1[0]<=sum)
+	{
+		sum=read1[0];
+	}
+
+	status=I2CWriteByte(pTuner, 200,31,writearray[2]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+	status=I2CReadByte(pTuner, 201,27,read1);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	if(read1[0] <= sum)
+	{
+		sum=read1[0];
+	}
+
+	status=I2CWriteByte(pTuner, 200,31,writearray[2]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	status=I2CReadByte(pTuner, 201,27,read1);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	if(read1[0] <= sum)
+	{
+		sum=read1[0];
+	}
+
+	status=I2CWriteByte(pTuner, 200,31,writearray[2]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	status=I2CReadByte(pTuner, 201,27,read1);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	if(read1[0] <= sum)
+	{
+		sum=read1[0];
+	}
+
+	status=I2CWriteByte(pTuner, 200,31,writearray[2]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	status=I2CReadByte(pTuner, 201,27,read1);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	if (read1[0]<=sum)
+	{
+		sum=read1[0];
+	}
+
+	writearray[0]=sum;
+	status=I2CWriteByte(pTuner, 200,27,writearray[0]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+	//printf("\nRegister 1b=%d", writearray[0]);
+	//printf("\nRegister 1e=%d", writearray[1]);
+	//printf("\nRegister 1f=%d", writearray[2]);
+	//printf("\nRegister 20=%d", writearray[3]);
+	//printf("\nRegister 21=%d", writearray[4]);
+	//writearray[0] = 3;
+	//writearray[1] = 252;
+	//writearray[2] = 3;
+	//writearray[3] = 252;
+	//I2CWriteArray(pTuner, 200,116,4,writearray);
+	//printf("\nRegister 74=%d", writearray[0]);
+	//printf("\nRegister 75=%d", writearray[1]);
+	//printf("\nRegister 76=%d", writearray[2]);
+	//printf("\nRegister 77=%d", writearray[3]);
+
+	return E4000_1_SUCCESS;
+}
+
+/****************************************************************************\
+*  Main program
+*
+*
+*
+\****************************************************************************/
+/*
+int main()
+{
+     tunerreset ();
+     Tunerclock();
+     //filtercal();
+     Qpeak();
+     //PLL(Ref_clk, Freq);
+     //LNAfilter(Freq);
+     //IFfilter(bandwidth, Ref_clk);
+     //freqband(Freq);
+     //DCoffLUT();
+     DCoffloop();
+     //commonmode();
+     GainControlinit();
+//     system("PAUSE");
+  return(0);
+}
+*/
+
+
+// Elonics source code - frequency_change_rev2.04_realtek.c
+
+
+//****************************************************************************/
+//
+//  Filename    E4000_freqchangerev2.04.c
+//  Revision    2.04
+//
+// Description:
+//  Frequency change script for the Elonics E4000 revB tuner
+//
+//  Copyright (c)  Elonics Ltd
+//
+//    Any software supplied free of charge for use with elonics
+//    evaluation kits is supplied without warranty and for
+//    evaluation purposes only. Incorporation of any of this
+//    code into products for open sale is permitted but only at
+//    the user's own risk. Elonics accepts no liability for the
+//    integrity of this software whatsoever.
+//
+//
+//****************************************************************************/
+//#include <stdio.h>
+//#include <stdlib.h>
+//
+// User defined variable definitions
+//
+/*
+int Ref_clk = 20000;   // Reference clock frequency(kHz).
+int Freq = 590000; // RF Frequency (kHz)
+int bandwidth = 8;  //RF channel bandwith (MHz)
+*/
+//
+// API defined variable definitions
+//int VCO_freq;
+//unsigned char writearray[5];
+//unsigned char read1[1];
+//int E4000_1_SUCCESS;
+//int E4000_1_FAIL;
+//int E4000_I2C_SUCCESS;
+//int status;
+//
+//
+// function definitions
+//
+/*
+int Gainmanual();
+int PLL(int Ref_clk, int Freq);
+int LNAfilter(int Freq);
+int IFfilter(int bandwidth, int Ref_clk);
+int freqband(int Freq);
+int DCoffLUT();
+int GainControlauto();
+*/
+//
+//****************************************************************************
+// --- Public functions ------------------------------------------------------
+/****************************************************************************\
+//****************************************************************************\
+*  Function: Gainmanual
+*
+*  Detailed Description:
+*  Sets Gain control to serial interface control.
+*
+\****************************************************************************/
+int Gainmanual(int pTuner)
+{
+	unsigned char writearray[5];
+	int status;
+
+	writearray[0]=0;
+	status=I2CWriteByte(pTuner, 200,26,writearray[0]);
+	//printf("\nRegister 1a=%d", writearray[0]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	writearray[0] = 0;
+	status=I2CWriteByte (pTuner, 200,9,writearray[0]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	writearray[0] = 0;
+	status=I2CWriteByte (pTuner, 200,5,writearray[0]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	return E4000_1_SUCCESS;
+}
+
+/****************************************************************************\
+*  Function: PLL
+*
+*  Detailed Description:
+*  Configures E4000 PLL divider & sigma delta. 0x0d,0x09, 0x0a, 0x0b).
+*
+\****************************************************************************/
+int PLL(int pTuner, int Ref_clk, int Freq)
+{
+	int VCO_freq;
+	unsigned char writearray[5];
+	int status;
+
+	unsigned char divider;
+	int intVCOfreq;
+	int SigDel;
+	int SigDel2;
+	int SigDel3;
+//	int harmonic_freq;
+//	int offset;
+
+	if (Freq<=72400)
+	{
+		writearray[4] = 15;
+		VCO_freq=Freq*48;
+	}
+	else if (Freq<=81200)
+    {
+		writearray[4] = 14;
+		VCO_freq=Freq*40;
+	}
+	else if (Freq<=108300)
+	{
+		writearray[4]=13;
+		VCO_freq=Freq*32;
+	}
+	else if (Freq<=162500)
+	{
+		writearray[4]=12;
+		VCO_freq=Freq*24;
+	}
+	else if (Freq<=216600)
+	{
+		writearray[4]=11;
+		VCO_freq=Freq*16;
+	}
+	else if (Freq<=325000)
+	{
+		writearray[4]=10;
+		VCO_freq=Freq*12;
+	}
+	else if (Freq<=350000)
+	{
+		writearray[4]=9;
+		VCO_freq=Freq*8;
+	}
+	else if (Freq<=432000)
+	{
+		writearray[4]=3;
+		VCO_freq=Freq*8;
+	}
+	else if (Freq<=667000)
+	{
+		writearray[4]=2;
+		VCO_freq=Freq*6;
+	}
+	else if (Freq<=1200000)
+	{
+		writearray[4]=1;
+		VCO_freq=Freq*4;
+	}
+	else
+	{
+		writearray[4]=0;
+		VCO_freq=Freq*2;
+	}
+
+	//printf("\nVCOfreq=%d", VCO_freq);
+//	divider =  VCO_freq * 1000 / Ref_clk;
+	divider =  VCO_freq / Ref_clk;
+	//printf("\ndivider=%d", divider);
+	writearray[0]= divider;
+//	intVCOfreq = divider * Ref_clk /1000;
+	intVCOfreq = divider * Ref_clk;
+	//printf("\ninteger VCO freq=%d", intVCOfreq);
+//	SigDel=65536 * 1000 * (VCO_freq - intVCOfreq) / Ref_clk;
+	SigDel=65536 * (VCO_freq - intVCOfreq) / Ref_clk;
+	//printf("\nSigma delta=%d", SigDel);
+	if (SigDel<=1024)
+	{
+		SigDel = 1024;
+	}
+	else if (SigDel>=64512)
+	{
+		SigDel=64512;
+	}
+	SigDel2 = SigDel / 256;
+	//printf("\nSigdel2=%d", SigDel2);
+	writearray[2] = (unsigned char)SigDel2;
+	SigDel3 = SigDel - (256 * SigDel2);
+	//printf("\nSig del3=%d", SigDel3);
+	writearray[1]= (unsigned char)SigDel3;
+	writearray[3]=(unsigned char)0;
+	status=I2CWriteArray(pTuner, 200,9,5,writearray);
+	//printf("\nRegister 9=%d", writearray[0]);
+	//printf("\nRegister a=%d", writearray[1]);
+	//printf("\nRegister b=%d", writearray[2]);
+	//printf("\nRegister d=%d", writearray[4]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	if (Freq<=82900)
+	{
+		writearray[0]=0;
+		writearray[2]=1;
+	}
+	else if (Freq<=89900)
+	{
+		writearray[0]=3;
+		writearray[2]=9;
+	}
+	else if (Freq<=111700)
+	{
+		writearray[0]=0;
+		writearray[2]=1;
+	}
+	else if (Freq<=118700)
+	{
+		writearray[0]=3;
+		writearray[2]=1;
+	}
+	else if (Freq<=140500)
+	{
+		writearray[0]=0;
+		writearray[2]=3;
+	}
+	else if (Freq<=147500)
+	{
+		writearray[0]=3;
+		writearray[2]=11;
+	}
+	else if (Freq<=169300)
+	{
+		writearray[0]=0;
+		writearray[2]=3;
+	}
+	else if (Freq<=176300)
+	{
+		writearray[0]=3;
+		writearray[2]=11;
+	}
+	else if (Freq<=198100)
+	{
+		writearray[0]=0;
+		writearray[2]=3;
+	}
+	else if (Freq<=205100)
+	{
+		writearray[0]=3;
+		writearray[2]=19;
+	}
+	else if (Freq<=226900)
+	{
+		writearray[0]=0;
+		writearray[2]=3;
+	}
+	else if (Freq<=233900)
+	{
+		writearray[0]=3;
+		writearray[2]=3;
+	}
+	else if (Freq<=350000)
+	{
+		writearray[0]=0;
+		writearray[2]=3;
+	}
+	else if (Freq<=485600)
+	{
+		writearray[0]=0;
+		writearray[2]=5;
+	}
+	else if (Freq<=493600)
+	{
+		writearray[0]=3;
+		writearray[2]=5;
+	}
+	else if (Freq<=514400)
+	{
+		writearray[0]=0;
+		writearray[2]=5;
+	}
+	else if (Freq<=522400)
+	{
+		writearray[0]=3;
+		writearray[2]=5;
+	}
+	else if (Freq<=543200)
+	{
+		writearray[0]=0;
+		writearray[2]=5;
+	}
+	else if (Freq<=551200)
+	{
+		writearray[0]=3;
+		writearray[2]=13;
+	}
+	else if (Freq<=572000)
+	{
+		writearray[0]=0;
+		writearray[2]=5;
+	}
+	else if (Freq<=580000)
+	{
+		writearray[0]=3;
+		writearray[2]=13;
+	}
+	else if (Freq<=600800)
+	{
+		writearray[0]=0;
+		writearray[2]=5;
+	}
+	else if (Freq<=608800)
+	{
+		writearray[0]=3;
+		writearray[2]=13;
+	}
+	else if (Freq<=629600)
+	{
+		writearray[0]=0;
+		writearray[2]=5;
+	}
+	else if (Freq<=637600)
+	{
+		writearray[0]=3;
+		writearray[2]=13;
+	}
+	else if (Freq<=658400)
+	{
+		writearray[0]=0;
+		writearray[2]=5;
+	}
+	else if (Freq<=666400)
+	{
+		writearray[0]=3;
+		writearray[2]=13;
+	}
+	else if (Freq<=687200)
+	{
+		writearray[0]=0;
+		writearray[2]=5;
+	}
+	else if (Freq<=695200)
+	{
+		writearray[0]=3;
+		writearray[2]=13;
+	}
+	else if (Freq<=716000)
+	{
+		writearray[0]=0;
+		writearray[2]=5;
+	}
+	else if (Freq<=724000)
+	{
+		writearray[0]=3;
+		writearray[2]=13;
+	}
+	else if (Freq<=744800)
+	{
+		writearray[0]=0;
+		writearray[2]=5;
+	}
+	else if (Freq<=752800)
+	{
+		writearray[0]=3;
+		writearray[2]=21;
+	}
+	else if (Freq<=773600)
+	{
+		writearray[0]=0;
+		writearray[2]=5;
+	}
+	else if (Freq<=781600)
+	{
+		writearray[0]=3;
+		writearray[2]=21;
+	}
+	else if (Freq<=802400)
+	{
+		writearray[0]=0;
+		writearray[2]=5;
+	}
+	else if (Freq<=810400)
+	{
+		writearray[0]=3;
+		writearray[2]=21;
+	}
+	else if (Freq<=831200)
+	{
+		writearray[0]=0;
+		writearray[2]=5;
+	}
+	else if (Freq<=839200)
+	{
+		writearray[0]=3;
+		writearray[2]=21;
+	}
+	else if (Freq<=860000)
+	{
+		writearray[0]=0;
+		writearray[2]=5;
+	}
+	else if (Freq<=868000)
+	{
+		writearray[0]=3;
+		writearray[2]=21;
+	}
+	else
+	{
+		writearray[0]=0;
+		writearray[2]=7;
+	}
+
+	status=I2CWriteByte (pTuner, 200,7,writearray[2]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	status=I2CWriteByte (pTuner, 200,5,writearray[0]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	return E4000_1_SUCCESS;
+}
+
+/****************************************************************************\
+*  Function: LNAfilter
+*
+*  Detailed Description:
+*  The function configures the E4000 LNA filter. (Register 0x10).
+*
+\****************************************************************************/
+
+int LNAfilter(int pTuner, int Freq)
+{
+	unsigned char writearray[5];
+	int status;
+
+	if(Freq<=370000)
+	{
+		writearray[0]=0;
+	}
+	else if(Freq<=392500)
+	{
+		writearray[0]=1;
+	}
+	else if(Freq<=415000)
+	{
+		writearray[0] =2;
+	}
+	else if(Freq<=437500)
+	{
+		writearray[0]=3;
+	}
+	else if(Freq<=462500)
+	{
+		writearray[0]=4;
+	}
+	else if(Freq<=490000)
+	{
+		writearray[0]=5;
+	}
+	else if(Freq<=522500)
+	{
+		writearray[0]=6;
+	}
+	else if(Freq<=557500)
+	{
+		writearray[0]=7;
+	}
+	else if(Freq<=595000)
+	{
+		writearray[0]=8;
+	}
+	else if(Freq<=642500)
+	{
+		writearray[0]=9;
+	}
+	else if(Freq<=695000)
+	{
+		writearray[0]=10;
+	}
+	else if(Freq<=740000)
+	{
+		writearray[0]=11;
+	}
+	else if(Freq<=800000)
+	{
+		writearray[0]=12;
+	}
+	else if(Freq<=865000)
+	{
+		writearray[0] =13;
+	}
+	else if(Freq<=930000)
+	{
+		writearray[0]=14;
+	}
+	else if(Freq<=1000000)
+	{
+		writearray[0]=15;
+	}
+	else if(Freq<=1310000)
+	{
+		writearray[0]=0;
+	}
+	else if(Freq<=1340000)
+	{
+		writearray[0]=1;
+	}
+	else if(Freq<=1385000)
+	{
+		writearray[0]=2;
+	}
+	else if(Freq<=1427500)
+	{
+		writearray[0]=3;
+	}
+	else if(Freq<=1452500)
+	{
+		writearray[0]=4;
+	}
+	else if(Freq<=1475000)
+	{
+		writearray[0]=5;
+	}
+	else if(Freq<=1510000)
+	{
+		writearray[0]=6;
+	}
+	else if(Freq<=1545000)
+	{
+		writearray[0]=7;
+	}
+	else if(Freq<=1575000)
+	{
+		writearray[0] =8;
+	}
+	else if(Freq<=1615000)
+	{
+		writearray[0]=9;
+	}
+	else if(Freq<=1650000)
+	{
+		writearray[0] =10;
+	}
+	else if(Freq<=1670000)
+	{
+		writearray[0]=11;
+	}
+	else if(Freq<=1690000)
+	{
+		writearray[0]=12;
+	}
+	else if(Freq<=1710000)
+	{
+		writearray[0]=13;
+	}
+	else if(Freq<=1735000)
+	{
+		writearray[0]=14;
+	}
+	else
+	{
+		writearray[0]=15;
+	}
+	status=I2CWriteByte (pTuner, 200,16,writearray[0]);
+	//printf("\nRegister 10=%d", writearray[0]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	return E4000_1_SUCCESS;
+}
+/****************************************************************************\
+*  Function: IFfilter
+*
+*  Detailed Description:
+*  The function configures the E4000 IF filter. (Register 0x11,0x12).
+*
+\****************************************************************************/
+int IFfilter(int pTuner, int bandwidth, int Ref_clk)
+{
+	unsigned char writearray[5];
+	int status;
+
+	int IF_BW;
+
+	IF_BW = bandwidth / 2;
+	if(IF_BW<=2150)
+	{
+		writearray[0]=253;
+		writearray[1]=31;
+	}
+	else if(IF_BW<=2200)
+	{
+		writearray[0]=253;
+		writearray[1]=30;
+	}
+	else if(IF_BW<=2240)
+	{
+		writearray[0]=252;
+		writearray[1]=29;
+	}
+	else if(IF_BW<=2280)
+	{
+		writearray[0]=252;
+		writearray[1]=28;
+	}
+	else if(IF_BW<=2300)
+	{
+		writearray[0]=252;
+		writearray[1]=27;
+	}
+	else if(IF_BW<=2400)
+	{
+		writearray[0]=252;
+		writearray[1]=26;
+	}
+	else if(IF_BW<=2450)
+	{
+		writearray[0]=252;
+		writearray[1]=25;
+	}
+	else if(IF_BW<=2500)
+	{
+		writearray[0]=252;
+		writearray[1]=24;
+	}
+	else if(IF_BW<=2550)
+	{
+		writearray[0]=252;
+		writearray[1]=23;
+	}
+	else if(IF_BW<=2600)
+	{
+		writearray[0]=252;
+		writearray[1]=22;
+	}
+	else if(IF_BW<=2700)
+	{
+		writearray[0]=252;
+		writearray[1]=21;
+	}
+	else if(IF_BW<=2750)
+	{
+		writearray[0]=252;
+		writearray[1]=20;
+	}
+	else if(IF_BW<=2800)
+	{
+		writearray[0]=252;
+		writearray[1]=19;
+	}
+	else if(IF_BW<=2900)
+	{
+		writearray[0]=251;
+		writearray[1]=18;
+	}
+	else if(IF_BW<=2950)
+	{
+		writearray[0]=251;
+		writearray[1]=17;
+	}
+	else if(IF_BW<=3000)
+	{
+		writearray[0]=251;
+		writearray[1]=16;
+	}
+	else if(IF_BW<=3100)
+	{
+		writearray[0]=251;
+		writearray[1]=15;
+	}
+	else if(IF_BW<=3200)
+	{
+		writearray[0]=250;
+		writearray[1]=14;
+	}
+	else if(IF_BW<=3300)
+	{
+		writearray[0]=250;
+		writearray[1]=13;
+	}
+	else if(IF_BW<=3400)
+	{
+		writearray[0]=249;
+		writearray[1]=12;
+	}
+	else if(IF_BW<=3600)
+	{
+		writearray[0]=249;
+		writearray[1]=11;
+	}
+	else if(IF_BW<=3700)
+	{
+		writearray[0]=249;
+		writearray[1]=10;
+	}
+	else if(IF_BW<=3800)
+	{
+		writearray[0]=248;
+		writearray[1]=9;
+	}
+	else if(IF_BW<=3900)
+	{
+		writearray[0]=248;
+		writearray[1]=8;
+	}
+	else if(IF_BW<=4100)
+	{
+		writearray[0]=248;
+		writearray[1]=7;
+	}
+	else if(IF_BW<=4300)
+	{
+		writearray[0]=247;
+		writearray[1]=6;
+	}
+	else if(IF_BW<=4400)
+	{
+		writearray[0]=247;
+		writearray[1]=5;
+	}
+	else if(IF_BW<=4600)
+	{
+		writearray[0]=247;
+		writearray[1]=4;
+	}
+	else if(IF_BW<=4800)
+	{
+		writearray[0]=246;
+		writearray[1]=3;
+	}
+	else if(IF_BW<=5000)
+	{
+		writearray[0]=246;
+		writearray[1]=2;
+	}
+	else if(IF_BW<=5300)
+	{
+		writearray[0]=245;
+		writearray[1]=1;
+	}
+	else if(IF_BW<=5500)
+	{
+		writearray[0]=245;
+		writearray[1]=0;
+	}
+	else
+	{
+		writearray[0]=0;
+		writearray[1]=32;
+	}
+	status=I2CWriteArray(pTuner, 200,17,2,writearray);
+	//printf("\nRegister 11=%d", writearray[0]);
+	//printf("\nRegister 12=%d", writearray[1]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	return E4000_1_SUCCESS;
+}
+/****************************************************************************\
+*  Function: freqband
+*
+*  Detailed Description:
+*  Configures the E4000 frequency band. (Registers 0x07, 0x78).
+*
+\****************************************************************************/
+int freqband(int pTuner, int Freq)
+{
+	unsigned char writearray[5];
+	int status;
+
+	if (Freq<=140000)
+	{
+		writearray[0] = 3;
+		status=I2CWriteByte(pTuner, 200,120,writearray[0]);
+		if(status != E4000_I2C_SUCCESS)
+		{
+			return E4000_1_FAIL;
+		}
+	}
+	else if (Freq<=350000)
+	{
+		writearray[0] = 3;
+		status=I2CWriteByte(pTuner, 200,120,writearray[0]);
+		if(status != E4000_I2C_SUCCESS)
+		{
+			return E4000_1_FAIL;
+		}
+	}
+	else if (Freq<=1000000)
+	{
+		writearray[0] = 3;
+		status=I2CWriteByte(pTuner, 200,120,writearray[0]);
+		if(status != E4000_I2C_SUCCESS)
+		{
+			return E4000_1_FAIL;
+		}
+	}
+	else
+	{
+		writearray[0] = 7;
+		status=I2CWriteByte(pTuner, 200,7,writearray[0]);
+		if(status != E4000_I2C_SUCCESS)
+		{
+			return E4000_1_FAIL;
+		}
+
+		writearray[0] = 0;
+		status=I2CWriteByte(pTuner, 200,120,writearray[0]);
+		if(status != E4000_I2C_SUCCESS)
+		{
+			return E4000_1_FAIL;
+		}
+	}
+
+	return E4000_1_SUCCESS;
+}
+/****************************************************************************\
+*  Function: DCoffLUT
+*
+*  Detailed Description:
+*  Populates DC offset LUT. (Registers 0x50 - 0x53, 0x60 - 0x63).
+*
+\****************************************************************************/
+int DCoffLUT(int pTuner)
+{
+	unsigned char writearray[5];
+	int status;
+
+	unsigned char read1[1];
+	unsigned char IOFF;
+	unsigned char QOFF;
+	unsigned char RANGE1;
+//	unsigned char RANGE2;
+	unsigned char QRANGE;
+	unsigned char IRANGE;
+	writearray[0] = 0;
+	writearray[1] = 126;
+	writearray[2] = 36;
+	status=I2CWriteArray(pTuner, 200,21,3,writearray);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	// Sets mixer & IF stage 1 gain = 00 and IF stg 2+ to max gain.
+	writearray[0] = 1;
+	status=I2CWriteByte(pTuner, 200,41,writearray[0]);
+	// Instructs a DC offset calibration.
+	status=I2CReadByte(pTuner, 201,42,read1);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	IOFF=read1[0];
+	status=I2CReadByte(pTuner, 201,43,read1);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	QOFF=read1[0];
+	status=I2CReadByte(pTuner, 201,44,read1);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	RANGE1=read1[0];
+	//reads DC offset values back
+	if(RANGE1>=32)
+	{
+		RANGE1 = RANGE1 -32;
+	}
+	if(RANGE1>=16)
+	{
+		RANGE1 = RANGE1 - 16;
+	}
+	IRANGE=RANGE1;
+	QRANGE = (read1[0] - RANGE1) / 16;
+
+	writearray[0] = (IRANGE * 64) + IOFF;
+	status=I2CWriteByte(pTuner, 200,96,writearray[0]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	writearray[0] = (QRANGE * 64) + QOFF;
+	status=I2CWriteByte(pTuner, 200,80,writearray[0]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	// Populate DC offset LUT
+	writearray[0] = 0;
+	writearray[1] = 127;
+	status=I2CWriteArray(pTuner, 200,21,2,writearray);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	// Sets mixer & IF stage 1 gain = 01 leaving IF stg 2+ at max gain.
+	writearray[0]= 1;
+	status=I2CWriteByte(pTuner, 200,41,writearray[0]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	// Instructs a DC offset calibration.
+	status=I2CReadByte(pTuner, 201,42,read1);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	IOFF=read1[0];
+	status=I2CReadByte(pTuner, 201,43,read1);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	QOFF=read1[0];
+	status=I2CReadByte(pTuner, 201,44,read1);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	RANGE1=read1[0];
+	// Read DC offset values
+	if(RANGE1>=32)
+	{
+		RANGE1 = RANGE1 -32;
+	}
+	if(RANGE1>=16)
+    {
+		RANGE1 = RANGE1 - 16;
+	}
+	IRANGE = RANGE1;
+	QRANGE = (read1[0] - RANGE1) / 16;
+
+	writearray[0] = (IRANGE * 64) + IOFF;
+	status=I2CWriteByte(pTuner, 200,97,writearray[0]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	writearray[0] = (QRANGE * 64) + QOFF;
+	status=I2CWriteByte(pTuner, 200,81,writearray[0]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	// Populate DC offset LUT
+	writearray[0] = 1;
+	status=I2CWriteByte(pTuner, 200,21,writearray[0]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	// Sets mixer & IF stage 1 gain = 11 leaving IF stg 2+ at max gain.
+	writearray[0] = 1;
+	status=I2CWriteByte(pTuner, 200,41,writearray[0]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	// Instructs a DC offset calibration.
+	status=I2CReadByte(pTuner, 201,42,read1);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	IOFF=read1[0];
+	status=I2CReadByte(pTuner, 201,43,read1);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	QOFF=read1[0];
+	status=I2CReadByte(pTuner, 201,44,read1);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	RANGE1 = read1[0];
+	// Read DC offset values
+	if(RANGE1>=32)
+	{
+		RANGE1 = RANGE1 -32;
+	}
+	if(RANGE1>=16)
+	{
+		RANGE1 = RANGE1 - 16;
+	}
+	IRANGE = RANGE1;
+	QRANGE = (read1[0] - RANGE1) / 16;
+	writearray[0] = (IRANGE * 64) + IOFF;
+	status=I2CWriteByte(pTuner, 200,99,writearray[0]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	writearray[0] = (QRANGE * 64) + QOFF;
+	status=I2CWriteByte(pTuner, 200,83,writearray[0]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	// Populate DC offset LUT
+	writearray[0] = 126;
+	status=I2CWriteByte(pTuner, 200,22,writearray[0]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	// Sets mixer & IF stage 1 gain = 11 leaving IF stg 2+ at max gain.
+	writearray[0] = 1;
+	status=I2CWriteByte(pTuner, 200,41,writearray[0]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	// Instructs a DC offset calibration.
+	status=I2CReadByte(pTuner, 201,42,read1);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+	IOFF=read1[0];
+
+	status=I2CReadByte(pTuner, 201,43,read1);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+	QOFF=read1[0];
+
+	status=I2CReadByte(pTuner, 201,44,read1);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+	RANGE1=read1[0];
+
+	// Read DC offset values
+	if(RANGE1>=32)
+	{
+		RANGE1 = RANGE1 -32;
+	}
+	if(RANGE1>=16)
+	{
+		RANGE1 = RANGE1 - 16;
+	}
+	IRANGE = RANGE1;
+	QRANGE = (read1[0] - RANGE1) / 16;
+
+	writearray[0]=(IRANGE * 64) + IOFF;
+	status=I2CWriteByte(pTuner, 200,98,writearray[0]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	writearray[0] = (QRANGE * 64) + QOFF;
+	status=I2CWriteByte(pTuner, 200,82,writearray[0]);
+	// Populate DC offset LUT
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	return E4000_1_SUCCESS;
+}
+/****************************************************************************\
+*  Function: GainControlinit
+*
+*  Detailed Description:
+*  Configures gain control mode. (Registers 0x1a)
+*
+\****************************************************************************/
+int GainControlauto(int pTuner)
+{
+	unsigned char writearray[5];
+	int status;
+
+	writearray[0] = 23;
+	status=I2CWriteByte(pTuner, 200,26,writearray[0]);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	return E4000_1_SUCCESS;
+}
+/****************************************************************************\
+*  Main program
+*
+*
+*
+\****************************************************************************/
+/*
+int main()
+{
+     Gainmanual();
+     PLL(Ref_clk, Freq);
+     LNAfilter(Freq);
+     IFfilter(bandwidth, Ref_clk);
+     freqband(Freq);
+     DCoffLUT();
+     GainControlauto();
+  return(0);
+}
+*/
+
+// Elonics source code - RT2832_SW_optimisation_rev2.c
+
+
+
+/****************************************************************************\
+*  Function: E4000_sensitivity
+*
+*  Detailed Description:
+*  The function configures the E4000 for sensitivity mode.
+*
+\****************************************************************************/
+
+int E4000_sensitivity(int pTuner, int Freq, int bandwidth)
+{
+	unsigned char writearray[2];
+	int status;
+	int IF_BW;
+
+	writearray[1]=0x00;
+
+	if(Freq<=700000)
+	{
+		writearray[0] = 0x07;
+	}
+	else
+	{
+		writearray[0] = 0x05;
+	}
+	status = I2CWriteArray(pTuner,200,36,1,writearray);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	IF_BW = bandwidth / 2;
+	if(IF_BW<=2500)
+	{
+		writearray[0]=0xfc;
+		writearray[1]=0x17;
+	}
+    else if(IF_BW<=3000)
+	{
+		writearray[0]=0xfb;
+		writearray[1]=0x0f;
+	}
+	else if(IF_BW<=3500)
+	{
+		writearray[0]=0xf9;
+		writearray[1]=0x0b;
+	}
+	else if(IF_BW<=4000)
+	{
+		writearray[0]=0xf8;
+		writearray[1]=0x07;
+	}
+	status = I2CWriteArray(pTuner,200,17,2,writearray);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	return E4000_1_SUCCESS;
+}
+/****************************************************************************\
+*  Function: E4000_linearity
+*
+*  Detailed Description:
+*  The function configures the E4000 for linearity mode.
+*
+\****************************************************************************/
+int E4000_linearity(int pTuner, int Freq, int bandwidth)
+{
+
+	unsigned char writearray[2];
+	int status;
+	int IF_BW;
+
+	writearray[1]=0x00;
+
+	if(Freq<=700000)
+	{
+		writearray[0] = 0x03;
+	}
+	else
+	{
+		writearray[0] = 0x01;
+	}
+	status = I2CWriteArray(pTuner,200,36,1,writearray);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	IF_BW = bandwidth / 2;
+	if(IF_BW<=2500)
+	{
+		writearray[0]=0xfe;
+		writearray[1]=0x19;
+	}
+	else if(IF_BW<=3000)
+	{
+		writearray[0]=0xfd;
+		writearray[1]=0x11;
+	}
+	else if(IF_BW<=3500)
+	{
+		writearray[0]=0xfb;
+		writearray[1]=0x0d;
+	}
+	else if(IF_BW<=4000)
+	{
+		writearray[0]=0xfa;
+		writearray[1]=0x0a;
+	}
+	status = I2CWriteArray(pTuner,200,17,2,writearray);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	return E4000_1_SUCCESS;
+}
+/****************************************************************************\
+*  Function: E4000_nominal
+*
+*  Detailed Description:
+*  The function configures the E4000 for nominal
+*
+\****************************************************************************/
+int E4000_nominal(int pTuner, int Freq, int bandwidth)
+{
+	unsigned char writearray[2];
+	int status;
+	int IF_BW;
+
+	writearray[1]=0x00;
+
+	if(Freq<=700000)
+	{
+		writearray[0] = 0x03;
+	}
+	else
+	{
+		writearray[0] = 0x01;
+	}
+	status = I2CWriteArray(pTuner,200,36,1,writearray);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	IF_BW = bandwidth / 2;
+	if(IF_BW<=2500)
+	{
+		writearray[0]=0xfc;
+		writearray[1]=0x17;
+	}
+	else if(IF_BW<=3000)
+	{
+		writearray[0]=0xfb;
+		writearray[1]=0x0f;
+	}
+	else if(IF_BW<=3500)
+	{
+		writearray[0]=0xf9;
+		writearray[1]=0x0b;
+	}
+	else if(IF_BW<=4000)
+	{
+		writearray[0]=0xf8;
+		writearray[1]=0x07;
+	}
+	status = I2CWriteArray(pTuner,200,17,2,writearray);
+	if(status != E4000_I2C_SUCCESS)
+	{
+		return E4000_1_FAIL;
+	}
+
+	return E4000_1_SUCCESS;
+}
+
diff --git a/src/tuner_e4000.h b/src/tuner_e4000.h
new file mode 100644
index 0000000..f74de17
--- /dev/null
+++ b/src/tuner_e4000.h
@@ -0,0 +1,236 @@
+#ifndef __TUNER_E4000_H
+#define __TUNER_E4000_H
+
+/**
+
+@file
+
+@brief   E4000 tuner module declaration
+
+One can manipulate E4000 tuner through E4000 module.
+E4000 module is derived from tuner module.
+
+
+
+@par Example:
+@code
+
+// The example is the same as the tuner example in tuner_base.h except the listed lines.
+
+
+
+#include "tuner_e4000.h"
+
+
+...
+
+
+
+int main(void)
+{
+	TUNER_MODULE        *pTuner;
+	E4000_EXTRA_MODULE *pTunerExtra;
+
+	TUNER_MODULE          TunerModuleMemory;
+	BASE_INTERFACE_MODULE BaseInterfaceModuleMemory;
+//	I2C_BRIDGE_MODULE     I2cBridgeModuleMemory;
+
+	unsigned long BandwidthMode;
+
+
+	...
+
+
+
+	// Build E4000 tuner module.
+	BuildE4000Module(
+		&pTuner,
+		&TunerModuleMemory,
+		&BaseInterfaceModuleMemory,
+		&I2cBridgeModuleMemory,
+		0xac,								// I2C device address is 0xac in 8-bit format.
+		CRYSTAL_FREQ_16384000HZ,			// Crystal frequency is 16.384 MHz.
+		E4000_AGC_INTERNAL					// The E4000 AGC mode is internal AGC mode.
+		);
+
+
+
+
+
+	// Get E4000 tuner extra module.
+	pTunerExtra = (T2266_EXTRA_MODULE *)(pTuner->pExtra);
+
+
+
+
+
+	// ==== Initialize tuner and set its parameters =====
+
+	...
+
+	// Set E4000 bandwidth.
+	pTunerExtra->SetBandwidthMode(pTuner, E4000_BANDWIDTH_6MHZ);
+
+
+
+
+
+	// ==== Get tuner information =====
+
+	...
+
+	// Get E4000 bandwidth.
+	pTunerExtra->GetBandwidthMode(pTuner, &BandwidthMode);
+
+
+
+	// See the example for other tuner functions in tuner_base.h
+
+
+	return 0;
+}
+
+
+@endcode
+
+*/
+
+
+
+
+
+//#include "tuner_base.h"
+
+
+
+
+
+// The following context is implemented for E4000 source code.
+
+
+// Definition (implemeted for E4000)
+#define E4000_1_SUCCESS			1
+#define E4000_1_FAIL			0
+#define E4000_I2C_SUCCESS		1
+#define E4000_I2C_FAIL			0
+
+
+
+// Function (implemeted for E4000)
+int
+I2CReadByte(
+	int pTuner,
+	unsigned char NoUse,
+	unsigned char RegAddr,
+	unsigned char *pReadingByte
+	);
+
+int
+I2CWriteByte(
+	int pTuner,
+	unsigned char NoUse,
+	unsigned char RegAddr,
+	unsigned char WritingByte
+	);
+
+int
+I2CWriteArray(
+	int pTuner,
+	unsigned char NoUse,
+	unsigned char RegStartAddr,
+	unsigned char ByteNum,
+	unsigned char *pWritingBytes
+	);
+
+
+
+// Functions (from E4000 source code)
+int tunerreset (int pTuner);
+int Tunerclock(int pTuner);
+int Qpeak(int pTuner);
+int DCoffloop(int pTuner);
+int GainControlinit(int pTuner);
+
+int Gainmanual(int pTuner);
+int E4000_gain_freq(int pTuner, int frequency);
+int PLL(int pTuner, int Ref_clk, int Freq);
+int LNAfilter(int pTuner, int Freq);
+int IFfilter(int pTuner, int bandwidth, int Ref_clk);
+int freqband(int pTuner, int Freq);
+int DCoffLUT(int pTuner);
+int GainControlauto(int pTuner);
+
+int E4000_sensitivity(int pTuner, int Freq, int bandwidth);
+int E4000_linearity(int pTuner, int Freq, int bandwidth);
+int E4000_high_linearity(int pTuner);
+int E4000_nominal(int pTuner, int Freq, int bandwidth);
+
+
+// The following context is E4000 tuner API source code
+
+// Definitions
+
+// Bandwidth in Hz
+enum E4000_BANDWIDTH_HZ
+{
+	E4000_BANDWIDTH_6000000HZ = 6000000,
+	E4000_BANDWIDTH_7000000HZ = 7000000,
+	E4000_BANDWIDTH_8000000HZ = 8000000,
+};
+
+
+// Manipulaing functions
+void
+e4000_GetTunerType(
+	int pTuner,
+	int *pTunerType
+	);
+
+void
+e4000_GetDeviceAddr(
+	int pTuner,
+	unsigned char *pDeviceAddr
+	);
+
+int
+e4000_Initialize(
+	int pTuner
+	);
+
+int
+e4000_SetRfFreqHz(
+	int pTuner,
+	unsigned long RfFreqHz
+	);
+
+int
+e4000_GetRfFreqHz(
+	int pTuner,
+	unsigned long *pRfFreqHz
+	);
+
+
+
+
+
+// Extra manipulaing functions
+int
+e4000_GetRegByte(
+	int pTuner,
+	unsigned char RegAddr,
+	unsigned char *pReadingByte
+	);
+
+int
+e4000_SetBandwidthHz(
+	int pTuner,
+	unsigned long BandwidthHz
+	);
+
+int
+e4000_GetBandwidthHz(
+	int pTuner,
+	unsigned long *pBandwidthHz
+	);
+
+#endif
diff --git a/src/tuner_fc0013.c b/src/tuner_fc0013.c
new file mode 100644
index 0000000..73b1ed9
--- /dev/null
+++ b/src/tuner_fc0013.c
@@ -0,0 +1,433 @@
+/*
+ * Fitipower FC0013 tuner driver, taken from the kernel driver that can be found
+ * on http://linux.terratec.de/tv_en.html
+ *
+ * This driver is a mess, and should be cleaned up/rewritten.
+ *
+ */
+
+#include <stdint.h>
+#include "tuner_fc0013.h"
+
+#define CRYSTAL_FREQ		28800000
+#define FC0013_I2C_ADDR		0xc6
+
+/* glue functions to rtl-sdr code */
+int FC0013_Write(int pTuner, unsigned char RegAddr, unsigned char Byte)
+{
+	uint8_t data[2];
+
+	data[0] = RegAddr;
+	data[1] = Byte;
+
+	if (rtl_i2c_write(FC0013_I2C_ADDR, data, 2) < 0)
+		return FC0013_I2C_ERROR;
+
+	return FC0013_I2C_SUCCESS;
+}
+
+int FC0013_Read(int pTuner, unsigned char RegAddr, unsigned char *pByte)
+{
+	uint8_t data = RegAddr;
+
+	if (rtl_i2c_write(FC0013_I2C_ADDR, &data, 1) < 0)
+		return FC0013_I2C_ERROR;
+
+	if (rtl_i2c_read(FC0013_I2C_ADDR, &data, 1) < 0)
+		return FC0013_I2C_ERROR;
+
+	*pByte = data;
+
+	return FC0013_I2C_SUCCESS;
+}
+
+int FC0013_SetVhfTrack(int pTuner, unsigned long FrequencyKHz)
+{
+	unsigned char read_byte;
+
+    if (FrequencyKHz <= 177500)	// VHF Track: 7
+    {
+		if(FC0013_Read(pTuner, 0x1D, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
+		if(FC0013_Write(pTuner, 0x1D, (read_byte & 0xE3) | 0x1C) != FC0013_I2C_SUCCESS) goto error_status;
+
+    }
+    else if (FrequencyKHz <= 184500)	// VHF Track: 6
+    {
+		if(FC0013_Read(pTuner, 0x1D, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
+		if(FC0013_Write(pTuner, 0x1D, (read_byte & 0xE3) | 0x18) != FC0013_I2C_SUCCESS) goto error_status;
+
+    }
+    else if (FrequencyKHz <= 191500)	// VHF Track: 5
+    {
+		if(FC0013_Read(pTuner, 0x1D, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
+		if(FC0013_Write(pTuner, 0x1D, (read_byte & 0xE3) | 0x14) != FC0013_I2C_SUCCESS) goto error_status;
+
+    }
+    else if (FrequencyKHz <= 198500)	// VHF Track: 4
+    {
+		if(FC0013_Read(pTuner, 0x1D, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
+		if(FC0013_Write(pTuner, 0x1D, (read_byte & 0xE3) | 0x10) != FC0013_I2C_SUCCESS) goto error_status;
+
+    }
+    else if (FrequencyKHz <= 205500)	// VHF Track: 3
+    {
+		if(FC0013_Read(pTuner, 0x1D, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
+		if(FC0013_Write(pTuner, 0x1D, (read_byte & 0xE3) | 0x0C) != FC0013_I2C_SUCCESS) goto error_status;
+
+    }
+    else if (FrequencyKHz <= 212500)	// VHF Track: 2
+    {
+		if(FC0013_Read(pTuner, 0x1D, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
+		if(FC0013_Write(pTuner, 0x1D, (read_byte & 0xE3) | 0x08) != FC0013_I2C_SUCCESS) goto error_status;
+
+    }
+    else if (FrequencyKHz <= 219500)	// VHF Track: 2
+    {
+		if(FC0013_Read(pTuner, 0x1D, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
+		if(FC0013_Write(pTuner, 0x1D, (read_byte & 0xE3) | 0x08) != FC0013_I2C_SUCCESS) goto error_status;
+
+    }
+    else if (FrequencyKHz <= 226500)	// VHF Track: 1
+    {
+		if(FC0013_Read(pTuner, 0x1D, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
+		if(FC0013_Write(pTuner, 0x1D, (read_byte & 0xE3) | 0x04) != FC0013_I2C_SUCCESS) goto error_status;
+    }
+    else	// VHF Track: 1
+    {
+		if(FC0013_Read(pTuner, 0x1D, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
+		if(FC0013_Write(pTuner, 0x1D, (read_byte & 0xE3) | 0x04) != FC0013_I2C_SUCCESS) goto error_status;
+
+    }
+
+	//------------------------------------------------ arios modify 2010-12-24
+	// " | 0x10" ==> " | 0x30"   (make sure reg[0x07] bit5 = 1)
+
+	// Enable VHF filter.
+	if(FC0013_Read(pTuner, 0x07, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
+	if(FC0013_Write(pTuner, 0x07, read_byte | 0x10) != FC0013_I2C_SUCCESS) goto error_status;
+
+	// Disable UHF & GPS.
+	if(FC0013_Read(pTuner, 0x14, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
+	if(FC0013_Write(pTuner, 0x14, read_byte & 0x1F) != FC0013_I2C_SUCCESS) goto error_status;
+
+
+	return FC0013_FUNCTION_SUCCESS;
+
+error_status:
+	return FC0013_FUNCTION_ERROR;
+}
+
+
+// FC0013 Open Function, includes enable/reset pin control and registers initialization.
+//void FC0013_Open()
+int FC0013_Open()
+{
+	int pTuner = 1;
+	// Enable FC0013 Power
+	// (...)
+	// FC0013 Enable = High
+	// (...)
+	// FC0013 Reset = High -> Low
+	// (...)
+
+    //================================ update base on new FC0013 register bank
+	if(FC0013_Write(pTuner, 0x01, 0x09) != FC0013_I2C_SUCCESS) goto error_status;
+	if(FC0013_Write(pTuner, 0x02, 0x16) != FC0013_I2C_SUCCESS) goto error_status;
+	if(FC0013_Write(pTuner, 0x03, 0x00) != FC0013_I2C_SUCCESS) goto error_status;
+	if(FC0013_Write(pTuner, 0x04, 0x00) != FC0013_I2C_SUCCESS) goto error_status;
+	if(FC0013_Write(pTuner, 0x05, 0x17) != FC0013_I2C_SUCCESS) goto error_status;
+	if(FC0013_Write(pTuner, 0x06, 0x02) != FC0013_I2C_SUCCESS) goto error_status;
+//	if(FC0013_Write(pTuner, 0x07, 0x27) != FC0013_I2C_SUCCESS) goto error_status;		// 28.8MHz, GainShift: 15
+	if(FC0013_Write(pTuner, 0x07, 0x2A) != FC0013_I2C_SUCCESS) goto error_status;		// 28.8MHz, modified by Realtek
+	if(FC0013_Write(pTuner, 0x08, 0xFF) != FC0013_I2C_SUCCESS) goto error_status;
+	if(FC0013_Write(pTuner, 0x09, 0x6F) != FC0013_I2C_SUCCESS) goto error_status;		// Enable Loop Through
+	if(FC0013_Write(pTuner, 0x0A, 0xB8) != FC0013_I2C_SUCCESS) goto error_status;
+	if(FC0013_Write(pTuner, 0x0B, 0x82) != FC0013_I2C_SUCCESS) goto error_status;
+
+	if(FC0013_Write(pTuner, 0x0C, 0xFE) != FC0013_I2C_SUCCESS) goto error_status;   // Modified for up-dowm AGC by Realtek(for master, and for 2836BU dongle).
+//	if(FC0013_Write(pTuner, 0x0C, 0xFC) != FC0013_I2C_SUCCESS) goto error_status;   // Modified for up-dowm AGC by Realtek(for slave, and for 2832 mini dongle).
+
+//	if(FC0013_Write(pTuner, 0x0D, 0x09) != FC0013_I2C_SUCCESS) goto error_status;
+	if(FC0013_Write(pTuner, 0x0D, 0x01) != FC0013_I2C_SUCCESS) goto error_status;   // Modified for AGC non-forcing by Realtek.
+
+	if(FC0013_Write(pTuner, 0x0E, 0x00) != FC0013_I2C_SUCCESS) goto error_status;
+	if(FC0013_Write(pTuner, 0x0F, 0x00) != FC0013_I2C_SUCCESS) goto error_status;
+	if(FC0013_Write(pTuner, 0x10, 0x00) != FC0013_I2C_SUCCESS) goto error_status;
+	if(FC0013_Write(pTuner, 0x11, 0x00) != FC0013_I2C_SUCCESS) goto error_status;
+	if(FC0013_Write(pTuner, 0x12, 0x00) != FC0013_I2C_SUCCESS) goto error_status;
+	if(FC0013_Write(pTuner, 0x13, 0x00) != FC0013_I2C_SUCCESS) goto error_status;
+
+	if(FC0013_Write(pTuner, 0x14, 0x50) != FC0013_I2C_SUCCESS) goto error_status;		// DVB-T, High Gain
+//	if(FC0013_Write(pTuner, 0x14, 0x48) != FC0013_I2C_SUCCESS) goto error_status;		// DVB-T, Middle Gain
+//	if(FC0013_Write(pTuner, 0x14, 0x40) != FC0013_I2C_SUCCESS) goto error_status;		// DVB-T, Low Gain
+
+	if(FC0013_Write(pTuner, 0x15, 0x01) != FC0013_I2C_SUCCESS) goto error_status;
+
+
+	return FC0013_FUNCTION_SUCCESS;
+
+error_status:
+	return FC0013_FUNCTION_ERROR;
+}
+
+
+int FC0013_SetFrequency(unsigned long Frequency, unsigned short Bandwidth)
+{
+//    bool VCO1 = false;
+//    unsigned int doubleVCO;
+//    unsigned short xin, xdiv;
+//	unsigned char reg[21], am, pm, multi;
+    int VCO1 = FC0013_FALSE;
+    unsigned long doubleVCO;
+    unsigned short xin, xdiv;
+	unsigned char reg[21], am, pm, multi;
+
+	unsigned char read_byte;
+
+	unsigned long CrystalFreqKhz;
+
+	int pTuner =1;
+
+	int CrystalFreqHz = CRYSTAL_FREQ;
+
+	// Get tuner crystal frequency in KHz.
+	// Note: CrystalFreqKhz = round(CrystalFreqHz / 1000)
+	CrystalFreqKhz = (CrystalFreqHz + 500) / 1000;
+
+	// modified 2011-02-09: for D-Book test
+	// set VHF_Track = 7
+	if(FC0013_Read(pTuner, 0x1D, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
+
+	// VHF Track: 7
+    if(FC0013_Write(pTuner, 0x1D, (read_byte & 0xE3) | 0x1C) != FC0013_I2C_SUCCESS) goto error_status;
+
+
+	if( Frequency < 300000 )
+	{
+		// Set VHF Track.
+		if(FC0013_SetVhfTrack(pTuner, Frequency) != FC0013_I2C_SUCCESS) goto error_status;
+
+		// Enable VHF filter.
+		if(FC0013_Read(pTuner, 0x07, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
+		if(FC0013_Write(pTuner, 0x07, read_byte | 0x10) != FC0013_I2C_SUCCESS) goto error_status;
+
+		// Disable UHF & disable GPS.
+		if(FC0013_Read(pTuner, 0x14, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
+		if(FC0013_Write(pTuner, 0x14, read_byte & 0x1F) != FC0013_I2C_SUCCESS) goto error_status;
+	}
+	else if ( (Frequency >= 300000) && (Frequency <= 862000) )
+	{
+		// Disable VHF filter.
+		if(FC0013_Read(pTuner, 0x07, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
+		if(FC0013_Write(pTuner, 0x07, read_byte & 0xEF) != FC0013_I2C_SUCCESS) goto error_status;
+
+		// enable UHF & disable GPS.
+		if(FC0013_Read(pTuner, 0x14, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
+		if(FC0013_Write(pTuner, 0x14, (read_byte & 0x1F) | 0x40) != FC0013_I2C_SUCCESS) goto error_status;
+	}
+	else if (Frequency > 862000)
+	{
+		// Disable VHF filter
+		if(FC0013_Read(pTuner, 0x07, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
+		if(FC0013_Write(pTuner, 0x07, read_byte & 0xEF) != FC0013_I2C_SUCCESS) goto error_status;
+
+		// Disable UHF & enable GPS
+		if(FC0013_Read(pTuner, 0x14, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
+		if(FC0013_Write(pTuner, 0x14, (read_byte & 0x1F) | 0x20) != FC0013_I2C_SUCCESS) goto error_status;
+	}
+
+	if (Frequency * 96 < 3560000)
+    {
+        multi = 96;
+        reg[5] = 0x82;
+        reg[6] = 0x00;
+    }
+    else if (Frequency * 64 < 3560000)
+    {
+        multi = 64;
+        reg[5] = 0x02;
+        reg[6] = 0x02;
+    }
+    else if (Frequency * 48 < 3560000)
+    {
+        multi = 48;
+        reg[5] = 0x42;
+        reg[6] = 0x00;
+    }
+    else if (Frequency * 32 < 3560000)
+    {
+        multi = 32;
+        reg[5] = 0x82;
+        reg[6] = 0x02;
+    }
+    else if (Frequency * 24 < 3560000)
+    {
+        multi = 24;
+        reg[5] = 0x22;
+        reg[6] = 0x00;
+    }
+    else if (Frequency * 16 < 3560000)
+    {
+        multi = 16;
+        reg[5] = 0x42;
+        reg[6] = 0x02;
+    }
+    else if (Frequency * 12 < 3560000)
+    {
+        multi = 12;
+        reg[5] = 0x12;
+        reg[6] = 0x00;
+    }
+    else if (Frequency * 8 < 3560000)
+    {
+        multi = 8;
+        reg[5] = 0x22;
+        reg[6] = 0x02;
+    }
+    else if (Frequency * 6 < 3560000)
+    {
+        multi = 6;
+        reg[5] = 0x0A;
+        reg[6] = 0x00;
+    }
+    else if (Frequency * 4 < 3800000)
+    {
+        multi = 4;
+        reg[5] = 0x12;
+        reg[6] = 0x02;
+    }
+	else
+	{
+        Frequency = Frequency / 2;
+		multi = 4;
+        reg[5] = 0x0A;
+        reg[6] = 0x02;
+	}
+
+    doubleVCO = Frequency * multi;
+
+    reg[6] = reg[6] | 0x08;
+//	VCO1 = true;
+	VCO1 = FC0013_TRUE;
+
+	// Calculate VCO parameters: ap & pm & xin.
+//	xdiv = (unsigned short)(doubleVCO / (Crystal_Frequency/2));
+	xdiv = (unsigned short)(doubleVCO / (CrystalFreqKhz/2));
+//	if( (doubleVCO - xdiv * (Crystal_Frequency/2)) >= (Crystal_Frequency/4) )
+	if( (doubleVCO - xdiv * (CrystalFreqKhz/2)) >= (CrystalFreqKhz/4) )
+	{
+		xdiv = xdiv + 1;
+	}
+
+	pm = (unsigned char)( xdiv / 8 );
+    am = (unsigned char)( xdiv - (8 * pm));
+
+    if (am < 2)
+    {
+        reg[1] = am + 8;
+        reg[2] = pm - 1;
+    }
+    else
+    {
+        reg[1] = am;
+        reg[2] = pm;
+    }
+
+//	xin = (unsigned short)(doubleVCO - ((unsigned short)(doubleVCO / (Crystal_Frequency/2))) * (Crystal_Frequency/2));
+	xin = (unsigned short)(doubleVCO - ((unsigned short)(doubleVCO / (CrystalFreqKhz/2))) * (CrystalFreqKhz/2));
+//	xin = ((xin << 15)/(Crystal_Frequency/2));
+	xin = (unsigned short)((xin << 15)/(CrystalFreqKhz/2));
+
+//	if( xin >= (unsigned short) pow( (double)2, (double)14) )
+//	{
+//		xin = xin + (unsigned short) pow( (double)2, (double)15);
+//	}
+	if( xin >= (unsigned short) 16384 )
+		xin = xin + (unsigned short) 32768;
+
+	reg[3] = (unsigned char)(xin >> 8);
+	reg[4] = (unsigned char)(xin & 0x00FF);
+
+
+	//===================================== Only for testing
+//	printf("Frequency: %d, Fa: %d, Fp: %d, Xin:%d \n", Frequency, am, pm, xin);
+
+
+	// Set Low-Pass Filter Bandwidth.
+    switch(Bandwidth)
+    {
+        case 6:
+			reg[6] = 0x80 | reg[6];
+            break;
+        case 7:
+			reg[6] = ~0x80 & reg[6];
+            reg[6] = 0x40 | reg[6];
+            break;
+        case 8:
+        default:
+			reg[6] = ~0xC0 & reg[6];
+            break;
+    }
+
+	reg[5] = reg[5] | 0x07;
+
+	if(FC0013_Write(pTuner, 0x01, reg[1]) != FC0013_I2C_SUCCESS) goto error_status;
+	if(FC0013_Write(pTuner, 0x02, reg[2]) != FC0013_I2C_SUCCESS) goto error_status;
+	if(FC0013_Write(pTuner, 0x03, reg[3]) != FC0013_I2C_SUCCESS) goto error_status;
+	if(FC0013_Write(pTuner, 0x04, reg[4]) != FC0013_I2C_SUCCESS) goto error_status;
+	if(FC0013_Write(pTuner, 0x05, reg[5]) != FC0013_I2C_SUCCESS) goto error_status;
+	if(FC0013_Write(pTuner, 0x06, reg[6]) != FC0013_I2C_SUCCESS) goto error_status;
+
+	if (multi == 64)
+	{
+//		FC0013_Write(0x11, FC0013_Read(0x11) | 0x04);
+		if(FC0013_Read(pTuner, 0x11, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
+		if(FC0013_Write(pTuner, 0x11, read_byte | 0x04) != FC0013_I2C_SUCCESS) goto error_status;
+	}
+	else
+	{
+//		FC0013_Write(0x11, FC0013_Read(0x11) & 0xFB);
+		if(FC0013_Read(pTuner, 0x11, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
+		if(FC0013_Write(pTuner, 0x11, read_byte & 0xFB) != FC0013_I2C_SUCCESS) goto error_status;
+	}
+
+	if(FC0013_Write(pTuner, 0x0E, 0x80) != FC0013_I2C_SUCCESS) goto error_status;
+	if(FC0013_Write(pTuner, 0x0E, 0x00) != FC0013_I2C_SUCCESS) goto error_status;
+
+	if(FC0013_Write(pTuner, 0x0E, 0x00) != FC0013_I2C_SUCCESS) goto error_status;
+//	reg[14] = 0x3F & FC0013_Read(0x0E);
+	if(FC0013_Read(pTuner, 0x0E, &read_byte) != FC0013_I2C_SUCCESS) goto error_status;
+	reg[14] = 0x3F & read_byte;
+
+	if (VCO1)
+    {
+        if (reg[14] > 0x3C)
+        {
+            reg[6] = ~0x08 & reg[6];
+
+			if(FC0013_Write(pTuner, 0x06, reg[6]) != FC0013_I2C_SUCCESS) goto error_status;
+
+			if(FC0013_Write(pTuner, 0x0E, 0x80) != FC0013_I2C_SUCCESS) goto error_status;
+			if(FC0013_Write(pTuner, 0x0E, 0x00) != FC0013_I2C_SUCCESS) goto error_status;
+        }
+    }
+	else
+    {
+        if (reg[14] < 0x02)
+        {
+            reg[6] = 0x08 | reg[6];
+
+			if(FC0013_Write(pTuner, 0x06, reg[6]) != FC0013_I2C_SUCCESS) goto error_status;
+
+			if(FC0013_Write(pTuner, 0x0E, 0x80) != FC0013_I2C_SUCCESS) goto error_status;
+			if(FC0013_Write(pTuner, 0x0E, 0x00) != FC0013_I2C_SUCCESS) goto error_status;
+        }
+    }
+
+
+	return 1;
+
+error_status:
+	return 0;
+}
+
diff --git a/src/tuner_fc0013.h b/src/tuner_fc0013.h
new file mode 100644
index 0000000..b04d7d1
--- /dev/null
+++ b/src/tuner_fc0013.h
@@ -0,0 +1,155 @@
+#ifndef __TUNER_FC0013_H
+#define __TUNER_FC0013_H
+
+/**
+
+@file
+
+@brief   FC0013 tuner module declaration
+
+One can manipulate FC0013 tuner through FC0013 module.
+FC0013 module is derived from tuner module.
+
+
+// The following context is implemented for FC0013 source code.
+
+**/
+
+// Definitions
+enum FC0013_TRUE_FALSE_STATUS
+{
+	FC0013_FALSE,
+	FC0013_TRUE,
+};
+
+
+enum FC0013_I2C_STATUS
+{
+	FC0013_I2C_SUCCESS,
+	FC0013_I2C_ERROR,
+};
+
+
+enum FC0013_FUNCTION_STATUS
+{
+	FC0013_FUNCTION_SUCCESS,
+	FC0013_FUNCTION_ERROR,
+};
+
+
+
+// Functions
+int FC0013_Read(int pTuner, unsigned char RegAddr, unsigned char *pByte);
+int FC0013_Write(int pTuner, unsigned char RegAddr, unsigned char Byte);
+
+int
+fc0013_SetRegMaskBits(
+	int pTuner,
+	unsigned char RegAddr,
+	unsigned char Msb,
+	unsigned char Lsb,
+	const unsigned char WritingValue
+	);
+
+int
+fc0013_GetRegMaskBits(
+	int pTuner,
+	unsigned char RegAddr,
+	unsigned char Msb,
+	unsigned char Lsb,
+	unsigned char *pReadingValue
+	);
+
+int FC0013_Open();
+int FC0013_SetFrequency(unsigned long Frequency, unsigned short Bandwidth);
+
+// Set VHF Track depends on input frequency
+int FC0013_SetVhfTrack(int pTuner, unsigned long Frequency);
+
+
+// The following context is FC0013 tuner API source code
+
+
+// Definitions
+
+// Bandwidth mode
+enum FC0013_BANDWIDTH_MODE
+{
+	FC0013_BANDWIDTH_6000000HZ = 6,
+	FC0013_BANDWIDTH_7000000HZ = 7,
+	FC0013_BANDWIDTH_8000000HZ = 8,
+};
+
+
+// Default for initialing
+#define FC0013_RF_FREQ_HZ_DEFAULT			50000000
+#define FC0013_BANDWIDTH_MODE_DEFAULT		FC0013_BANDWIDTH_8000000HZ
+
+
+// Tuner LNA
+enum FC0013_LNA_GAIN_VALUE
+{
+	FC0013_LNA_GAIN_LOW     = 0x00,	// -6.3dB
+	FC0013_LNA_GAIN_MIDDLE  = 0x08,	//  7.1dB
+	FC0013_LNA_GAIN_HIGH_17 = 0x11,	// 19.1dB
+	FC0013_LNA_GAIN_HIGH_19 = 0x10,	// 19.7dB
+};
+
+// Manipulaing functions
+void
+fc0013_GetTunerType(
+	int pTuner,
+	int *pTunerType
+	);
+
+void
+fc0013_GetDeviceAddr(
+	int pTuner,
+	unsigned char *pDeviceAddr
+	);
+
+int
+fc0013_Initialize(
+	int pTuner
+	);
+
+int
+fc0013_SetRfFreqHz(
+	int pTuner,
+	unsigned long RfFreqHz
+	);
+
+int
+fc0013_GetRfFreqHz(
+	int pTuner,
+	unsigned long *pRfFreqHz
+	);
+
+// Extra manipulaing functions
+int
+fc0013_SetBandwidthMode(
+	int pTuner,
+	int BandwidthMode
+	);
+
+int
+fc0013_GetBandwidthMode(
+	int pTuner,
+	int *pBandwidthMode
+	);
+
+int
+fc0013_RcCalReset(
+	int pTuner
+	);
+
+int
+fc0013_RcCalAdd(
+	int pTuner,
+	int RcValue
+	);
+
+
+
+
+#endif