From e018ceebed74b8223482bc9d1ed0b31c938381da Mon Sep 17 00:00:00 2001 From: Yuval Adam Date: Mon, 29 Oct 2012 23:04:19 +0200 Subject: New example files --- boards/ek-lm4f120xl/usb_dev_bulk/usb_dev_bulk.c | 613 ++++++++++++++++++++++++ 1 file changed, 613 insertions(+) create mode 100644 boards/ek-lm4f120xl/usb_dev_bulk/usb_dev_bulk.c (limited to 'boards/ek-lm4f120xl/usb_dev_bulk/usb_dev_bulk.c') diff --git a/boards/ek-lm4f120xl/usb_dev_bulk/usb_dev_bulk.c b/boards/ek-lm4f120xl/usb_dev_bulk/usb_dev_bulk.c new file mode 100644 index 0000000..af4e3c6 --- /dev/null +++ b/boards/ek-lm4f120xl/usb_dev_bulk/usb_dev_bulk.c @@ -0,0 +1,613 @@ +//***************************************************************************** +// +// usb_dev_bulk.c - Main routines for the generic bulk device example. +// +// Copyright (c) 2012 Texas Instruments Incorporated. All rights reserved. +// Software License Agreement +// +// Texas Instruments (TI) is supplying this software for use solely and +// exclusively on TI's microcontroller products. The software is owned by +// TI and/or its suppliers, and is protected under applicable copyright +// laws. You may not combine this software with "viral" open-source +// software in order to form a larger program. +// +// THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS. +// NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT +// NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY +// CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL +// DAMAGES, FOR ANY REASON WHATSOEVER. +// +// This is part of revision 9453 of the EK-LM4F120XL Firmware Package. +// +//***************************************************************************** + +#include "inc/hw_ints.h" +#include "inc/hw_memmap.h" +#include "inc/hw_types.h" +#include "driverlib/debug.h" +#include "driverlib/fpu.h" +#include "driverlib/gpio.h" +#include "driverlib/interrupt.h" +#include "driverlib/pin_map.h" +#include "driverlib/sysctl.h" +#include "driverlib/systick.h" +#include "driverlib/timer.h" +#include "driverlib/uart.h" +#include "driverlib/rom.h" +#include "usblib/usblib.h" +#include "usblib/usb-ids.h" +#include "usblib/device/usbdevice.h" +#include "usblib/device/usbdbulk.h" +#include "utils/uartstdio.h" +#include "utils/ustdlib.h" +#include "usb_bulk_structs.h" + +//***************************************************************************** +// +//! \addtogroup example_list +//!

USB Generic Bulk Device (usb_dev_bulk)

+//! +//! This example provides a generic USB device offering simple bulk data +//! transfer to and from the host. The device uses a vendor-specific class ID +//! and supports a single bulk IN endpoint and a single bulk OUT endpoint. +//! Data received from the host is assumed to be ASCII text and it is +//! echoed back with the case of all alphabetic characters swapped. +//! +//! A Windows INF file for the device is provided on the installation CD and +//! in the C:/StellarisWare/windows_drivers directory of StellarisWare +//! releases. This INF contains information required to install the WinUSB +//! subsystem on WindowsXP and Vista PCs. WinUSB is a Windows subsystem +//! allowing user mode applications to access the USB device without the need +//! for a vendor-specific kernel mode driver. +//! +//! A sample Windows command-line application, usb_bulk_example, illustrating +//! how to connect to and communicate with the bulk device is also provided. +//! The application binary is installed as part of the ``Windows-side examples +//! for USB kits'' package (SW-USB-win) on the installation CD or via download +//! from http://www.ti.com/stellarisware . Project files are included to allow +//! the examples to be built using Microsoft VisualStudio 2008. Source code +//! for this application can be found in directory +//! StellarisWare/tools/usb_bulk_example. +// +//***************************************************************************** + + +//***************************************************************************** +// +// The system tick rate expressed both as ticks per second and a millisecond +// period. +// +//***************************************************************************** +#define SYSTICKS_PER_SECOND 100 +#define SYSTICK_PERIOD_MS (1000 / SYSTICKS_PER_SECOND) + +//***************************************************************************** +// +// The global system tick counter. +// +//***************************************************************************** +volatile unsigned long g_ulSysTickCount = 0; + +//***************************************************************************** +// +// Variables tracking transmit and receive counts. +// +//***************************************************************************** +volatile unsigned long g_ulTxCount = 0; +volatile unsigned long g_ulRxCount = 0; +#ifdef DEBUG +unsigned long g_ulUARTRxErrors = 0; +#endif + +//***************************************************************************** +// +// Debug-related definitions and declarations. +// +// Debug output is available via UART0 if DEBUG is defined during build. +// +//***************************************************************************** +#ifdef DEBUG +//***************************************************************************** +// +// Map all debug print calls to UARTprintf in debug builds. +// +//***************************************************************************** +#define DEBUG_PRINT UARTprintf + +#else + +//***************************************************************************** +// +// Compile out all debug print calls in release builds. +// +//***************************************************************************** +#define DEBUG_PRINT while(0) ((int (*)(char *, ...))0) +#endif + +//***************************************************************************** +// +// Flags used to pass commands from interrupt context to the main loop. +// +//***************************************************************************** +#define COMMAND_PACKET_RECEIVED 0x00000001 +#define COMMAND_STATUS_UPDATE 0x00000002 + +volatile unsigned long g_ulFlags = 0; +char *g_pcStatus; + +//***************************************************************************** +// +// Global flag indicating that a USB configuration has been set. +// +//***************************************************************************** +static volatile tBoolean g_bUSBConfigured = false; + +//***************************************************************************** +// +// The error routine that is called if the driver library encounters an error. +// +//***************************************************************************** +#ifdef DEBUG +void +__error__(char *pcFilename, unsigned long ulLine) +{ + UARTprintf("Error at line %d of %s\n", ulLine, pcFilename); + while(1) + { + } +} +#endif + +//***************************************************************************** +// +// Interrupt handler for the system tick counter. +// +//***************************************************************************** +void +SysTickIntHandler(void) +{ + // + // Update our system tick counter. + // + g_ulSysTickCount++; +} + +//***************************************************************************** +// +// Receive new data and echo it back to the host. +// +// \param psDevice points to the instance data for the device whose data is to +// be processed. +// \param pcData points to the newly received data in the USB receive buffer. +// \param ulNumBytes is the number of bytes of data available to be processed. +// +// This function is called whenever we receive a notification that data is +// available from the host. We read the data, byte-by-byte and swap the case +// of any alphabetical characters found then write it back out to be +// transmitted back to the host. +// +// \return Returns the number of bytes of data processed. +// +//***************************************************************************** +static unsigned long +EchoNewDataToHost(tUSBDBulkDevice *psDevice, unsigned char *pcData, + unsigned long ulNumBytes) +{ + unsigned long ulLoop, ulSpace, ulCount; + unsigned long ulReadIndex; + unsigned long ulWriteIndex; + tUSBRingBufObject sTxRing; + + // + // Get the current buffer information to allow us to write directly to + // the transmit buffer (we already have enough information from the + // parameters to access the receive buffer directly). + // + USBBufferInfoGet(&g_sTxBuffer, &sTxRing); + + // + // How much space is there in the transmit buffer? + // + ulSpace = USBBufferSpaceAvailable(&g_sTxBuffer); + + // + // How many characters can we process this time round? + // + ulLoop = (ulSpace < ulNumBytes) ? ulSpace : ulNumBytes; + ulCount = ulLoop; + + // + // Update our receive counter. + // + g_ulRxCount += ulNumBytes; + + // + // Dump a debug message. + // + DEBUG_PRINT("Received %d bytes\n", ulNumBytes); + + // + // Set up to process the characters by directly accessing the USB buffers. + // + ulReadIndex = (unsigned long)(pcData - g_pucUSBRxBuffer); + ulWriteIndex = sTxRing.ulWriteIndex; + + while(ulLoop) + { + // + // Copy from the receive buffer to the transmit buffer converting + // character case on the way. + // + + // + // Is this a lower case character? + // + if((g_pucUSBRxBuffer[ulReadIndex] >= 'a') && + (g_pucUSBRxBuffer[ulReadIndex] <= 'z')) + { + // + // Convert to upper case and write to the transmit buffer. + // + g_pucUSBTxBuffer[ulWriteIndex] = + (g_pucUSBRxBuffer[ulReadIndex] - 'a') + 'A'; + } + else + { + // + // Is this an upper case character? + // + if((g_pucUSBRxBuffer[ulReadIndex] >= 'A') && + (g_pucUSBRxBuffer[ulReadIndex] <= 'Z')) + { + // + // Convert to lower case and write to the transmit buffer. + // + g_pucUSBTxBuffer[ulWriteIndex] = + (g_pucUSBRxBuffer[ulReadIndex] - 'Z') + 'z'; + } + else + { + // + // Copy the received character to the transmit buffer. + // + g_pucUSBTxBuffer[ulWriteIndex] = g_pucUSBRxBuffer[ulReadIndex]; + } + } + + // + // Move to the next character taking care to adjust the pointer for + // the buffer wrap if necessary. + // + ulWriteIndex++; + ulWriteIndex = (ulWriteIndex == BULK_BUFFER_SIZE) ? 0 : ulWriteIndex; + + ulReadIndex++; + ulReadIndex = (ulReadIndex == BULK_BUFFER_SIZE) ? 0 : ulReadIndex; + + ulLoop--; + } + + // + // We've processed the data in place so now send the processed data + // back to the host. + // + USBBufferDataWritten(&g_sTxBuffer, ulCount); + + DEBUG_PRINT("Wrote %d bytes\n", ulCount); + + // + // We processed as much data as we can directly from the receive buffer so + // we need to return the number of bytes to allow the lower layer to + // update its read pointer appropriately. + // + return(ulCount); +} + +//***************************************************************************** +// +// Handles bulk driver notifications related to the transmit channel (data to +// the USB host). +// +// \param pvCBData is the client-supplied callback pointer for this channel. +// \param ulEvent identifies the event we are being notified about. +// \param ulMsgValue is an event-specific value. +// \param pvMsgData is an event-specific pointer. +// +// This function is called by the bulk driver to notify us of any events +// related to operation of the transmit data channel (the IN channel carrying +// data to the USB host). +// +// \return The return value is event-specific. +// +//***************************************************************************** +unsigned long +TxHandler(void *pvCBData, unsigned long ulEvent, unsigned long ulMsgValue, + void *pvMsgData) +{ + // + // We are not required to do anything in response to any transmit event + // in this example. All we do is update our transmit counter. + // + if(ulEvent == USB_EVENT_TX_COMPLETE) + { + g_ulTxCount += ulMsgValue; + } + + // + // Dump a debug message. + // + DEBUG_PRINT("TX complete %d\n", ulMsgValue); + + return(0); +} + +//***************************************************************************** +// +// Handles bulk driver notifications related to the receive channel (data from +// the USB host). +// +// \param pvCBData is the client-supplied callback pointer for this channel. +// \param ulEvent identifies the event we are being notified about. +// \param ulMsgValue is an event-specific value. +// \param pvMsgData is an event-specific pointer. +// +// This function is called by the bulk driver to notify us of any events +// related to operation of the receive data channel (the OUT channel carrying +// data from the USB host). +// +// \return The return value is event-specific. +// +//***************************************************************************** +unsigned long +RxHandler(void *pvCBData, unsigned long ulEvent, + unsigned long ulMsgValue, void *pvMsgData) +{ + // + // Which event are we being sent? + // + switch(ulEvent) + { + // + // We are connected to a host and communication is now possible. + // + case USB_EVENT_CONNECTED: + { + g_bUSBConfigured = true; + UARTprintf("Host connected.\n"); + + // + // Flush our buffers. + // + USBBufferFlush(&g_sTxBuffer); + USBBufferFlush(&g_sRxBuffer); + + break; + } + + // + // The host has disconnected. + // + case USB_EVENT_DISCONNECTED: + { + g_bUSBConfigured = false; + UARTprintf("Host disconnected.\n"); + break; + } + + // + // A new packet has been received. + // + case USB_EVENT_RX_AVAILABLE: + { + tUSBDBulkDevice *psDevice; + + // + // Get a pointer to our instance data from the callback data + // parameter. + // + psDevice = (tUSBDBulkDevice *)pvCBData; + + // + // Read the new packet and echo it back to the host. + // + return(EchoNewDataToHost(psDevice, pvMsgData, ulMsgValue)); + } + + // + // Ignore SUSPEND and RESUME for now. + // + case USB_EVENT_SUSPEND: + case USB_EVENT_RESUME: + { + break; + } + + // + // Ignore all other events and return 0. + // + default: + { + break; + } + } + + return(0); +} + +//***************************************************************************** +// +// This is the main application entry function. +// +//***************************************************************************** +int +main(void) +{ + volatile unsigned long ulLoop; + unsigned long ulTxCount; + unsigned long ulRxCount; + + // + // Enable lazy stacking for interrupt handlers. This allows floating-point + // instructions to be used within interrupt handlers, but at the expense of + // extra stack usage. + // + ROM_FPULazyStackingEnable(); + + // + // Set the clocking to run from the PLL at 50MHz + // + ROM_SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN | + SYSCTL_XTAL_16MHZ); + + // + // Configure the relevant pins such that UART0 owns them. + // + ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA); + GPIOPinConfigure(GPIO_PA0_U0RX); + GPIOPinConfigure(GPIO_PA1_U0TX); + ROM_GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1); + + // + // Enable the GPIO port that is used for the on-board LED. + // + ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF); + + // + // Enable the GPIO pins for the LED (PF2 & PF3). + // + ROM_GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, GPIO_PIN_3|GPIO_PIN_2); + + + // + // Open UART0 and show the application name on the UART. + // + UARTStdioInit(0); + UARTprintf("\033[2JStellaris USB bulk device example\n"); + UARTprintf("---------------------------------\n\n"); + + // + // Not configured initially. + // + g_bUSBConfigured = false; + + // + // Enable the GPIO peripheral used for USB, and configure the USB + // pins. + // + ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD); + ROM_GPIOPinTypeUSBAnalog(GPIO_PORTD_BASE, GPIO_PIN_4 | GPIO_PIN_5); + + // + // Enable the system tick. + // + ROM_SysTickPeriodSet(ROM_SysCtlClockGet() / SYSTICKS_PER_SECOND); + ROM_SysTickIntEnable(); + ROM_SysTickEnable(); + + // + // Tell the user what we are up to. + // + UARTprintf("Configuring USB\n"); + + // + // Initialize the transmit and receive buffers. + // + USBBufferInit((tUSBBuffer *)&g_sTxBuffer); + USBBufferInit((tUSBBuffer *)&g_sRxBuffer); + + // + // Set the USB stack mode to Device mode with VBUS monitoring. + // + USBStackModeSet(0, USB_MODE_FORCE_DEVICE, 0); + + // + // Pass our device information to the USB library and place the device + // on the bus. + // + USBDBulkInit(0, (tUSBDBulkDevice *)&g_sBulkDevice); + + // + // Wait for initial configuration to complete. + // + UARTprintf("Waiting for host...\n"); + + // + // Clear our local byte counters. + // + ulRxCount = 0; + ulTxCount = 0; + + // + // Main application loop. + // + while(1) + { + // + // See if any data has been transferred. + // + if((ulTxCount != g_ulTxCount) || (ulRxCount != g_ulRxCount)) + { + // + // Has there been any transmit traffic since we last checked? + // + if(ulTxCount != g_ulTxCount) + { + // + // Turn on the Green LED. + // + GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_3, GPIO_PIN_3); + + // + // Delay for a bit. + // + for(ulLoop = 0; ulLoop < 150000; ulLoop++) + { + } + + // + // Turn off the Green LED. + // + GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_3, 0); + + // + // Take a snapshot of the latest transmit count. + // + ulTxCount = g_ulTxCount; + } + + // + // Has there been any receive traffic since we last checked? + // + if(ulRxCount != g_ulRxCount) + { + // + // Turn on the Blue LED. + // + GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_2, GPIO_PIN_2); + + // + // Delay for a bit. + // + for(ulLoop = 0; ulLoop < 150000; ulLoop++) + { + } + + // + // Turn off the Blue LED. + // + GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_2, 0); + + // + // Take a snapshot of the latest receive count. + // + ulRxCount = g_ulRxCount; + } + + // + // Update the display of bytes transferred. + // + UARTprintf("\rTx: %d Rx: %d", ulTxCount, ulRxCount); + } + } +} -- cgit v1.3.1