From c3e4c9a25c2910d2d66d52215b3406b13d5b23d5 Mon Sep 17 00:00:00 2001 From: Yuval Adam Date: Sun, 29 Jun 2014 12:34:32 +0300 Subject: Add more board models --- boards/dk-tm4c129x/usb_host_audio/usb_host_audio.c | 1554 ++++++++++++++++++++ 1 file changed, 1554 insertions(+) create mode 100644 boards/dk-tm4c129x/usb_host_audio/usb_host_audio.c (limited to 'boards/dk-tm4c129x/usb_host_audio/usb_host_audio.c') diff --git a/boards/dk-tm4c129x/usb_host_audio/usb_host_audio.c b/boards/dk-tm4c129x/usb_host_audio/usb_host_audio.c new file mode 100644 index 0000000..d2bee89 --- /dev/null +++ b/boards/dk-tm4c129x/usb_host_audio/usb_host_audio.c @@ -0,0 +1,1554 @@ +//***************************************************************************** +// +// usb_host_audio.c - Main routine for the USB host audio example. +// +// Copyright (c) 2012-2014 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 2.1.0.12573 of the DK-TM4C129X Firmware Package. +// +//***************************************************************************** + +#include +#include +#include +#include "inc/hw_memmap.h" +#include "inc/hw_types.h" +#include "inc/hw_ints.h" +#include "driverlib/flash.h" +#include "driverlib/gpio.h" +#include "driverlib/interrupt.h" +#include "driverlib/rom.h" +#include "driverlib/rom_map.h" +#include "driverlib/sysctl.h" +#include "driverlib/udma.h" +#include "driverlib/systick.h" +#include "driverlib/pin_map.h" +#include "grlib/grlib.h" +#include "grlib/widget.h" +#include "grlib/canvas.h" +#include "grlib/listbox.h" +#include "grlib/pushbutton.h" +#include "utils/ustdlib.h" +#include "third_party/fatfs/src/ff.h" +#include "third_party/fatfs/src/diskio.h" +#include "drivers/usb_sound.h" +#include "utils/wavfile.h" +#include "drivers/kentec320x240x16_ssd2119.h" +#include "drivers/frame.h" +#include "drivers/pinout.h" +#include "drivers/touch.h" +#include "usblib/usblib.h" +#include "usblib/host/usbhost.h" + +//***************************************************************************** +// +//! \addtogroup example_list +//!

USB host audio example application using SD Card FAT file system +//! (usb_host_audio)

+//! +//! This example application demonstrates playing .wav files from an SD card +//! that is formatted with a FAT file system using USB host audio class. The +//! application can browse the file system on the SD card and displays +//! all files that are found. Files can be selected to show their format and +//! then played if the application determines that they are a valid .wav file. +//! Only PCM format (uncompressed) files may be played. +//! +//! For additional details about FatFs, see the following site: +//! http://elm-chan.org/fsw/ff/00index_e.html +//! +//! The application can be recompiled to run using and external USB phy to +//! implement a high speed host using an external USB phy. To use the external +//! phy the application must be built with \b USE_ULPI defined. This disables +//! the internal phy and the connector on the DK-TM4C129X board and enables the +//! connections to the external ULPI phy pins on the DK-TM4C129X board. +// +//***************************************************************************** + +//***************************************************************************** +// +// The error routine that is called if the driver library encounters an error. +// +//***************************************************************************** +#ifdef DEBUG +void +__error__(char *pcFilename, uint32_t ui32Line) +{ +} + +#endif + +//***************************************************************************** +// +// Graphics context used to show text on the display. +// +//***************************************************************************** +tContext g_sContext; + +//***************************************************************************** +// +// Global needed by the FAT driver to know the processor speed of the system. +// +//***************************************************************************** +uint32_t g_ui32SysClock; + +//***************************************************************************** +// +// Defines for the basic screen area used by the application. +// +//***************************************************************************** +#define STATUS_HEIGHT 40 +#define BG_MIN_X 7 +#define BG_MAX_X (320 - 8) +#define BG_MIN_Y 24 +#define BG_MAX_Y (240 - 8) +#define BUTTON_HEIGHT (STATUS_HEIGHT - 8) + +//***************************************************************************** +// +// Forward declarations for functions called by the widgets used in the user +// interface. +// +//***************************************************************************** +void OnListBoxChange(tWidget *psWidget, int16_t i16Selected); +static void PlayPause(tWidget *psWidget); +static void Stop(tWidget *psWidget); + +//***************************************************************************** +// +// The following are data structures used by FatFs. +// +//***************************************************************************** +static FATFS g_sFatFs; +static DIR g_sDirObject; +static FILINFO g_sFileInfo; + +//***************************************************************************** +// +// Define a pair of buffers that are used for holding path information. +// The buffer size must be large enough to hold the longest expected +// full path name, including the file name, and a trailing null character. +// The initial path is set to root "/". +// +//***************************************************************************** +#define PATH_BUF_SIZE 80 +static char g_pcCwdBuf[PATH_BUF_SIZE] = "/"; +static char g_pcTmpBuf[PATH_BUF_SIZE]; + +//***************************************************************************** +// +// The number of SysTick ticks per second. +// +//***************************************************************************** +#define TICKS_PER_SECOND 100 +#define MS_PER_SYSTICK (1000 / TICKS_PER_SECOND) + +//***************************************************************************** +// +// Audio buffering definitions, these are optimized to deal with USB audio. +// AUDIO_TRANSFER_SIZE define one frame of audio at 48000 Stereo 16 bit +// and AUDIO_BUFFERS declares 16 frames(16ms) of audio buffering. +// +//***************************************************************************** +#define AUDIO_TRANSFER_SIZE (192) +#define AUDIO_BUFFERS (64) +#define AUDIO_BUFFER_SIZE (AUDIO_TRANSFER_SIZE * AUDIO_BUFFERS) +uint32_t g_ui32TransferSize; +uint32_t g_ui32BufferSize; + +//***************************************************************************** +// +// The main audio buffer and it's pointers. +// +//***************************************************************************** +uint8_t g_pui8AudioBuffer[AUDIO_BUFFER_SIZE]; +volatile uint8_t *g_pui8Read; +volatile uint8_t *g_pui8Write; +volatile uint32_t g_ui32ValidBytes; + +//***************************************************************************** +// +// Holds global flags for the system. +// +//***************************************************************************** +uint32_t g_ui32Flags; + +// +// The last transfer has competed so a new one can be started. +// +#define FLAGS_TX_COMPLETE 1 + +// +// New audio device present. +// +#define FLAGS_DEVICE_CONNECT 2 + +//***************************************************************************** +// +// The global playback state for the application. +// +//***************************************************************************** +volatile enum +{ + AUDIO_PLAYING, + AUDIO_PAUSED, + AUDIO_STOPPED, + AUDIO_NONE +} +g_ePlayState; + +//***************************************************************************** +// +// These are the global .wav file states used by the application. +// +//***************************************************************************** +tWavFile g_sWavFile; +tWavHeader g_sWavHeader; + +//***************************************************************************** +// +// Widget definitions +// +//***************************************************************************** + +//***************************************************************************** +// +// Storage for the filename listbox widget string table. +// +//***************************************************************************** +#define NUM_LIST_STRINGS 48 +const char *g_ppcDirListStrings[NUM_LIST_STRINGS]; + +//***************************************************************************** +// +// Storage for the names of the files in the current directory. Filenames +// are stored in format "(D) filename.ext" for directories or "(F) filename.ext" +// for files. +// +//***************************************************************************** +#define MAX_FILENAME_STRING_LEN (4 + 8 + 1 + 3 + 1) +char g_pcFilenames[NUM_LIST_STRINGS][MAX_FILENAME_STRING_LEN]; + +//***************************************************************************** +// +// The canvas widgets for the wav file information. +// +//***************************************************************************** +extern tCanvasWidget g_sWaveInfoBackground; + +char g_pcTime[16] = ""; +Canvas(g_sWaveInfoTime, &g_sWaveInfoBackground, 0, 0, + &g_sKentec320x240x16_SSD2119, BG_MAX_X - 166, BG_MIN_Y + 28, 158, 10, + CANVAS_STYLE_FILL | CANVAS_STYLE_TEXT | CANVAS_STYLE_TEXT_RIGHT | + CANVAS_STYLE_TEXT_OPAQUE, ClrBlack, ClrWhite, ClrWhite, + g_psFontFixed6x8, g_pcTime, 0, 0); + +char g_pcFormat[24] = ""; +Canvas(g_sWaveInfoSample, &g_sWaveInfoBackground, &g_sWaveInfoTime, 0, + &g_sKentec320x240x16_SSD2119, BG_MAX_X - 166, BG_MIN_Y + 18, 158, 10, + CANVAS_STYLE_FILL | CANVAS_STYLE_TEXT | CANVAS_STYLE_TEXT_RIGHT | + CANVAS_STYLE_TEXT_OPAQUE, ClrBlack, ClrWhite, ClrWhite, + g_psFontFixed6x8, g_pcFormat, 0, 0); + +Canvas(g_sWaveInfoFileName, &g_sWaveInfoBackground, &g_sWaveInfoSample, 0, + &g_sKentec320x240x16_SSD2119, BG_MAX_X - 166, BG_MIN_Y + 8, 158, 10, + CANVAS_STYLE_FILL | CANVAS_STYLE_TEXT | CANVAS_STYLE_TEXT_RIGHT | + CANVAS_STYLE_TEXT_OPAQUE, ClrBlack, ClrWhite, ClrWhite, + g_psFontFixed6x8, "", 0, 0); + +//***************************************************************************** +// +// The canvas widget acting as the background for the wav file information. +// +//***************************************************************************** +Canvas(g_sWaveInfoBackground, WIDGET_ROOT, 0, + &g_sWaveInfoFileName, &g_sKentec320x240x16_SSD2119, + BG_MAX_X - 170, BG_MIN_Y + 4, 166, 80, + CANVAS_STYLE_FILL, ClrBlack, ClrWhite, ClrWhite, + g_psFontFixed6x8, 0, 0, 0); + +extern tCanvasWidget g_sStatusPanel; + +// +// Status text area. +// +Canvas(g_sStatusText, &g_sStatusPanel, 0, 0, &g_sKentec320x240x16_SSD2119, + BG_MIN_X + 112, BG_MAX_Y - STATUS_HEIGHT + 4, 189, BUTTON_HEIGHT, + CANVAS_STYLE_FILL | CANVAS_STYLE_TEXT | CANVAS_STYLE_TEXT_RIGHT | + CANVAS_STYLE_TEXT_OPAQUE, ClrLightGrey, ClrDarkGray, ClrBlack, + g_psFontCmss16, "", 0, 0); + +// +// Stop button. +// +RectangularButton(g_sStop, &g_sStatusPanel, &g_sStatusText, 0, + &g_sKentec320x240x16_SSD2119, BG_MIN_X + 58, + BG_MAX_Y - STATUS_HEIGHT + 4, 50, BUTTON_HEIGHT, + PB_STYLE_FILL | PB_STYLE_TEXT | + PB_STYLE_RELEASE_NOTIFY, ClrLightGrey, ClrDarkGray, 0, + ClrBlack, g_psFontCmss16, "Stop", 0, 0, 0 ,0 , Stop); + +// +// Play/Pause button. +// +RectangularButton(g_sPlayPause, &g_sStatusPanel, &g_sStop, 0, + &g_sKentec320x240x16_SSD2119, BG_MIN_X + 4, + BG_MAX_Y - STATUS_HEIGHT + 4, 50, BUTTON_HEIGHT, + PB_STYLE_FILL | PB_STYLE_TEXT | + PB_STYLE_RELEASE_NOTIFY, ClrLightGrey, ClrDarkGray, 0, + ClrBlack, g_psFontCmss16, "Play", 0, 0, 0 ,0 , PlayPause); + +// +// Background of the status area behind the buttons. +// +Canvas(g_sStatusPanel, WIDGET_ROOT, 0, &g_sPlayPause, + &g_sKentec320x240x16_SSD2119, BG_MIN_X, BG_MAX_Y - STATUS_HEIGHT, + BG_MAX_X - BG_MIN_X, STATUS_HEIGHT, + CANVAS_STYLE_FILL | CANVAS_STYLE_TEXT_RIGHT | + CANVAS_STYLE_TEXT_TOP, ClrGray, ClrWhite, ClrBlack, 0, + 0, 0, 0); + +// +// The file list box. +// +ListBox(g_sDirList, WIDGET_ROOT, 0, 0, + &g_sKentec320x240x16_SSD2119, + BG_MIN_X + 4, BG_MIN_Y + 4, 120, + BG_MAX_Y - BG_MIN_Y - STATUS_HEIGHT - 8, + LISTBOX_STYLE_OUTLINE, ClrBlack, ClrDarkBlue, ClrSilver, ClrWhite, + ClrWhite, g_psFontCmss12, g_ppcDirListStrings, + NUM_LIST_STRINGS, 0, OnListBoxChange); + +//***************************************************************************** +// +// State information for keep track of time. +// +//***************************************************************************** +static uint32_t g_ui32BytesPlayed; +static uint32_t g_ui32NextUpdate; + +//***************************************************************************** +// +// Globals used to track play back position. +// +//***************************************************************************** +static uint16_t g_ui16Minutes; +static uint16_t g_ui16Seconds; + +//***************************************************************************** +// +// Static constant strings used by the application. +// +//***************************************************************************** +static const char g_pcPlay[] = "Play"; +static const char g_pcPause[] = "Pause"; +static const char g_pcNoDevice[] ="No USB Device "; +static const char g_pcUnknownDevice[] ="Unknown Device "; +static const char g_pcDirError[] ="Directory Read Error "; + +//***************************************************************************** +// +// This function is used to tell when to update the play back times for a file. +// It will only update the screen at 1 second intervals but can be called more +// often with no result. +// +//***************************************************************************** +static void +DisplayTime(uint32_t ui32ForceUpdate) +{ + uint32_t ui32Seconds; + uint32_t ui32Minutes; + + // + // Only display on the screen once per second. + // + if((g_ui32BytesPlayed >= g_ui32NextUpdate) || (ui32ForceUpdate != 0)) + { + // + // Set the next update time to one second later. + // + g_ui32NextUpdate = g_ui32BytesPlayed + g_sWavHeader.ui32AvgByteRate; + + // + // Calculate the integer number of minutes and seconds. + // + ui32Seconds = g_ui32BytesPlayed / g_sWavHeader.ui32AvgByteRate; + ui32Minutes = ui32Seconds / 60; + ui32Seconds -= ui32Minutes * 60; + + // + // Print the time string in the format mm.ss/mm.ss + // + usprintf(g_pcTime, "%2d:%02d/%d:%02d\0", ui32Minutes,ui32Seconds, + g_ui16Minutes, g_ui16Seconds); + + // + // Display the updated time on the screen. + // + WidgetPaint((tWidget *)&g_sWaveInfoTime); + } +} + +//***************************************************************************** +// +// This function will handle stopping the play back of audio. It will not do +// this immediately but will defer stopping audio at a later time. This allows +// this function to be called from an interrupt handler. +// +//***************************************************************************** +static void +WaveStop(void) +{ + uint32_t ui32Idx; + uint32_t *pui32Buffer; + + // + // Stop playing audio. + // + g_ePlayState = AUDIO_STOPPED; + + // + // Do unsigned long accesses to clear out the buffer. + // + pui32Buffer = (uint32_t *)g_pui8AudioBuffer; + + // + // Zero out the buffer. + // + for(ui32Idx = 0; ui32Idx < (AUDIO_BUFFER_SIZE >> 2); ui32Idx++) + { + pui32Buffer[ui32Idx] = 0; + } + + // + // Reset the number of bytes played and for a time update on the screen. + // + g_ui32BytesPlayed = 0; + g_ui32NextUpdate = 0; + DisplayTime(1); + + // + // Change the play/pause button to say play. + // + PushButtonTextSet(&g_sPlayPause, g_pcPlay); + WidgetPaint((tWidget *)&g_sPlayPause); +} + +//***************************************************************************** +// +// This function is used to change to a new directory in the file system. +// It takes a parameter that specifies the directory to make the current +// working directory. +// Path separators must use a forward slash "/". The directory parameter +// can be one of the following: +// * root ("/") +// * a fully specified path ("/my/path/to/mydir") +// * a single directory name that is in the current directory ("mydir") +// * parent directory ("..") +// +// It does not understand relative paths, so dont try something like this: +// ("../my/new/path") +// +// Once the new directory is specified, it attempts to open the directory +// to make sure it exists. If the new path is opened successfully, then +// the current working directory (cwd) is changed to the new path. +// +// In cases of error, the pui32Reason parameter will be written with one of +// the following values: +// +// NAME_TOO_LONG_ERROR - combination of paths are too long for the buffer +// OPENDIR_ERROR - there is some problem opening the new directory +// +//***************************************************************************** +static FRESULT +ChangeToDirectory(char *pcDirectory) +{ + uint32_t ui32Idx; + FRESULT fresult; + + // + // Copy the current working path into a temporary buffer so + // it can be manipulated. + // + strcpy(g_pcTmpBuf, g_pcCwdBuf); + + // + // If the first character is /, then this is a fully specified + // path, and it should just be used as-is. + // + if(pcDirectory[0] == '/') + { + // + // Make sure the new path is not bigger than the cwd buffer. + // + if(strlen(pcDirectory) + 1 > sizeof(g_pcCwdBuf)) + { + return(FR_OK); + } + + // + // If the new path name (in argv[1]) is not too long, then + // copy it into the temporary buffer so it can be checked. + // + else + { + strncpy(g_pcTmpBuf, pcDirectory, sizeof(g_pcTmpBuf)); + } + } + + // + // If the argument is .. then attempt to remove the lowest level + // on the CWD. + // + else if(!strcmp(pcDirectory, "..")) + { + // + // Get the index to the last character in the current path. + // + ui32Idx = strlen(g_pcTmpBuf) - 1; + + // + // Back up from the end of the path name until a separator (/) + // is found, or until we bump up to the start of the path. + // + while((g_pcTmpBuf[ui32Idx] != '/') && (ui32Idx > 1)) + { + // + // Back up one character. + // + ui32Idx--; + } + + // + // Now we are either at the lowest level separator in the + // current path, or at the beginning of the string (root). + // So set the new end of string here, effectively removing + // that last part of the path. + // + g_pcTmpBuf[ui32Idx] = 0; + } + + // + // Otherwise this is just a normal path name from the current + // directory, and it needs to be appended to the current path. + // + else + { + // + // Test to make sure that when the new additional path is + // added on to the current path, there is room in the buffer + // for the full new path. It needs to include a new separator, + // and a trailing null character. + // + if(strlen(g_pcTmpBuf) + strlen(pcDirectory) + 2 > sizeof(g_pcCwdBuf)) + { + return(FR_INVALID_OBJECT); + } + + // + // The new path is okay, so add the separator and then append + // the new directory to the path. + // + else + { + // + // If not already at the root level, then append a / + // + if(strcmp(g_pcTmpBuf, "/")) + { + strcat(g_pcTmpBuf, "/"); + } + + // + // Append the new directory to the path. + // + strcat(g_pcTmpBuf, pcDirectory); + } + } + + // + // At this point, a candidate new directory path is in g_pcTmpBuf. + // Try to open it to make sure it is valid. + // + fresult = f_opendir(&g_sDirObject, g_pcTmpBuf); + + // + // This was a valid path, so copy it into the CWD. + // + if(fresult == FR_OK) + { + strncpy(g_pcCwdBuf, g_pcTmpBuf, sizeof(g_pcCwdBuf)); + } + + // + // Return success. + // + return(fresult); +} + +//***************************************************************************** +// +// Fill the audio buffer with data from the open file. +// +//***************************************************************************** +static void +FillAudioBuffer(void) +{ + uint32_t ui32Count, ui32Size; + uint8_t *pui8Read; + + // + // If already full return. + // + if(g_ui32ValidBytes == g_ui32BufferSize) + { + return; + } + + // + // Snap shot the read pointer since it might change while we are filling + // the buffer. If the read pointer moved due to an interrupt we will + // get the update on the next call to this function. + // + pui8Read = (uint8_t *)g_pui8Read; + + // + // If write is ahead of read then fill to the end of the buffer if + // possible. + // + if(pui8Read <= g_pui8Write) + { + // + // Calculate the amount of space we have. + // + ui32Size = g_ui32BufferSize - + (uint32_t)(g_pui8Write - g_pui8AudioBuffer); + ui32Count = WavRead(&g_sWavFile, (uint8_t *)g_pui8Write, ui32Size); + + g_pui8Write += ui32Count; + IntMasterDisable(); + g_ui32ValidBytes += ui32Count; + IntMasterEnable(); + + if(g_pui8Write == (g_pui8AudioBuffer + g_ui32BufferSize)) + { + g_pui8Write = g_pui8AudioBuffer; + } + + ui32Size = pui8Read - g_pui8AudioBuffer; + + if(ui32Size) + { + ui32Count = WavRead(&g_sWavFile, (uint8_t *)g_pui8Write, ui32Size); + g_pui8Write += ui32Count; + IntMasterDisable(); + g_ui32ValidBytes += ui32Count; + IntMasterEnable(); + } + } + + // + // If read is now ahead of write then fill to the read pointer. + // + if(pui8Read > g_pui8Write) + { + // + // Calculate the amount of space we have. + // + ui32Size = (uint32_t)(pui8Read - g_pui8Write); + ui32Count = WavRead(&g_sWavFile, (uint8_t *)g_pui8Write, ui32Size); + + g_pui8Write += ui32Count; + + IntMasterDisable(); + g_ui32ValidBytes += ui32Count; + IntMasterEnable(); + } +} + +//***************************************************************************** +// +// This function handles the callback from the USB audio device when a buffer +// has been played or a new buffer has been received. +// +//***************************************************************************** +static void +USBAudioOutCallback(void *pvBuffer, uint32_t ui32Event, uint32_t ui32Value) +{ + // + // If a buffer has been played then schedule a new one to play. + // + if((ui32Event == USB_EVENT_TX_COMPLETE) && (g_ePlayState == AUDIO_PLAYING)) + { + // + // Indicate that a transfer was complete so that the non-interrupt + // code can read in more data from the file. + // + HWREGBITW(&g_ui32Flags, FLAGS_TX_COMPLETE) = 1; + + // + // Increment the read pointer. + // + g_pui8Read += g_ui32TransferSize; + + // + // Remove the specified number of bytes from the buffer. + // + if(g_ui32ValidBytes > g_ui32TransferSize) + { + g_ui32ValidBytes -= g_ui32TransferSize; + } + else + { + g_ui32ValidBytes = 0; + } + + // + // Wrap the read pointer if necessary. + // + if(g_pui8Read >= (g_pui8AudioBuffer + g_ui32BufferSize)) + { + g_pui8Read = g_pui8AudioBuffer; + } + + // + // Increment the number of bytes that have been played. + // + g_ui32BytesPlayed += g_ui32TransferSize; + + // + // Schedule a new USB audio buffer to be transmitted to the USB + // audio device. + // + USBSoundBufferOut((uint8_t *)g_pui8Read, g_ui32TransferSize, + USBAudioOutCallback); + } +} + +//***************************************************************************** +// +// This is the callback for the play/pause button. +// +//***************************************************************************** +static void +PlayPause(tWidget *psWidget) +{ + int16_t i16Select; + + // + // If we are stopped, then start playing. + // + if(g_ePlayState == AUDIO_STOPPED) + { + // + // Get the current selection from the list box. + // + i16Select = ListBoxSelectionGet(&g_sDirList); + + // + // See if this is a valid .wav file that can be opened. + // + if(WavOpen(g_pcFilenames[i16Select], &g_sWavFile) == 0) + { + // + // Initialize the read and write pointers. + // + g_pui8Read = g_pui8AudioBuffer; + g_pui8Write = g_pui8AudioBuffer; + g_ui32ValidBytes = 0; + + // + // Fill the audio buffer from the file. + // + FillAudioBuffer(); + + // + // Start the audio playback. + // + USBSoundBufferOut((uint8_t *)g_pui8Read, g_ui32TransferSize, + USBAudioOutCallback); + // + // Indicate that wave play back should start. + // + g_ePlayState = AUDIO_PLAYING; + + // + // Change the button to indicate pause. + // + PushButtonTextSet(&g_sPlayPause, g_pcPause); + WidgetPaint((tWidget *)&g_sPlayPause); + } + else + { + // + // Play was pressed on an invalid file. + // + CanvasTextSet(&g_sStatusText, "Invalid wav format "); + WidgetPaint((tWidget *)&g_sPlayPause); + + return; + } + + // + // Initialize the read and write pointers. + // + g_pui8Read = g_pui8AudioBuffer; + g_pui8Write = g_pui8AudioBuffer; + g_ui32ValidBytes = 0; + + // + // Fill the audio buffer from the file. + // + FillAudioBuffer(); + + // + // Start the audio playback. + // + USBSoundBufferOut((uint8_t *)g_pui8Read, g_ui32TransferSize, + USBAudioOutCallback); + } + else if(g_ePlayState == AUDIO_PLAYING) + { + // + // Now switching to a paused state, so change the button to say play. + // + PushButtonTextSet(&g_sPlayPause, g_pcPlay); + WidgetPaint((tWidget *)&g_sPlayPause); + + g_ePlayState = AUDIO_PAUSED; + } + else if(g_ePlayState == AUDIO_PAUSED) + { + // + // Fill the audio buffer from the file. + // + FillAudioBuffer(); + + // + // Start the audio playback. + // + USBSoundBufferOut((uint8_t *)g_pui8Read, g_ui32TransferSize, + USBAudioOutCallback); + + // + // Now switching to a play state, so change the button to say paused. + // + PushButtonTextSet(&g_sPlayPause, g_pcPause); + WidgetPaint((tWidget *)&g_sPlayPause); + + g_ePlayState = AUDIO_PLAYING; + } +} + +//***************************************************************************** +// +// Stopped pressed so stop the wav playback. +// +//***************************************************************************** +static void +Stop(tWidget *psWidget) +{ + // + // Stop play back if we are playing. + // + if((g_ePlayState == AUDIO_PLAYING) || (g_ePlayState == AUDIO_PAUSED)) + { + WaveStop(); + } +} + +//***************************************************************************** +// +// This function is called to read the contents of the current directory on +// the SD card and fill the listbox containing the names of all files and +// directories. +// +//***************************************************************************** +static int +PopulateFileListBox(bool bRepaint) +{ + uint32_t ui32ItemCount; + FRESULT iFResult; + + // + // Empty the list box on the display. + // + ListBoxClear(&g_sDirList); + + // + // Make sure the list box will be redrawn next time the message queue + // is processed. + // + if(bRepaint) + { + WidgetPaint((tWidget *)&g_sDirList); + } + + // + // Open the current directory for access. + // + iFResult = f_opendir(&g_sDirObject, g_pcCwdBuf); + + // + // Check for error and return if there is a problem. + // + if(iFResult != FR_OK) + { + // + // Change the text to reflect the change. + // + CanvasTextSet(&g_sStatusText, g_pcDirError); + WidgetPaint((tWidget *)&g_sStatusText); + return(iFResult); + } + + // + // If not at the root then add the ".." entry. + // + if(g_pcCwdBuf[1] != 0) + { + g_pcFilenames[0][0] = '.'; + g_pcFilenames[0][1] = '.'; + g_pcFilenames[0][2] = 0; + ListBoxTextAdd(&g_sDirList, g_pcFilenames[0]); + ui32ItemCount = 1; + } + else + { + ui32ItemCount = 0; + } + + // + // Enter loop to enumerate through all directory entries. + // + for(;;) + { + // + // Read an entry from the directory. + // + iFResult = f_readdir(&g_sDirObject, &g_sFileInfo); + + // + // Check for error and return if there is a problem. + // + if(iFResult != FR_OK) + { + // + // Change the text to reflect the change. + // + CanvasTextSet(&g_sStatusText, g_pcDirError); + WidgetPaint((tWidget *)&g_sStatusText); + return(iFResult); + } + + // + // If the file name is blank, then this is the end of the + // listing. + // + if(!g_sFileInfo.fname[0]) + { + break; + } + + // + // Add the information as a line in the listbox widget. + // + if(ui32ItemCount < NUM_LIST_STRINGS) + { + if(g_sFileInfo.fattrib & AM_DIR) + { + usnprintf(g_pcFilenames[ui32ItemCount], + MAX_FILENAME_STRING_LEN, "+ %s", g_sFileInfo.fname); + } + else + { + ustrncpy(g_pcFilenames[ui32ItemCount], g_sFileInfo.fname, + MAX_FILENAME_STRING_LEN); + } + ListBoxTextAdd(&g_sDirList, g_pcFilenames[ui32ItemCount]); + } + + // + // Move to the next entry in the item array we use to populate the + // list box. + // + ui32ItemCount++; + } + + // + // Made it to here, return with no errors. + // + return(0); +} + +//***************************************************************************** +// +// The listbox widget callback function. +// +// This function is called whenever someone changes the selected entry in the +// listbox containing the files and directories found in the current directory. +// +//***************************************************************************** +void OnListBoxChange(tWidget *psWidget, int16_t i16Selected) +{ + int16_t i16Sel; + + // + // Get the current selection from the list box. + // + i16Sel = ListBoxSelectionGet(&g_sDirList); + + // + // Is there any selection? + // + if(i16Sel == -1) + { + return; + } + else + { + // + // Is the selection a directory name. + // + if(g_pcFilenames[i16Sel][0] == '+') + { + if((g_ePlayState != AUDIO_PLAYING) && + (g_ePlayState != AUDIO_PAUSED)) + { + CanvasTextSet(&g_sWaveInfoFileName, ""); + CanvasTextSet(&g_sWaveInfoSample, ""); + g_pcTime[0] = 0; + } + + if(ChangeToDirectory(&g_pcFilenames[i16Sel][2]) == FR_OK) + { + PopulateFileListBox(true); + } + } + else if((g_pcFilenames[i16Sel][0] == '.') && + (g_pcFilenames[i16Sel][1] == '.')) + { + // + // If this was the .. selection then move up a directory. + // + if(ChangeToDirectory("..") == FR_OK) + { + PopulateFileListBox(true); + } + + if((g_ePlayState != AUDIO_PLAYING) && + (g_ePlayState != AUDIO_PAUSED)) + { + CanvasTextSet(&g_sWaveInfoFileName, ""); + CanvasTextSet(&g_sWaveInfoSample, ""); + g_pcTime[0] = 0; + } + } + else + { + // + // This was a normal file selections so see if it is a wav file. + // + CanvasTextSet(&g_sWaveInfoFileName, g_pcFilenames[i16Sel]); + + if((g_ePlayState == AUDIO_PLAYING) || + (g_ePlayState == AUDIO_PAUSED)) + { + WaveStop(); + } + + if(WavOpen(g_pcFilenames[i16Sel], &g_sWavFile) == 0) + { + // + // Read the .wav file format. + // + WavGetFormat(&g_sWavFile, &g_sWavHeader); + + // + // Print the formatted string so that it can be + // displayed. + // + usprintf(g_pcFormat, "%d Hz %d bit ", + g_sWavHeader.ui32SampleRate, + g_sWavHeader.ui16BitsPerSample); + + // + // Concatenate the number of channels. + // + if(g_sWavHeader.ui16NumChannels == 1) + { + strcat(g_pcFormat, "Mono"); + } + else + { + strcat(g_pcFormat, "Stereo"); + } + + CanvasTextSet(&g_sWaveInfoSample, g_pcFormat); + + // + // Calculate the minutes and seconds in the file. + // + g_ui16Seconds = g_sWavHeader.ui32DataSize / + g_sWavHeader.ui32AvgByteRate; + g_ui16Minutes = g_ui16Seconds / 60; + g_ui16Seconds -= g_ui16Minutes * 60; + + // + // Close the file, it will be re-opened on play. + // + WavClose(&g_sWavFile); + + // + // Update the file time information. + // + DisplayTime(1); + + // + // Close the file, it will be re-opened on play. + // + WavClose(&g_sWavFile); + } + else + { + CanvasTextSet(&g_sWaveInfoSample, ""); + g_pcTime[0] = 0; + WidgetPaint((tWidget *)&g_sWaveInfoTime); + } + } + + // + // Update the file name and wav file information + // + WidgetPaint((tWidget *)&g_sWaveInfoFileName); + WidgetPaint((tWidget *)&g_sWaveInfoSample); + WidgetPaint((tWidget *)&g_sWaveInfoTime); + } +} + +//***************************************************************************** +// +// This is the handler for this SysTick interrupt. FatFs requires a +// timer tick every 10ms for internal timing purposes. +// +//***************************************************************************** +void +SysTickHandler(void) +{ + // + // Call the FatFs tick timer. + // + disk_timerproc(); +} + +//***************************************************************************** +// +// Initializes the file system module. +// +// \param None. +// +// This function initializes the third party FAT implementation. +// +// \return Returns \e true on success or \e false on failure. +// +//***************************************************************************** +static bool +FileInit(void) +{ + // + // Mount the file system, using logical disk 0. + // + if(f_mount(0, &g_sFatFs) != FR_OK) + { + return(false); + } + return(true); +} + +//***************************************************************************** +// +// This function handled global level events for the USB host audio. This +// function was passed into the USBSoundInit() function. +// +//***************************************************************************** +static void +AudioEvent(uint32_t ui32Event, uint32_t ui32Param) +{ + switch(ui32Event) + { + case SOUND_EVENT_READY: + { + // + // Flag that a new audio device is present. + // + HWREGBITW(&g_ui32Flags, FLAGS_DEVICE_CONNECT) = 1; + + // + // Change the text to reflect the change. + // + CanvasTextSet(&g_sStatusText, "Ready "); + WidgetPaint((tWidget *)&g_sStatusText); + + break; + } + case SOUND_EVENT_DISCONNECT: + { + // + // If playing return the button text to play. + // + if(g_ePlayState == AUDIO_PLAYING) + { + PushButtonTextSet(&g_sPlayPause, g_pcPlay); + WidgetPaint((tWidget *)&g_sPlayPause); + + WaveStop(); + } + + // + // Device is no longer present. + // + HWREGBITW(&g_ui32Flags, FLAGS_DEVICE_CONNECT) = 0; + g_ePlayState = AUDIO_NONE; + + // + // Change the text to reflect the change. + // + CanvasTextSet(&g_sStatusText, g_pcNoDevice); + WidgetPaint((tWidget *)&g_sStatusText); + + break; + } + case SOUND_EVENT_UNKNOWN_DEV: + { + if(ui32Param == 1) + { + // + // . + // + CanvasTextSet(&g_sStatusText, g_pcUnknownDevice); + } + else + { + // + // Unknown device disconnected. + // + CanvasTextSet(&g_sStatusText, g_pcNoDevice); + } + WidgetPaint((tWidget *)&g_sStatusText); + + break; + } + default: + { + break; + } + } +} + +//***************************************************************************** +// +// The program main function. It performs initialization, then handles wav +// file playback. +// +//***************************************************************************** +int +main(void) +{ + uint32_t ui32Temp; + uint32_t ui32Retcode, ui32PLLRate; +#ifdef USE_ULPI + uint32_t ui32Setting; +#endif + + // + // Set the system clock to run at 120MHz from the PLL. + // + g_ui32SysClock = MAP_SysCtlClockFreqSet((SYSCTL_XTAL_25MHZ | + SYSCTL_OSC_MAIN | SYSCTL_USE_PLL | + SYSCTL_CFG_VCO_480), 120000000); + + // + // Configure the device pins. + // + PinoutSet(); + +#ifdef USE_ULPI + // + // Switch the USB ULPI Pins over. + // + USBULPIPinoutSet(); + + // + // Enable USB ULPI with high speed support. + // + ui32Setting = USBLIB_FEATURE_ULPI_HS; + USBOTGFeatureSet(0, USBLIB_FEATURE_USBULPI, &ui32Setting); + + // + // Setting the PLL frequency to zero tells the USB library to use the + // external USB clock. + // + ui32PLLRate = 0; +#else + // + // Save the PLL rate used by this application. + // + ui32PLLRate = 480000000; +#endif + + // + // Configure SysTick for a 100Hz interrupt. + // + ROM_SysTickPeriodSet(g_ui32SysClock / TICKS_PER_SECOND); + ROM_SysTickEnable(); + ROM_SysTickIntEnable(); + + // + // Enable Interrupts + // + ROM_IntMasterEnable(); + + // + // Initialize the display driver. + // + Kentec320x240x16_SSD2119Init(g_ui32SysClock); + + // + // Initialize the graphics context. + // + GrContextInit(&g_sContext, &g_sKentec320x240x16_SSD2119); + + // + // Draw the application frame. + // + FrameDraw(&g_sContext, "usb-host-audio"); + + // + // Initialize the touch screen driver. + // + TouchScreenInit(g_ui32SysClock); + + // + // Set the touch screen event handler. + // + TouchScreenCallbackSet(WidgetPointerMessage); + + WidgetAdd(WIDGET_ROOT, (tWidget *)&g_sDirList); + WidgetAdd(WIDGET_ROOT, (tWidget *)&g_sStatusPanel); + WidgetAdd(WIDGET_ROOT, (tWidget *)&g_sWaveInfoBackground); + + // + // Issue the initial paint request to the widgets then immediately call + // the widget manager to process the paint message. This ensures that the + // display is drawn as quickly as possible and saves the delay we would + // otherwise experience if we processed the paint message after mounting + // and reading the SD card. + // + WidgetPaint(WIDGET_ROOT); + WidgetMessageQueueProcess(); + + // + // Determine whether or not an SD Card is installed. If not, print a + // warning and have the user install one and restart. + // + ui32Retcode = disk_initialize(0); + + if(ui32Retcode != RES_OK) + { + CanvasTextSet(&g_sStatusText, "File system error! "); + WidgetPaint((tWidget *)&g_sStatusText); + while(1); + } + else + { + // + // Mount the file system, using logical disk 0. + // + f_mount(0, &g_sFatFs); + + if(!FileInit()) + { + CanvasTextSet(&g_sStatusText, "File system error! "); + WidgetPaint((tWidget *)&g_sStatusText); + while(1); + } + } + + // + // Not playing anything right now. + // + g_ui32Flags = 0; + g_ePlayState = AUDIO_NONE; + + PopulateFileListBox(true); + + // + // Tell the USB library the CPU clock and the PLL frequency. This is a + // new requirement for TM4C129 devices. + // + USBHCDFeatureSet(0, USBLIB_FEATURE_CPUCLK, &g_ui32SysClock); + USBHCDFeatureSet(0, USBLIB_FEATURE_USBPLL, &ui32PLLRate); + + // + // Configure the USB host output. + // + USBSoundInit(0, AudioEvent); + + // + // Enter an (almost) infinite loop for reading and processing commands from + // the user. + // + while(1) + { + // + // On connect change the device state to ready. + // + if(HWREGBITW(&g_ui32Flags, FLAGS_DEVICE_CONNECT)) + { + HWREGBITW(&g_ui32Flags, FLAGS_DEVICE_CONNECT) = 0; + + // + // Getting here means the device is ready. + // Reset the CWD to the root directory. + // + g_pcCwdBuf[0] = '/'; + g_pcCwdBuf[1] = 0; + + // + // Initiate a directory change to the root. This will + // populate a menu structure representing the root directory. + // + if(ChangeToDirectory("/") == FR_OK) + { + // + // Request a repaint so the file menu will be shown + // + WidgetPaint(WIDGET_ROOT); + } + else + { + CanvasTextSet(&g_sStatusText, + "Error accessing root directory "); + WidgetPaint((tWidget *)&g_sStatusText); + while(1); + } + + // + // Attempt to set the audio format to 44100 16 bit stereo by + // default otherwise try 48000 16 bit stereo. + // + if(USBSoundOutputFormatSet(44100, 16, 2) == 0) + { + ui32Temp = 44100; + } + else if(USBSoundOutputFormatSet(48000, 16, 2) == 0) + { + ui32Temp = 48000; + } + else + { + ui32Temp = 0; + } + + // + // If the audio device was support put the sample rate in the + // status line. + // + if(ui32Temp != 0) + { + // + // Calculate the number of bytes per USB frame. + // + g_ui32TransferSize = (ui32Temp * 4) / 1000; + + // + // Calculate the size of the audio buffer. + // + g_ui32BufferSize = AUDIO_BUFFERS * g_ui32TransferSize; + + // + // Print the time string in the format mm.ss/mm.ss + // + if(ui32Temp == 44100) + { + CanvasTextSet(&g_sStatusText, "44.1 kHz Ready "); + } + else if(ui32Temp == 48000) + { + CanvasTextSet(&g_sStatusText, "48 kHz Ready "); + } + + g_ePlayState = AUDIO_STOPPED; + } + else + { + CanvasTextSet(&g_sStatusText, "Unsupported Audio Device "); + g_ePlayState = AUDIO_NONE; + } + WidgetPaint((tWidget *)&g_sStatusText); + } + + // + // Handle the case when the wave file is playing. + // + if(g_ePlayState == AUDIO_PLAYING) + { + // + // Handle the transmit complete event. + // + if(HWREGBITW(&g_ui32Flags, FLAGS_TX_COMPLETE)) + { + // + // Clear the transmit complete flag. + // + HWREGBITW(&g_ui32Flags, FLAGS_TX_COMPLETE) = 0; + + // + // If there is space available then fill the buffer. + // + FillAudioBuffer(); + + // + // If we run out of valid bytes then stop the playback. + // + if(g_ui32ValidBytes == 0) + { + // + // No more data or error so stop playing. + // + WaveStop(); + } + + // + // Update the real display time. + // + DisplayTime(0); + } + } + + // + // Need to periodically call the USBSoundMain() routine so that + // non-interrupt gets a chance to run. + // + USBSoundMain(); + + // + // Process any messages in the widget message queue. + // + WidgetMessageQueueProcess(); + } +} + -- cgit v1.3.1