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我修改了wifi_audio_app程序，把编解码芯片改成wm8960，取消了里面的按键程序和网络传输。由于手头上只有一个板子，想修改程序实现一个板子上将输入的音频输出。在main函数中把跟网络和按键有关的函数都注释了，加了 g_ucMicStartFlag = 1;g_ucSpkrStartFlag = 1;g_loopback = 1。现在遇到的问题是播放没声音，调试的时候发现没进DMA中断函数。main函数如下：
{ long lRetVal = -1;
unsigned char RecordPlay;
BoardInit();
// Pinmux Configuration
//
PinMuxConfig();
g_ucMicStartFlag = 1;
g_ucSpkrStartFlag = 1;
g_loopback = 1;
{
pRecordBuffer = CreateCircularBuffer(RECORD_BUFFER_SIZE);
if(pRecordBuffer == NULL)
{
//UART_PRINT("Unable to Allocate Memory for Tx Buffer\n\r");
LOOP_FOREVER();
}
}
if(RecordPlay & I2S_MODE_TX)
{
pPlayBuffer = CreateCircularBuffer(PLAY_BUFFER_SIZE);
if(pPlayBuffer == NULL)
{
//UART_PRINT("Unable to Allocate Memory for Rx Buffer\n\r");
LOOP_FOREVER();
}
}
// Configure Audio Codec
//
WM8960_Init();
// Initialize the Audio(I2S) Module
//
// Initialize the DMA Module
// UDMAInit();
if(RecordPlay & I2S_MODE_TX)
{
UDMAChannelSelect(UDMA_CH5_I2S_TX, NULL);
SetupPingPongDMATransferRx(pPlayBuffer);
}
//if(RecordPlay & I2S_MODE_TX)
if(RecordPlay == I2S_MODE_RX_TX)
{
UDMAChannelSelect(UDMA_CH4_I2S_RX, NULL);
SetupPingPongDMATransferTx(pRecordBuffer);
}
// Setup the Audio In/Out
// lRetVal = AudioSetupDMAMode(DMAPingPongCompleteAppCB_opt, \
CB_EVENT_CONFIG_SZ, RecordPlay);
if(lRetVal < 0)
{
//ERR_PRINT(lRetVal);
LOOP_FOREVER();
} AudioCaptureRendererConfigure(AUDIO_CODEC_16_BIT, 16000, AUDIO_CODEC_STEREO, RecordPlay, 1);
// Start Audio Tx/Rx
// Audio_Start(RecordPlay);
// Start the simplelink thread
//
//lRetVal = VStartSimpleLinkSpawnTask(9);
//if(lRetVal < 0)
//{
// ERR_PRINT(lRetVal);
// LOOP_FOREVER();
//}
// Start the Network Task
// //lRetVal = osi_TaskCreate( Network, (signed char*)"NetworkTask",\
OSI_STACK_SIZE, NULL,
// 1, &g_NetworkTask );
//if(lRetVal < 0)
//{
// ERR_PRINT(lRetVal);
// LOOP_FOREVER();
//}
// Start the Control Task
// //lRetVal = ControlTaskCreate();
// if(lRetVal < 0)
//{
// ERR_PRINT(lRetVal);
// LOOP_FOREVER();
//}
// Start the Microphone Task
// lRetVal = osi_TaskCreate( Microphone,(signed char*)"MicroPhone", \
OSI_STACK_SIZE, NULL,
1, &g_MicTask );
if(lRetVal < 0)
{
//ERR_PRINT(lRetVal);
LOOP_FOREVER();
}
// Start the Speaker Task
//
lRetVal = osi_TaskCreate( Speaker, (signed char*)"Speaker",OSI_STACK_SIZE, \
NULL, 1, &g_SpeakerTask );
if(lRetVal < 0)
{
//ERR_PRINT(lRetVal);
LOOP_FOREVER();
}
// Start the task scheduler
//
osi_start(); }
Terry Han：
建议在仿真状态查看DMA的相关设置
//As don't have expertise on Audio codec, so it is best to post query in TI-Audio codec((AIC3254) ) forum to know how to configure PLL related configuration.//特别注意：//(1)PLAY_WATERMARK宏定义修改 reducing latency or delayed playback 回放延时问题–注意需要修改两个地方！network+pcm_handler// 详见(Wifi Audio App 8k sample rate delayed playback) https://e2e.ti.com/support/wireless_connectivity/simplelink_wifi_cc31xx_cc32xx/f/968/p/394864/1400223#1400223//(2)Unicast通过mDNS获取目的IP地址进行一对一的音频播放，而MuitiCast则采用mDNS的IP地址224.0.0.251进行广播音频数据//(3)mDNS使用服务器开启及客户端请求问题// 详见(CC3200 WiFi Audio App) http://e2e.ti.com/support/wireless_connectivity/simplelink_wifi_cc31xx_cc32xx/f/968/t/438276// 详见(How 2 CC3200s get each other IP address?) http://e2e.ti.com/support/wireless_connectivity/simplelink_wifi_cc31xx_cc32xx/f/968/p/400118/1415303#1415303//(4)回放模式设置// (Using Audio booster pack wifi demo app example CC3200) http://e2e.ti.com/support/wireless_connectivity/simplelink_wifi_cc31xx_cc32xx/f/968/t/390582#pi239031348=2&pi239031350=3//(5)操作步骤//<1>按下复位键(SW1）//<2>按下发射板的 SW3 键，绿灯长亮//<3>再按下接收板的 SW2 键，黄灯长亮，红灯也长亮//此时发射板的红灯及黄灯熄灭，绿灯常亮表示发射板正在传输音频，接收板绿灯熄灭，黄灯及红灯常亮表示正在接收音频//(6)关于双向音频流控制//(does the wifi audio sample really running on bidirectional?) http://e2e.ti.com/support/wireless_connectivity/simplelink_wifi_cc31xx_cc32xx/f/968/t/402341
