cc2640r2f i2s的使用問題

各位好：

在2640r2f调试音频wm8978芯片的时候碰到问题，使用协议栈1.4

示波器看bclk wclk sdin （sdin为wm8978 i2s数据输出）均有输出波形，但是我在回调中一直没有进去，使用的是i2s的原例程移植，附上部分初始化代码以及操作过程，感谢！！

Viki Shi：

协议栈太旧了，现在已经是3.20版本了，修复了以前的很多bug，建议在新版本协议栈上测试

admin admin1：

回复 Viki Shi:

你好，谢谢回复

我把协议栈更新成3.2版本的，使用例程，但是在read callback中我打了断点，刚开始运行时会进去几次，后面就进不去了。

另外，这里readBuf的数据长度如果像例程那样，会一直报ICALL error，这个是否是内存设置问题，如果是又如何避免这个错误？

附上现在使用的方式，非常期望解答，感谢！

static I2S_Handle i2sHandle;
static I2S_Config i2sConfig;

static uint16_t readBuf1[50]; // the data read will end up in this buffer 500
static uint16_t readBuf2[50]; // the data read will end up in this buffer 500
static uint16_t readBuf3[50]; // the data read will end up in this buffer 500
static uint16_t writeBuf1[25] = {0}; // this buffer will be sent out 250
static uint16_t writeBuf2[25] = {0}; // this buffer will be sent out 250
static uint16_t writeBuf3[25] = {0}; // this buffer will be sent out 250

static I2S_Transaction i2sRead1;
static I2S_Transaction i2sRead2;
static I2S_Transaction i2sRead3;
static I2S_Transaction i2sWrite1;
static I2S_Transaction i2sWrite2;
static I2S_Transaction i2sWrite3;

List_List i2sReadList;
List_List i2sWriteList;

static volatile bool readStopped = (bool)true;
static volatile bool writeStopped = (bool)true;

static void writeCallbackFxn(I2S_Handle handle, int_fast16_t status, I2S_Transaction *transactionPtr) {

    if(status & I2S_ALL_TRANSACTIONS_SUCCESS){

        // Note: Here we do not queue new transfers or set a new queue-head.
        // The driver will stop sending out data on its own.
        writeStopped = (bool)true;
    }
}

static void readCallbackFxn(I2S_Handle handle, int_fast16_t status, I2S_Transaction *transactionPtr) {

    if(status & I2S_ALL_TRANSACTIONS_SUCCESS){

        // Note: Here we do not queue new transfers or set a new queue-head.
        // The driver will stop receiving data on its own.
        readStopped = (bool)true;
    }
}

static void errCallbackFxn(I2S_Handle handle, int_fast16_t status, I2S_Transaction *transactionPtr) {

    // Handle the I2S error
}

uint8_t wm8978_i2s_init()
{
      I2S_Params i2sParams;

    I2S_init();

    // Initialize I2S opening parameters
    I2S_Params_init(&i2sParams);
    i2sParams.fixedBufferLength     =  50;//500; // fixedBufferLength is the greatest common
                                            // divisor of all the different buffers
                                            // (here buffers' size are 500 and 1000 bytes)
    i2sParams.writeCallback         =  writeCallbackFxn ;
    i2sParams.readCallback          =  readCallbackFxn ;
    i2sParams.errorCallback         =  errCallbackFxn;
    i2sParams.samplingEdge          = I2S_SAMPLING_EDGE_FALLING;
    i2sParams.SD1Use = I2S_SD1_INPUT;
    i2sParams.SD1Channels = I2S_CHANNELS_MONO;
    i2sParams.SD0Use = I2S_SD0_OUTPUT;
    i2sParams.SD0Channels = I2S_CHANNELS_MONO;
    i2sParams.phaseType = I2S_PHASE_TYPE_DUAL;
    i2sParams.fixedBufferLength = 2;
    i2sParams.isMSBFirst = true;
    i2sParams.moduleRole = I2S_MASTER;
    i2sParams.memorySlotLength = I2S_MEMORY_LENGTH_16BITS;        
    i2sParams.beforeWordPadding = 1;
    i2sParams.afterWordPadding  =1;
    i2sParams.bitsPerWord = 16;
    
    i2sHandle = I2S_open(Board_I2S0, &i2sParams);

    // Initialize the read-transactions
    I2S_Transaction_init(&i2sRead1);
    I2S_Transaction_init(&i2sRead2);
    I2S_Transaction_init(&i2sRead3);
    i2sRead1.bufPtr            = readBuf1;
    i2sRead2.bufPtr            = readBuf2;
    i2sRead3.bufPtr            = readBuf3;
    i2sRead1.bufSize           = sizeof(readBuf1);
    i2sRead2.bufSize           = sizeof(readBuf2);
    i2sRead3.bufSize           = sizeof(readBuf3);
    List_put(&i2sReadList, (List_Elem*)&i2sRead1);
    List_put(&i2sReadList, (List_Elem*)&i2sRead2);
    List_put(&i2sReadList, (List_Elem*)&i2sRead3);

    I2S_setReadQueueHead(i2sHandle, &i2sRead1);

    // Initialize the write-transactions
    I2S_Transaction_init(&i2sWrite1);
    I2S_Transaction_init(&i2sWrite2);
    I2S_Transaction_init(&i2sWrite3);
    i2sWrite1.bufPtr           = writeBuf1;
    i2sWrite2.bufPtr           = writeBuf2;
    i2sWrite3.bufPtr           = writeBuf3;
    i2sWrite1.bufSize          = sizeof(writeBuf1);
    i2sWrite2.bufSize          = sizeof(writeBuf2);
    i2sWrite3.bufSize          = sizeof(writeBuf3);
    List_put(&i2sWriteList, (List_Elem*)&i2sWrite1);
    List_put(&i2sWriteList, (List_Elem*)&i2sWrite2);
    List_put(&i2sWriteList, (List_Elem*)&i2sWrite3);

    I2S_setWriteQueueHead(i2sHandle, &i2sWrite1);

    I2S_startClocks(i2sHandle);
    I2S_startWrite(i2sHandle);
    I2S_startRead(i2sHandle);

    readStopped = (bool)false;
    writeStopped = (bool)false;
}