Audio Loopback functional on MCU Cortex R5F.

Audio inputs through PCM3168A ADC to MCU Cortex R5F, and
then is routed to PCM3168A DAC's.
Line input -> J38 jack on motherboard.
Output -> Top jack on J41.

Attempted to use Board library for Board_control() setting
the Audio Codec Reset Pin (via I2C3), but was not able to
successfully get this to work.
Instead, the application opens and closes the I2C3 handle,
and needed to set i2cCfg.baseAddr to CSL_I2C3_CFG_BASE to
get this functional.

2 files changed, 31 insertions, 9 deletions

diff --git a/example/j721e/src/audio_evmInit.c b/example/j721e/src/audio_evmInit.c
index cdeec61..8bac6fe 100644
--- a/example/j721e/src/audio_evmInit.c
+++ b/example/j721e/src/audio_evmInit.c
@@ -319,6 +319,8 @@ void McASP_Enable(void)
     MMR_lock_one(lock0, lock1);
 }
 
+//#define USE_BOARD_LIB_FOR_I2C_HANDLE
+
 extern I2C_Handle gIoExpI2cHandle;
 void IoExpanderConfig(void)
 {
@@ -344,7 +346,6 @@ void IoExpanderConfig(void)
     {
             MCASP_log("I2C IO Exp Init failed\n");
         }
-
     /* Set MCASP/TRACE_MUX_S1 to HIGH */
     ioExpData |= 0x04U;
 
@@ -356,13 +357,14 @@ void IoExpanderConfig(void)
     {
             MCASP_log("I2C IO Exp Init failed\n");
         }
-
+#if !defined(USE_BOARD_LIB_FOR_I2C_HANDLE)
     /* Configure I2C3 needed for IOEXP_DEVICE3 */
     I2C_Params_init(&i2cParams);
     i2cParams.transferMode = I2C_MODE_BLOCKING;
 
     I2C_socGetInitCfg(3, &i2cCfg);
-    enableIntrTmp = i2cCfg.enableIntr;
+    enableIntrTmp     = i2cCfg.enableIntr;
+    i2cCfg.baseAddr   = CSL_I2C3_CFG_BASE;
     i2cCfg.enableIntr = false;
     I2C_socSetInitCfg(3, &i2cCfg);
 
@@ -394,7 +396,25 @@ void IoExpanderConfig(void)
     {
             MCASP_log("I2C IO Exp Init failed\n");
         }
-
+#else
+    Board_IoExpCfg_t ioExpCfg;
+    ioExpCfg.slaveAddr   = BOARD_I2C_IOEXP_DEVICE3_ADDR;
+    ioExpCfg.i2cInst     = BOARD_I2C_IOEXP_DEVICE3_INSTANCE;
+    ioExpCfg.socDomain   = BOARD_SOC_DOMAIN_MAIN;
+    ioExpCfg.enableIntr  = false;
+    ioExpCfg.ioExpType   = ONE_PORT_IOEXP;
+    ioExpCfg.portNum     = PORTNUM_0;
+    ioExpCfg.pinNum      = PIN_NUM_0;
+    ioExpCfg.signalLevel = GPIO_SIGNAL_LEVEL_HIGH;
+
+    //UART_printf("IoExpanderConfig: About to call Board_control, BOARD_I2C_IOEXP_DEVICE3_ADDR = 0x%x, " \
+    //            "BOARD_I2C_IOEXP_DEVICE3_INSTANCE = %d, PORTNUM_0 = %d, PIN_NUM_0 = %d, GPIO_SIGNAL_LEVEL_HIGH = %d\n",
+    //            BOARD_I2C_IOEXP_DEVICE3_ADDR,
+    //            BOARD_I2C_IOEXP_DEVICE3_INSTANCE, PORTNUM_0, PIN_NUM_0,
+    //            GPIO_SIGNAL_LEVEL_HIGH);
+    Board_control(BOARD_CTRL_CMD_SET_IO_EXP_PIN_OUT, (void *)&ioExpCfg);
+#endif
+#if !defined(USE_BOARD_LIB_FOR_I2C_HANDLE)
     /* Close I2C3 */
     I2C_close(handle);
 
@@ -404,6 +424,7 @@ void IoExpanderConfig(void)
 
     /* Restore global IO Exp handle */
     gIoExpI2cHandle = tmpHandle;
+#endif
 }
 
 /*
diff --git a/example/src/audioSample_io.c b/example/src/audioSample_io.c
index dcd8f6e..fe92586 100644
--- a/example/src/audioSample_io.c
+++ b/example/src/audioSample_io.c
@@ -124,7 +124,8 @@ extern HeapMem_Handle myHeap;
  * In addition, the buffer should be of a size multiple of 128 bytes for
  * the cache work optimally on the C6x.
  */
-#define BUFLEN                  (128) /* number of samples per serializer in the frame  */
+//#define BUFLEN                  (128) /* number of samples per serializer in the frame  */
+#define BUFLEN                  (512) /* number of samples per serializer in the frame  */
 #define BUFALIGN                128 /* alignment of buffer for use of L2 cache */
 
 /* This is the number of buffers used by the application to be issued and reclaimed 
@@ -740,10 +741,10 @@ Udma_DrvHandle McaspApp_udmaInit(Mcasp_HwInfo *cfg)
         instId = UDMA_INST_ID_MAIN_0;
 
         UdmaInitPrms_init(instId, &initPrms);
-        //initPrms.rmInitPrms.startRxCh = 132U;
-        //initPrms.rmInitPrms.numRxCh   = 1;
-        //initPrms.rmInitPrms.startTxCh = 132U;
-        //initPrms.rmInitPrms.numTxCh   = 1;
+        initPrms.rmInitPrms.startRxCh = 132U;
+        initPrms.rmInitPrms.numRxCh   = 1;
+        initPrms.rmInitPrms.startTxCh = 132U;
+        initPrms.rmInitPrms.numTxCh   = 1;
         retVal = Udma_init(&gUdmaDrvObj, &initPrms);
         if(UDMA_SOK == retVal)
         {