TMS320F28386D: I'm testing DMA (Direct Memory Access).

Tool/software:

Hello experts

I'm testing DMA block. 

I use 3 DMA Channels.

My source Address are same. ( the name is "fsiRxDataBuf" );

I can get CPU1_FSI_PACKETs_RX from fsiRxDataBuf.

but CPU1_FSI_PACKETs_RX2 and CPU1_FSI_PACKETs_RX3 buffers are not valid.

I want to select my dest buffer. 

Can I change the dest buffer using DMA?

Thank you for reading.

TypeNumFSI = frameDataRX[0] & 0x0F00;

switch(TypeNumFSI){
case 0x0000: 
DMA_startChannel(DMA_CH1_BASE);
DMA_forceTrigger(DMA_CH1_BASE);
break;

case 0x0100: 
DMA_startChannel(DMA_CH2_BASE);
DMA_forceTrigger(DMA_CH2_BASE);
break;

case 0x0200: 
DMA_startChannel(DMA_CH3_BASE);
DMA_forceTrigger(DMA_CH3_BASE);
break;
}

My init code is:

void initDMA1(void)
{

DMA_ConfigParams transfParams;
const void *destAddr;
const void *srcAddr;
srcAddr = (const void *)fsiRxDataBuf;
destAddr = (const void *)CPU1_FSI_PACKETs_RX;

//
// configure DMA CH1
//
transfParams.transferTrigger = DMA_TRIGGER_SOFTWARE;
transfParams.interruptMode = DMA_INT_AT_END;
transfParams.enableInterrupt = 1;
transfParams.configSize = DMA_CFG_SIZE_16BIT;
transfParams.transferMode = DMA_CFG_ONESHOT_DISABLE;
transfParams.reinitMode = DMA_CFG_CONTINUOUS_DISABLE;
transfParams.burstSize = 8;
transfParams.transferSize = 6; //48/8
transfParams.srcWrapSize = 0xFFFF;
transfParams.destWrapSize = 0xFFFF;
transfParams.destAddr = (uint32_t)destAddr;
transfParams.srcAddr = (uint32_t)srcAddr;
transfParams.srcBurstStep = 1;
transfParams.destBurstStep = 1;
transfParams.srcTransferStep = 1;
transfParams.destTransferStep = 1;
transfParams.srcWrapStep = 0;
transfParams.destWrapStep = 0;

DMA_configChannel(DMA_CH1_BASE, &transfParams);
}

void initDMA2(void)
{

DMA_ConfigParams transfParams;
const void *destAddr;
const void *srcAddr;
srcAddr = (const void *)fsiRxDataBuf;
destAddr = (const void *)CPU1_FSI_PACKETs_RX2;

//
// configure DMA CH2
//
transfParams.transferTrigger = DMA_TRIGGER_SOFTWARE;
transfParams.interruptMode = DMA_INT_AT_END;
transfParams.enableInterrupt = 1;
transfParams.configSize = DMA_CFG_SIZE_16BIT;
transfParams.transferMode = DMA_CFG_ONESHOT_DISABLE;
transfParams.reinitMode = DMA_CFG_CONTINUOUS_DISABLE;;
transfParams.burstSize = 8;
transfParams.transferSize = 6; //48/8
transfParams.srcWrapSize = 0xFFFF;
transfParams.destWrapSize = 0xFFFF;
transfParams.destAddr = (uint32_t)destAddr;
transfParams.srcAddr = (uint32_t)srcAddr;
transfParams.srcBurstStep = 1;
transfParams.destBurstStep = 1;
transfParams.srcTransferStep = 1;
transfParams.destTransferStep = 1;
transfParams.srcWrapStep = 0;
transfParams.destWrapStep = 0;

DMA_configChannel(DMA_CH2_BASE, &transfParams);
}

void initDMA3(void)
{

DMA_ConfigParams transfParams;
const void *destAddr;
const void *srcAddr;
srcAddr = (const void *)fsiRxDataBuf;
destAddr = (const void *)CPU1_FSI_PACKETs_RX3;

//
// configure DMA CH3
//
transfParams.transferTrigger = DMA_TRIGGER_SOFTWARE;
transfParams.interruptMode = DMA_INT_AT_END;
transfParams.enableInterrupt = 1;
transfParams.configSize = DMA_CFG_SIZE_16BIT;
transfParams.transferMode = DMA_CFG_ONESHOT_DISABLE;
transfParams.reinitMode = DMA_CFG_CONTINUOUS_DISABLE;;
transfParams.burstSize = 8;
transfParams.transferSize = 6; //48/8
transfParams.srcWrapSize = 0xFFFF;
transfParams.destWrapSize = 0xFFFF;
transfParams.destAddr = (uint32_t)destAddr;
transfParams.srcAddr = (uint32_t)srcAddr;
transfParams.srcBurstStep = 1;
transfParams.destBurstStep = 1;
transfParams.srcTransferStep = 1;
transfParams.destTransferStep = 1;
transfParams.srcWrapStep = 0;
transfParams.destWrapStep = 0;

DMA_configChannel(DMA_CH3_BASE, &transfParams);
}