Hi,
I uploded on BOOST5545ULP board an example- AudioCodec_DMA. In this example are both codec and I2S interface prepared for stereo mode. But when I started tetsting board, playing stereo tests thru analog input, in my headphones I heard sound only in left channel. In right channel I could hear only noise. Changing the input channel caused only volume change in my left headphone. Rigth one was still noisy.
What could be a reason for this boards misbehavior?
Thank You in advance.
Hi Pawel,
The line-in loopback for C5545 BP is in C:\ti\c55_lp\c55_csl_3.08.01\demos\out_of_box\c5545\c5545bp_software_01.01.00.00\source_code\c55xx_diagnostics\board\diag\build\boostC5545\audio_line_in_loopback_test. The I2S example is designed for the C5515/C5517 EVM.
I have tested it on the C5545 BP. the line-in loopback works as expected (both channels).
Best regards,
Ming
The above example will loopback the line-in audio source for 5 seconds after about 15 seconds wait, so be patient. You can also change the loopback time from 5 sec to 100 sec.
Best regards,
Ming
Hi Pawel,
The first error was caused by the lacking of the C:\ti\c55_lp\c55_csl_3.08.01\inc in the including path in your CCS project.
The second error was caused by the incorrect "assembly source language". It should be "algebraic"
Best regards,
Ming
I will not create new forum question but i still have problem with DMA. Despite the setting DMA registers properly (I hope so) module does not transfer data from I2S to my array. I know that I have good destination and source address, interrupt function also works. But still my array is empty. What did I wrong? Below I insert my code with screenshots from debug mode.
Uint16 i2sDmaReadBufLeft[1024]; //my array
Uint16 Test=0; //variable for testing interrupt
// in main I call function initialize_dma
// codec works properly, I show this on a screenshot
TEST_STATUS initialize_dma(void){
status = DMA_init();
//Config left read
dmaConfig.pingPongMode = CSL_DMA_PING_PONG_DISABLE;
dmaConfig.autoMode = CSL_DMA_AUTORELOAD_ENABLE;
dmaConfig.burstLen = CSL_DMA_TXBURST_1WORD;
dmaConfig.trigger = CSL_DMA_EVENT_TRIGGER;
dmaConfig.dmaEvt = CSL_DMA_EVT_I2S2_TX;
dmaConfig.dmaInt = CSL_DMA_INTERRUPT_ENABLE;
dmaConfig.chanDir = CSL_DMA_READ;
dmaConfig.trfType = CSL_DMA_TRANSFER_IO_MEMORY;
dmaConfig.dataLen = 1024;
dmaConfig.srcAddr = (Uint32)&CSL_I2S2_REGS->I2SRXLT1;
//dmaConfig.destAddr = (Uint32)(i2sDmaReadBufLeft); this gives random address
IRQ_globalDisable();
IRQ_clearAll();
IRQ_disableAll();
IRQ_setVecs((Uint32)&VECSTART);
IRQ_clear(DMA_EVENT);
IRQ_plug (DMA_EVENT, &dma_isr);
IRQ_enable(DMA_EVENT);
IRQ_globalEnable();
dmaHandleRxL = DMA_open((CSL_DMAChanNum)6,&dmaObj, &status);
status = DMA_config(dmaHandleRxL, &dmaConfig);
Uint32 buffor = (Uint32)i2sDmaReadBufLeft; //adding properly address manually
dmaHandleRxL->dmaRegs->DMACH2DSAL = (Uint16)(buffor);
dmaHandleRxL->dmaRegs->DMACH2DSAU = (Uint16)(buffor >> 16);
//start channel with sync
dmaHandleRxL->dmaRegs->DMACH2TCR2 |= 0x8004;
return (status);
}
interrupt void dma_isr(void)
{
int ifrValue;
ifrValue = CSL_SYSCTRL_REGS->DMAIFR;
CSL_SYSCTRL_REGS->DMAIFR |= ifrValue;
Test++;
}
I uncommented this line but it did not help. I did this because in debug mode I saw that address in registers is different then address of my array when I write it in this way: dmaConfig.destAddr = (Uint32)(i2sDmaReadBufLeft);
