Kinetis MicrocontrollersのトピックRe: DMA - UART receive

DMA - UART receive

ksaiviswanadhul — Mon, 26 Oct 2020 11:24:02 GMT

Hi,

i am using kinetis k60 board. i'm facing issue on receiving multiple characters in dma uart receive please help me below attached code... i want to receive multiple bytes but i'm receiving single byte only.

void dma_receive(DMA_MemMapPtr dmach , uint8_t ch , uint8_t* val)
{
int j;
int i;
for(i=0;i<100;i++);

DMA_SADDR_REG(dmach , ch) =0;
//DMA_CR |= DMA_CR_EMLM_MASK;
DMA_SADDR_REG(dmach , ch)|= DMA_SADDR_SADDR(0x4006B007); // CONFIGURING SOURCE ADDRESS
for( j =0 ; j<1000; j++);

DMA_SOFF_REG(dmach,ch) =0;
DMA_TCD0_SLAST= 0x0;
DMA_ATTR_REG(dmach , ch) = (DMA_ATTR_SSIZE(0) | DMA_ATTR_DSIZE(0)); //CONFIGURING SOURCE ADDRESS SIZE

// DMA_NBYTES_MLOFFNO_REG(dmach , ch) = DMA_NBYTES_MLOFFNO_SMLOE_MASK|DMA_NBYTES_MLOFFNO_DMLOE_MASK| DMA_NBYTES_MLOFFNO_NBYTES(0x01);
//

DMA_NBYTES_MLNO_REG(dmach , ch) = 0;

DMA_NBYTES_MLNO_REG(dmach , ch)|= (DMA_NBYTES_MLNO_NBYTES(0x01));
DMA_DADDR_REG(dmach , ch) = 0;
DMA_DADDR_REG(dmach , ch) |= DMA_DADDR_DADDR(val); //CONFIGURING DESTINATION ADDRESS ADDRESS

DMA_DOFF_REG(dmach , ch) = DMA_DOFF_DOFF(0x01);

DMA_BITER_ELINKNO_REG(dmach , ch) =0;

DMA_BITER_ELINKNO_REG(dmach , ch) = DMA_BITER_ELINKNO_BITER(0x01); //STARTING MAJOR ITERATION COUNT
DMA_CITER_ELINKNO_REG(dmach , ch) =0;
DMA_CITER_ELINKNO_REG(dmach , ch) = DMA_CITER_ELINKNO_CITER(0x01); // CURRENT MAJOR ITERATION COUNT

DMA_SERQ |= DMA_SERQ_SERQ_MASK;

DMA_CSR_REG(dmach , ch) = DMA_CSR_START_MASK; // START THE DMA

}

Re: DMA - UART receive

Omar_Anguiano — Tue, 03 Nov 2020 17:32:17 GMT

Hello ksaiviswanadhul

I suggest you to refer into the SDK examples. There you can find an example that shows how to use the UART driver with eDMA.

Let me know if this is helpful, if you have more questions do not hesitate to ask me.

Best regards,

Omar

Regarding qt5

ksaiviswanadhul — Mon, 05 Jul 2021 07:12:12 GMT

There are four QT5 browsers available in imx8qmmek . QtWebEngine browsers can be found in: