immortal13
Newbie level 6
ADSP-21369 SPORT problem
Hello!
I have got a problem with serial port of ADSP-21369. I'm trying to send data with DMA via SPORT interface and except of my data there some extra bit, which I don't need.
This is my configuration of SPORT:
At the beginning of transmitting data I have 3 extra redundant bits and to send for example 3 bytes I need bufSize of 5.
So, what is wrong with it? Has anyone been dealt with this problem?
Any help would be appreciated!
Viacheslav.
- - - Updated - - -
The problem with first extra bits is solved! Frame sync helped me to deal with it.
instead of
But I still can't understand, why do I need to make DMA bufSize larger by 2 bytes.
Hello!
I have got a problem with serial port of ADSP-21369. I'm trying to send data with DMA via SPORT interface and except of my data there some extra bit, which I don't need.
This is my configuration of SPORT:
Code:
static void InitSPORT (void)
{
unsigned CLKDIV = CCLK / 8 * SPCLK - 1;
*pDIV3 = CLKDIV << 1;
SRU(SPORT3_DB_O,DAI_PB04_I); // Connect SPORT to DAI pins
SRU(SPORT3_CLK_O, DAI_PB06_I); //
}
void WriteData (unsigned char *source, unsigned bufSize)
{
*pSPCTL3 = 0;
*pIISP3B = (unsigned char) source;
*pIMSP3B = 1;
*pCSP3B = bufSize;
*pSPCTL3 = SDEN_B | SPTRAN | SPEN_B | SLEN8 | ICLK;
}At the beginning of transmitting data I have 3 extra redundant bits and to send for example 3 bytes I need bufSize of 5.
So, what is wrong with it? Has anyone been dealt with this problem?
Any help would be appreciated!
Viacheslav.
- - - Updated - - -
The problem with first extra bits is solved! Frame sync helped me to deal with it.
Code:
*pSPCTL3 = SDEN_B | SPTRAN | SPEN_B | SLEN8 | FSR | IFS | LFS | LAFS | ICLK;
Code:
*pSPCTL3 = SDEN_B | SPTRAN | SPEN_B | SLEN8 | ICLK;But I still can't understand, why do I need to make DMA bufSize larger by 2 bytes.
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