Hi, I'm using the ICE V2 SPI1 port and am having trouble getting the SPI1_CS0 (pin C12) line to work correctly. I can toggle the output when it's configured as a GPIO so I know I'm on the right pin. I can send data and see the clock and data lines working correctly, just the CS0 pin never changes state.
I have 2 questions:
1) When configured as a master using the following code, I can't force the CS0 pin using the assert/de-assert routines or writing directly to SPIEN0 with SPIENDIR=0. The called McSPI routines are the as supplied IDK/starterware in osdrv_mcspi and mcspi.c
void SPI1_Init()
{
int b;
int pin=17; //GPIO3_17 is CS0
int spiId=1; //for base address SP0 or SPI1
chNum=1; // same as spiId?
unsigned char spiClockDiv=20;
unsigned char spiDir= 0;
b=McSPIPinMuxConfig(spiId);
b=McSPIInit(spiId, spiClockDiv, spiDir, MCSPI_MULTI_CH,chNum);
McSPIWordLengthSet(baseAdd,MCSPI_WORD_LENGTH(16),chNum);
McSPICSPolarityConfig(baseAdd,MCSPI_CS_POL_LOW,chNum);
McSPIChannelEnable(baseAdd,chNum);
/* SPI1 CS0 manual control*/
HWREG(baseAdd + MCSPI_SYST) = (HWREG(baseAdd + MCSPI_SYST) & ~MCSPI_SYST_SPIEN_0);
HWREG(baseAdd + MCSPI_SYST) |= (1 << MCSPI_SYST_SPIEN_0_SHIFT); //one of these SHOULD change CS0
McSPICSAssert(baseAdd,chNum);
McSPICSDeAssert(baseAdd,chNum); //NONE of these lines affect the state of CS0
}
2) How can I configure the CS0 pin to work automatically so the code doesn't have to monitor the transmission then de-assert it after the buffer is sent?
