Other Parts Discussed in Thread: TMS320C5505
Hi,
Am using tms320c5505 custom board with xds100 usb v1 emulator. now i want use spi protocol from tms320c5505 . i dont how to mux it from gpio ., and also need some spi initialize coding ., could you please provide me ?
Hi,
All the register i configuring perfectly for C5505 SPI0 , using the pins which i said in previous post. i uploaded the code and screenshot of ccs. please check and tell., continuously am writing some values in SPIDAT register and checking in the SPI lines not getting any pulses.... i Think my SPI i not enabled.. please check this and solve this ,.
void main( void )
{
/* Initialize BSL */
USBSTK5515_init( ); // Enable clock to all peripherals
SPI_Init(); // Initialize the SPI0
sampt = 1/sampf;
nsamp = sampf/inpf;
DAC_CS_HIGH();
while(1)
{
for(count=0;count<nsamp;count++)
{
teta = (2 * PI * inpf * sampt * count);
value = sin(teta)*2048;
Sent_to_SPI(value);
}
}
}
void Sent_to_SPI(unsigned int Value)
{
Value = (Value & 0x0FFF);
SPI_Write(Value);
}
void SPI_Init()
{
volatile Int16 looper;
SYS_EXBUSSEL = 0x5000; // Enable GPIO18,19,20,27 mode - 2 bus , for SPI mode 3
SYS_PRCNTR = 0xFFFF; // Periperla s/w RST counter Register PSRCR
SYS_PRCNTRLR = 0x00FF; // Peripheral Reset Control Register PRCR
SPICDR = 0x0000;
SPICCR = 0x0000;
SPIDCR1 = 0x0000;
SPIDCR2 = 0x0000;
SPICMD1 = 0x0000;
SPICMD2 = 0x0000;
SPISTAT1 = 0x0000;
SPISTAT2 = 0x0000;
SPIDAT1 = 0x0000;
SPIDAT2 = 0x0000;
for(looper = 0; looper < 100; looper++) {;}
SPICCR = (1<<15)|(0<<14); // Enable the SPI_CLK, RST release
delay_ms(10);
SPICDR = 0x0019; // SPI_CLK = (SPI_IP FREQ/(CLKDIV+1))
SPICMD2 = (0<<12)|(15<<3)|(3<<0); // select CS0, CLEN = 15 - word length, write cmd
SPICMD1 = (1<<14)|(1<<0); // frame length - 2 ,FLEN+1, no interrupts
SPIDCR1 = (0<<3)|(0<<2)|(0<<1)|(0<<0);
}
/****************************/
/* SPI 16 bit Data to Dac */
/****************************/
void SPI_Write(unsigned int Data)
{
Data = ( 0x3000 | Data );
// Wait for transmit ready - check busy bit
while((SPISTAT1 & 0x0001)==1);
SPIDAT1 = Data;
// Wait for Character transfer complete
//while((SPISTAT1 & 0x0002)==0);
}
