Hi,
I am trying the transfer and receive sixteen 16 bits words from master to slave and slave to master through DSPI using MPC5777C
The TX FIFO COUNTER in DSPI_SR is not incrementing to more than 4 while more than four 16 bits words are assigned to DSPI_PUSHR
Please refer the following code for configuration and data transfers.
static void DSPI_A_Init(void)
{
/*Configured Slave mode */
DSPI_A.MCR.R =0x40010001;
DSPI_A.MODE.CTAR_SLAVE[0].R = 0x38000000;
DSPI_A_CTAR0 = 0x78021004;
/* Exit HALT mode: go from STOPPED to RUNNING state*/
DSPI_A.MCR.B.HALT = 0x0;
}
static void DSPI_B_Init(void)
{
/*Configured Master mode */
DSPI_B.MCR.R =0xC0010001; //0x80010001;
DSPI_B_CTAR0 = 0x78021004;
/* Exit HALT mode: go from STOPPED to RUNNING state*/
DSPI_B.MCR.B.HALT = 0x0;
}
static void DSPI_GPIO_Init(void)
{
/*DSPI_A*/
SIU.PCR[96].R = 0x05D3; //DSPI_A_CS0
SIU.PCR[93].R = 0x05D3; //DSPI_A_SCK
SIU.PCR[95].R = 0x06D3; //DSPI_A_SOUT
SIU.PCR[94].R = 0x05D3; //DSPI_A_SIN
/*DSPI_B*/
SIU.PCR[105].R = 0x06D3; //DSPI_B_CS0 //Input
SIU.PCR[102].R = 0x06D3; //DSPI_B_SCK
SIU.PCR[104].R = 0x06D3; //DSPI_B_SOUT
SIU.PCR[103].R = 0x05D3; //DSPI_B_SIN
}
int main (void)
{
vint32_t counter = 0,size = 0,i = 0;
char data = 0;
char ctest[80];
/* Hardware initialization */
HW_init();
/* PLL0 for 64MHz */
SysClk_Init();
DSPI_GPIO_Init();
DSPI_A_Init();
DSPI_B_Init();
DSPI_B.MCR.B.HALT = 0x1;
DSPI_A.MCR.B.HALT = 0x1;
for(i=0;i<=16;i++)
{
/*SPI Transmit and Read*/
if(i <= 15)
{
DSPI_A.PUSHR.PUSHR_SLAVE.R = 0x00011234+i;
DSPI_B.PUSHR.PUSHR.R = 0x80015678+i;
}
else
{
DSPI_A.PUSHR.PUSHR_SLAVE.R = 0x00011234+i;
DSPI_B.PUSHR.PUSHR.R = 0x08015678+i;
}
}
DSPI_B.MCR.B.HALT = 0x0;
DSPI_A.MCR.B.HALT = 0x0;
for(i=0;i<=16;i++)
{
ReadDataDSPI_A();
ReadDataDSPI_B();
vDelay(10);
}
while(1)
{
;
}
return 0;
}
void ReadDataDSPI_A(void)
{
while (DSPI_A.SR.B.RFDF != 1) { } /* Wait for Receive FIFO Drain Flag = 1 */
RecDataSlave = DSPI_A.POPR.R; /* Read data received by slave SPI */
DSPI_A.SR.R = 0x80020000; /* Clear TCF, RDRF flags by writing 1 to them */
}
void ReadDataDSPI_B(void)
{
while (DSPI_B.SR.B.RFDF != 1) { } /* Wait for Receive FIFO Drain Flag = 1 */
RecDataMaster = DSPI_B.POPR.R; /* Read data received by master SPI */
DSPI_B.SR.R = 0x90020000; Clear TCF, RDRF, EOQ flags by writing 1 */
}
