DSP Hardware Design I - Digital Signal Processing Laboratory - page 114

if (polling) //bypass if interrupt-driven

{
temp = *(unsigned volatile int *)McBSP0_SPCR & 0x20000;
while (temp == 0)
temp = *(unsigned volatile int *)McBSP0_SPCR & 0x20000;
}
*(unsigned volatile int *)McBSP0_DXR = out_data;
}

int mcbsp0_read() //function for reading

{
int temp;

if (polling)
{
temp = *(unsigned volatile int *)McBSP0_SPCR & 0x2;
while (temp == 0)
temp = *(unsigned volatile int *)McBSP0_SPCR & 0x2;
}
temp = *(unsigned volatile int *)McBSP0_DRR;
return temp;
}

void TLC320AD535_Init() //init AD535

{
mcbsp0_read(); //setting up AD535 Register 3
mcbsp0_write(0);
mcbsp0_read();
mcbsp0_write(0);
mcbsp0_read();
mcbsp0_write(0);
mcbsp0_read();
mcbsp0_write(1); //send bit for Secondary Communications
mcbsp0_read();
mcbsp0_write(0x0386); //voice channel reset, pre-amps
selected
mcbsp0_read();
mcbsp0_write(0); //clear Secondary Communications