Sign in
Search c28x
Subscribe to c28x
Discussion Groups
Discussion Groups | TMS320C28x | f2812 dsp SPI query initialization correct or not
Technical discussions about the TI C28x DSPs (including the C2810, C2811, C2812, F2801, F2806, F2808, F2810,, F2811, F2812, R2811 and R2812).
f2812 dsp SPI query initialization correct or not - Pari...@uwe.ac.uk - Dec 21 8:01:00 2005
hello
i have problems with the spi of f2812. please advice if you have got any programs which i can look at. I am new to dsp programming and the program which i created doesnt work for motor control applications. I am trying to send a digital value to the d to a converter thrugh the SPI.
please help
regards
#include "DSP281x_Device.h" // DSP281x Headerfile Include File
#include "DSP281x_Examples.h" // DSP281x Examples Include File
void spi_fifo_init(void);
void spi_xmit(Uint16 a);
int des,p;
Uint16 sdata;
Uint16 PORTA;
int x=0;
main()
{
InitSysCtrl();
DINT;
IER = 0x0000;
IFR = 0x0000;
InitPieCtrl();
EALLOW;
GpioMuxRegs.GPAMUX.all=0X0000;
GpioMuxRegs.GPADIR.all=0XF000;
GpioMuxRegs.GPBMUX.all=0X0000;
GpioMuxRegs.GPBDIR.all=0X001E;
EDIS;
EALLOW;
GpioDataRegs.GPBDAT.all= 0X000;
EDIS;
EALLOW;
GpioMuxRegs.GPFMUX.all=0x000F; // Select GPIOs to be SPI pins
// Port F MUX - x000 0000 0000 1111
EDIS;
spi_fifo_init(); // Initialize the SPI only for(;;)
{
// read
GpioDataRegs.GPBDAT.bit.GPIOB0=0;// Strobe low indicates reading data
GpioDataRegs.GPADAT.all= PORTA;
GpioDataRegs.GPBDAT.bit.GPIOB0=1;// Strobe high
if(PORTA<4096)
{
goto first;
}
else
x++;
{
first: if(x!=des)
{
spi_xmit(sdata);// transmit data
}
else
printf("ESTOPO");
}
}
}
void spi_fifo_init()
{
// Initialize SPI FIFO registers
SpiaRegs.SPICCR.bit.SPISWRESET=0; // Reset SCI
SpiaRegs.SPICCR.all=0x000F; //16-bit character
SpiaRegs.SPICTL.all=0x0006;
SpiaRegs.SPISTS.all=0x0000;
SpiaRegs.SPIBRR=0x0063; // Baud rate
SpiaRegs.SPIFFTX.all=0xC028; // Enable FIFO's, set TX FIFO level to 8
SpiaRegs.SPIFFCT.all=0x00;
SpiaRegs.SPIPRI.all=0x0010;
SpiaRegs.SPICCR.bit.SPISWRESET=1; // Enable SCI
SpiaRegs.SPIFFTX.bit.TXFIFO=1;
}
void spi_xmit(Uint16 a)
{
SpiaRegs.SPITXBUF=a;
}
(You need to be a member of c28x -- send a blank email to c28x-subscribe@yahoogroups.com )