mcbsp_test.c

TMS320F2812DSP与DAC7731的接口程序

//	McbspRegs.SPCR1.bit.DLB = 1;	
// enabled Digital loop back mode	
	
#include "DSP28_Device.h"
unsigned int McBSP_VarRx[100];
unsigned int i,j;
unsigned int send_flag;
unsigned int step;
void delay_loop(void);
void delay1(void);
void main(void)
{

	/*初始化系统*/
	InitSysCtrl();

	/*关中断*/
	DINT;
	IER = 0x0000;
	IFR = 0x0000;

	/*初始化PIE*/
	InitPieCtrl();

	/*初始化PIE矢量表*/
	InitPieVectTable();	
	
	/*初始化MCBSP外设*/
	InitMcbsp();
    
    for(i = 0; i < 100; i++)
    {
    	McBSP_VarRx[i] = 0;
    }
    step=0x0000;
    
    // Enable global Interrupts and higher priority real-time debug events:
    
	EINT;   // Enable Global interrupt INTM
	ERTM;	// Enable Global realtime interrupt DBGM
	i = 0;
	j = 0;
	send_flag = 0;

// Step 6. IDLE loop. Just sit and loop forever (optional):	

    GpioDataRegs.GPFDAT.bit.GPIOF14 =0; //LDAC rising edge
    GpioDataRegs.GPFDAT.bit.GPIOF14 =0; //LDAC rising edge    
    for(;;)
    {
		if(Mcbsp_TxRdy() == 1)
    	{
			McbspRegs.DXR1.all = step;
            while(!McbspRegs.SPCR2.bit.XEMPTY){}
            //Wait Transmit shift register (XSR) empty
            GpioDataRegs.GPFDAT.bit.GPIOF14 =1;
        }		    	
    if(step==0xF000)
    step=0;
    step=step+0x1000;
//  step=0xF000;    	
    delay_loop();
    GpioDataRegs.GPFDAT.bit.GPIOF14 =0; //LDAC rising edge
    delay1();
//    for(;;){}
    }

} 	

void delay1()
{
    short      i,j;
    for (i = 0; i < 1000; i++) 
    {
        for (j = 0; j < 10; j++) {}
    }
    
}

void delay_loop()
{
    short      i,j;
    for (i = 0; i < 10000; i++) 
    {
        for (j = 0; j < 1000; j++) {}
    }
    
}
/*		if(Mcbsp_RxRdy() == 1)
		{
			McBSP_VarRx[j] = McbspRegs.DRR1.all;
//			send_flag = McbspRegs.DRR2.all;
			j++;
			send_flag = 0;
			if(j == 100)
			{
				j = 0;
			}
		}*/