sci_test.c

sci的接口程序

#include "DSP28_Device.h"

#define	  SetData	GpioDataRegs.GPFDAT.bit.GPIOF12 = 1
#define	  ClrData   GpioDataRegs.GPFDAT.bit.GPIOF12 = 0
#define	  SetClk	GpioDataRegs.GPFDAT.bit.GPIOF8 = 1
#define	  ClrClk	GpioDataRegs.GPFDAT.bit.GPIOF8 = 0

unsigned  int  *LedReg  = (unsigned int *)0x27FF;    //LED 控制寄存器
unsigned  int  *Led8Lock = (unsigned int *)0x2BFF;

unsigned int Sci_VarRx[100];
unsigned int i,j;
unsigned int Send_Flag;
void	SendData(Uint16 data);

void main(void)
{

	/*初始化系统*/
	InitSysCtrl();

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

	/*初始化PIE中断*/
	InitPieCtrl();

	/*初始化PIE中断矢量表*/
	InitPieVectTable();	
	
	/*初始化SCIA寄存器*/
    InitSci();
    for(i = 0; i < 100; i++)
    {
    	Sci_VarRx[i] = 0;
    }
    i = 0;
    j = 0;
    Send_Flag = 0;
    
    #if SCIA_INT
	/*设置中断服务程序入口地址*/
	EALLOW;	// This is needed to write to EALLOW protected registers
	PieVectTable.TXAINT = &SCITXINTA_ISR;
	PieVectTable.RXAINT = &SCIRXINTA_ISR;
	EDIS;   // This is needed to disable write to EALLOW protected registers

	/*开中断*/
	IER |= M_INT9;
	#endif
	EINT;   // Enable Global interrupt INTM
	ERTM;	// Enable Global realtime interrupt DBGM
	*Led8Lock = 0X01;
	*LedReg = 0xFF;
	SendData(0xFF);
	for(;;)
	{
		if((SciaTx_Ready() == 1) && (Send_Flag == 1))
		{
			SciaRegs.SCITXBUF = Sci_VarRx[i];
			Send_Flag = 0;
			i++;
			if(i == j)
			{
				i = 0;
				j = 0;
			}
		}
		
		
		#if !SCIA_INT
		if(SciaRx_Ready() == 1)
		{
			Sci_VarRx[j] = SciaRegs.SCIRXBUF.all;
			Send_Flag = 1;
			j++;
			if(j == 100)
			{
				j = 0;
			}
		}
		#endif
	}

} 	

void	Delay(Uint16  data)
{
	Uint16	i;
	for (i=0;i<data;i++) { ; }	
}	

void	SendData(Uint16 data)
{
	Uint16	i,Temp;
	Temp = 0x80;
	for	(i=0;i<8;i++)
		{
			if ((data & Temp)==0)	ClrData;
			else	SetData;
			Temp >>= 1;
			ClrClk;
			Delay(10);
			SetClk;
		}
	*Led8Lock = 0x00;
	Delay(10);
	*Led8Lock = 0x01;
	SetData;		
}		
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// No more.
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