rs232.c

TMS320F2812片上异步串行收发器SCI口源代码

/*----------   RS232   -----------*/


#include "DSP28_Device.h"


#ifdef RS232

/*与主机通信方式的变量定义*/
#if !SelfTest
unsigned int Sci_VarRx[100];
unsigned int i,j;
unsigned int Send_Flag;
#endif

/*自测试方式的变量定义*/
#if SelfTest
unsigned int Sci_VarT[10] = {0,1,2,3,4,5,6,7,8,9};
unsigned int Sci_VarR[10];
unsigned int Send_Flag;
unsigned int i,j;
#endif

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();
    
    /*与主机通信方式变量初始化*/
    #if !SelfTest
    for(i = 0; i < 100; i++)
    {
    	Sci_VarRx[i] = 0;
    }
    i = 0;
    j = 0;
    Send_Flag = 0;
    #endif
    
    /*自测试方式变量初始化*/
    #if SelfTest
    for(i = 0; i < 10; i++)
    {	
    	Sci_VarR[i] = 0;
    }
    i = 0;
	j = 0;
	Send_Flag = 1;
	#endif

	//开中断
	EINT;   
	ERTM;	

	for(;;)
	{
		
		/*与主机通信方式*/
		#if !SelfTest
		if((SciaRegs.SCICTL2.bit.TXRDY == 1) && (Send_Flag == 1))
		{	
			SciaRegs.SCITXBUF = Sci_VarRx[i];
			Send_Flag = 0;
			i++;
			if(i == j)
			{
				i = 0;
				j = 0;
			}
		}
		
		if(SciaRegs.SCIRXST.bit.RXRDY == 1)
		{
			Sci_VarRx[j] = SciaRegs.SCIRXBUF.all;
			Send_Flag = 1;
			j++;
			if(j == 100)
			{
				j = 0;
			}
		}
		#endif
	
	
		/*自测试方式*/
		#if SelfTest
	
		if((SciaRegs.SCICTL2.bit.TXRDY == 1)&&(Send_Flag == 1))
		{	
			SciaRegs.SCITXBUF = Sci_VarT[i];
			Send_Flag = 0;
			i++;
			if(i == 10)
			i = 0;
	
		}
	
		if(SciaRegs.SCIRXST.bit.RXRDY == 1)
		{	
			Sci_VarR[j] = SciaRegs.SCIRXBUF.all;
			Send_Flag = 1;
			j++;
			if(i == 10)
			j = 0;
		
		}
		#endif
	
	}

	
} 	

#endif