rs485.c

TI F2812 dsp sci source code

#include "DSP28_Device.h"

#ifdef RS485

unsigned int Sci_VarRx[100];
//unsigned int Sci_VarTx[100];
unsigned int i,j;
unsigned int Send_Flag;
//unsigned int *GPBMUX = (unsigned int *)0x70c4;
//unsigned int *GPBDIR = (unsigned int *)0x70c5;
//unsigned int *GPBDAT = (unsigned int *)0x70e4;
unsigned int loop;
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SCIB寄存器*/
    InitSci();
    
    //初始化RS485OE
    EALLOW;
    GpioMuxRegs.GPBMUX.bit.TCLKINB_GPIOB12 = 0;
    GpioMuxRegs.GPBDIR.bit.GPIOB12 = 1;
	EDIS;
//    *GPBMUX = (*GPBMUX) & 0xefff;
//    *GPBDIR = (*GPBDIR) | 0x1000;
    
    /*初始化变量*/
    for(i = 0; i < 100; i++)
    {
    	Sci_VarRx[i] = i;
    }
    i = 0;
    j = 0;
    Send_Flag = 0;
    
    //开中断
	EINT;   
	ERTM;
	//接收
    GpioDataRegs.GPBDAT.bit.GPIOB12 = 0;//使能接收
//	*GPBDAT = *GPBDAT & 0xefff;	
		
	//	GpioDataRegs.GPBDAT.bit.GPIOB12 = 0;
	for(j = 0;j < 100;j++)
	{	
		while(ScibRegs.SCIRXST.bit.RXRDY == 0);
		if(ScibRegs.SCIRXST.bit.RXRDY == 1)
		{
			Sci_VarRx[j] = ScibRegs.SCIRXBUF.all;
		}
//			while(ScibRegs.SCIRXST.bit.RXRDY == 0);
//			GpioDataRegs.GPBDAT.bit.GPIOB12 = 1;
	}
    //发送
    for(i = 0;i < 100;i++)
   	{
		while(ScibRegs.SCICTL2.bit.TXRDY == 0);
		if(ScibRegs.SCICTL2.bit.TXRDY == 1)
		{
			GpioDataRegs.GPBDAT.bit.GPIOB12 = 1;//RS485OE = 1使能发送
			ScibRegs.SCITXBUF = Sci_VarRx[i];
				
		}
	}
    
    for(;;)
    {
    }

    
}    





/*    for(;;)
    {
    	
    	if((ScibRegs.SCICTL2.bit.TXRDY == 1) && (Send_Flag == 1))
		{
			GpioDataRegs.GPBDAT.bit.GPIOB12 = 1;//RS485OE = 1使能发送
			ScibRegs.SCITXBUF = Sci_VarRx[i];
			Send_Flag = 0;
			i++;
			if(i == 100)//if(i == j)
			{
				i = 0;
			//	j = 0;
			}
			for(loop = 0;loop < 100;loop++);
			while(ScibRegs.SCICTL2.bit.TXRDY == 0);
			GpioDataRegs.GPBDAT.bit.GPIOB12 = 0;//RS485OE = 0使能接收
		}
		
		
		
		if(ScibRegs.SCIRXST.bit.RXRDY == 1)
		{
			Sci_VarRx[j] = ScibRegs.SCIRXBUF.all;
			Send_Flag = 1;
			j++;
			if(j == 100)
			{
				j = 0;
			}
//			while(ScibRegs.SCIRXST.bit.RXRDY == 0);
//			GpioDataRegs.GPBDAT.bit.GPIOB12 = 1;
		}
    
    }
    
}    
*/
#endif