main.c

F2812实现电机控制源程序.rar

/*********************************************************************
**	Module Name:		RS-232  				    				**
**	Author:				Cbq  			    						**
**	Version:			1.0			    							**
**	CreateDate:			2008-05-16		    						**
**	Description:		            			    				**
**	Remark:				Huozq		    							**
**	Revision History:	2008-11-10			    					**
**********************************************************************/

/*********************************************************************
**	实验目的:通过学习串口通讯实验,理解DSP的传口与PC之间是怎样进行交 **
**           互的.                                                  **
**	实验说明:通过课本可知DSP有两个串口,SCIA和SCIB,本实验中我们用了  **
**           SCIA,并通过SP3232做电平转换.                           **
**	实验结果:打开串口调试工具,波特率设置在19200,数据位8,停止位1,其  **
**           他无,然后输入一串数据,发送给DSP,DSP也将收到的数据原样  **
**           回发给上位机.                                          **
**********************************************************************/


#include "DSP28_Device.h"
unsigned int Sci_VarRx[100];
unsigned int i,j;
unsigned int Send_Flag;

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

    
	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
	}

} 	


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