serial.c

dsp tmslf2407a 汇编,c的原代码,包括i2c,scitimer,fir等的很多程序.

#include "typedef.h"       
#include "f2407regs_c.h"   
#include "global.h"    

extern uchar pcdata[Len];      
extern uchar status_rx;
extern uchar len_rx;
extern uchar p_rx;     
extern uchar b_com_success;  
extern uint cfgdata[128];                           
void interrupt GISR1();
void serialPortInit(); 
void serialPortOutput1byte(uchar c);
void setSNT(void);
void clrSNT(void);   
void send_resp(void);
void testSerialOutput(); 
/////////////////////////////////////////////////////
void simInit(void);
void delay17us(void);
void delay26us(void);
void delay34us(void);
void delay52us(void);
void delay104us(void);
void simOutput1byte(uchar byte);
extern uchar simdata[50];	//模拟串口数据
extern uchar sim_begin;
extern uchar sim_end;
extern uint cfgdata[128];
#define frameHeader	0x7e
#define frameEnd	0x0d
#define		sc2_snt_0	MCRC &= 0xfdff;PFDATDIR |= 0x0200;PFDATDIR &= 0xfffd
#define		sc2_snt_1	MCRC &= 0xfdff;PFDATDIR |= 0x0202
#define 	simRxdIn	MCRB &= 0xffef;PCDATDIR &= 0xefff,PCDATDIR |= 0x10	
#define 	simTxdout1	MCRB &= 0xffdf;PCDATDIR |= 0x2020
#define 	simTxdout0	MCRB &= 0xffdf;PCDATDIR &= 0xffdf		
//////////////////////////////////////////////////////////////////////
   
/**********************************************/

//////////////////////////////////////////////////////////////////////////////////
void serialPortInit()  
{ 	
	uchar baud,form;
   	baud = cfgdata[17] >>8;
   	form = cfgdata[17] & 0x03;              //get parity
	switch (baud)
   	{
	      case 0x06: { SCIHBAUD = 0x02;SCILBAUD = 0x08; break; }//9600
	      case 0x07: { SCIHBAUD = 0x01;SCILBAUD = 0x03; break; }//19200
	      case 0x08: { SCIHBAUD = 0x00;SCILBAUD = 0x81; break; }//38400
	      case 0x09: { SCIHBAUD = 0x00;SCILBAUD = 0x56; break; }//57600
	      case 0x0a: { SCIHBAUD = 0x00;SCILBAUD = 0x2a; break; }//115200
	      default :  { SCIHBAUD = 0x00;SCILBAUD = 0x81; break; }//38400
   	}
	if(form==0)      { SCICCR = 0x07; }          //no parity
	else if(form ==1){ SCICCR = 0x67; }          //even parity
	else if(form ==2){ SCICCR = 0x27; }          //odd parity
	else             { SCICCR = 0x07; }          //no parity	
 	
	SCICTL1 = 0x03; 	/*发送器接收器使能*/
   	SCICTL2 = 0x02; 	/*使能接收中断 */    
   	SCICTL1 |= 0x20; 	/*sw reset*/  
   	SCIPRI &= 0x87;		/* high priority*/
   	MCRA |= 0x3;	// configure iopa0,iopa1 as SCITXD,SCIRXD 
   	IMR |= 0x01;		
   	IFR = 0xffff;  //clr all flag
   	
   	pcdata[0] = 0x05;pcdata[1] = 0x44;  /*测试数据*/
   	pcdata[2] = 0x33;pcdata[3] = 0x22;
   	pcdata[4] = 0x11;
   	                    
	status_rx = 0;   	                    
   	testSerialOutput();	//test Serial Output   	    			
}
/////////////////////////////////////////////////////////////////////////////////////////

void testSerialOutput() // initial serial port testing
{
	uchar i;
	for(i=0;i<pcdata[0];i++)	
		serialPortOutput1byte(pcdata[i]);
}

void serialPortOutput1byte(uchar c)
{ 	
	setSNT();  
	b_com_success = 1;  
	SCITXBUF = c;
	while((SCICTL2 & 0x40) == 0); 	
//	while((SCICTL2 & 0xc0) == 0); 
	clrSNT();
}   
void setSNT(void)
{
	MCRB &= 0xfffe;
	PCDATDIR |= 0x0101; //IOPC0设置为输出方式,置为1,send out	
}                   
void clrSNT(void)
{
	MCRB &= 0xfffe;
	PCDATDIR |= 0x0100;
	PCDATDIR &= 0xfffe;	//IOPC0设置为输出方式置为0,receive	
}    

void send_resp(void)
{         
   	uchar i;
   	uint j;
   	i = pcdata[0] - 2;
   	j = crc16Calculate(pcdata,i);
   	j = ~j;
   	pcdata[i]   = (j&0xff);     	//crc LSByte
   	pcdata[i+1] = (j>>8);     	//crc MSByte
   	for(i=0;i<pcdata[0];i++)
		serialPortOutput1byte(pcdata[i]);   
}  

static uchar simConter = 0;
void interrupt GISR1()
{   
	uchar rec = 0,temp;
	uchar i;
	uint simSerial;
	
	simSerial = cfgdata[18] >> 8;	
   	switch( PIVR)
   	{
   		case 0x0006: 
      	{ 
      		b_com_success = 1;       		      						     			       			
      		if(status_rx == 0 )
		 	{	
		 		len_rx = SCIRXBUF;  		             			             
		        if((len_rx > 4)&&(len_rx <188))  //接收数至少要有5个字节
		        {   			        	
		        	p_rx = 0;
		            pcdata[0] = len_rx;
		            status_rx = 1;
		            len_rx --; 
		            p_rx ++;			            
		        }
		    }
		    else if(status_rx == 1)
		    {   		    	 	
			   	pcdata[p_rx] = SCIRXBUF;
			    p_rx ++;
			    len_rx--;			
		        if(len_rx == 0)
		        {
		           	status_rx = 2;
		        }
		    }
		    else{rec=SCIRXBUF;}	//read to clear RXRDY flag	
		    IFR |= 0x01; 	    		    	
        	break;
		}
		case 0x0001: 	//高优先级模式的外部引脚1中断
		{  
			if(simSerial == 0x06)delay52us();	//取电平的中间位置
			else if(simSerial == 0x07)delay26us();	
			else if(simSerial == 0x08)delay17us();	
			else  delay26us();		    

			for(i=0;i<8;i++)//读取一个字节
			{			
				if(simSerial == 0x06)delay104us();	//位与位之间宽度	
				else if(simSerial == 0x07)delay52us();	
				else if(simSerial == 0x08)delay34us();	
				else  delay52us();					
				switch(i)
				{
					case 0:{if( (PCDATDIR&0x10) == 0x10 )rec |= 0x01;break;}
					case 1:{if( (PCDATDIR&0x10) == 0x10 )rec |= 0x02;break;}
					case 2:{if( (PCDATDIR&0x10) == 0x10 )rec |= 0x04;break;}
					case 3:{if( (PCDATDIR&0x10) == 0x10 )rec |= 0x08;break;}
					case 4:{if( (PCDATDIR&0x10) == 0x10 )rec |= 0x10;break;}
					case 5:{if( (PCDATDIR&0x10) == 0x10 )rec |= 0x20;break;}
					case 6:{if( (PCDATDIR&0x10) == 0x10 )rec |= 0x40;break;}
					case 7:{if( (PCDATDIR&0x10) == 0x10 )rec |= 0x80;break;}
				}
			}						
			if(rec == frameHeader)//判断帧头
			{
				sim_begin = 1;
				sim_end = 0;
				simConter = 0;
				simdata[simConter] = rec;
				simConter ++;								
			}
			else if(rec == frameEnd)//判断帧尾
			{
				simdata[simConter] = rec;
				sim_begin = 0;
				sim_end = 1;
				simConter = 0;
			}
			if( (sim_begin==1) && (sim_end==0) )
			{
				simdata[simConter] = rec;
				simConter ++;			
			}			
			XINT1CR |= 0x8000;	//清除xint1 flag
		}
      	default:     { break;}       
	} 
}   
void simInit(void)
{
	MCRA |= 0x0004;		// iopa2 as xint1
	XINT1CR &= 0xfff9;	//下降沿产生中断，高优先级
	XINT1CR |= 0x0001;	//使能外部中断
	simRxdIn;		// 输入信号
	sc2_snt_0;		//接收使能
}
void simOutput1byte(uchar byte)//模拟串口输出一个字节
{
	uchar i,temp;
	uint simSerial;
	
	simSerial = cfgdata[18] >> 8; 	
	sc2_snt_1;	//发送时打开发送使能
	simTxdout1;	// txd =1;
	simTxdout0;
	
	if(simSerial == 0x06)delay104us();	//开始位
	else if(simSerial == 0x07)delay52us();	
	else if(simSerial == 0x08)delay34us();	
	else  delay52us();
	
	temp = 0x01;
	for(i=0;i<8;i++)	//8位数据位
	{
		if( byte&temp ){simTxdout1;}
		else 		{simTxdout0;}
		
		if(simSerial == 0x06)delay104us();	
		else if(simSerial == 0x07)delay52us();	
		else if(simSerial == 0x08)delay34us();	
		else  delay52us();
		
		temp = temp << 1;
	}
	simTxdout1;
		
	if(simSerial == 0x06)delay104us();	//停止位	
	else if(simSerial == 0x07)delay52us();	
	else if(simSerial == 0x08)delay34us();	
	else  delay52us();	
	
	delay104us();	//字节与字节之间延时
	sc2_snt_0; 		//关闭发送使能
}