rec_f.c

单片机用于CAN 总线通讯

#include <Absacc.h>
#include <reg51.h>
#include <math.h>
#include <ADC0809.h>
#include <DISP7289.h>
#include <SJA1000.h>

main()
{ uint v_value,a,b,c;

  SJA_INI();
  while(1)
  {
   v_value=REC();
   v_value=v_value*100/255;    
     a=v_value/100;
     b=v_value%100/10;
     c=v_value%100%10;
   LED_DELAY_DISP();
   LED_DISP(3,a);
   LED_DISP(2,b);
   LED_DISP(1,c);
   LED_DISP(8,0x0c);
   }
}

void LED_SEND(unsigned char Send_Value)
 {
	unsigned char BIT_CNT;
	BIT_CNT=0x08;
	LED_DELAY_LONG();
	while( BIT_CNT!=0)
	{
		DIO=((Send_Value>>(BIT_CNT-1))&0x01);
		CLK=1;
		LED_DELAY_SHORT();
		CLK=0;
		LED_DELAY_SHORT();
		BIT_CNT--;
        }
 }


 void LED_DISP(unsigned char Led_Number,unsigned char Send_Value)
{
    unsigned char Disp_BUF;
	if(Led_Number==1)
		Led_Number=FIRST_LED;
	if(Led_Number==2)
		Led_Number=SECOND_LED;
	if(Led_Number==3)
		Led_Number=THIRD_LED;
	if(Led_Number==4)
		Led_Number=FOURTH_LED;
	if(Led_Number==5)
		Led_Number=FIFTH_LED;
	if(Led_Number==6)
		Led_Number=SIXTH_LED;
	if(Led_Number==7)
		Led_Number=SEVENTH_LED;
	if(Led_Number==8)
		Led_Number=EIGHTH_LED;
    CS=0;
	LED_DELAY_SHORT();
        Disp_BUF=Led_Number;
        LED_SEND(Disp_BUF);
	LED_DELAY_SHORT();
	LED_DELAY_LONG();
        Disp_BUF=Send_Value;
        LED_SEND(Disp_BUF);
    CS=1;
	LED_DELAY_LONG();

}

void LED_DELAY_SHORT(void)            //短延时
{
	unsigned char j;
	for(j=0;j<20;j++);//for(j=0;j<5*10;j++);
}

void LED_DELAY_LONG(void)             //长延时
{
    unsigned char j;
	for(j=0;j<160;j++)//for(j=0;j<25*10;j++)
	{;}
}

void LED_TEST(void)
{
   CS=0;

        LED_DELAY_SHORT();
        SEND_BUF=0XBF;
        LED_SEND(SEND_BUF);
        LED_DELAY_SHORT();
        LED_DELAY_LONG();
   CS=1;
        LED_DELAY_LONG();
}

void LED_RESET(void)
{
   CS=0;

        LED_DELAY_SHORT();
        SEND_BUF=0XC4;
        LED_SEND(SEND_BUF);
        LED_DELAY_SHORT();
        LED_DELAY_LONG();
   CS=1;
        LED_DELAY_LONG();
}


void LED_DELAY_DISP(void)             //延时
{
    unsigned int j;
	for(j=0;j<25000;j++);//for(j=0;j<25*10;j++)
}


uint REC(void)
{
uint q,v_value;
v_value=RXB5;
CMR=0x04;
return v_value;
}
void SJA_INI(void)
{
MODE=0x09;
CDR=0x88;
IER=0x0E;

ACR0=0xFF;
ACR1=0xFF;
ACR2=0xFF;
ACR3=0xFF;
AMR0=0xFF;
AMR1=0xFF;
AMR2=0xFF;
AMR3=0xFF;

BTR0=0x03;
BTR1=0xFF;
OCR=0xAA;
RBSA=0x00;
TXERR=0x00;
ECC=0x00;
MODE=0x08;
}