backrmsend40k.c

一个带CANBUS的倒车雷达源码！希望大家能用的上！

#include "config.h"

void BackRMSend40k( uchar pulse )  //CH3
{
	uint k = 350;
	
	PORTB = 0x00;
	PORTC = ( PORTC & 0xFC ) | 0x01;
	while( --k );
	PORTA = ( PORTA & 0xF8 ) | 0x02;
	while( --pulse != 0 )
	{
		PORTC = ( PORTC & 0xFC ) | 0x01;  
		Nop();                        
		Nop();                          
		Nop();                          
		Nop();                          
		Nop();                          
		Nop();                          
		Nop();                          
		Nop();                          
		Nop();	                        
		PORTC = ( PORTC & 0xFC ) | 0x02;     
		Nop();                          
		Nop();                          
		Nop();                          
		Nop();                          
	}
	PORTC = PORTC & 0xFC;
}