frontlsend40k.c

一个带CANBUS的倒车雷达源码！希望大家能用的上！

#include "config.h"

void FrontLSend40k( uchar pulse )  //CH5
{
	uint k = 350;  
	
	PORTB = ( PORTB & 0xCF ) | 0x10;
	while( --k );
	PORTA &= 0xF8;
	while( --pulse != 0 )
	{
		PORTB = ( PORTB & 0xCF ) | 0x10;  
		Nop();                        
		Nop();                          
		Nop();                          
		Nop();                          
		Nop();                          
		Nop();                          
		Nop();                          
		Nop();                          
		Nop();	                        
		PORTB = ( PORTB & 0xCF ) | 0x20;     
		Nop();                          
		Nop();                          
		Nop();                          
		Nop();                          
	}
	PORTB = PORTB & 0xCF;
}