t_mini.c

9850的AT89s52程序。写的比较完善。

#include <absacc.h>
#include <reg51.h>
#include <String.h>

#define			uchar 		unsigned char 

sbit			FQ_UD	=	P1^5;
sbit			WCLK	=	P1^6;
sbit			D		=	P1^7;
 
#define 		uchar  unsigned char 
#define			uint	unsigned int

void delay(uint n){
	uint i;
	for(i = 0; i < n; i++){
		}
	return;
}

void init_9850(){
	WCLK = 0;
	FQ_UD = 0;
	delay(2);
	WCLK = 1;
	delay(2);
	WCLK = 0;
	delay(5);
	FQ_UD = 1;
	delay(2);
	FQ_UD = 0;
}

void Write9850_(unsigned long dataToWrite){
	uchar i;
	FQ_UD = 0;
	WCLK = 0;
	for(i = 0; i < 40; i++){
		WCLK = 0;
		delay(3);
		if(dataToWrite & 0x00000001)
			D = 1;
		else
			D = 0;
		delay(2);
		WCLK = 1;
		dataToWrite = dataToWrite >> 1;
	}
	FQ_UD = 1;
	WCLK = 0;
	delay(5);
	FQ_UD = 0;
}

void Write_freq(unsigned long freq){
	unsigned long dataToWrite;
	dataToWrite = (long)(35.791394 * freq);	  //120m时钟输入2^32 / 120m
	Write9850_(dataToWrite);
}

void main(){
	FQ_UD = 0;
	WCLK = 0;
	init_9850();
	Write_freq(100);//1M
	while(1){

	}

}