mune.#2

这是一种温度变送器的源代码

#include<c8051f350.h>

sbit SRCLK=P0^0;
sbit SER=P0^2;
sbit SDA=P0^6;
sbit SCL=P0^7;

sbit RCK0=P1^1;
sbit RCK1=P1^2;
sbit RCK2=P1^3;
sbit RCK3=P1^4;
sbit RCK4=P1^5;

void wait()
{
	unsigned int j;
	for(j=0;j<1;j++);
}

/*bit crol(unsigned char a,unsigned char b)
{
	return 0;
}*/

void WriteSIOByte(unsigned char val)
{
	unsigned char i;
  	ACC = val;
  	for (i = 16; i > 0; i --)
	{
	    SRCLK = 0;//拉低74HC595时钟	    
	    SER = 1;//crol();//crol(ACC,1);// CY;//发送74HC595一位串行数据
		wait();
	    SRCLK = 1;//拉高74HC595时钟
	    wait();//延时
		
	}
	SRCLK=0;
	wait();
	SER=1;
	RCK0=0;
	wait();//延时
	RCK0=1;
	wait();
	RCK0=0;

	RCK1=0;
	wait();
	RCK1=1;
	wait();
	RCK1=0;
}

void WriteRelayByte()
{
	unsigned char i;
  	//ACC = val;
  	for (i = 8; i > 0; i --)
	{
	    SRCLK = 0;//拉低74HC595时钟	    
	    SER = 0;//crol(ACC,1);// CY;//发送74HC595一位串行数据
		wait();
	    SRCLK = 1;//拉高74HC595时钟
	    wait();//延时
	}
	SRCLK=0;
	wait();
	SER = 1;
	RCK2 = 0;
	wait();//延时
	RCK2 = 1;
	wait();
	RCK2=0;
}

void main()
{
	//系统时钟设置
	CLKSEL	=0;//选择内部时钟
	OSCICN	=0x80;//内部时钟使能,8分频
	PCA0MD	=0;//禁止看门狗
	
	//端口初始化
	XBR0	=0;
	XBR1	=0x40;
	P0MDIN	=0xff;
	P0MDOUT	=0;
	P0SKIP	=0;
	P1MDIN	=0xff;
	P1MDOUT	=0;
	P1SKIP	=0;

	

	RCK0=0;
	RCK1=0;
	RCK2=0;
	RCK3=0;
	RCK4=0;
	SER=1;
	SRCLK=1;

	WriteRelayByte();
	WriteSIOByte(55);
}