disp.c

STC单片机数码管测试程序

#include"stc89c5x.h"

#define uchar unsigned char
#define uint  unsigned int


sbit SCLK_LED = P4^0;	 //595时钟 新卡大数码管
sbit LATCH_LED = P4^3;	 //595锁存，高有效
sbit IO_LED = P4^1;		 //LED 数据输入口	

uchar LED_TAB[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x00};

void init();
void MsDelay(uint);
void Disp_LED();
void Send_Byte(uchar S_Byte);

main()
{
	init();
	while(1)
		{
		Disp_LED();
		}
}

//***************************************
//**********单片机初始化函数*************
//***************************************
void init()
{
	MsDelay(50);
	LATCH_LED = 0;
	SCLK_LED = 0;
	TMOD = 0x21;	//定时器1方式2，作波特率发生器，定时器0方式1，16位定时器
	SCON = 0x50;	//SET COMM. IN MODE1 设置串行口方式1，允许接收，10位异步收发
	PCON = 0x00;
	IE = 0x90;    //开总中断及串行中断
	TH0 = 0x72;	  //TIM   定时器0的初值,约20MS定时
	TL0 = 0x28;	//TIM
	TH1 = 0xFA;	//SET T0 IN MODE1,AS A TIMER. 定时器1初值
	TL1 = 0xFA;	//SET 9600BPS AT 22.1184MHz.
	//TR1 = 1;	//启动定时器
	//TR0 = 1;	
}

/**********************************
***********送显示的函数************
***********************************/
void Disp_LED()	//i决定了发送多少个字节的数据  //恭调试用
{
	uchar i;
	uint j;
	LATCH_LED = 0;
	for(i=0;i<=10;i++)
		{
		for(j=0;j<1000;j++)
			{
			Send_Byte(LED_TAB[i]);
    	LATCH_LED = 1;
			}
	  LATCH_LED = 0;
		}
}


/********************************
**********发送一字节的函数*******
*********************************/
void Send_Byte(uchar S_Byte)  
{
	uchar i;
	
	//LATCH_LED = 0;
	for(i=0;i<8;i++)
		  {
			SCLK_LED = 0;
			IO_LED = 0;
			if(S_Byte&0x80)
			   IO_LED = 1;
			SCLK_LED = 1;
			S_Byte <<= 1;	
			}
		SCLK_LED = 0;
		//LATCH_LED = 1;
		//MsDelay(1000);

}


/**********************************
*******1毫秒延时函数****************
***********************************/
void MsDelay(uint Delay)
{
	uchar i;
	for(;Delay>0;Delay--)
		for(i=124;i>0;i--);
}