8051单片机(STC89C52)串口接收字符并将其ASCII码(小于100)显示在数码管上

淡淡的烟草味﹌ 2021-12-10 23:09 252阅读 0赞

#include <STC89C5xRC.H>
    
    unsigned char code DIG_CODE[10] = {0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07, 0x7f, 0x6f};
    
    char buf;
    
    void delay()//提供时延
    {
    	int i, j;
    	for(i = 0; i < 15; i ++)
    		for(j = 0; j < 15; j ++)
    			;
    }
    
    void disp_digit(char d)
    {
    	//显示个位数字
    	P0 = DIG_CODE[d % 10];
    	P2 = 0;// 0000 0000 -> (P24, P23, P22) = (0, 0, 0) -> 右数第一个数字亮
    	delay();
    	//显示十位数字
    	P0 = DIG_CODE[d / 10];
    	P2 = 1 << 2;// 0000 0100 -> (P24, P23, P22) = (0, 0, 1) -> 右数第二个数字亮 
    	delay();
    }
    
    void UART_INT() interrupt 4 //UART中断
    {
    	if(RI == 1)
    	{
    		RI = 0;
    		buf = SBUF;	
    	}
    }
    
    int main()
    {
    	TMOD = 0x21; //设定timer1的工作模式
    	SCON = 0x50; //设置串行通信格式
    	TH1 = 0xE6; //设定timer1的初始值
    	TL1 = 0xE6; 
    	IE = 0x90;//总开关闭合(EA) + 串口中断开关闭合(ES)
    	TR1 = 1; //开启timer1
    	while(1)
    	{
    		disp_digit(buf);
    	}
    	return 0;
    }

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