led.c

采用C51语言完成基于74HC595的串口键盘与LED指示灯单元设计

#include <reg51.h>

char code map1[] = {0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x77,0x7C,0x58,0x5E,0x79,0x71};
char code map2[] = {0x00, 0x64};

void to_string(char* buf, unsigned char buf_len, unsigned int value) {
	//调用参数：显示字符串指针，可写字符个数，待转换值	 
    char i = buf_len - 1;
	for ( ; i >= 1 ; i--) {
	 	buf[i] = '0' + value % 10;
		value /= 10;
		if (value == 0) {
		 	break;
		}
	}
	i--;
	for ( ; i >= 0 ; i--) {		  //去零
	 	buf[i] = ' ';
	}
}

char convert(char c) {
    if (c == ' ') 
	   return map2[0];
	else if (c == '^')
	   return map2[1];
	else if (c >= '0' && c <= '9')
	    return map1[c - '0'];
	else if (c >='a' && c <= 'z')
	    return map1[c - 87];
	else 
	    return 0;
}

void delay() {
 	int i = 0, j = 0;
	for (i = 0 ; i < 10 ; i++) {
		for (j = 0 ; j < 10 ;j++) {
		}
	}
}

void print(char* buf) {
   char tmp[6] = {0, 0, 0, 0, 0, 0};
   char i = 0;
   for (i = 0 ;i < 6 ;i++) {
       P1 = 1 << i;
       P0 = convert(buf[i]);
	   delay();
   }
}