Stc89C52 超声波测距 并且 1602显示

#include <reg52.h> #include "LCD1602.h" unsigned char IntToString(unsigned char *str, int dat) { signed char i = 0; unsigned char len = 0; unsigned char buf[6]; if (dat < 0) //如果为负数，首先取绝对值，并在指针上添加负号 { //dat = -dat; // *str++ = '-'; // len++; } do { //先转换为低位在前的十进制数组 buf[i++] = dat % 10; dat /= 10; } while (dat > 0); len += i; //i最后的值就是有效字符的个数 while (i-- > 0) //将数组值转换为ASCII码反向拷贝到接收指针上 { *str++ = buf[i] + '0'; } *str = '\0'; //添加字符串结束符 return len; //返回字符串长度 } void LcdWaitReady() { unsigned char sta; LCD1602_DB = 0xFF; LCD1602_RS = 0; LCD1602_RW = 1; do { LCD1602_E = 1; sta = LCD1602_DB; LCD1602_E = 0; }while(sta & 0x80); } void LcdWriteCmd(unsigned char cmd) { LcdWaitReady(); LCD1602_RS = 0; LCD1602_RW = 0; LCD1602_DB = cmd; LCD1602_E = 1; LCD1602_E = 0; } void LcdWriteDat(unsigned char dat) { LcdWaitReady(); LCD1602_RS = 1; LCD1602_RW = 0; LCD1602_DB = dat; LCD1602_E = 1; LCD1602_E = 0; } void LcdSetCursor(unsigned char x, unsigned char y) { unsigned char addr; if(y == 0) addr = 0x00 + x; else addr = 0x40 + x; LcdWriteCmd(addr | 0x80); } void LcdShowStr(unsigned char x, unsigned char y, unsigned char *str) { LcdSetCursor(x, y); while(*str != '\0') { LcdWriteDat(*str++); } } void InitLcd1602() { LcdWriteCmd(0x38); LcdWriteCmd(0x0C); LcdWriteCmd(0x06); LcdWriteCmd(0x01); }