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本帖最后由 lenmon13 于 2018-9-9 14:18 编辑
HC6800-ES V2.0.pdf
(404.98 KB, 下载次数: 35)
stc89c52超声波测距怎么接线和程序是什么？买开发板给的程序和接线要求 Trig ------- P2^1; Echo ------- P2^0; VCC -------- +5v GND -------- GND
我接上去了，程序也烧录进去了 就是液晶屏没有显示。
#include"lcd.h"
void Read_Busy() //忙检测函数，判断bit7是0，允许执行；1禁止
{
unsigned char sta; //
LCD1602_DB = 0xff;
LCD1602_RS = 0;
LCD1602_RW = 1;
do
{
LCD1602_EN = 1;
sta = LCD1602_DB;
LCD1602_EN = 0; //使能，用完就拉低，释放总线
}while(sta & 0x80);
}
void Lcd1602_Write_Cmd(unsigned char cmd) //写命令
{
Read_Busy();
LCD1602_RS = 0;
LCD1602_RW = 0;
LCD1602_DB = cmd;
LCD1602_EN = 1;
LCD1602_EN = 0;
}
void Lcd1602_Write_Data(unsigned char dat) //写数据
{
Read_Busy();
LCD1602_RS = 1;
LCD1602_RW = 0;
LCD1602_DB = dat;
LCD1602_EN = 1;
LCD1602_EN = 0;
}
void LcdSetCursor(unsigned char x,unsigned char y) //坐标显示
{
unsigned char addr;
if(y == 0)
addr = 0x00 + x;
else
addr = 0x40 + x;
Lcd1602_Write_Cmd(addr|0x80);
}
//按指定位置显示一个字符
void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData)
{
Y &= 0x1;
X &= 0xF; //限制X不能大于15，Y不能大于1
if (Y) X |= 0x40; //当要显示第二行时地址码+0x40;
X |= 0x80; //算出指令码
Lcd1602_Write_Cmd(X); //发命令字
Lcd1602_Write_Data(DData); //发数据
}
void LcdShowStr(unsigned char x,unsigned char y,unsigned char *str) //显示字符串
{
LcdSetCursor(x,y); //当前字符的坐标
while(*str != '\0')
{
Lcd1602_Write_Data(*str++);
}
}
void InitLcd1602() //1602初始化
{
Lcd1602_Write_Cmd(0x38); //打开，5*8,8位数据
Lcd1602_Write_Cmd(0x0c);
Lcd1602_Write_Cmd(0x06);
Lcd1602_Write_Cmd(0x01); //清屏
}
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![I~[FBHS9YPS{JAYW][$M7BH.jpg](static/image/common/none.gif "I~[FBHS9YPS{JAYW][$M7BH.jpg")
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