#include "lcd1602.h"
/* 等待液晶准备好 */
void LcdWaitReady(){
uchar sta;
LCD1602_DB = 0xFF;
LCD1602_RS = 0;
LCD1602_RW = 1;
do {
LCD1602_E = 1;
sta = LCD1602_DB; //读取状态字
LCD1602_E = 0;
}while (sta & 0x80); //bit7 等于 1 表示液晶正忙,重复检测直到其等于 0 为止
}
/* 向 LCD1602 液晶写入一字节命令,cmd-待写入命令值 */
void LcdWriteCmd(uchar cmd)
{
LcdWaitReady();
LCD1602_RS = 0;
LCD1602_RW = 0;
LCD1602_DB = cmd;
LCD1602_E = 1;
LCD1602_E = 0;
}
/* 向 LCD1602 液晶写入一字节数据,dat-待写入数据值 */
void LcdWriteDat(uchar dat)
{
LcdWaitReady();
LCD1602_RS = 1;
LCD1602_RW = 0;
LCD1602_DB = dat;
LCD1602_E = 1;
LCD1602_E = 0;
}
/* 设置显示 RAM 起始地址,亦即光标位置,(x,y)-对应屏幕上的字符坐标 */
void LcdSetCursor(uchar x, uchar y)
{
uchar addr;
if (y == 0){ //由输入的屏幕坐标计算显示 RAM 的地址
addr = 0x00 + x; //第一行字符地址从 0x00 起始
}else{
addr = 0x40 + x; //第二行字符地址从 0x40 起始
}
LcdWriteCmd(addr | 0x80); //设置 RAM 地址
}
//在指定位置显示一个字符
void LcdShowOneChar(uchar x, uchar y, uchar Data)
{
LcdSetCursor(x, y); //设置起始地址
LcdWriteDat(Data);
}
/* 在液晶上显示字符串,(x,y)-对应屏幕上的起始坐标,str-字符串指针 */
void LcdShowStr(uchar x, uchar y, uchar *str)
{
LcdSetCursor(x, y); //设置起始地址
while (*str != '\0'){ //连续写入字符串数据,直到检测到结束符
LcdWriteDat(*str++); //先取 str 指向的数据,然后 str 自加 1
}
}
/* 初始化 1602 液晶 */
void InitLcd1602()
{
LcdWriteCmd(0x38); //16*2 显示,5*7 点阵,8 位数据接口
LcdWriteCmd(0x0C); //显示器开,光标关闭
LcdWriteCmd(0x06); //文字不动,地址自动+1
LcdWriteCmd(0x01); //清屏
}
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温馨提示
ADC0832程序 步进电机程序 LCD1602程序封装成2个易调用的函数 // LcdShowStr(0,Di_1_Hang, table1);//第1行从0开始显示learn exchange // LcdShowStr(0,Di_2_Hang, table2);//第2行从0开始显示grow together // LcdShowOneChar(14, Di_1_Hang, '!');//在第一行14位置插入! // LcdShowOneChar(13, Di_2_Hang, '!');//在第二行13位置插入!
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