2、STM32：LCD1602.c
#include "LCD1602.h"
#include "delay.h"//程序中的延时函数根据自己32单片机来就行
void hc595SendData(unsigned char sendVal){
unsigned char i;
//从CPU中向595一位一位发送，595一位一位接收
for(i = 0; i 8; i++)
{
if((sendVal <0x80)
MOSIO = 1;
else MOSIO = 0;
S_CLK = 0;
S_CLK = 1;
}
//CPU发送完后，R_CLK将数据并行输出，
//实现了只占用CPU一个输出口就可以输出8bit数据
R_CLK = 0;
R_CLK = 1;
}
void LCD1602_write_com(unsigned char com) {
hc595SendData(com);
LCD_RS_0;
LCD_EN_0;
delay_ms(10);
LCD_EN_1;
}
void LCD1602_write_data(unsigned char date) {
hc595SendData(date);
LCD_RS_1;
LCD_EN_0;
delay_ms(10);
LCD_EN_1;
}
void LCD1602_Init(void) {
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC, ENABLE );
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP; //推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Pin = LCD_RS_PIN | LCD_EN_PIN | GPIO_Pin_0;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP; //推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5;
GPIO_Init(GPIOC, &GPIO_InitStructure);
LCD1602_write_com(0x01);
LCD1602_write_com(0x38);
LCD1602_write_com(0x0C);//开显示，不需要光标
LCD1602_write_com(0x06);
}
void LCD1602_Clear(void){
LCD1602_write_com(0x01);
}
void LCD1602_ShowChar(unsigned char xpos,unsigned char ypos,char xsz) {
ypos%=2;
if(ypos==0)
{
LCD1602_write_com(0x80+xpos);
}
else
{
LCD1602_write_com(0x80+0x40+xpos);
}
LCD1602_write_data(xsz);
}
void LCD1602_ShowLineStr(unsigned char xpos,unsigned char ypos,char *p){
unsigned char i=0;
if(ypos>1 || xpos>=16)return;
while(*p!='\0' && i<16 && xpos<16)
{
i++;
LCD1602_ShowChar(xpos++,ypos,*p++);
delay_us(500);
}
}
void LCD1602_ShowStr(unsigned char xpos,unsigned char ypos,char *p){
if(ypos>1)return;
while(*p!='\0')
{
LCD1602_ShowChar(xpos++,ypos,*p++);
if(*p=='\n')//当检测到换行符时，进行换行检测
{
xpos=0;
ypos++;
p++;
}
}
} |
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