stm32驱动lcd1602
时间: 2023-10-06 07:09:32 浏览: 84
实现步骤:
1. 确认STM32的引脚和LCD1602的引脚对应关系。
2. 初始化GPIO口,将所使用的引脚设为输出模式。
3. 根据LCD1602的数据手册,写出需要使用的指令。指令包括清屏、设置光标位置、设置显示模式等。
4. 写出相应的函数来发送指令和数据到LCD1602,包括初始化函数、清屏函数、显示字符函数等。
5. 调用函数来控制LCD1602的显示效果。
以下是C语言代码示例:
```c
#include "stm32f10x.h"
#define LCD_RS GPIO_Pin_0 //LCD_RS对应的引脚
#define LCD_EN GPIO_Pin_1 //LCD_EN对应的引脚
#define LCD_D4 GPIO_Pin_2 //LCD_D4对应的引脚
#define LCD_D5 GPIO_Pin_3 //LCD_D5对应的引脚
#define LCD_D6 GPIO_Pin_4 //LCD_D6对应的引脚
#define LCD_D7 GPIO_Pin_5 //LCD_D7对应的引脚
#define LCD_PORT GPIOB //LCD所使用的GPIO口
void LCD_Init(void);
void LCD_SendByte(unsigned char byte, unsigned char mode);
void LCD_Clear(void);
void LCD_SetCursor(unsigned char row, unsigned char col);
void LCD_PrintString(unsigned char row, unsigned char col, char *str);
int main(void)
{
LCD_Init(); //LCD初始化
LCD_Clear(); //清屏
LCD_PrintString(0, 0, "Hello, World!"); //在第一行第一列显示字符串
while (1)
{
//程序主循环
}
}
void LCD_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
//使能GPIOB时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
//GPIO配置为输出模式
GPIO_InitStructure.GPIO_Pin = LCD_RS | LCD_EN | LCD_D4 | LCD_D5 | LCD_D6 | LCD_D7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(LCD_PORT, &GPIO_InitStructure);
//初始化LCD
LCD_SendByte(0x33, 0);
LCD_SendByte(0x32, 0);
LCD_SendByte(0x28, 0);
LCD_SendByte(0x0C, 0);
LCD_SendByte(0x06, 0);
LCD_SendByte(0x01, 0);
}
void LCD_SendByte(unsigned char byte, unsigned char mode)
{
GPIO_WriteBit(LCD_PORT, LCD_RS, (BitAction)mode); //设置RS引脚状态
GPIO_WriteBit(LCD_PORT, LCD_EN, Bit_SET); //使能LCD
GPIO_WriteBit(LCD_PORT, LCD_D4, (BitAction)(byte >> 4)); //发送高4位数据
GPIO_WriteBit(LCD_PORT, LCD_D5, (BitAction)(byte >> 5));
GPIO_WriteBit(LCD_PORT, LCD_D6, (BitAction)(byte >> 6));
GPIO_WriteBit(LCD_PORT, LCD_D7, (BitAction)(byte >> 7));
GPIO_WriteBit(LCD_PORT, LCD_EN, Bit_RESET); //停止使能
GPIO_WriteBit(LCD_PORT, LCD_D4, (BitAction)(byte & 0x0F)); //发送低4位数据
GPIO_WriteBit(LCD_PORT, LCD_D5, (BitAction)((byte >> 1) & 0x0F));
GPIO_WriteBit(LCD_PORT, LCD_D6, (BitAction)((byte >> 2) & 0x0F));
GPIO_WriteBit(LCD_PORT, LCD_D7, (BitAction)((byte >> 3) & 0x0F));
GPIO_WriteBit(LCD_PORT, LCD_EN, Bit_SET); //使能LCD
GPIO_WriteBit(LCD_PORT, LCD_EN, Bit_RESET); //停止使能
}
void LCD_Clear(void)
{
LCD_SendByte(0x01, 0); //清屏指令
}
void LCD_SetCursor(unsigned char row, unsigned char col)
{
unsigned char address;
if (row == 0)
{
address = 0x80 + col; //第一行
}
else
{
address = 0xC0 + col; //第二行
}
LCD_SendByte(address, 0); //设置光标位置
}
void LCD_PrintString(unsigned char row, unsigned char col, char *str)
{
LCD_SetCursor(row, col);
while (*str)
{
LCD_SendByte(*str++, 1); //逐个发送字符
}
}
```
以上代码为使用STM32驱动LCD1602的基本实现,可根据具体需求进行修改。