Skip to content

Instantly share code, notes, and snippets.

Created Nov 23, 2021
What would you like to do?
* i2c_lcd.h
* Created on: 2021/11/22
* Author: Akihiro Yamamoto
* Copyright 2021 Akihiro Yamamoto
* Licensed under the Apache License, Version 2.0
#ifndef INC_I2C_LCD_H_
extern void i2c_lcd_init(I2C_HandleTypeDef *i2c);
extern void i2c_lcd_send_commands(I2C_HandleTypeDef *hi2c, size_t size,
uint8_t cmds[size]);
inline static void i2c_lcd_send_command(I2C_HandleTypeDef *hi2c, uint8_t cmd) {
i2c_lcd_send_commands(hi2c, 1, &cmd);
extern void i2c_lcd_send_data(I2C_HandleTypeDef *hi2c, size_t size,
uint8_t data[size]);
inline static void i2c_lcd_send_datum(I2C_HandleTypeDef *hi2c, uint8_t datum) {
i2c_lcd_send_data(hi2c, 1, &datum);
extern void i2c_lcd_puts(I2C_HandleTypeDef *hi2c, char *s);
inline static void i2c_lcd_clear_display(I2C_HandleTypeDef *hi2c) {
i2c_lcd_send_command(hi2c, 0b00000001);
inline static void i2c_lcd_return_home(I2C_HandleTypeDef *hi2c) {
i2c_lcd_send_command(hi2c, 0b00000010);
inline static void i2c_lcd_set_ddram_address(I2C_HandleTypeDef *hi2c,
uint8_t addr) {
i2c_lcd_send_command(hi2c, 0x80 | (addr & 0x7f));
typedef uint16_t icon_code_t;
#define I2C_LCD_ICON_a ((icon_code_t)(1<<12))
#define I2C_LCD_ICON_b ((icon_code_t)(1<<11))
#define I2C_LCD_ICON_c ((icon_code_t)(1<<10))
#define I2C_LCD_ICON_d ((icon_code_t)(1<<9))
#define I2C_LCD_ICON_e ((icon_code_t)(1<<8))
#define I2C_LCD_ICON_f ((icon_code_t)(1<<7))
#define I2C_LCD_ICON_g ((icon_code_t)(1<<6))
#define I2C_LCD_ICON_h ((icon_code_t)(1<<5))
#define I2C_LCD_ICON_i ((icon_code_t)(1<<4))
#define I2C_LCD_ICON_j ((icon_code_t)(1<<3))
#define I2C_LCD_ICON_k ((icon_code_t)(1<<2))
#define I2C_LCD_ICON_l ((icon_code_t)(1<<1))
#define I2C_LCD_ICON_m ((icon_code_t)(1<<0))
extern void i2c_lcd_show_icon(I2C_HandleTypeDef *hi2c, icon_code_t bitflag);
#endif /* INC_I2C_LCD_H_ */
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment