/**?to?control?the?LCD1602?**/

#include?“i2c-lcd.h“
extern?I2C_HandleTypeDef?hi2c1;??//?choose?the?i2c1

#define?SLAVE_ADDRESS_LCD?0x4E?//?change?this?according?to?a0?a1?a2?from?PCF8574

void?lcd_send_cmd?（char?cmd）
{
??char?data_u?data_l;
	uint8_t?data_t[4];
	data_u?=?（cmd&0xf0）;
	data_l?=?（（cmd<<4）&0xf0）;
	data_t[0]?=?data_u|0x0C;??//en=1?rs=0
	data_t[1]?=?data_u|0x08;??//en=0?rs=0
	data_t[2]?=?data_l|0x0C;??//en=1?rs=0
	data_t[3]?=?data_l|0x08;??//en=0?rs=0
	HAL_I2C_Master_Transmit?（&hi2c1?SLAVE_ADDRESS_LCD（uint8_t?*）?data_t?4?100）;
}

void?lcd_send_data?（char?data）
{
	char?data_u?data_l;
	uint8_t?data_t[4];
	data_u?=?（data&0xf0）;
	data_l?=?（（data<<4）&0xf0）;
	data_t[0]?=?data_u|0x0D;??//en=1?rs=0
	data_t[1]?=?data_u|0x09;??//en=0?rs=0
	data_t[2]?=?data_l|0x0D;??//en=1?rs=0
	data_t[3]?=?data_l|0x09;??//en=0?rs=0
	HAL_I2C_Master_Transmit?（&hi2c1?SLAVE_ADDRESS_LCD（uint8_t?*）?data_t?4?100）;
}

void?lcd_init?（void）
{
uint8_t?i=0;
HAL_Delay（100）;
for（i=0;i<3;i++）//sending?3?times:?select?4-bit?mode
{
lcd_send_cmd（0x03）;
HAL_Delay（45）;
}
lcd_send_cmd?（0x02）;
HAL_Delay（100）;
lcd_send_cmd?（0x28）;
HAL_Delay（1）;
lcd_send_cmd?（0x0c）;
HAL_Delay（1）;
lcd_send_cmd?（0x80）;
HAL_Delay（1）;
}

void?lcd_send_string?（char?*str）
{
	while?（*str）?lcd_send_data?（*str++）;
}

/************************?chen?ziang?*****END?OF?FILE****/

?屬性????????????大小?????日期????時(shí)間???名稱(chēng)
-----------?---------??----------?-----??----
?????文件?????????258??2018-08-04?17:12??i2c-lcd.h
?????文件????????1409??2018-08-04?17:48??i2c-lcd.c