Power-Pico/software/bootloader/BSP/EEPROM/BL24C02.c

#include "BL24C02.h"
#include "i2c.h"

SysSettings_T sys_settings = {
	.backlight_level = 50,
	.key_sound_enable = 1,
	.language_select = 0,
	.rotation = 0
};

static void BL24C02_Write(uint8_t addr, uint16_t length, uint8_t buff[])
{
	HAL_I2C_Mem_Write(&hi2c1, BL24C02_ADDRESS<<1, addr, I2C_MEMADD_SIZE_8BIT, buff, length, 10);
}

static void BL24C02_Read(uint8_t addr, uint8_t length, uint8_t buff[])
{
	HAL_I2C_Mem_Read(&hi2c1, BL24C02_ADDRESS<<1, addr, I2C_MEMADD_SIZE_8BIT, buff, length, 10);
}

static void delay_ms(uint32_t ms)
{
	HAL_Delay(ms);
}

/******************************************
EEPROM Data description:
[0x00]: 0x55 for check
[0x01]: 0xAA for check

[0x10]: user backlight_level setting
[0x11]: user key_sound_enable setting
[0x12]: user language_select setting
[0x13-14]: user rotation setting

[0x20-]: update command storage area, "update\r\n"
*******************************************/

// to check the Data is right and the EEPROM is working, 0-ok, 1-erro
uint8_t EEPROM_Init_Check(void)
{
	uint8_t check_buff[2];
	delay_ms(10);
	BL24C02_Read(0,2,check_buff);
	if(check_buff[0] == 0x55 && check_buff[1] == 0xAA)
	{
		return 0;//check OK
	}
	else
	{
		check_buff[0] = 0x55;
		check_buff[1] = 0xAA;
		delay_ms(10);
		BL24C02_Write(0,2,check_buff);
		memset(check_buff,0,2);
		delay_ms(10);
		BL24C02_Read(0,2,check_buff);
		if(check_buff[0] == 0x55 && check_buff[1] == 0xAA)
			return 0;//check ok
	}
	return 1;//check erro
}


// to Save the settings
void EEPROM_SysSetting_Save(void)
{
	uint8_t buff[5];
	buff[0] = sys_settings.backlight_level;
	buff[1] = sys_settings.key_sound_enable;
	buff[2] = sys_settings.language_select;
	buff[3] = (uint8_t)(sys_settings.rotation & 0x00FF);
	buff[4] = (uint8_t)((sys_settings.rotation >> 8) & 0x00FF);
	BL24C02_Write(0x10,5,buff);
}


// to Get the settings
void EEPROM_SysSetting_Get(void)
{
	uint8_t buff[5];
	BL24C02_Read(0x10,5,buff);
	// 判断是否在范围内
	if(buff[0] <= 100)
		sys_settings.backlight_level = buff[0];
	else
		sys_settings.backlight_level = 80;
	if(buff[1] <= 1)
		sys_settings.key_sound_enable = buff[1];
	else
		sys_settings.key_sound_enable = 1;
	if(buff[2] <= 1)
		sys_settings.language_select = buff[2];
	else
		sys_settings.language_select = 0;
	uint16_t rotation = (uint16_t)buff[3] | ((uint16_t)buff[4] << 8);
	if(rotation == 0 || rotation == 90 || rotation == 180 || rotation == 270)
		sys_settings.rotation = rotation;
	else
		sys_settings.rotation = 180;
}

// to write the update command
void EEPROM_UpdateCommand_Write(bool is_update)
{
	if(is_update) {
		char cmd[] = "update\r\n";
		BL24C02_Write(0x20, strlen(cmd), (uint8_t *)cmd);
	} else {
		char cmd[] = "-nope-\r\n";
		BL24C02_Write(0x20, strlen(cmd), (uint8_t *)cmd);
	}
}

// to check the update command
bool EEPROM_UpdateCommand_Check(void)
{
	char cmd[10] = {0};
	BL24C02_Read(0x20, 8, (uint8_t *)cmd);
	if(strcmp(cmd, "update\r\n") == 0) {
		return true;
	} else {
		return false;
	}
}