蓝桥杯嵌入式赛道复习笔记8(eeprom读写)

原理学习

自己看一下江科大的存储器的读取，原理是一样的。只是使用了IIC原理是不变的

代码

cubeMX的配置

代码 

eeprom层代码的书写

#include "eeprom_display.h"
uint8_t data;
uint8_t eeprom_read(uint8_t addr){
	I2CStart();
	I2CSendByte(0xa0);
	I2CWaitAck();
	I2CSendByte(addr);
	I2CWaitAck();
	I2CStop();
	
	I2CStart();
	I2CSendByte(0xa1);
	I2CWaitAck();
	data=I2CReceiveByte();
	I2CSendNotAck();
	I2CStop();
	return data;
	
}
void eeprom_write(uint8_t addr,uint8_t dat){
	I2CStart();
	I2CSendByte(0xa0);
	I2CWaitAck();
	I2CSendByte(addr);
	I2CWaitAck();
	I2CSendByte(dat);
	I2CWaitAck();
	I2CStop();
	
	HAL_Delay(20);
	
}

main.c

	LCD_Init();
	I2CInit();
	LCD_SetBackColor(Black);
	LCD_SetTextColor(White);
	LCD_Clear(Black);
	char buff[20];
	uint8_t num_cin=1;
	uint8_t num_cout=0;
	RTC_TimeTypeDef sTime = {0};
  RTC_DateTypeDef sDate = {0};
	char date_time[100];
  while (1)
  {
    HAL_RTC_GetTime(&hrtc, &sTime, RTC_FORMAT_BIN);
	  HAL_RTC_GetDate(&hrtc, &sDate, RTC_FORMAT_BIN);
		sprintf(date_time, "      test          ");
	LCD_DisplayStringLine(Line0, (uint8_t *)date_time);
	  sprintf(date_time,"Date %d-%d-%d-%d",sDate.Year,sDate.Month,sDate.WeekDay,sDate.Date);
		LCD_DisplayStringLine(Line2,(uint8_t *)date_time);
		sprintf(date_time,"Time %2d-%2d-%2d",sTime.Hours,sTime.Minutes,sTime.Seconds);
		LCD_DisplayStringLine(Line3,(uint8_t *)date_time);
		sprintf(date_time,"Alarm %d",count_alarm);
		LCD_DisplayStringLine(Line4,(uint8_t *)date_time);
//		eeprom_write(0,num_cin);
//		sprintf(buff,"cin  number %d",num_cin);
//		LCD_DisplayStringLine(Line2,(uint8_t *)buff);
//		num_cout=eeprom_read(0);
//		sprintf(buff,"cout number %d",num_cout);
//		LCD_DisplayStringLine(Line3,(uint8_t *)buff);
//		num_cin++;
//		HAL_Delay(1000);
		
		//HAL_PWREx_DisableUSBDeadBatteryPD();
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
  }
  /* USER CODE END 3 */
}