STM32基于HAL工程硬件I2C读取AT24Cxx数据

硬件I2C读取AT24Cxx数据"/>

STM32基于HAL工程硬件I2C读取AT24Cxx数据

STM32基于HAL工程硬件I2C读取AT24Cxx数据

• ✨申明：本文章仅发表在CSDN网站，任何其他网站，未注明来源，见此内容均为盗链和爬取，请多多尊重和支持原创!
• 🍁对于文中所提供的相关资源链接将作不定期更换。
• 🎯本工程使用STM32F103VE+AT24C32实物验证没有问题。

• ✨说明：本库文件仅支持容量大于2048Bytes（AT24C16）以上型号的读取,如果使用在小于2048Bytes的器件上，数据首尾会对不上。

• 📖型号和容量参照：

#define AT24C01		127
#define AT24C02		255
#define AT24C04		511
#define AT24C08		1023
#define AT24C16		2047
#define AT24C32		4095
#define AT24C64	    8191
#define AT24C128	16383
#define AT24C256	32767 

📑AT24Cxx地址说明

• 🧲AT24C02/C4/C8/C16的I2C地址取决于引脚A0、A1和A2的电平设置，可以有8个不同的地址。以下是每个地址对应的引脚配置：

0b1010000：A0 = 0，A1 = 0，A2 = 0
0b1010001：A0 = 1，A1 = 0，A2 = 0
0b1010010：A0 = 0，A1 = 1，A2 = 0
0b1010011：A0 = 1，A1 = 1，A2 = 0
0b1010100：A0 = 0，A1 = 0，A2 = 1
0b1010101：A0 = 1，A1 = 0，A2 = 1
0b1010110：A0 = 0，A1 = 1，A2 = 1
0b1010111：A0 = 1，A1 = 1，A2 = 1

• 🔖如果引脚A0-A1-A2都接地，则AT24Cxx的I2C地址为0b1010000（或0x50）。

• 📜测试AT24C32读取的信息串口打印：
  

🛠STM32CubeMX工程配置

• 🔨使能一个I2C接口。（如果选择I2C2,需要在AT24Cxx.h，修改相关宏定义（#define EEPROM_I2C hi2c1）。）
  
• 🔧使能一个串口，用于调试信息输出。
  
• • 🔰printf调试信息输出，需要在usart.c文件中添加printf重映射代码，以及Keil设置勾选MicroLib选项：

#include "stdio.h"
/*可调用printf*/
int fputc(int ch,FILE *f)
{/*&huart1指的是串口1，如果用别的串口就修改数字*/HAL_UART_Transmit(&huart1 , (uint8_t *)&ch , 1 , 1000);return ch;
}

🔖时钟源根据个人具体的STM32型号自己配置。

📋AT24Cxx驱动代码

• 🌿AT24Cxx.c文件

/** AT24Cxx.c**/
#include "AT24Cxx.h"static unsigned eeprom_address = EEPROM_ADDRESS << 1;static unsigned inpage_addr_mask = EEPROM_PAGESIZE - 1;static HAL_StatusTypeDef AT24Cxx_WriteReadEEPROM(unsigned address, const void *src, unsigned len, bool write);
static unsigned size_to_page_end(unsigned addr);HAL_StatusTypeDef AT24Cxx_IsConnected(void)
{return HAL_I2C_IsDeviceReady(&EEPROM_I2C, eeprom_address, 1, EEPROM_TIMEOUT);
}HAL_StatusTypeDef AT24Cxx_ReadEEPROM(unsigned address, const void *src, unsigned len)
{return AT24Cxx_WriteReadEEPROM(address, src, len, false);
}HAL_StatusTypeDef AT24Cxx_WriteEEPROM(unsigned address, const void *src, unsigned len)
{return AT24Cxx_WriteReadEEPROM(address, src, len, true);
}static HAL_StatusTypeDef AT24Cxx_WriteReadEEPROM(unsigned address, const void *src, unsigned len, bool write)
{uint8_t *pdata = (uint8_t *) src;unsigned portion;unsigned max_portion;HAL_StatusTypeDef result = HAL_OK;max_portion = size_to_page_end(address); //发送器件地址0XA0,写数据while (len != 0 && result == HAL_OK){portion = len;if (portion > max_portion){portion = max_portion;}if (write){result = HAL_I2C_Mem_Write(&EEPROM_I2C,eeprom_address,address,I2C_MEMADD_SIZE_16BIT,pdata,portion,EEPROM_TIMEOUT);}else{result = HAL_I2C_Mem_Read(&EEPROM_I2C,eeprom_address,address,I2C_MEMADD_SIZE_16BIT,pdata,portion,EEPROM_TIMEOUT);}len     -= portion;address += portion;pdata   += portion;max_portion = EEPROM_PAGESIZE;if (write){HAL_Delay(EEPROM_WRITE);}else{HAL_Delay(EEPROM_WRITE / 2);}}return result;
}static unsigned size_to_page_end(unsigned addr)
{return (~addr & inpage_addr_mask) + 1;
}

• 🌿AT24Cxx.h文件

/** AT24Cxx.h**/#ifndef AT24CXX_H_
#define AT24CXX_H_#include "stm32f1xx_hal.h"
#include "stdbool.h"#define	EEPROM_I2C			hi2c1
#define EEPROM_ADDRESS		0x50
#define EEPROM_PAGESIZE		128
#define EEPROM_WRITE		10					//time to wait in ms
#define EEPROM_TIMEOUT		5 * EEPROM_WRITE	//timeout while writingextern I2C_HandleTypeDef EEPROM_I2C;HAL_StatusTypeDef AT24Cxx_IsConnected(void);
HAL_StatusTypeDef AT24Cxx_ReadEEPROM(unsigned address, const void* src, unsigned len);
HAL_StatusTypeDef AT24Cxx_WriteEEPROM(unsigned address, const void* src, unsigned len);#endif /* AT24CXX_H_ */

📝main主程序代码

/* USER CODE BEGIN Header */
/********************************************************************************* @file           : main.c* @brief          : Main program body******************************************************************************* @attention** Copyright (c) 2023 STMicroelectronics.* All rights reserved.** This software is licensed under terms that can be found in the LICENSE file* in the root directory of this software component.* If no LICENSE file comes with this software, it is provided AS-IS.********************************************************************************/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "i2c.h"
#include "usart.h"
#include "gpio.h"/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "stdio.h"
#include "AT24Cxx.h"
/* USER CODE END Includes *//* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
#define AT24Cxx_ADDRESS ((uint16_t)0xA0)
/* USER CODE END PTD *//* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD *//* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM *//* USER CODE END PM *//* Private variables ---------------------------------------------------------*//* USER CODE BEGIN PV */
uint8_t Buffer[] = "Hi!STM32F103VE 9527 Perseverance";
#define countof(a) (sizeof(a) / sizeof(*(a)))
#define BufferSize1     (countof(Buffer)-1)
uint8_t Read_Buffer[BufferSize1];
/* USER CODE END PV *//* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP *//* USER CODE END PFP *//* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 *//* USER CODE END 0 *//*** @brief  The application entry point.* @retval int*/
int main(void)
{/* USER CODE BEGIN 1 *//* USER CODE END 1 *//* MCU Configuration--------------------------------------------------------*//* Reset of all peripherals, Initializes the Flash interface and the Systick. */HAL_Init();/* USER CODE BEGIN Init *//* USER CODE END Init *//* Configure the system clock */SystemClock_Config();/* USER CODE BEGIN SysInit *//* USER CODE END SysInit *//* Initialize all configured peripherals */MX_GPIO_Init();MX_I2C1_Init();MX_USART1_UART_Init();/* USER CODE BEGIN 2 */uint32_t TimerUART = HAL_GetTick();if (AT24Cxx_IsConnected() == HAL_OK){printf("AT24Cxx Read success \r\n");AT24Cxx_WriteEEPROM((AT24Cxx_ADDRESS), Buffer, BufferSize1);}/* USER CODE END 2 *//* Infinite loop *//* USER CODE BEGIN WHILE */while (1){/* USER CODE END WHILE *//* USER CODE BEGIN 3 */if ((HAL_GetTick() - TimerUART) > 2500){AT24Cxx_ReadEEPROM((AT24Cxx_ADDRESS), Read_Buffer, BufferSize1);printf("Read_Date=%s\r\n",Read_Buffer );TimerUART = HAL_GetTick();HAL_GPIO_TogglePin(GPIOE, LED_Pin);}}/* USER CODE END 3 */
}/*** @brief System Clock Configuration* @retval None*/
void SystemClock_Config(void)
{RCC_OscInitTypeDef RCC_OscInitStruct = {0};RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};/** Initializes the RCC Oscillators according to the specified parameters* in the RCC_OscInitTypeDef structure.*/RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;RCC_OscInitStruct.HSEState = RCC_HSE_ON;RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;RCC_OscInitStruct.HSIState = RCC_HSI_ON;RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK){Error_Handler();}/** Initializes the CPU, AHB and APB buses clocks*/RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK| RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK){Error_Handler();}
}/* USER CODE BEGIN 4 *//* USER CODE END 4 *//*** @brief  This function is executed in case of error occurrence.* @retval None*/
void Error_Handler(void)
{/* USER CODE BEGIN Error_Handler_Debug *//* User can add his own implementation to report the HAL error return state */__disable_irq();while (1){}/* USER CODE END Error_Handler_Debug */
}#ifdef  USE_FULL_ASSERT
/*** @brief  Reports the name of the source file and the source line number*         where the assert_param error has occurred.* @param  file: pointer to the source file name* @param  line: assert_param error line source number* @retval None*/
void assert_failed(uint8_t *file, uint32_t line)
{/* USER CODE BEGIN 6 *//* User can add his own implementation to report the file name and line number,ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) *//* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */

📚工程源码

• ✨申明：本文章仅发表在CSDN网站，任何其他网站，未注明来源，见此内容均为盗链和爬取，请多多尊重和支持原创!
• 🍁对于文中所提供的相关资源链接将作不定期更换。

链接: 
提取码: i2g9