HAL任意AT24Cxx芯片读写：
原理我就不讲了，直接实操：
一、配置
1、使用STM32CUBEMX进行引脚配置，IIC配置如下：
2、利用串口进行数据查看，串口配置如下：
3、时钟我们选择最高72MHZ，这里没有硬性要求都可以。
4、配置完成，生成keil工程代码即可。
到此配置完成。
二、代码
编写驱动文件：
HAL_24CXX.c文件代码如下：
/***********************************
适用范围：仅HAL适用
***********************************/
#include "HAL_24Cxx.h"
#include "i2c.h"
#include <stdio.h>
#define IICx hi2c1 //IIC接口
#define AT24C_DEV_WRITEADDR 0xA0 //设备地址
#define AT24C_DEV_READADDR 0xA1 //设备地址
/*****************************************
函数名：void HAL_AT24CXX_WriteOneByte(uint16_t WriteAddr,uint8_t WriteData)
参数：WriteAddr :要写入数据的地址 WriteData：要写入的数据
功能描述：在指定地址写入一个字节数据
返回值：无
*****************************************/
uint8_t HAL_AT24CXX_WriteOneByte(uint16_t WriteAddr,uint8_t WriteData)
{
uint8_t res = 0xff;
if(EE_TYPE < AT24C16)
{
if(HAL_I2C_Mem_Write(&IICx,AT24C_DEV_WRITEADDR,WriteAddr,I2C_MEMADD_SIZE_8BIT,&WriteData,1,0xff) == HAL_OK)
res = 0;
}
else
if(HAL_I2C_Mem_Write(&IICx,AT24C_DEV_WRITEADDR,WriteAddr,I2C_MEMADD_SIZE_16BIT,&WriteData,1,0xff) == HAL_OK)
res = 0;
HAL_Delay(10);
return res;
}
/*****************************************
函数名：uint8_t HAL_AT24CXX_ReadOneByte(uint16_t ReadAddr)
参数： ReadAddr：要读取数据的地址
功能描述：在指定地址读取一个字节数据
返回值：返回读取地址的数据
*****************************************/
uint8_t HAL_AT24CXX_ReadOneByte(uint16_t ReadAddr)
{
uint8_t rxData = 0;
if(EE_TYPE < AT24C16)
{
HAL_I2C_Mem_Read(&IICx,AT24C_DEV_READADDR,ReadAddr,I2C_MEMADD_SIZE_8BIT,&rxData,1,0xff);
}
else
HAL_I2C_Mem_Read(&IICx,AT24C_DEV_READADDR,ReadAddr,I2C_MEMADD_SIZE_16BIT,&rxData,1,0xff);
HAL_Delay(10);
return rxData;
}
/*****************************************
函数名：void HAL_AT24CXX_WriteLenByte(uint16_t WriteAddr,uint8_t *pData,uint8_t dataLen)
参数：WriteAddr :要写入数据的地址 pData：要写入的数据的首地址 datalen：要写入数据的长度
功能描述：从指定地址开始写入多个字节数据
返回值：无
*****************************************/
void HAL_AT24CXX_WriteLenByte(uint16_t WriteAddr,uint8_t *pData,uint8_t dataLen)
{
while(dataLen--)
{
HAL_AT24CXX_WriteOneByte(WriteAddr,*pData);
WriteAddr++;
pData++;
}
}
/*****************************************
函数名：void HAL_AT24CXX_ReadLenByte(uint16_t ReadAddr,uint8_t *pData,uint8_t dataLen)
参数： ReadAddr：要读取数据的地址 pData：回填数据首地址 dataLen:数据长度
功能描述：从指定地址开始读取多个个字节数据
返回值：无
*****************************************/
void HAL_AT24CXX_ReadLenByte(uint16_t ReadAddr,uint8_t *pData,uint8_t dataLen)
{
while(dataLen--)
{
*pData++ = HAL_AT24CXX_ReadOneByte(ReadAddr++);
}
}
/*****************************************
函数名：uint8_t HAL_AT24CXX_Check(void)
参数：无
功能描述：检查AT24CXX是否正常，这里用了24XX的最后一个地址(255)来存储标志字.如果用其他24C系列,这个地址要修改
返回值：检测成功返回0 失败返回1
*****************************************/
bool HAL_AT24CXX_Check(void)
{
uint8_t temp;
temp = HAL_AT24CXX_ReadOneByte(EE_TYPE);//避免每次开机都写AT24CXX
if(temp == 0XAB)
return true;
else//排除第一次初始化的情况
{
HAL_AT24CXX_WriteOneByte(EE_TYPE,0XAB);
temp = HAL_AT24CXX_ReadOneByte(EE_TYPE);
if(temp == 0XAB)
return true;
}
return false;
}
HAL_24CXX.c文件代码如下：
#ifndef HAL_24CXX_H__
#define HAL_24CXX_H__
/*****************************************
本驱动文件仅适配HAL库版本
******************************************/
#include "stm32f1xx_hal.h" //链接HAL库
typedef enum
{
false,
true,
}bool;
#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
//我使用的是AT24C128
#define EE_TYPE AT24C128
uint8_t HAL_AT24CXX_ReadOneByte(uint16_t ReadAddr);
uint8_t HAL_AT24CXX_WriteOneByte(uint16_t WriteAddr,uint8_t WriteData);
void HAL_AT24CXX_WriteLenByte(uint16_t WriteAddr,uint8_t *pData,uint8_t dataLen);
void HAL_AT24CXX_ReadLenByte(uint16_t ReadAddr,uint8_t *pData,uint8_t dataLen);
bool HAL_AT24CXX_Check(void);
#endif
三、示例演示：
代码如下：
/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file : main.c
* @brief : Main program body
******************************************************************************
* @attention
*
* Copyright (c) 2022 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 "HAL_24cxx.h"
#include <stdio.h>
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
/* 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 */
/* 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 */
/*****************************************
函数名：
参数：无
功能描述：printf输出重定向到串口1
返回值：
*****************************************/
int fputc(int ch,FILE *f){
uint8_t temp[1]={ch};
HAL_UART_Transmit(&huart1,temp,1,2);
return ch;
}
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
uint8_t buff[6];
bool res;
/* 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 */
printf("测试程序开始\r\n");
res = HAL_AT24CXX_Check();
if(res == true)
{
printf("AT24CXX OK!\r\n");
}
else
{
printf("AT24CXX ERROR!\r\n");
}
HAL_Delay(1000);
HAL_AT24CXX_WriteLenByte(0,(uint8_t *)"hello",5);
HAL_AT24CXX_ReadLenByte(0,buff,5);
printf("buff:%s\r\n",buff);
printf("测试程序结束\r\n");
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* 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 */
最终效果如下：
从图可以看出 测试成功。
完整工程链接：https://pan.baidu.com/s/1Xpw1AlGn-GOLxzSUf4UegQ 提取码: xtms
