STM32 (基于HAL库) 硬件IIC读写任意AT24CXX芯片

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：

#include "HAL_24Cxx.h"
#include "i2c.h"
#include 

#define IICx hi2c1 //IIC接口
#define AT24C_DEV_WRITEADDR 0xA0 //设备地址
#define AT24C_DEV_READADDR 0xA1 //设备地址

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;
}

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;
}

void HAL_AT24CXX_WriteLenByte(uint16_t WriteAddr,uint8_t *pData,uint8_t dataLen)
{
	while(dataLen--)
	{
		HAL_AT24CXX_WriteOneByte(WriteAddr,*pData);
		WriteAddr++;
		pData++;
	}
}

void HAL_AT24CXX_ReadLenByte(uint16_t ReadAddr,uint8_t *pData,uint8_t dataLen)
{
	while(dataLen--)
	{
		*pData++ = HAL_AT24CXX_ReadOneByte(ReadAddr++);
	}
}

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__

#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：

#include "main.h"
#include "i2c.h"
#include "usart.h"
#include "gpio.h"



#include "HAL_24cxx.h"
#include 























void SystemClock_Config(void);








int fputc(int ch,FILE *f){
 uint8_t temp[1]={ch};
 HAL_UART_Transmit(&huart1,temp,1,2);
 return ch;
}




int main(void)
{
  
	uint8_t buff[6];
	bool res;
  

  

  
  HAL_Init();

  

  

  
  SystemClock_Config();

  

  

  
  MX_GPIO_Init();
  MX_I2C1_Init();
  MX_USART1_UART_Init();
  
	printf("测试程序开始rn");
	
	res = HAL_AT24CXX_Check();
	if(res == true)
	{
		printf("AT24CXX OK!rn");
	}
	else
	{
		printf("AT24CXX ERROR!rn");
	}
	HAL_Delay(1000);
	HAL_AT24CXX_WriteLenByte(0,(uint8_t *)"hello",5);

	HAL_AT24CXX_ReadLenByte(0,buff,5);
	
	printf("buff:%srn",buff);
	
	printf("测试程序结束rn");
  

  
  
  while (1)
  {
    

    
  }
  
}


void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  
  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();
  }

  
  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();
  }
}






void Error_Handler(void)
{
  
  
  __disable_irq();
  while (1)
  {
  }
  
}

#ifdef  USE_FULL_ASSERT

void assert_failed(uint8_t *file, uint32_t line)
{
  
  
  
}
#endif 

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