AT24C16-STM32-HAL库函数读写_#define at24c16 0xa0

AT24C16的地址

可以看到，16的数据地址是11位，器件地址的P2/P1/P0也是数据地址的一部分.

STM32的硬件I2C只有7/10BIT两种模式，因此本程序用7BIT实现。

函数实现

头文件

#ifndef _AT24C16_H_
#define _AT24C16_H_
 
#include "main.h"
 
#define AT24C16_DEVICE_ADDRESS 0xA0 // AT24C16的IIC地址
 
uint16_t AT24C16_ADDRESS_2(uint16_t page, uint16_t bit);
 
HAL_StatusTypeDef AT24C16_Write(uint16_t address, uint8_t *data, uint16_t size);
 
HAL_StatusTypeDef AT24C16_Read(uint16_t address, uint8_t *rx_buffer, uint16_t size);
 
HAL_StatusTypeDef AT24C16_Write_String(uint16_t address, uint8_t *data);
 
HAL_StatusTypeDef AT24C16_Read_String(uint16_t address, uint8_t *data, uint16_t size);
 
#endif

at24c16.c

#include "main.h"
#include "i2c.h"
#include "gpio.h"
#include "at24c16.h"
#include "stddef.h"
/*
 *	地址转换，将十进制地址转换成二进制地址
 *	@page:页数
 *  @bit:字节位
 */
uint16_t AT24C16_ADDRESS_2(uint16_t page, uint16_t bit)
{
	return ((page << 4) | bit);
}
/*
 *	写函数
 *	@address:二进制地址
 * 	@data:数据地址
 *  @size:数量
 */
HAL_StatusTypeDef AT24C16_Write(uint16_t address, uint8_t *data, uint16_t size)
{
	HAL_StatusTypeDef state = HAL_OK;
	uint8_t add = ((address >> 7) & 0x000e);
	add = AT24C16_DEVICE_ADDRESS | add;
	state = HAL_I2C_Mem_Write(&hi2c1, add, (uint8_t)address, I2C_MEMADD_SIZE_8BIT, data, size, 100);
	return state;
}
/*
 *	读函数
 *	@address:二进制地址
 * 	@data:数据地址
 *  @size:数量
 */
HAL_StatusTypeDef AT24C16_Read(uint16_t address, uint8_t *rx_buffer, uint16_t size)
{
	HAL_StatusTypeDef state = HAL_OK;
	uint8_t add = ((address >> 7) & 0x000e);
	add = AT24C16_DEVICE_ADDRESS | add;
	state = HAL_I2C_Mem_Read(&hi2c1, add, (uint8_t)address, I2C_MEMADD_SIZE_8BIT, rx_buffer, size, 100);
	return state;
}
/*
 *	连续写函数,没有实现任意字节
 *	@address:地址（简单实现连续页）
 *	@data:数据地址
 */
HAL_StatusTypeDef AT24C16_Write_String(uint16_t address, uint8_t *data)
{
	HAL_StatusTypeDef state = HAL_OK;
	uint16_t i = sizeof(data) / 16;
	(sizeof(data) % 16 != 0) ? i++ : 0;
	uint16_t j = address >> 4;
	for (int k = 0; k < i; k++)
	{
		state = AT24C16_Write(AT24C16_ADDRESS_2(j + k, 0), (uint8_t *)&data[i * 16], 16);
	}
	return state;
}
 
/*
 *	连续读函数,没有实现任意字节
 *	@address:地址（简单实现连续页）
 *	@data:数据地址
 *  @size:数量
 */
HAL_StatusTypeDef AT24C16_Read_String(uint16_t address, uint8_t *data, uint16_t size)
{
	HAL_StatusTypeDef state = HAL_OK;
	uint16_t i = size / 16;
	(size % 16 != 0) ? i++ : 0;
	uint16_t j = address >> 4;
	for (int k = 0; k < i; k++)
	{
		state = AT24C16_Read(AT24C16_ADDRESS_2(j + k, 0), (uint8_t *)&data[i * 16], 16);
	}
	return state;
}

调用方法 

注意

连续读写函数只进行了601个字节的测试！