99 lines
3.0 KiB
C
99 lines
3.0 KiB
C
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/*
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* AT24C16.c
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*
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* Created on: Sep 26, 2024
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* Author: 10425
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*/
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#include "user.h"
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/**
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* @brief 写入一个字节到 AT24C16
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* @param mem_address EEPROM 的目标地址
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* @param data 要写入的数据
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* @return HAL 状态
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*/
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HAL_StatusTypeDef AT24C16_WriteByte(uint16_t mem_address, uint8_t data)
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{
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return HAL_I2C_Mem_Write(&I2C_HANDLE, AT24C16_ADDR << 1, mem_address, I2C_MEMADD_SIZE_16BIT, &data, 1, AT24C16_TIMEOUT);
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}
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/**
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* @brief 从 AT24C16 读取一个字节
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* @param mem_address EEPROM 的目标地址
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* @param data 用于存放读取数据的指针
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* @return HAL 状态
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*/
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HAL_StatusTypeDef AT24C16_ReadByte(uint16_t mem_address, uint8_t *data)
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{
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return HAL_I2C_Mem_Read(&I2C_HANDLE, AT24C16_ADDR << 1, mem_address, I2C_MEMADD_SIZE_16BIT, data, 1, AT24C16_TIMEOUT);
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}
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/**
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* @brief 从 AT24C16 写入多个字节
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* @param mem_address EEPROM 的目标地址
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* @param data 要写入的数据指针
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* @param size 要写入的字节数
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* @return HAL 状态
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*/
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HAL_StatusTypeDef AT24C16_WriteBytes(uint16_t mem_address, uint8_t *data, uint16_t size)
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{
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HAL_StatusTypeDef status;
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uint16_t bytes_written = 0;
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uint16_t current_page_size;
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// 写入多个字节，考虑跨页问题
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while (bytes_written < size)
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{
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// 计算当前页的剩余字节数，确保不会超出页面边界
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current_page_size = AT24C16_PAGE_SIZE - (mem_address % AT24C16_PAGE_SIZE);
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// 如果当前数据剩余量小于当前页大小，则写入剩余数据量
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if (size - bytes_written < current_page_size)
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current_page_size = size - bytes_written;
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// 向当前页写入数据
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status = HAL_I2C_Mem_Write(&I2C_HANDLE, AT24C16_ADDR<<1, mem_address,
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I2C_MEMADD_SIZE_8BIT, data + bytes_written, current_page_size, AT24C16_TIMEOUT);
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if (status != HAL_OK)
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return status; // 如果写入失败，立即返回错误
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// 更新地址和已写入的字节数
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mem_address += current_page_size;
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bytes_written += current_page_size;
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// EEPROM 写入需要等待写周期，确保数据已写入
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HAL_Delay(5); // 根据 AT24C16 数据手册，写入周期一般为 5ms
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}
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return HAL_OK;
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}
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/**
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* @brief 从 AT24C16 读取多个字节
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* @param mem_address EEPROM 的目标地址
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* @param data 用于存放读取数据的指针
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* @param size 要读取的字节数
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* @return HAL 状态
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*/
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HAL_StatusTypeDef AT24C16_ReadBytes(uint16_t mem_address, uint8_t *data, uint16_t size)
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{
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return HAL_I2C_Mem_Read(&I2C_HANDLE, AT24C16_ADDR << 1, mem_address, I2C_MEMADD_SIZE_8BIT, data, size, HAL_MAX_DELAY);
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}
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/**
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* @brief 初始化 AT24C16 驱动
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* @return HAL 状态
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*/
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HAL_StatusTypeDef AT24C16_Init(void)
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{
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// 此函数可以包含特定的初始化代码，通常包括对 I²C 的配置和校验
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if (HAL_I2C_IsDeviceReady(&I2C_HANDLE, AT24C16_ADDR << 1, 3,AT24C16_TIMEOUT) != HAL_OK)
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{
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return HAL_ERROR; // 如果设备未准备好则返回错误
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}
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return HAL_OK;
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}
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