编写程序使用 IIC 通信方式写入 EEPROM AT24C02 一段字符串，然后读出在 在 PC 机的串口调试助手上stm32f103

以下是使用STM32F103与AT24C02之间通过IIC通信的程序，实现向EEPROM中写入字符串，并通过USART串口将读取到的内容发送到PC机上的串口调试助手：

#include "stm32f10x.h"
#include "stm32f10x_gpio.h"
#include "stm32f10x_i2c.h"
#include "stm32f10x_usart.h"
#include "stdio.h"

#define I2C1_SLAVE_ADDRESS7 0xA0

void I2C_Configuration(void);
void USART_Configuration(void);
void Delay(__IO uint32_t nCount);

int main(void)
{
    uint8_t buff[] = "Hello, World!";
    uint8_t read_buff[20];
    int i;

    USART_Configuration();
    I2C_Configuration();

    /* Start Transfer */
    I2C_GenerateSTART(I2C1, ENABLE);

    /* Test on EV5 and clear it */
    while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));

    /* Send EEPROM address for write */
    I2C_Send7bitAddress(I2C1, I2C1_SLAVE_ADDRESS7, I2C_Direction_Transmitter);

    /* Test on EV6 and clear it */
    while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));

    /* Write to EEPROM */
    for (i = 0; i < sizeof(buff); i++) {
        I2C_SendData(I2C1, buff[i]);

        /* Test on EV8 and clear it */
        while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
    }

    /* Send Stop */
    I2C_GenerateSTOP(I2C1, ENABLE);

    /* Wait for EEPROM to finish writing */
    Delay(0xFFFF);

    /* Start Transfer */
    I2C_GenerateSTART(I2C1, ENABLE);

    /* Test on EV5 and clear it */
    while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));

    /* Send EEPROM address for read */
    I2C_Send7bitAddress(I2C1, I2C1_SLAVE_ADDRESS7, I2C_Direction_Receiver);

    /* Test on EV6 and clear it */
    while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));

    /* Read from EEPROM */
    for (i = 0; i < sizeof(read_buff); i++) {
        /* Test on EV7 and clear it */
        while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED));
        read_buff[i] = I2C_ReceiveData(I2C1);
    }

    /* Send Stop */
    I2C_GenerateSTOP(I2C1, ENABLE);

    /* Send received data to USART */
    for (i = 0; i < sizeof(read_buff); i++) {
        USART_SendData(USART1, read_buff[i]);
        while (USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);
    }

    while(1) {}
}

void I2C_Configuration(void)
{
    I2C_InitTypeDef I2C_InitStructure;
    GPIO_InitTypeDef GPIO_InitStructure;

    /* Enable GPIOB clock */
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

    /* Configure I2C1 pins: SCL and SDA */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
    GPIO_Init(GPIOB, &GPIO_InitStructure);

    /* Enable I2C1 clock */
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);

    /* I2C1 configuration */
    I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
    I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
    I2C_InitStructure.I2C_OwnAddress1 = 0x00;
    I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
    I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
    I2C_InitStructure.I2C_ClockSpeed = 100000;

    /* Apply I2C1 configuration after enabling it */
    I2C_Init(I2C1, &I2C_InitStructure);
    I2C_Cmd(I2C1, ENABLE);
}

void USART_Configuration(void)
{
    USART_InitTypeDef USART_InitStructure;
    GPIO_InitTypeDef GPIO_InitStructure;

    /* Enable GPIOA clock */
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

    /* Enable USART1 clock */
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);

    /* Configure USART1 pins: TX and RX */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    /* USART1 configuration */
    USART_InitStructure.USART_BaudRate = 115200;
    USART_InitStructure.USART_WordLength = USART_WordLength_8b;
    USART_InitStructure.USART_StopBits = USART_StopBits_1;
    USART_InitStructure.USART_Parity = USART_Parity_No;
    USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
    USART_InitStructure.USART_Mode = USART_Mode_Tx;

    /* Apply USART1 configuration after enabling it */
    USART_Init(USART1, &USART_InitStructure);
    USART_Cmd(USART1, ENABLE);
}

void Delay(__IO uint32_t nCount)
{
    for(; nCount != 0; nCount--);
}

在串口调试助手中打开串口，波特率设置为115200，连接STM32F103的USART1引脚（PA9和PA10），运行程序，串口调试助手将会输出从EEPROM中读取到的字符串。