HAL库F1编写 gpiob0，gpiob1，编写iic通信程序 软件实现

以下是基于HAL库的STM32F1编写GPIOB0、GPIOB1的示例代码：

#include "stm32f1xx_hal.h"

// 定义GPIOB0和GPIOB1的引脚号
#define GPIOB0_PIN 0
#define GPIOB1_PIN 1

int main(void)
{
    // 初始化HAL库
    HAL_Init();

    // 使能GPIOB时钟
    __HAL_RCC_GPIOB_CLK_ENABLE();

    // 配置GPIOB0和GPIOB1为输出模式
    GPIO_InitTypeDef GPIO_InitStruct;
    GPIO_InitStruct.Pin = GPIO_PIN_0 | GPIO_PIN_1;
    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
    HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

    // 设置GPIOB0和GPIOB1的电平
    HAL_GPIO_WritePin(GPIOB, GPIOB0_PIN, GPIO_PIN_SET);
    HAL_GPIO_WritePin(GPIOB, GPIOB1_PIN, GPIO_PIN_RESET);

    // 循环
    while (1)
    {
        // do something
    }
}

以下是基于HAL库的STM32F1编写I2C通信程序的示例代码：

#include "stm32f1xx_hal.h"

// I2C相关定义
#define I2C_ADDR 0x50
#define I2C_TIMEOUT 1000

// I2C引脚定义
#define I2C_SCL_PIN GPIO_PIN_6
#define I2C_SDA_PIN GPIO_PIN_7
#define I2C_GPIO_PORT GPIOB

I2C_HandleTypeDef hi2c1;

// I2C初始化函数
static void MX_I2C1_Init(void)
{
    // 初始化I2C
    hi2c1.Instance = I2C1;
    hi2c1.Init.ClockSpeed = 100000;
    hi2c1.Init.DutyCycle = I2C_DUTYCYCLE_2;
    hi2c1.Init.OwnAddress1 = 0;
    hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
    hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
    hi2c1.Init.OwnAddress2 = 0;
    hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
    hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
    if (HAL_I2C_Init(&hi2c1) != HAL_OK)
    {
        Error_Handler();
    }
}

// I2C写入数据函数
void I2C_WriteData(uint8_t addr, uint8_t *data, uint16_t len)
{
    // 发送I2C起始信号
    HAL_I2C_Master_Transmit_Start(&hi2c1, (uint16_t)(addr << 1), I2C_TIMEOUT);

    // 发送数据
    HAL_I2C_Master_Transmit(&hi2c1, (uint16_t)(addr << 1), data, len, I2C_TIMEOUT);

    // 发送I2C停止信号
    HAL_I2C_Master_Transmit_Stop(&hi2c1, (uint16_t)(addr << 1), I2C_TIMEOUT);
}

int main(void)
{
    // 初始化HAL库
    HAL_Init();

    // 使能GPIOB和I2C1时钟
    __HAL_RCC_GPIOB_CLK_ENABLE();
    __HAL_RCC_I2C1_CLK_ENABLE();

    // 配置I2C的SCL和SDA引脚
    GPIO_InitTypeDef GPIO_InitStruct;
    GPIO_InitStruct.Pin = I2C_SCL_PIN | I2C_SDA_PIN;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
    HAL_GPIO_Init(I2C_GPIO_PORT, &GPIO_InitStruct);

    // 配置I2C
    MX_I2C1_Init();

    // 待写入的数据
    uint8_t data[2] = {0x12, 0x34};

    // 写入数据到I2C设备
    I2C_WriteData(I2C_ADDR, data, sizeof(data));

    // 循环
    while (1)
    {
        // do something
    }
}