使用stm32f407写一个mlx90614的代码

以下是使用 STM32F407 写的 MLX90614 代码：

#include "stm32f4xx.h"
#include "stdio.h"
#include "stdlib.h"
#include "string.h"

#define I2C_TIMEOUT 10000

#define MLX90614_I2C_ADDRESS 0x5A << 1

#define MLX90614_TA 0x06
#define MLX90614_TOBJ1 0x07
#define MLX90614_TOBJ2 0x08

I2C_HandleTypeDef hi2c1;

void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_I2C1_Init(void);
void MX_USART2_UART_Init(void);

void I2C_WriteByte(uint8_t DevAddress, uint8_t RegAddress, uint8_t data)
{
    HAL_StatusTypeDef status;

    status = HAL_I2C_Mem_Write(&hi2c1, DevAddress, RegAddress, I2C_MEMADD_SIZE_8BIT, &data, 1, I2C_TIMEOUT);

    if (status != HAL_OK)
    {
        printf("Error: %d\n", status);
    }
}

uint8_t I2C_ReadByte(uint8_t DevAddress, uint8_t RegAddress)
{
    uint8_t data;
    HAL_StatusTypeDef status;

    status = HAL_I2C_Mem_Read(&hi2c1, DevAddress, RegAddress, I2C_MEMADD_SIZE_8BIT, &data, 1, I2C_TIMEOUT);

    if (status != HAL_OK)
    {
        printf("Error: %d\n", status);
    }

    return data;
}

int main(void)
{
    HAL_Init();
    SystemClock_Config();

    MX_GPIO_Init();
    MX_I2C1_Init();
    MX_USART2_UART_Init();

    uint8_t data[3];
    float temp;

    while (1)
    {
        data[0] = I2C_ReadByte(MLX90614_I2C_ADDRESS, MLX90614_TA);
        data[1] = I2C_ReadByte(MLX90614_I2C_ADDRESS, MLX90614_TOBJ1);
        data[2] = I2C_ReadByte(MLX90614_I2C_ADDRESS, MLX90614_TOBJ2);

        temp = (float)data[0] * 0.02 - 273.15;
        printf("TA: %.2f\n", temp);

        temp = (float)(data[1] | data[2] << 8) * 0.02 - 273.15;
        printf("TOBJ1: %.2f\n", temp);

        HAL_Delay(1000);
    }
}

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

    /** Configure the main internal regulator output voltage 
    */
    __HAL_RCC_PWR_CLK_ENABLE();
    __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
    /** Initializes the CPU, AHB and APB busses clocks 
    */
    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
    RCC_OscInitStruct.HSEState = RCC_HSE_ON;
    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
    RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
    RCC_OscInitStruct.PLL.PLLM = 25;
    RCC_OscInitStruct.PLL.PLLN = 336;
    RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
    RCC_OscInitStruct.PLL.PLLQ = 7;
    if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
    {
        Error_Handler();
    }
    /** Initializes the CPU, AHB and APB busses clocks 
    */
    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_DIV4;
    RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;

    if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK)
    {
        Error_Handler();
    }
}

static void MX_I2C1_Init(void)
{

    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();
    }
}

void MX_USART2_UART_Init(void)
{

    huart2.Instance = USART2;
    huart2.Init.BaudRate = 115200;
    huart2.Init.WordLength = UART_WORDLENGTH_8B;
    huart2.Init.StopBits = UART_STOPBITS_1;
    huart2.Init.Parity = UART_PARITY_NONE;
    huart2.Init.Mode = UART_MODE_TX_RX;
    huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
    huart2.Init.OverSampling = UART_OVERSAMPLING_16;
    if (HAL_UART_Init(&huart2) != HAL_OK)
    {
        Error_Handler();
    }
}

static void MX_GPIO_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStruct = {0};

    __HAL_RCC_GPIOA_CLK_ENABLE();

    HAL_GPIO_WritePin(GPIOA, GPIO_PIN_0, GPIO_PIN_SET);

    GPIO_InitStruct.Pin = GPIO_PIN_0;
    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}

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

该代码通过 I2C 总线与 MLX90614 通信，读取温度数据并打印至串口。代码中使用了 HAL 库进行 I2C 和串口的初始化和读写操作。注意在使用之前需要先初始化 I2C 和串口，并发送地址和命令来读取数据。