stm32标准库iIC读多个数据代码

在STM32系列微控制器中，使用标准I2C库（ HAL_I2C_MultipleRead() 函数）来读取多个数据通常涉及以下几个步骤：

#include "stm32f1xx_hal.h"
#include "stm32f1xx_hal_i2c.h"

void read_multiple_data(I2C_HandleTypeDef *hi2c, uint8_t slave_address, uint16_t num_of_elements, uint16_t *data_array)
{
    I2C_DMATransferTypeDef dmaBuffer;
    uint16_t data_temp = 0;

    // 配置I2C传输参数
    hi2c->Instance->CR1 &= ~(I2C_CR1_DIR | I2C_CR1_STOP);
    hi2c->Instance->CR1 |= I2C_CR1_START; // 发送起始信号
    hi2c->Instance->DR = slave_address << 1; // 写入从地址

    // 开启DMA传输
    dmaBuffer.Channel = hi2c->hdmatx->Channel;
    dmaBuffer.Direction = DMA_MEMORY_TO_PERIPH;
    dmaBuffer.PeriphInc = DMA_PINC_DISABLE;
    dmaBuffer.MemInc = DMA_MINC_ENABLE;
    dmaBuffer.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
    dmaBuffer.MemDataAlignment = DMA_MDATAALIGN_BYTE;
    dmaBuffer.Mode = DMA_NORMAL;
    dmaBuffer.Priority = DMA_PRIORITY_HIGH;
    dmaBuffer.BlockSize = sizeof(uint16_t); // 每次读取的数据大小
    dmaBuffer.NbTransfers = num_of_elements;
    HAL_DMA_Start_IT(hi2c->hdmatx, (uint32_t)data_array, (uint32_t)&hi2c->DR, num_of_elements);

    while (!HAL_I2C_GetFlagStatus(hi2c, I2C_FLAG_RXNE)); // 等待接收完成

    // 如果需要，将接收到的数据保存到缓冲区
    for (uint16_t i = 0; i < num_of_elements; i++)
    {
        data_temp = (uint16_t)hi2c->Instance->DR; // 读取当前数据
        data_array[i] = data_temp;
        hi2c->Instance->DR = data_temp >> 8; // 发送下一个地址，继续读取
    }

    // 结束传输并关闭中断
    hi2c->Instance->CR1 &= ~I2C_CR1_START;
    HAL_DMA_Abort(&hi2c->hdmatx);
}