给出读取ADC0832双通道电压的STM32代码

以下是基于STM32 HAL库的ADC0832双通道电压读取代码示例：

#include "main.h"
#include "stdio.h"

#define ADC_CHANNEL_0       0
#define ADC_CHANNEL_1       1
#define ADC_VREF            3300.0f // ADC参考电压为3.3V
#define ADC_RESOLUTION      4096.0f // ADC分辨率为12位，共2^12=4096个等级

ADC_HandleTypeDef hadc;

void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_ADC_Init(void);

float getVoltage(uint16_t adcValue);

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

  while (1)
  {
    uint16_t adcValue0, adcValue1;
    float voltage0, voltage1;
    char str[100];

    // 读取ADC通道0的电压
    HAL_ADC_Start(&hadc);
    if (HAL_ADC_PollForConversion(&hadc, 100) == HAL_OK)
    {
      adcValue0 = HAL_ADC_GetValue(&hadc);
      voltage0 = getVoltage(adcValue0);
      sprintf(str, "ADC Channel 0 Voltage: %.2f mV\r\n", voltage0);
      HAL_UART_Transmit(&huart2, (uint8_t*)str, strlen(str), HAL_MAX_DELAY);
    }

    // 读取ADC通道1的电压
    HAL_ADC_Start(&hadc);
    if (HAL_ADC_PollForConversion(&hadc, 100) == HAL_OK)
    {
      adcValue1 = HAL_ADC_GetValue(&hadc);
      voltage1 = getVoltage(adcValue1);
      sprintf(str, "ADC Channel 1 Voltage: %.2f mV\r\n", voltage1);
      HAL_UART_Transmit(&huart2, (uint8_t*)str, strlen(str), HAL_MAX_DELAY);
    }

    HAL_Delay(1000);
  }
}

float getVoltage(uint16_t adcValue)
{
  return adcValue * ADC_VREF / ADC_RESOLUTION;
}

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

  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
  /** Initializes the CPU, AHB and APB buses clocks
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
  {
    Error_Handler();
  }
}

static void MX_ADC_Init(void)
{
  ADC_ChannelConfTypeDef sConfig = {0};

  /** Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion)
  */
  hadc.Instance = ADC1;
  hadc.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV4;
  hadc.Init.Resolution = ADC_RESOLUTION_12B;
  hadc.Init.ScanConvMode = DISABLE;
  hadc.Init.ContinuousConvMode = DISABLE;
  hadc.Init.DiscontinuousConvMode = DISABLE;
  hadc.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
  hadc.Init.ExternalTrigConv = ADC_SOFTWARE_START;
  hadc.Init.DataAlign = ADC_DATAALIGN_RIGHT;
  hadc.Init.NbrOfConversion = 1;
  hadc.Init.DMAContinuousRequests = DISABLE;
  hadc.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
  if (HAL_ADC_Init(&hadc) != HAL_OK)
  {
    Error_Handler();
  }
  /** Configure for the selected ADC regular channel its corresponding rank in the sequencer and its sample time.
  */
  sConfig.Channel = ADC_CHANNEL_0;
  sConfig.Rank = 1;
  sConfig.SamplingTime = ADC_SAMPLETIME_3CYCLES;
  if (HAL_ADC_ConfigChannel(&hadc, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }

  sConfig.Channel = ADC_CHANNEL_1;
  sConfig.Rank = 2;
  sConfig.SamplingTime = ADC_SAMPLETIME_3CYCLES;
  if (HAL_ADC_ConfigChannel(&hadc, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }
}

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

  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOA_CLK_ENABLE();

  /*Configure GPIO pin : LED_Pin */
  GPIO_InitStruct.Pin = GPIO_PIN_5;
  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);
}

在这个示例代码中，我们使用了ADC1，并且将其通道0和通道1分别连接到了ADC0832的AIN1和AIN2引脚。我们采用了轮询方式读取ADC值，并且使用了一个自定义的函数getVoltage来将ADC值转换为电压值。注意，在读取通道1的电压时，我们必须要重新启动ADC转换，因为我们在配置ADC时将其设置为单次转换模式。