【STM32】G030单片机开启超过8个ADC通道的方法

如图所示通道数量已经超过8个，按照之前博客的办法已经行不通了

CubeMX配置STM32F103C8T6多路ADC配合DMA采集_stm32f103c8t6的adc采样率-CSDN博客

这里笔者开了10个channel，注意切换为不完全配置，否则的话最多只有8个rank

开DMA，选择循环模式

开ADC中断

时钟开内部时钟也可以

记得开一下串口和调试口，就不赘述了。至此CubeMX配置完毕

G030单片机的ADC需要校准一下，不然零点偏移比较大

未校准时读数80左右，校准后ADC值就比较准了，接地的情况下读数1~2

串口输出10个通道的ADC原始值如下所示

各个通道的值和cubemx里配置的从上到下顺序是一致的

但是如果开启内部温度采样这些通道后，顺序会有错开交换的情况

主要代码如下

cpp 复制代码

#include "main.h"
#include "adc.h"
#include "dma.h"
#include "usart.h"
#include "gpio.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "stdint.h"
#include "stdio.h"
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
#define CHANNEL_NUM 10
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
volatile uint16_t adcRaw[CHANNEL_NUM];
char str[100];
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{
  /* USER CODE BEGIN 1 */
  /* USER CODE END 1 */
  /* MCU Configuration--------------------------------------------------------*/
  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();
  /* USER CODE BEGIN Init */
  /* USER CODE END Init */
  /* Configure the system clock */
  SystemClock_Config();
  /* USER CODE BEGIN SysInit */
  /* USER CODE END SysInit */
  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_DMA_Init();
  MX_ADC1_Init();
  MX_USART2_UART_Init();
  /* USER CODE BEGIN 2 */
  HAL_ADCEx_Calibration_Start(&hadc1); //if no calibration, value would be inaccuracy when short to GND
  /* USER CODE END 2 */
  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
   HAL_ADC_Start_DMA(&hadc1, (uint32_t*)adcRaw, CHANNEL_NUM);
   sprintf(str, "CH0:%d\tCH1:%d\tCH2:%d\tCH3:%d\tCH4:%d\tCH5:%d\tCH6:%d\tCH7:%d\tCH8:%d\tCH9:%d\r\n",\
       adcRaw[0],  adcRaw[1], adcRaw[2],adcRaw[3],adcRaw[4],adcRaw[5],adcRaw[6],adcRaw[7],adcRaw[8],adcRaw[9]);
      HAL_UART_Transmit_IT(&huart2, str, sizeof(str));
      HAL_Delay(100);
    /* USER CODE END WHILE */
    /* USER CODE BEGIN 3 */
  }
  /* USER CODE END 3 */
}