stm32g030 read analog PA0 and PA3 code with STM32CubeID

To read analog values from pins PA0 and PA3 on the STM32G030 microcontroller using STM32CubeIDE, you can follow these steps:

1. Open STM32CubeIDE and create a new project.

2. Select the appropriate board or microcontroller model (STM32G030 in this case).

3. Configure the necessary settings for your project, such as clock configuration and GPIO pins.

4. Enable the ADC peripheral:

   • Go to the "Pinout & Configuration" tab.
   • Select the desired ADC channel(s) for PA0 and PA3 by clicking on the respective pins.
   • Assign the pins to the ADC peripheral.
   • Click on the "ADC" peripheral in the "Middlewares" section.
   • Enable the ADC and configure its settings, such as resolution, sampling time, and conversion mode.

5. In your code, include the necessary header files:

#include "stm32g0xx_hal.h"

1. Initialize the ADC and GPIO:

ADC_HandleTypeDef hadc;
GPIO_InitTypeDef GPIO_InitStruct;

void SystemClock_Config(void);
void Error_Handler(void);

void MX_GPIO_Init(void)
{
  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOA_CLK_ENABLE();

  /*Configure GPIO pin : PA0 */
  GPIO_InitStruct.Pin = GPIO_PIN_0;
  GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  /*Configure GPIO pin : PA3 */
  GPIO_InitStruct.Pin = GPIO_PIN_3;
  GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}

void MX_ADC_Init(void)
{
  ADC_ChannelConfTypeDef sConfig;

  /* ADC Initialization */
  hadc.Instance = ADC1;
  hadc.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV1;
  hadc.Init.Resolution = ADC_RESOLUTION_12B;
  hadc.Init.DataAlign = ADC_DATAALIGN_RIGHT;
  hadc.Init.ScanConvMode = ADC_SCAN_DISABLE;
  hadc.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
  hadc.Init.LowPowerAutoWait = DISABLE;
  hadc.Init.LowPowerAutoPowerOff = DISABLE;
  hadc.Init.ContinuousConvMode = DISABLE;
  hadc.Init.DiscontinuousConvMode = DISABLE;
  hadc.Init.ExternalTrigConv = ADC_SOFTWARE_START;
  hadc.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
  hadc.Init.DMAContinuousRequests = DISABLE;
  hadc.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN;
  if (HAL_ADC_Init(&hadc) != HAL_OK)
  {
    Error_Handler();
  }

  /* Configure ADC channel */
  sConfig.Channel = ADC_CHANNEL_0; // PA0
  sConfig.Rank = 1;
  sConfig.SamplingTime = ADC_SAMPLETIME_13CYCLES_5;
  sConfig.SingleDiff = ADC_SINGLE_ENDED;
  sConfig.OffsetNumber = ADC_OFFSET_NONE;
  sConfig.Offset = 0;
  if (HAL_ADC_ConfigChannel(&hadc, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }

  sConfig.Channel = ADC_CHANNEL_3; // PA3

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

int main(void)
{
  /* MCU Configuration */
  HAL_Init();
  SystemClock_Config();

  /* Initialize GPIOs and ADC */
  MX_GPIO_Init();
  MX_ADC_Init();

  /* Infinite loop */
  while (1)
  {
    /* Start ADC conversion */
    if (HAL_ADC_Start(&hadc) != HAL_OK)
    {
      Error_Handler();
    }

    /* Wait for conversion to complete */
    if (HAL_ADC_PollForConversion(&hadc, HAL_MAX_DELAY) != HAL_OK)
    {
      Error_Handler();
    }

    /* Read the converted value */
    uint32_t adcValue = HAL_ADC_GetValue(&hadc);

    /* Do something with the ADC value */
    // ...

    /* Stop ADC conversion */
    if (HAL_ADC_Stop(&hadc) != HAL_OK)
    {
      Error_Handler();
    }
  }
}

Make sure to handle any errors appropriately in the Error_Handler() function.

1. Build and flash your project to the STM32G030 microcontroller.

This code initializes the ADC peripheral and sets up PA0 and PA3 as analog inputs. Inside the infinite loop, it starts an ADC conversion, waits for it to complete, retrieves the converted value, and then stops the ADC conversion. You can perform any necessary processing or actions with the ADC value as required.

Remember to refer to the STM32G0 HAL reference manual and the STM32CubeG0 firmware package documentation for more details on the ADC and GPIO APIs and configurations specific to your needs.

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