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ADC

It is recommended to enable DMA transfer in STM32CubeMX, activate continuous conversion, and configure the DMA channel in circular mode.

Example​

The code generator will read the enabled channels for each ADC peripheral and their order in continuous conversion mode to generate the following code:

// First, generate the sequence of ADC channels
std::array<uint32_t, 1> adcX_channels = {ADC_CHANNEL_1, ADC_CHANNEL_2, ...};

// Then, create the ADC object
STM32ADC adcX(&hadcX, adcX_buf, adcX_channels, 3.3);

// Finally, create individual ADC channel objects
auto adcX_adc_channel_1 = adc3.GetChannel(0);
auto adcX_adc_channel_2 = adc3.GetChannel(1);
...

Note: STM32ADC is not derived from the ADC base class. Instead, it contains multiple ADC channel objects that are derived from the base ADC class.

Configuration File​

After the code is generated, an ADC configuration section will appear in the User/libxr_config.yaml file, formatted as follows:

ADC:
  adcX:
    buffer_size: 128
    vref: 3.3
  • buffer_size: The size of the ADC buffer.
  • vref: The reference voltage for the ADC, in volts.

You can modify this file directly. To apply the updated configuration, run either of the following commands to regenerate the code:
xr_cubemx_cfg -d .
or
xr_gen_code_stm32 -i ./.config.yaml -o ./User/app_main.cpp