Posted on April 30, 2018 at 18:16 hi, I have a problem using an ADC of a STM32L4
In my project I have to sample 5 analogue channels with an ADC. I've configured everything with STM32CubeMX and want to use it in polling mode.
I have seen examples where this code is:
HAL_ADC_Start(&hadc);
if (HAL_ADC_PollForConversion(&hadc, HAL_MAX_DELAY) == HAL_OK) {
ADC_ch0_value = HAL_ADC_GetValue(&hadc);
HAL_ADC_PollForConversion(&hadc, HAL_MAX_DELAY);
ADC_ch1_value = HAL_ADC_GetValue(&hadc);
HAL_ADC_PollForConversion(&hadc, HAL_MAX_DELAY);
ADC_ch2_value = HAL_ADC_GetValue(&hadc);
...
...
}
HAL_ADC_Stop(&hadc);
in which the channels are converted sequentially, what I would like to do instead is to convert only the selected channel, for example:
HAL_ADC_Start(&hadc);
---> SELECT ADC CHANNEL 3 <---
if (HAL_ADC_PollForConversion(&hadc, HAL_MAX_DELAY) == HAL_OK) {
ADC_ch3_value = HAL_ADC_GetValue(&hadc);
}
HAL_ADC_Stop(&hadc);
// other code
// other function
HAL_ADC_Start(&hadc);
---> SELECT ADC CHANNEL 1 <---
if (HAL_ADC_PollForConversion(&hadc, HAL_MAX_DELAY) == HAL_OK) {
ADC_ch1_value = HAL_ADC_GetValue(&hadc);
}
HAL_ADC_Stop(&hadc);
what I do not know how to do is the code for:
---> SELECT ADC CHANNEL n <---
How can I do? can someone help me?
