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How to read from multiple channels of the ADC on an STM32F407?
As suggested by @Aymen Lachkhem you need to configure rank for each channel, this will add desired channels to sequencer for conversion otherwise that particular channel will not be scanned. Suggestion: You can start ADC conversion using DMA, provide RAM location and number of data to be transferred.
When does the ADC start in single conversion mode?
In Single Conversion mode, the ADC does one conversion. This mode is started either by setting the ADON bit in the ADC_CR2 register (for a regular channel only) or by an external trigger (for a regular or injected channel), while the CONT bit is 0. Once the conversion of the selected channel is complete: If a regular channel was converted:
When to use dual Fast interleaved ADC mode?
The dual fast interleaved ADC mode is intended for the conversion of one channel. ADC1 and ADC2 convert the selected channel alternately with a period of 7 ADC clock cycles. This means that the channel is converted every 7 clock cycles. Each ADC converts the channel every 14 ADC clock cycles. With a 14 MHz ADC clock, it is thus possible to reach
How often does ADC start in STM32 cubemx?
This way, the ADC will be started every 0.1 seconds. To do this using DMA, the DMA is configured as follows. Data Width is chosen Half Word (16-bits), since the ADC is configured at 12-bit. Mode Circular is enabled because otherwise only one measurement will be done.
Where is the calibration code stored in STM32 ADC?
Calibration is started by setting the CAL bit in the ADC_CR2 register. Once calibration is over, the CAL bit is reset by hardware and normal conversion can be performed. It is recommended to calibrate the ADC once at power on. The calibration codes are stored in the ADC_DR as soon as the calibration phase ends.
Why is scan mode not used in interrupt-driven ADC?
This timer needs to be aware of its number of overflows (using an interrupt) so it can disable itself after all the channels in the sequence are sampled and converted. Another timer (Master) controls the timing between the scanning sequences, and it activates the slave timer (and probably the first scan in the sequence).
Is there a HAL library for ADC conversion?
HAL library provides APIs to start ADC conversion using DMA and a weak implementation of callback. Thanks for contributing an answer to Electrical Engineering Stack Exchange! Please be sure to answer the question.
How to start a DMA transfer in STM32?
Note the Mode parameter. If you set it to DMA_NORMAL, you would need to start another DMA transfer by calling HAL_ADC_Start_DMA () each time a transfer is completed. And if you don’t do it fast enough, you will get an ADC overrun error and lose some ADC samples.
How to disable ADC in STM32 microcontroller?
It turned out that #define ADC_EOC_SEQ_CONV ( (uint32_t)0x00000000) value is equal to DISABLE. So actually the EOCSelection should be configured as: to be able to poll the ADC multiple times. Then you can read the ADC continously without stopping and starting the ADC: This way it worked fine for me.