About TNish.2

TNish.2 · 2021-10-30

I want to run the ADC using DMA and Dual mode.The sampling rate was set to 80kS / s using TIM3. The board I am using is Nucleo 64 STM32 F446.In order to confirm whether the ADC is really running at 80kS / s, I described "HAL_GPIO_TogglePin" in "DMA2_...

TNish.2 · 2021-10-30

Thank you for taking the time.When I run the program without setting a breakpoint, the pin output toggles only once and there is no change thereafter.I don't know why it works on 1125 but not on 11252.I have set the sampling time to 56 cycles, is thi...

TNish.2 · 2021-10-30

I'm sorry.Fixed 11252 to 1125.As a result, the DAM interrupt was generated only once, and then no interrupt was generated. (printf has been deleted.)This phenomenon was confirmed by setting a breakpoint in HAL_GPIO_TogglePin (GPIOA, GPIO_PIN_5) of th...

TNish.2 · 2021-10-30

Thank you for your answerprintf is implemented as follows.Also, the buffer setting was missing, so I added it.Also, when the printf described in stm32f4xx_it.c was deleted, the pulse width became 122us (8.2kHz).Sorry to trouble you, but thank you for...

TNish.2 · 2021-10-30

I had the same symptoms.When I used TIM3 as an ADC trigger and enabled TIM3 global interrupts, I had the same symptoms as you.At this time, disabling TIM3's global interrupt solved the problem.

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ADC sampling rate is different from the set value

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