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tompa · 2024-11-08

Hi, I am having a strange ADC problem on my STM32L431 device. I am sampling 6 channels without DMA using polling method with the following code: while (1) { /* USER CODE END WHILE */ /* USER CODE BEGIN 3 */ ADC_Select_CH0(); HAL...

tompa · 2024-11-01

Hi,I am confused with pin toggle timings, why I am getting non equal pulse widths like in the picture, I turn off all compiler optimizations and disable all of the interrupts, code is simple pin toggling. My controller is STM32L431 running on 80MHz.T...

tompa · 2024-10-22

Hi, I have three buttons - START, STOP and CH_SELECT which are serviced using EXTI interrupts. I have also a rotary encoder (A and B pins). Every button line is serviced on a separate IRQ line. Debouncing of the switch and rotary encoder pins is han...

tompa · 2024-11-10

Thank you very much for your reply!I finally made it with the code I posted in earlier reply.I use my own board and connecting pins to GND and VCC directly - but it works ok now except Scan Conversion Mode. I obviously don't know how to do it... More...

tompa · 2024-11-10

Thank you very much for your replay,Yes, I changed my code to this: void ADC_Select_Channel(uint32_t channel, uint16_t *result) { ADC_ChannelConfTypeDef sConfig = {0}; sConfig.Channel = channel; sConfig.Rank = ADC_REGULAR_RANK_1; sCo...

tompa · 2024-11-02

Hi PGump.1Thank you for your reply, unfortunatelly still uneven widths..

tompa · 2024-11-01

Uh, ok. How to put that code to RAM, is it complicated ?Is there maybe any other solution to try ?Thank you very much!

tompa · 2024-11-01

Uh, I don't know what is happening in my case... I am using STM32Cube...With 200 cycles I am getting 2.458us and sometimes 2.583us measured on Saleae Logic which is correct - I can see jitter on the scope...How does your C code look like ?

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ADC problems

Unexpected timing with nops

STM32L432 EXTI strange behaviour

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