ADC on MCU got damage

Nikola Krneta

I'm not expert on using the HAL library for STM. I have used STM32F429, but by writing code from scratch, even the startup script in assembly. From what I have read is that you didn't properly configure the ADC. There are several modes of operation, including continuous and polled. Continuous operation samples the analog pin as soon as the conversion is finished. Polled requires you to start the sampling and conversion sequence manually. In both cases, if I remember correctly, you must clear the result buffer before it overflows. Also, it is necessary to reset some bits in the ADC control registers. I would look it up in the datasheet, but that only describes direct register access. Obviously, since you're using the HAL library, I would suggest you read the documentation on the usage of the ADC.

Chatchai Buekban

My issue has solved add HAL_ADC_Stop(&hadc1); but still confused why some parts can work some parts not work. *** So, the PCBA has no problem **** :) HAL_ADC_Start(&hadc1); if (HAL_ADC_PollForConversion(&hadc1, 1000) == HAL_OK) { result_adc = (uint16_t) HAL_ADC_GetValue(&hadc1); HAL_ADC_Stop(&hadc1); // add this line } Thanks.

Alex C

Yeah, this could be an issue with a static or ESD sensitive device, it is very possible for the MCU to have possibly gotten broken in some way. It is also possible for a part to simply come from a bad batch or have some other manufacturing error on the Chip vendor's or someone else's part.

Bobby Iridium

I haven't had that issue, but it sounds like you have done a good job troubleshooting since you have isolated the problem by swapping the MCU.