About user 143

user 143 · 2022-02-02

Hello,According to the Reference Manual of the STM32L431 controller, the ADSTP in the ADC_CR register must be set to 1 to stop the ADC. Additional condition is that both ADSTART=1 and ADDIS=0 must be. Once the ADC is stopped, the ADSTP bit is cleared...

user 143 · 2022-01-18

Hello,I've created a custom PCB with a STM32F207 controller on it. With this board I want to address different targets using SWD. My targets are a STM32F407 and a STM32L431 controller. I implemented a custom SWD interface with Timer and DMA on my F20...

user 143 · 2021-06-24

Hi guys,I want to use the ADC with DMA and external trigger. Sounds easy, and its working, but not to 100%. The ADC should measure 2 channels, Channel 3 and Vrefint. Every measurement should be repeated 50 times, that I get 100 values. The external t...

user 143 · 2020-07-13

Hey guys, I'm a bit confused in using the ADC in differential mode. I've got a shunt resistor and want to measure the voltage as exact as possible. One side of the shunt is connected to GND, but with higher currents, this GND is not anymore GND (it's...

user 143 · 2020-06-08

Hi guys, I want to use 10 external interrupts. 9 of them are working fine, but one of it makes trouble. I'm using CubeMX and configured the 10 pins as external interupt with falling edge detection and enabled the interrupts. The pins are: PB6, PB7, P...

user 143 · 2022-02-03

So, I already found the mistake. I thought, the ADSTART bit was set, but it was not set. So now I check first if the bit is set, and stop then when neccesary.

user 143 · 2022-01-18

Kind of, yes. I've found my mistake. The PG bit in the FLASH_CR register was set. For the F407 this was not a problem, but the L431 had a problem with it. Wenn the PG bit is cleared, mass erase works as expected. Thank you!

user 143 · 2021-06-25

Yes, I found a way, now it works.I changed my ADC configuration: HAL_StatusTypeDef adc_custom_init(void) { /* configure ADC1 */ hadc1.Instance = ADC1; hadc1.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV2; hadc1.Init.Resolution = ADC_RESOLUTION_12B;...

user 143 · 2021-06-24

The function returns with HAL_BUSY, because the ADC_CR_ADSTART bit is set.When I call first HAL_ADC_Stop_DMA() and after that again HAL_ADC_Start_DMA() it work fine. But it takes so long, that can't be the solution.

user 143 · 2020-07-14

"Check the acceptable common mode voltage range and differential max amplitude in the electrical part of the datasheet."The common mode voltage should be between (Vref+ - Vref-)/2 - 0,18 and (Vref+ - Vref-)/2 + 0,18. So in my case between 0,72V and 1...

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Re: STML431 ADC differential mode