About Ppeyr.1

Ppeyr.1 · 2022-08-04

Hi,I use RTC on a STM32L073. Every 12hours, I receive a date and time to set to the RTC. (Sometime, like 1% of the time) After writen the new RTC value, the RTC doesn't overflow after 23h59min59sec and keep counting without incrementing day. I can ha...

Ppeyr.1 · 2022-03-08

I'm working on a STM32L072, and I want to implement an update over the air. I saw there is an errata about the dual bank boot, and ST has made a workaround on it, and it uses the EEPROM.Code from the errata sheet:void SystemInit(void) { /* ...

Ppeyr.1 · 2022-02-18

I want to read the Vdd (link to VDDA) of my board with the ADC in a STM32L072. I try read it through a divider bridge or through VrefInt, and both give me a value far below the voltmeter value.here is my config: hadc.Instance = ADC1; hadc.Init.Ov...

Ppeyr.1 · 2021-08-04

I'm working on a STM32L072, and I tried to configure the PVD to rising an IT when the supply voltage is below 2.7V.It appears that the IT is always rise even the voltage is always above 3V. __HAL_RCC_PWR_CLK_ENABLE(); __HAL_PWR_VOLTAGESCALING_...

Ppeyr.1 · 2022-08-05

The handler is initialized with 24hours mode. I never erase it, It's a global var and I never go to standby mode, so the handler doesn't change during the run. handler.Instance = RTC; handler.Init.HourFormat = RTC_HOURFORMAT_24; handler.In...

Ppeyr.1 · 2022-08-04

I tried both, BCD or binary, both has the same issue

Ppeyr.1 · 2022-02-21

Thanks for you answers, this helps a lot. I will check the impedance, and find a solution. I will come back if it doesn't work.

Ppeyr.1 · 2022-02-21

VreftInt measure was roughly OK before the calibration, I'm talking about channel1. I have ~1.2V measured on the multimeter.And I have: 1007 * 3.3 / 4096 = 0.81V with a calibration1079 * 3.3 / 4096 = 087V without a calibration

Ppeyr.1 · 2022-02-21

I tried to calibrate the ADC, but it's worse.I add this code right after the init: if (HAL_OK == HAL_ADCEx_Calibration_Start(&hadc, ADC_SINGLE_ENDED)) { uint32_t calibFactor = HAL_ADCEx_Calibration_GetValue(&hadc, ADC_SINGLE_ENDED); ...

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RTC hours keep counting after 24 hours

Questions about ST's BFB workaround on STM32L072

offset on the ADC

PVD IT always rising

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