AnsweredAssumed Answered

Systick overspeed?

Question asked by Ken CK on Feb 5, 2018
Latest reply on Feb 7, 2018 by Ken CK

I'm using an STM32F429ZI Nucleo-144 board with CubeMX, enabled FreeRTOS, LWIP, USARTs, IWDG, RTC. The HSE clock source is the on-panel ST-Link 8MHz, the LSE clock source is the on-board 32.768 kHz crystal oscillator.

Since I have recently upgraded to latest cube package version (upgraded FreeRTOS, HAL, CMSIS, Cube libs) I realized that the time base of the panel just got speedy. If I use it to calculate time (and not the RTC), I experience about a 20% overspeed.

I tried using bothe the Systick and Timer1 to provide the timebase source, with the same outcome.

 

Additional information is that I power the board from external 12V.

 

Any ideas why this symptoms may come up?

 

Here are the clock configs from Cube:

Outcomes