About YvanR

YvanR · 2023-06-23

"Board A" is a previous revision that used STM32F103C8T6 to communicate with a device over CAN. It works great."Board B" is a new revision of the same board, but I migrated to STM32L431RCT6 because I needed more IO and it was readily available. Long ...

YvanR · 2023-05-08

In a current PCB design, SWD debugging is very erratic. Stepping through the code line-by-line works fine, but executing multiple lines will sometimes result in an apparent crash with a call stack like0x08061300xfffffff9which doesn't make any sense f...

YvanR · 2023-05-01

I have a board that is running well. There are about 50+ PCBs in production operating fine. The firmware is pretty complex, but the hardware relatively simple, just some SPI devices and some PWM outputs.I revved the board, and the new board doesn't w...

YvanR · 2023-06-23

Thanks @Tesla DeLorean I checked and confirmed your suggestions.I was able to resolve the issue, though I don't 100% understand why.The only hardware difference between the original board and the current one is the model of the transceiver. During ma...

YvanR · 2023-05-18

I spent a couple of hours digging into this, but the types and number of faults reported just didn't make sense. Through trial and error I determined that my original hunch was correct; the debugger simply was not acting reliably. When the code execu...

YvanR · 2023-05-09

Thanks for the guidance, Bob.STM32F411CEU6FreeRTOSThe Fault Analyzer is reporting a (FORCED) and (IBUSERR) with PC/PSP at 0x0.Unfortunately the fault is non-deterministic, which is the debugging challenge. I can step up until osKernelStart(); but the...

YvanR · 2023-05-02

I'm back. As I suspected the issue was that I left BOOT0 floating. After wiring it to ground, the blinky sanity check operates normally.With BOOT0 left to float, execution does predictably commence from flash at 0x08000000; but further execution is ...

YvanR · 2023-05-02

Thanks for the suggestion.I checked the PLL configuration for sanity. I also removed PLL from the equation and ran HSI directly at 16MHz -- same issue.So I went completely back to backs and created an empty project. The only thing I configured was a ...

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CAN not working on STM32L431RCT6

Hard faults, but not really == impossible to debug

RCC configuration results in HardFault (STM32F411CEU6).

Re: CAN not working on STM32L431RCT6

Re: Hard faults, but not really == impossible to debug

Re: Hard faults, but not really == impossible to debug

Re: RCC configuration results in HardFault (STM32F411CEU6).

Re: RCC configuration results in HardFault (STM32F411CEU6).