About Kurngop32

Kurngop32 · 2024-05-09

I have a strange problem. I have a global uint32_t variable that counts up in the main loop and every 100 ms it gets reset in a timer-ISR. This works, but sometimes it does not.Here is the value of the variable MainCounter read out by the debugger:Th...

Kurngop32 · 2024-01-29

tl;dr: accessing external memory over debugger results in additional unwanted write accesses to adjacent memory locationsI have an FPGA that is accessed via FMC over a 16-bit async connection (16-bit data +15-bit address), sort of like an external SR...

Kurngop32 · 2023-12-07

Hello,I am trying to get the FMC to work in 16-bit synchronous mode but I only get an output with 4 clocks (64-bit) instead.In other threads [1], [2] I found that I should either switch the address from 0x60000000 to 0xC0000000 or enable the MPU, but...

Kurngop32 · 2024-05-10

This has nothing to do with it being a dual core CPU. This problem exists one single core CPUs as well.btw, I solved it now with a reset flag. This was the fastest solution.if (ResetMainCounterFlag) { ResetMainCounterFlag = false; MainCounter = 0; ...

Kurngop32 · 2024-05-10

interesting, but it takes about twices as long (130ns compared to 60ns, with -O3) as:__disable_irq(); MainCounter++; __enable_irq();

Kurngop32 · 2024-05-09

This was my first thought, but my second thought was: this is a problem of the (8-bit microcontroller) past.So if this is an actual problem, I’m a bit disappointed right now and it looks like I have to rethink a lot of code.

Kurngop32 · 2024-05-09

void TIM1_UP_IRQHandler(void) { LL_GPIO_SetOutputPin(dbg7b_GPIO_Port, dbg7b_Pin); LL_TIM_ClearFlag_UPDATE(TIM1); MainCounter = 0; __DSB(); LL_GPIO_ResetOutputPin(dbg7b_GPIO_Port, dbg7b_Pin); }like so? does not help

Kurngop32 · 2024-05-09

Result with IOs, because debugger might (and does) interfere.So the ISR is called everytime, but MainCounter is not reset everytime. The behaviour is different with or without debugger connected, and also changes with different optimizations levels.I...

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STM32H745 - resetting of a variable in ISR does not work occasionally

STM32H745, faultily write access to external memory over debugger

STM32H745 FMC PSRAM 16-bit always sends 64-bit

Re: STM32H745 - resetting of a variable in ISR does not work occasionally

Re: STM32H745 - resetting of a variable in ISR does not work occasionally

Re: STM32H745 - resetting of a variable in ISR does not work occasionally

Re: STM32H745 - resetting of a variable in ISR does not work occasionally

Re: STM32H745 - resetting of a variable in ISR does not work occasionally