About SKarl.3

SKarl.3 · 2024-07-30

I have an STM32L452 part in a system with multiple DMA and interrupt operations going on.The main problem I'm having right now is _sometimes_ I don't get the interrupt for DMA RX on UART4. Sometimes I do, sometimes I don't.I have been adjusting the ...

SKarl.3 · 2024-07-18

I'm having a strange issue here. I have a custom board design using the STM32L452RETx.I have 17 boards in front of me, and most of them work as expected: bootloader runs at power up, and when it times-out, it jumps to the main app ( at 0x08008000). P...

SKarl.3 · 2023-04-14

I have a design that uses and STM32L4 series MCU. The device will be hard to physically access, but has a serial connection to the 'outside' world on UART 4. The board also has a 4 Mbit flash connected to the MCU via (bit-banged) SPI.When I need to u...

SKarl.3 · 2024-07-30

Interesting... just as an experiment i disabled the other interrupts and DMAs and the issue is still happening. Maybe its not interrupt related? I've implemented the HAL_UART_ErrorCallback(), and HAL_DMA_ErrorCallback() functions to check for DMA and...

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DMA RX interrupt sometimes not firing?

Bootloader jumps to some crazy address, but only on some PCBs

STM32L4: How to program MCU on-board flash from binary stored in external FLASH?

Re: DMA RX interrupt sometimes not firing?