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STM32L4A6 USART port selection for bootloader?

programmer131
Associate II

‎2023-05-31 7:02 AM - edited ‎2023-11-20 4:18 AM

Bootloader only responding on PC10 and PC11, but not on PA2,PA3,

how to select a particular UART port for bootloader?


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Tesla DeLorean
Guru

‎2023-05-31 7:46 AM

It is typically looking for signal transitions on multiple pins, first one to see traffic wins the race.

Make sure the other RX pins are not noisy, ie data from a GPS/GNSS receiver that squawks at startup.

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