I am using USART between the STM32L4 and the Raspberry Pi to enter in the bootloader mode.
It is working with the external reset (NRST pin) but I am trying now to enter in this mode with a software reset. I am using the command NVIC_SystemReset() and after the reset I don't get any answers from the STM32 when I send the start byte 0x7F.
Can we enter in boot mode with software reset and not external reset ?
Thanks for your help,