STM32G431 Flash from UART Problem
Hello , I'm using Nucleo-G431RB board , and I am trying to flash the MCU via UART1 using PA9 and PA10 pins but I can't make it work ..
I get an error like "Error: Activating device: KO. Please, verify the boot mode configuration and check the serial port configuration. Reset your device then try again... "
I'm using STM32Cube Programmer , also I followed the instructions in AN2606 , the application note states that it should follow pattern 15 , as far as I can view the option bytes using the onboard ST-Link , nSWBOOT0 comes unchecked so software decides if it should run starting from bootloader address .. My settings for UART are 9600 Baudrate , Even parity . NBOOT0 and NBOOT1 comes checked so it seems it is not applicable for any pattern to jump bootloader mode , So I tried setting NSWBOOT0 so it matches the pattern stated "BOOT_LOCK(bit)=0, Boot0(pin) = 1, nBoot1(bit) = 1 and nBoot0_SW(bit) = 1" , I manually tied BOOT0 to 3.3V and when I reset the MCU I can verify that it starts at bootloader mode , what makes me think like that is the observation on behaviour of some pins using scope , It is not the code running the user flash .. Also I can say that my UART com bridge is sending 0x7F but there is no response coming out of the MCU at all .. Where do I do the mistake .. any help would be appreciated .