Hi,
As per title I am unable to enter the System Memory bootloader when using the STM32C071FBP6N. Any assistance would be greatly appreciated.
Following the notes in AN2606, i have configured pattern 11 (line 2) using the CubeProgrammer but when completing the reset with the Boot0 pin high it does not enter the bootloader mode and can tell this because my user application runs immediately after the reset occurs.
I have been able to jump to the bootloader through my own firmware where I initialize the HAL and GPIOs and then check the status of the boot0 or other pins then manually change the PC and SP but wish to avoid this method as this should not be necessary.
-------
I have followed the steps below:
1. Using a ST-Link I have successfully changed the option bits nBOOT_SEL=0; nBOOT1=1; nBOOT1=1; BOOT_LOCK=0 using the CubeProgrammer and have also flashed a basic UART output program which outputs to USART2 the whether the PA14/BOOT0/PA15 is high or low.
2. disconnect the ST-Link (since it interferes with the BOOT0 pin of this chip)
3. Set the BOOT0 pin high and then set nRST low then high
At this point i still see my application code running and output to the UART saying the PA14/BOOT0/PA15 is high
note: I am using minicom to read the UART and I have 'read' the option bit configurations to ensure they are properly saved on the device; Hardware-wise I am using a 10k Ohm pulldown resistor for the BOOT0 pin
