I'm writing code for STM32F042. If I'm running on the TSSOP20 package, I need to remap PA11 and PA12 to PA9 and PA10. For all other packages, I need to leave them alone.I can have a compile-time switch and generate different binaries for different pa...

I'm trying to set up a counter to capture the period of an input signal. I'm getting lost in the different CCMR bits. If it possible to do the following:wait for a raising edge on an input.on the raising edge, start counteron the next raising edgerec...

I'm developing an application for the F042 series chips. I'm using Nucleo-F042K6 for development.I want to allow users to flush firmware using DFU mode. I am unclear on how to force the device into the DFU bootloader. Some material I read suggests th...

I want to run the NUCLEO-F042K6 on external 3V3 supply. I understand that in this case ST-LINK remains down, and I cannot use its crystal for clocking. I want to use a crystal to clock the MCU.Looking at the schematic[1], I wonder if I can use the sa...