I have a Finger pulse oximeter and inside I found a STM32F030C8T6 MCU. I'm looking to replace the firmware with one of my own.
Is it possible to dump the current firmware and restore it, perhaps even to another dev board running the exact same cpu?
Exposed pins: TX, RX, GND, VBAT, 3.3V
I have a ST-Link V2 clone and am familiar with uploading new firmware, just not downloading existing.
To upload new firmware, I run:
st-util arm-none-eabi-gdb new_firmware.elf (gdb) target extended localhost:4242 (gdb) load
Not sure what the process is to download existing though. Little help?
Photos of the board: