Works fine on MacOS (M1 Mac)

[n8henrie]

Hello -- thanks for a great project!

I just wanted to note for other readers searching the issues that this worked fine on my M1 Mac running MacOS 12.2.1 just by downloading gcc-arm-none-eabi and adding it to my $PATH.

If you're interested in incorporating this into the README, I'd be more than happy to refactor this into a PR! If not please close the issue, no worries.

My process:

1. On STM32: move jumper closer to the edge from 0->1
2. Put FTDI at 3.3v
3. Connect the (unplugged) FTDI to the STM32 (remember: Tx goes to Ten)

FTDI	STM32
TX	A10
RX	A9
3V	3V
GND	GND

export SERIAL=/dev/tty.usbserial-00000000 # or whatever the device is in your case

wget 'https://developer.arm.com/-/media/Files/downloads/gnu-rm/10.3-2021.10/gcc-arm-none-eabi-10.3-2021.10-mac.tar.bz2'
tar -xjf gcc-arm-none-eabi-10.3-2021.10-mac.tar.bz2
PATH+=:"$(pwd)"/gcc-arm-none-eabi-10.3-2021.10/bin
export PATH

git submodule add https://github.com/dword1511/stm32-vserprog.git`
git submodule update --init --recursive`
cd stm32-vserprog/
make BOARD=stm32-vserprog-v2
make BOARD=stm32-vserprog-v2 flash-uart

$ flashrom -p serprog:dev="${SERIAL}"
... works fine

I was adding this to an existing git project, so instead of the submodule business above, most users will probably want to use git clone --recurse-submodules as per the README.