Use PlatformIO
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I read that you are looking at replacing Keil IDE with an opensource alternative.
I believe SDCC is supported with platformIO.
Also it is easy for new developers to get hacking away and contributing to the project without a huge learning curve from a custom IDE like STM/Microchip/others are known for.
I'd say i am 30-35% there, trying to compile this with sdcc(4.2).
I have added a basic Makefile and I am able to compile the sources - I think.
I am currently trying to get the compiled sources to link and create a binary. I haven't done much baremetal programming in C, so I may need to read up on more things to get the linking working, Until then, feel free to review/help me out with the steps.
https://github.com/saidinesh5/hdzero-vtx/tree/sdcc
i created a basic platfomio project here:
https://github.com/bkleiner/hdzero-vtx/tree/platformio
the pio part it does what it should - however there are still a bunch of issues with using sdcc to compile a flash-able binary
I have a compiling SDCC version of this software and I'm also using cmake. All that's missing is the conversion from A51 pseudo code to bootloader asm. Furthermore, it allows for the co-existence of compiling with Keil. That way Carl and team can use their tools to debug issues when they arise.... I don't think SDCC has such a comprehensive debug solution.... I could be wrong...
retaining compatibility with keil is an interesting angle, however i suspect to take advantage of uVisions debug capabilities they would want to maintain their project files either way so i don't know if cmake actually provides any benefit there.
you might wanna join us on the hdzero discord https://discord.com/invite/kGsnEDMb2V?fbclid=IwAR2eb9m5YUIOLAl5Nq5bY_tuq94awmhvpPFlBz0jKxbktXHVmIOgkSqY-Gw ("open-source" channel)
there are a couple of people there figuring stuff out together.
I use cmake because that is what I'm accustomed too. I am able to build this source both Linux and macOS.... having windows support would probably be an easy port as well.
@SumolX Once building works on Linux you can always use the WSL to also compile on Windows. But having full win support would be the cherry on top.
PIO comes with seamless cross platform support out of the box ;)
I will have to check it out. As long as the code compiles and produces a valid binary.... cmake can always be replaced. The only real dependency is SDCC.