Hi. When I try to compile a code from github for cc3d board STM32F4GT6 I see an error that says "Invalid chipset specified. Update platform.h" but I have specify it correctly. What should I do?
Evidence suggests otherwise, you're doing something wrong.
Have you read all the build instructions thoroughly? I'm sure the devs have explained the process a million times, review available BetaFlight/CC3D FAQ and forums dealing with this kind of failure to launch issue repetitively.
Walk the code to understand the relationship between the settings and the errors.
How does this relate to Keil?