Hello after a long time,
I have been working about my previous post in my spare time and i have decided to work on new board to expand my playground.
Now i am working on a sensor board that includes inemo imu module, gps receiver, pressure, humudity and temperature sensors. as mcu i decided on stm32f429 which is available on stm32f429-discovery board of st micro. you can access all schematics and pcb files from below link if you are interested.
also i will share low level drivers and bsp for the board as soon as pcb design finishes on github.