STM32F407VG Discovery

Notes about using Frosted on the STM32F407VG-Discovery:

• Although the board does have 192KB SRAM, it is split in two regions:
  • a 128KB region at 0x20000000
  • a 64KB region at 0x10000000

This means the kernel RAM size is limited to 128KB due to the kernel requiring its RAM to be contiguous. In turn, this has as consequence that with Frosted, it is impossible to enable all the subsytems. Especially enabling TCP/IP will use a lot of additional RAM. For this reason the f407 defconfig has TCP/IP disabled, as well as SDIO and FAT FS. Starting from the defconfig you should however still be able to enable networking and usb ethernet and have things working.