Start FLASH address: 0x80005000
Tested on an unknbown Chinees board.
The board differ from original AT-START-F425 by EXT XTAL frequency(used 12Mhz XTAL) and LEDx GPIOs.
To use with original AT-START-F425 board use the definition AT_START_F425_V1 instead AT_TAOBAO_F425.
Note: to bild app used cmake. GNU toolchain must be installed, path to GNU binaries must be added to PATH.