SD card Read and write/game power-off protection

[wjb321]

lvgl supports sd card read and write, there are lists of function can be used. but before that there should be some drivers preparation.

• [x] basic working principles and the gpio configuration: ss, miso, mosi, clk configuration
• [x] lv_fatfs.c/h configuration, which allow some file read and write, some basic function like : readfilelinline, read/writeBInFrom/toSd function.
• [x] configure wifi name and password into txt file and call the function: readfileinline can realize wifi connection and then read some information on line.

[wjb321]

sd card now can be read and write. but gif still not working.

• [ ] can execute one thing: Write the game state into SD card regularly for power off data protection

[wjb321]

• [ ] start reading png or gif from sd card