userspace SSD1283A sample code for raspberry pi
https://github.com/ZinggJM/SSD1283A
https://www.raspberrypi.org/documentation/hardware/raspberrypi/spi/README.md#troubleshooting
https://www.raspberrypi.org/documentation/hardware/raspberrypi/gpio/README.md
the 130*130 SPI lcd module http://www.lcdwiki.com/1.6inch_SPI_Module_SSD1283A_SKU:MSP1601
cs,cd,reset,led -> 8, 27, 22, 17 spi0
see makefile
rm *.o && make && ./exec