Freematics Forum

you need to change the config file:

config.h

LCD_R61581 lcd; /* 3.5" CTE35IPS/R61581 based LCD */
//LCD_SSD1289 lcd; /* 3.2" SSD12389 based LCD */
//LCD_ILI9325D lcd; /* 2.8" ILI9325 based LCD */
//LCD_ILI9341 lcd; /* 2.4" ILI9341 based SPI LCD */
//LCD_Null lcd;

so that you have the correct LCD ...