I have reviewed the Keil project in the tftlcd.zip file.
You can start with any of the examples in Sample code package (SC code) for the K20 initialization. Then, you need to rewrite/adapt the SPI.c and ADS7843.c functions code for K20 peripherals (SPI).
my board is FRDM-K20D50M .and i am going to config graphic LCD by this microcontroller .but i have not the header file of this LCD for FRDM . can u help me? my TFT lcd is CN7