A tft addin for pbp3

**richard** · - 26th June 2015, 13:36

The 2.2 " ili9341 (ili9340c how do tell) arrived today , after resoldering all the dry joints on the module it works .
I have separated things out like this main pbp pgm --- usercommand pbpmod file , an include bas file for either st7735 or ili9341 and a font bas file

in the pbp file
your hardware connections

Code:

;----GLOBAL----HW---------   
    SSP_IF VAR PIR3.7      ; must match your spi port 
   tft_dc_bit con  32     ;5      binary weighted pin values 
    tft_cs_bit con 16   ;4 
    tft_rst_bit con 128   ;7
    tft_port var lath ;          ; the output port for control signals

includes

Code:

    INCLUDE "glcd_chr.pbpmod"        ;glcdc
    include "tft-ILI9431.bas"      one or the other  not both
;    include "tft-ST7735.bas"      one or the other  not both

    INCLUDE "DT_INTS-18.bas"
    INCLUDE "ReEnterPBP-18.bas"
    INCLUDE "Elapsed_INT-18.bas"
    INCLUDE "font7x8.bas"

in the usercommand file glcd_chr
WIDTH con 320;160 X
HEIGHT con 240; 128 Y
set to appropriate values

and this bit needs to match your spi port too a definite conditional compile potential here

Code:

     
TFT_CMD:
spi_cbyte :
    tft_port =  tft_port & (~ tft_dc_bit )
TFT_DATA:    
spi_byte :
@       movff    INTCON , _p_int 
@       bcf     INTCON ,7 
    tft_port =  tft_port& (~ tft_cs_bit )
    SSP_IF = 0
    SSP2BUF = CMD 
    WHILE   SSP_IF =0 ' wait for SPI interupt flag
    wend
    tft_port = tft_port |   ( tft_dc_bit|  tft_cs_bit   )
    
@     movff  _p_int  , INTCON 
return

and off you go

I would have liked to have the hw connections and the height width in the relevant hw include file but that presented too many issues for me