doc/raspberrypi-pico: Improves ST7735 Documentation

This commit improves the documentation about ST7735 LCD usage. Signed-off-by: Alan C. Assis <acassis@gmail.com>
2026-05-28 03:45:50 +08:00 · 2026-04-03 15:28:01 -03:00
parent 579684974a
commit 78e3f17b9e
2 changed files with 50 additions and 1 deletions
@@ -356,10 +356,59 @@ ST7735 SPI LCD.
   * - AO(D/C)
     - GP12 (SPI1 RX) (Pin 16)
   * - BL
-     - GP11 (Pin 15)
+     - GP11 (Pin 15) [1]
   * - RESET
     - GP10 (Pin 14)
 1: At least in my LCD module I don't need to connect any wire to the backlight pin (BLK) since it is enabled by default.
 After compiling and flashing the firmware in our board, run fb command.
 .. code:: console
    NuttShell (NSH) NuttX-12.13.0                                                     
    nsh> ?                                                                            
    help usage:  help [-v] [<cmd>]                                                    
        .           cp          exit        mkrd        rmdir       true              
        [           cmp         expr        mount       set         truncate          
        ?           dirname     false       mv          kill        uname             
        alias       date        fdinfo      pidof       pkill       umount            
        unalias     df          free        printf      sleep       unset             
        basename    dmesg       help        ps          usleep      uptime            
        break       echo        hexdump     pwd         source      watch             
        cat         env         ls          reboot      test        xd                
        cd          exec        mkdir       rm          time        wait              
    Builtin Apps:                                                                     
        dd          getprime    nsh         nxdemo      nxlines     sh                
        fb          hello       nx          nxhello     ostest                        
    nsh> fb
    VideoInfo:
          fmt: 11
         xres: 128
         yres: 160
      nplanes: 1
    PlaneInfo (plane 0):
        fbmem: 0x20003bf0
        fblen: 40960
       stride: 256
      display: 0
          bpp: 16                                                                     
    Mapped FB: 0x20003bf0                                                             
     0: (  0,  0) (128,160)                                                           
     1: ( 11, 14) (106,132)                                                           
     2: ( 22, 28) ( 84,104)                                                           
     3: ( 33, 42) ( 62, 76)                                                           
     4: ( 44, 56) ( 40, 48)                                                           
     5: ( 55, 70) ( 18, 20)                                                           
    Test finished                                                                     
    nsh>
 You should see this image:
 .. figure:: st7735.png
   :align: center
 tmp112
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