TFT.md
TFT boards

David Prentice's 
]]>st7735_readreg]]> 
sketch is useful to identify chipsets in various cheap 1.44" TFT displays.




  
SPI
  
TFT
  
Pin




  
MOSI
  
SDA
  
11


  
SCK
  
SCK
  
13


  
SS
  
CS
  
10


  
DC
  
AO
  
9




KMR1441_SPI V2

The backlight LED doesn't seem to be variable with PWM on this board.
Set CPPFLAGS to this in the Makefile for this display:

CPPFLAGS = -DVERSION=\"${shell date +%F}\" -DST7735GREENTAB \
    -DUSERSETUPLOADED -DST7735DRIVER -DTFTWIDTH=128 -DTFTHEIGHT=128 \
    -DTFTCS=PIND6 -DTFTDC=PIND8 \
    -DTFTRST=-1 -DSPIFREQUENCY=27000000 -DLOAD_GLCD


Bi-directional Read registers


controller reg(0x01) = 0x00
ST7735S reg(0x04) = 0x7C89F0
ST7735S reg(0x09) = 0x610000
ST7735S reg(0x0A) = 0x08
ST7735S reg(0x0B) = 0x00
ST7735S reg(0x0C) = 0x06
ST7735S reg(0x0D) = 0x00
ST7735S reg(0x0E) = 0x00
ST7735S reg(0x0F) = 0x00
ST7735S reg(0x2E) = 0x102008
ST7735S reg(0xDA) = 0x7C
ST7735S reg(0xDB) = 0x89
ST7735S reg(0xDC) = 0xF0