Den 21.12.2017 20.35, skrev David Lechner:
On 12/21/2017 01:23 PM, David Lechner wrote:
This adds a new driver for Sitronix ST7735R display panels.
This has been tested using an Adafruit 1.8" TFT.
Signed-off-by: David Lechner <david@xxxxxxxxxxxxxx>
---
<snip>
+ mipi_dbi_command(mipi, ST7735R_GAMCTRP1, 0x0f, 0x1a, 0x0f, 0x18,
0x2f,
+ 0x28, 0x20, 0x22, 0x1f, 0x1b, 0x23, 0x37, 0x00, 0x07,
+ 0x02, 0x10);
+ mipi_dbi_command(mipi, ST7735R_GAMCTRN1, 0x0f, 0x1b, 0x0f, 0x17,
0x33,
+ 0x2c, 0x29, 0x2e, 0x30, 0x30, 0x39, 0x3f, 0x00, 0x07,
+ 0x03, 0x10);
By the way, how do you know what is the "right" gamma curve? I think I
copied this from the generic st7735r driver in fbtft, but I noticed
that there is also a different curve for the Adafruit 1.8" display in
fbtft. I'm wondering if I should have used that one instead. I can't
really tell a difference looking at the display.
From what I can tell this is the curve used by the Arduino library:
https://github.com/adafruit/Adafruit-ST7735-Library/blob/master/Adafruit_ST7735.cpp
static const uint8_t PROGMEM
Rcmd3[] = { // Init for 7735R, part 3 (red or green tab)
4, // 4 commands in list:
ST7735_GMCTRP1, 16 , // 1: Magical unicorn dust, 16 args, no
delay:
0x02, 0x1c, 0x07, 0x12,
0x37, 0x32, 0x29, 0x2d,
0x29, 0x25, 0x2B, 0x39,
0x00, 0x01, 0x03, 0x10,
ST7735_GMCTRN1, 16 , // 2: Sparkles and rainbows, 16 args, no
delay:
0x03, 0x1d, 0x07, 0x06,
0x2E, 0x2C, 0x29, 0x2D,
0x2E, 0x2E, 0x37, 0x3F,
0x00, 0x00, 0x02, 0x10,
void Adafruit_ST7735::initR(uint8_t options) {
commonInit(Rcmd1);
...
commandList(Rcmd3);
Noralf.
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