Mercurial > d1workshop
changeset 49:7755717740dc
Add TFT shield
| author | Radomir Dopieralski <sheep-devel@sheep.art.pl> |
|---|---|
| date | Fri, 07 Jul 2017 18:59:11 +0200 |
| parents | d2b66c111e26 |
| children | 6482082f9187 |
| files | shields.rst |
| diffstat | 1 files changed, 24 insertions(+), 4 deletions(-) [+] |
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--- a/shields.rst Fri Nov 25 17:01:02 2016 +0100 +++ b/shields.rst Fri Jul 07 18:59:11 2017 +0200 @@ -161,8 +161,8 @@ board to work. You can simply plug it in and use it. -Servo -===== +Servo (Custom) +============== There is an experimental 18-channel servo shield. It uses the I²C protocol on pins ``gpio4`` and ``gpio5`` and is compatible with other I²C shields. @@ -173,9 +173,29 @@ You can set the servo positions using the following code:: - from d1servo18ch import Servos + from servo import Servos from machine import I2C, Pin i2c = I2C(Pin(5), Pin(4)) servos = Servos(i2c) - servos[0] = 1500 + servos.position(0, degrees=45) + + +TFT Screen (Custom) +=================== + +There is an experimental breakout board for the ST7735 TFT screen. It uses the +SPI interface on pins ``gpio12``, ``gpio13``, ``gpio14``, and ``gpio15``. + +You can use it with the following example code:: + from machine import Pin, SPI + import st7735 + from rgb import DummyPin + + display = st7735.ST7735(SPI(1), dc=Pin(12), cs=DummyPin(), rst=Pin(15)) + display.fill(0x7521) + display.pixel(64, 64, 0) + +If you have a display with a red tab, you need to use a different initialization:: + + display = st7735.ST7735R(SPI(1, baudrate=40000000), dc=Pin(12), cs=DommyPin(), rst=Pin(15))