kopia lustrzana https://github.com/peterhinch/micropython-nano-gui
Add ILI9486 driver.
peterhinch
rodzic
7eb050b03e
commit
74f0d1e083
47
DISPLAYS.md
47
DISPLAYS.md
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@ -13,28 +13,29 @@ owing to their long update time.
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Size is diagonal in inches. C/M/GS color/monochrome/greyscale.
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Width and height are pixels.
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| Size | Width | Height | Tech | Driver | Description | Notes |
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|:------:|:-----:|:------:|:------|:--------------|:---------------------------|:------|
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| 0.96C | 94 | 64 | OLED | [SSD1331][1d] | [Adafruit 684][1m] | |
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| 1.12GS | 96 | 96 | OLED | [SSD1327][11d]| [Seeed 104030011][21m] | Obsolescent |
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| 1.27C | 128 | 96 | OLED | [SSD1351][2d] | [Adafruit 1673][2m] | |
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| 1.5C | 128 | 128 | OLED | [SSD1351][2d] | [Adafruit 1431][3m] | |
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| 1.44C | 128 | 128 | TFT | [ST7735R][4d] | [Adafruit 2088][5m] | |
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| 1.5C | 160 | 128 | TFT | [ST7735R][4d] | [Adafruit 358][6m] | |
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| 1.3C | 240 | 240 | TFT | [ST7789][5d] | [Adafruit 4313][7m] | |
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| 1.5GS | 128 | 128 | OLED | [SSD1327][11d]| [Waveshare 13992][20m] | |
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| 2.0C | 320 | 240 | TFT | [ST7789][5d] | [Waveshare Pico LCD 2][18m]| For Pi Pico |
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| 1.54C | 240 | 240 | TFT | [ST7789][5d] | [Adafruit 3787][8m] | |
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| 1.14C | 240 | 135 | TFT | [ST7789][5d] | [T-Display][9m] | ESP32 with attached display |
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| 2.8C | 320 | 240 | TFT | [ST7789][5d] | [Waveshare pico 2.8][10m] | Display for Pi Pico |
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| 1.14C | 240 | 135 | TFT | [ST7789][5d] | [Waveshare pico 1.14][11m] | For Pi Pico. Buttons good for micro-gui |
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| 3.2C | 320 | 240 | TFT | [ILI9341][6d] | [Adafruit 1743][12m] | Big display. eBay equivalents work here. |
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| 2.9M | 296 | 128 | eInk | [UC8151D][7d] | [Adafruit 4262][13m] | Flexible ePaper display |
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| 2.9M | 296 | 128 | eInk | [UC8151D][7d] | [Adafruit 4777][15m] | FeatherWing ePaper display |
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| 4.2M | 400 | 300 | eInk | [WS][10d] | [Waveshare pico 4.2][19m] | Pico, Pico W plug in. Other hosts via cable |
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| 2.7M | 274 | 176 | eInk | [HAT][8d] | [Waveshare HAT][14m] | HAT designed for Raspberry Pi, repurposed. |
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| 2.7M | 400 | 240 | Sharp | [Sharp][9d] | [Adafruit 4694][16m] | Micropower monochrome display. |
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| 1.3M | 168 | 144 | Sharp | [Sharp][9d] | [Adafruit 3502][17m] | Ditto |
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| Size | Width | Height | Tech | Driver | Description | Notes |
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|:------:|:-----:|:------:|:------|:--------------|:----------------------------|:------|
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| 0.96C | 94 | 64 | OLED | [SSD1331][1d] | [Adafruit 684][1m] | |
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| 1.12GS | 96 | 96 | OLED | [SSD1327][11d]| [Seeed 104030011][21m] | Obsolescent |
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| 1.27C | 128 | 96 | OLED | [SSD1351][2d] | [Adafruit 1673][2m] | |
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| 1.5C | 128 | 128 | OLED | [SSD1351][2d] | [Adafruit 1431][3m] | |
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| 1.44C | 128 | 128 | TFT | [ST7735R][4d] | [Adafruit 2088][5m] | |
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| 1.5C | 160 | 128 | TFT | [ST7735R][4d] | [Adafruit 358][6m] | |
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| 1.3C | 240 | 240 | TFT | [ST7789][5d] | [Adafruit 4313][7m] | |
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| 1.5GS | 128 | 128 | OLED | [SSD1327][11d]| [Waveshare 13992][20m] | |
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| 2.0C | 320 | 240 | TFT | [ST7789][5d] | [Waveshare Pico LCD 2][18m] | For Pi Pico |
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| 1.54C | 240 | 240 | TFT | [ST7789][5d] | [Adafruit 3787][8m] | |
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| 1.14C | 240 | 135 | TFT | [ST7789][5d] | [T-Display][9m] | ESP32 with attached display |
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| 2.8C | 320 | 240 | TFT | [ST7789][5d] | [Waveshare pico 2.8][10m] | Display for Pi Pico |
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| 1.14C | 240 | 135 | TFT | [ST7789][5d] | [Waveshare pico 1.14][11m] | For Pi Pico. Buttons good for micro-gui |
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| 3.2C | 320 | 240 | TFT | [ILI9341][6d] | [Adafruit 1743][12m] | Big display. eBay equivalents work here. |
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| 3.5C | 480 | 320 | TFT | [ILI9486][12d]| [Waveshare Rpi 3.5 LCD][22m]| Pi HAT. Many pixels. Needs plenty of RAM. |
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| 2.9M | 296 | 128 | eInk | [UC8151D][7d] | [Adafruit 4262][13m] | Flexible ePaper display |
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| 2.9M | 296 | 128 | eInk | [UC8151D][7d] | [Adafruit 4777][15m] | FeatherWing ePaper display |
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| 4.2M | 400 | 300 | eInk | [WS][10d] | [Waveshare pico 4.2][19m] | Pico, Pico W plug in. Other hosts via cable |
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| 2.7M | 274 | 176 | eInk | [HAT][8d] | [Waveshare HAT][14m] | HAT designed for Raspberry Pi, repurposed. |
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| 2.7M | 400 | 240 | Sharp | [Sharp][9d] | [Adafruit 4694][16m] | Micropower monochrome display. |
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| 1.3M | 168 | 144 | Sharp | [Sharp][9d] | [Adafruit 3502][17m] | Ditto |
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## Displays using compatible drivers
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@ -89,6 +90,7 @@ simple. See [this doc](./DRIVERS.md#7-writing-device-drivers) for details.
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[9d]: https://github.com/peterhinch/micropython-nano-gui/blob/master/DRIVERS.md#4-drivers-for-sharp-displays
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[10d]: https://github.com/peterhinch/micropython-nano-gui/blob/master/DRIVERS.md#53-waveshare-400x300-pi-pico-display
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[11d]: https://github.com/peterhinch/micropython-nano-gui/blob/master/DRIVERS.md#23-drivers-for-ssd1327
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[12d]: https://github.com/peterhinch/micropython-nano-gui/blob/master/DRIVERS.md#34-driver-for-ili9486
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[1m]: https://www.adafruit.com/product/684
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[2m]: https://www.adafruit.com/product/1673
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@ -111,3 +113,4 @@ simple. See [this doc](./DRIVERS.md#7-writing-device-drivers) for details.
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[19m]: https://thepihut.com/collections/epaper-displays-for-raspberry-pi/products/4-2-e-paper-display-module-for-raspberry-pi-pico-black-white-400x300
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[20m]: https://www.waveshare.com/product/ai/displays/oled/1.5inch-oled-module.htm?___SID=U
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[21m]: https://www.seeedstudio.com/Grove-OLED-Display-1-12.html?queryID=080778ddd8f54df96ca0e016af616327&objectID=1763&indexName=bazaar_retailer_products
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[22m]: https://www.waveshare.com/product/3.5inch-rpi-lcd-a.htm
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66
DRIVERS.md
66
DRIVERS.md
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@ -40,6 +40,7 @@ access via the `Writer` and `CWriter` classes is documented
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3.3.2 [Waveshare Pico Res Touch](./DRIVERS.md#332-waveshare-pico-res-touch)
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3.3.3 [Waveshare Pico LCD 2](./DRIVERS.md#333-waveshare-pico-lcd-2)
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3.3.4 [Troubleshooting](./DRIVERS.md#334-troubleshooting)
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3.4 [3.4 Driver for ILI9486](./DRIVERS.md#34-driver-for-ili9486) Very large display needs plenty of RAM
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4. [Drivers for sharp displays](./DRIVERS.md#4-drivers-for-sharp-displays) Large low power monochrome displays
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4.1 [Display characteristics](./DRIVERS.md#41-display-characteristics)
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4.1.1 [The VCOM bit](./DRIVERS.md#411-the-vcom-bit)
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@ -635,6 +636,71 @@ If your display shows garbage, check the following (I have seen both):
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* `height` and `width` not matching the choice of `LANDSCAPE` or `PORTRAIT`
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display mode.
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## 3.4 Driver for ILI9486
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This was tested with
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[this display](https://www.waveshare.com/product/3.5inch-RPi-LCD-A.htm), a
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480x320 color LCD designed for the Raspberry Pi. Note that even with 4-bit
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color the display buffer is 76,800 bytes. On a Pico `nanogui` works fine, but
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`micro-gui` runs out of RAM.
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##### Wiring
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This shows the Raspberry Pi connector looking at the underside of the board
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with the bulk of the board to the right. This was tested with a Pi Pico.
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Connections may be adapted for other MicroPython targets. The board may be
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powered from 5V or 3.3V: there is a regulator on board.
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| Pico | | L | R | | Pico |
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|:-----|:-----|:--:|:--:|:-----|:-----|
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| Vin | VIN | 2 | 1 | 3V3 | |
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| | | 4 | 3 | | |
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| | | 6 | 5 | | |
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| | | 8 | 7 | | |
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| | | 10 | 9 | GND | Gnd |
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| | | 12 | 11 | | |
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| | | 14 | 13 | | |
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| | | 16 | 15 | | |
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| 17 | DC | 18 | 17 | | |
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| | | 20 | 19 | MOSI | 3 |
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| 7 | RST | 22 | 21 | | |
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| 14 | CS | 24 | 23 | SCLK | 6 |
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| | | 25 | 26 | | |
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#### ILI486 Constructor args:
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* `spi` An initialised SPI bus instance. The device can support clock rates of
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upto 10MHz.
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* `cs` An initialised output pin. Initial value should be 1.
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* `dc` An initialised output pin. Initial value should be 0.
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* `rst` An initialised output pin. Initial value should be 1.
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* `height=320` Display dimensions in pixels. For portrait mode exchange
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`height` and `width` values.
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* `width=480`
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* `usd=False` Upside down: set `True` to invert display.
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* `init_spi=False` This optional arg enables flexible options in configuring
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the SPI bus. The default assumes exclusive access to the bus. In this normal
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case, `color_setup.py` initialises it and the settings will be left in place.
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If the bus is shared with devices which require different settings, a callback
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function should be passed. It will be called prior to each SPI bus write. The
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callback will receive a single arg being the SPI bus instance. It will
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typically be a one-liner or lambda initialising the bus. A minimal example is
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this function:
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```python
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def spi_init(spi):
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spi.init(baudrate=10_000_000)
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```
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The ILI9486 class uses 4-bit color to conserve RAM. Even with this adaptation
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the buffer size is 76.85KiB. See [Color handling](./DRIVERS.md#11-color-handling)
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for details of the implications of 4-bit color. On the Pico with the display
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driver loaded there was 85KiB free RAM running `nano-gui` but `micro-gui` ran
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out of RAM..
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The driver uses the `micropython.viper` decorator. If your platform does not
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support this, comment it out and remove the type annotations. You may be able
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to use the `micropython.native` decorator.
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###### [Contents](./DRIVERS.md#contents)
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# 4. Drivers for sharp displays
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@ -0,0 +1,194 @@
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# ILI9486 nano-gui driver for ili9486 displays
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# As with all nano-gui displays, touch is not supported.
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# Copyright (c) Peter Hinch 2022
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# Released under the MIT license see LICENSE
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# Inspired by @brave-ulysses https://github.com/micropython/micropython/discussions/10404
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# Design note. I could not find a way to do landscape display at the chip level
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# without a nasty hack. Consequently this driver uses portrait mode at chip level,
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# with rotation performed in the driver.
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from time import sleep_ms
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import gc
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import framebuf
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import uasyncio as asyncio
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from drivers.boolpalette import BoolPalette
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# Portrait mode
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@micropython.viper
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def _lcopy(dest:ptr16, source:ptr8, lut:ptr16, length:int):
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# rgb565 - 16bit/pixel
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n = 0
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for x in range(length):
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c = source[x]
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dest[n] = lut[c >> 4] # current pixel
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n += 1
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dest[n] = lut[c & 0x0f] # next pixel
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n += 1
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# FB is in landscape mode, hence issue a column at a time to portrait mode hardware.
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@micropython.viper
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def _lscopy(dest:ptr16, source:ptr8, lut:ptr16, ch:int):
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col = ch & 0x1ff # Unpack (viper 4 parameter limit)
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height = (ch >> 9) & 0x1ff
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wbytes = ch >> 19 # Width in bytes is width // 2
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# rgb565 - 16bit/pixel
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n = 0
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clsb = col & 1
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idx = col >> 1 # 2 pixels per byte
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for _ in range(height):
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if clsb:
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c = source[idx] & 0x0f
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else:
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c = source[idx] >> 4
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dest[n] = lut[c] # 16 bit transfer of rightmost 4-bit pixel
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n += 1 # 16 bit
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idx += wbytes
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class ILI9486(framebuf.FrameBuffer):
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lut = bytearray(32)
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# Convert r, g, b in range 0-255 to a 16 bit colour value
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# LS byte goes into LUT offset 0, MS byte into offset 1
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# Same mapping in linebuf so LS byte is shifted out 1st
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# ILI9486 expects RGB order. 8 bit register writes require padding
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@staticmethod
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def rgb(r, g, b):
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return (r & 0xf8) | (g & 0xe0) >> 5 | (g & 0x1c) << 11 | (b & 0xf8) << 5
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# Transpose width & height for landscape mode
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def __init__(self, spi, cs, dc, rst, height=320, width=480, usd=False, init_spi=False):
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self._spi = spi
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self._cs = cs
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self._dc = dc
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self._rst = rst
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self.height = height # Logical dimensions for GUIs
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self.width = width
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self._long = max(height, width) # Physical dimensions of screen and aspect ratio
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self._short = min(height, width)
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self._spi_init = init_spi
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pmode = framebuf.GS4_HMSB
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self.palette = BoolPalette(pmode)
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gc.collect()
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buf = bytearray(height * width // 2)
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self._mvb = memoryview(buf)
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super().__init__(buf, width, height, pmode) # Logical aspect ratio
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self._linebuf = bytearray(self._short * 2)
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# Hardware reset
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self._rst(0)
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sleep_ms(50)
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self._rst(1)
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sleep_ms(50)
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if self._spi_init: # A callback was passed
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self._spi_init(spi) # Bus may be shared
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self._lock = asyncio.Lock()
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# Send initialization commands
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self._wcmd(b'\x01') # SWRESET Software reset
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sleep_ms(100)
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self._wcmd(b'\x11') # sleep out
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sleep_ms(20)
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self._wcd(b'\x3a', b'\x55') # interface pixel format
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self._wcd(b'\x36', b'\x48' if usd else b'\x88') # MADCTL: RGB portrait mode
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self._wcmd(b'\x11') # sleep out
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self._wcmd(b'\x29') # display on
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# Write data.
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def _wdata(self, data):
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self._dc(1)
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self._cs(0)
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self._spi.write( data )
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self._cs(1)
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# Write a command.
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def _wcmd(self, command):
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self._dc(0)
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self._cs(0)
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self._spi.write( command )
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self._cs(1)
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# Write a command followed by a data arg.
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def _wcd(self, command, data):
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self._dc(0)
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self._cs(0)
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self._spi.write( command )
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self._cs(1)
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self._dc(1)
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self._cs(0)
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self._spi.write( data )
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self._cs(1)
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@micropython.native
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def show(self): # Physical display is in portrait mode
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clut = ILI9486.lut
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lb = self._linebuf
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buf = self._mvb
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if self._spi_init: # A callback was passed
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self._spi_init(self._spi) # Bus may be shared
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# Commands needed to start data write
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self._wcd(b'\x2a', int.to_bytes(self._short -1, 4, 'big')) # SET_COLUMN works 0 .. width
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self._wcd(b'\x2b', int.to_bytes(self._long -1, 4, 'big')) # SET_PAGE ht
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self._wcmd(b'\x2c') # WRITE_RAM
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self._dc(1)
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self._cs(0)
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if self.width < self.height: # Portrait 214ms on RP2 120MHz, 30MHz SPI clock
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wd = self.width // 2
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ht = self.height
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for start in range(0, wd*ht, wd): # For each line
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_lcopy(lb, buf[start :], clut, wd) # Copy and map colors
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self._spi.write(lb)
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else: # Landscpe 264ms on RP2 120MHz, 30MHz SPI clock
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cargs = (self.height << 9) + (self.width << 18) # Viper 4-arg limit
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for col in range(self.width -1, -1, -1): # For each column of landscape display
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_lscopy(lb, buf, clut, col + cargs) # Copy and map colors
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self._spi.write(lb)
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self._cs(1)
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async def do_refresh(self, split=4):
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async with self._lock:
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lines, mod = divmod(self._long, split) # Lines per segment
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if mod:
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raise ValueError('Invalid do_refresh arg.')
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clut = ILI9486.lut
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lb = self._linebuf
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buf = self._mvb
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self._wcd(b'\x2a', int.to_bytes(self._short -1, 4, 'big')) # SET_COLUMN works 0 .. width
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self._wcd(b'\x2b', int.to_bytes(self._long -1, 4, 'big')) # SET_PAGE ht
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self._wcmd(b'\x2c') # WRITE_RAM
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self._dc(1)
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if self.width < self.height: # Portrait: write sets of rows
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wd = self.width // 2
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ht = self.height
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line = 0
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for _ in range(split): # For each segment
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if self._spi_init: # A callback was passed
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self._spi_init(self._spi) # Bus may be shared
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self._cs(0)
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for start in range(wd * line, wd * (line + lines), wd): # For each line
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_lcopy(lb, buf[start :], clut, wd) # Copy and map colors
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self._spi.write(lb)
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line += lines
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self._cs(1) # Allow other tasks to use bus
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await asyncio.sleep_ms(0)
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else: # Landscape: write sets of cols. lines is no. of cols per segment.
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cargs = (self.height << 9) + (self.width << 18) # Viper 4-arg limit
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sc = self.width -1 # Start and end columns
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ec = sc - lines # End column
|
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for _ in range(split): # For each segment
|
||||
if self._spi_init: # A callback was passed
|
||||
self._spi_init(self._spi) # Bus may be shared
|
||||
self._cs(0)
|
||||
for col in range(sc, ec, -1): # For each column of landscape display
|
||||
_lscopy(lb, buf, clut, col + cargs) # Copy and map colors
|
||||
self._spi.write(lb)
|
||||
sc -= lines
|
||||
ec -= lines
|
||||
self._cs(1) # Allow other tasks to use bus
|
||||
await asyncio.sleep_ms(0)
|
||||
|
||||
|
|
@ -0,0 +1,18 @@
|
|||
# ili9486_pico.py Customise for your hardware config and rename
|
||||
|
||||
# Released under the MIT License (MIT). See LICENSE.
|
||||
|
||||
# ILI9486 on Pi Pico
|
||||
# See DRIVERS.md for wiring details.
|
||||
|
||||
from machine import Pin, SPI
|
||||
import gc
|
||||
|
||||
from drivers.ili94xx.ili9486 import ILI9486 as SSD
|
||||
|
||||
pdc = Pin(17, Pin.OUT, value=0)
|
||||
pcs = Pin(14, Pin.OUT, value=1)
|
||||
prst = Pin(7, Pin.OUT, value=1)
|
||||
spi = SPI(0, sck=Pin(6), mosi=Pin(3), miso=Pin(4), baudrate=30_000_000)
|
||||
gc.collect() # Precaution before instantiating framebuf
|
||||
ssd = SSD(spi, pcs, pdc, prst)
|
||||
Ładowanie…
Reference in New Issue