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https://github.com/russhughes/ili9342c_mpy

ILI9342C Fast 'C' Driver for MicroPython (M5Stack Core)
https://github.com/russhughes/ili9342c_mpy

ili9341 ili9342 m5stack micropython

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ILI9342C Fast 'C' Driver for MicroPython (M5Stack Core)

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README 

        
# ILI9342C Driver for MicroPython



![Image](docs/m5stack_hello.jpg)



[Video of Toaster bitmap demo](https://youtu.be/0uWsjKQmCpU)



## This is a work in progress



This driver is based on [devbis' st7789_mpy driver.](https://github.com/devbis/st7789_mpy)

I modified the original driver for one of my projects to add:



- Display Rotation and Mirroring

- Scrolling

- Drawing text using 8 and 16 bit wide bitmap fonts

- Drawing text using Hershey vector fonts

- Drawing JPG's, including a SLOW mode to draw jpg's larger than available ram

  using the TJpgDec - Tiny JPEG Decompressor R0.01d. from

  http://elm-chan.org/fsw/tjpgd/00index.html



Included are 12 bitmap fonts derived from classic pc text mode fonts, 26

Hershey vector fonts and several example programs that run on the M5Stack Core.

This driver supports 320x240 displays.



## Pre-compiled MicroPython firmware



The firmware directory contains MicroPython v1.16 firmware.bin files with the ILI9342C C driver and frozen python font files compiled with ESP-IDF 4.2 using the CMake build system.



## Thanks go out to:



- https://github.com/devbis for the original driver this is based on.

- https://github.com/hklang10 for letting me know of the new mp_raise_ValueError().

- https://github.com/aleggon for finding the correct offsets for a 240x240

  display and discovering issues compiling for STM32 based boards.



-- Russ



## Overview



This is a driver for MicroPython to handle displays based on the ILI9342C chip.



## Building instruction



Prepare build tools as described in the manual. You should follow the

instruction for building MicroPython and ensure that you can build the

firmware without this display module.



Clone this module alongside the MPY sources:



    $ git clone https://github.com/russhughes/ili9342c_mpy.git



Go to MicroPython ports directory:



    $ cd micropython/ports/esp32



And then compile the module setting USER_C_MODULES to the directory with the

driver source code.



    $ make USER_C_MODULES=../../../ili9342c_mpy/ all



Upload the resulting firmware to your device using the esptool.py program.

(See

[MicroPython docs](http://docs.micropython.org/en/latest/esp8266/tutorial/intro.html#deploying-the-firmware)

for more info)



## CMake building instructions for MicroPython 1.14 and later



for ESP32:



    $ cd micropython/ports/esp32



And then compile the module with specified USER_C_MODULES dir



    $ make USER_C_MODULES=../../../../ili9342c_mpy/src/micropython.cmake all



Erase the target device if this is the first time uploading this firmware



    $ make USER_C_MODULES=../../../../ili9342c_mpy/src/micropython.cmake erase



Upload the new firmware



    $ make USER_C_MODULES=../../../../ili9342c_mpy/src/micropython.cmake deploy



### Additional build parameters



Additional build parameters may be specified during the build, erase and upload operations by including them after the `make` command. For example you can specify the DEBUG flag, Upload BAUD rate, alternate partition.csv file for different flash sizes and the USB serial port.



      make -j 4 \

        DEBUG=1 \

        BOARD=M5CORE2 \

        BAUD=3000000 \

        PART_SRC=partitions-16MiB.csv \

        PORT=/dev/tty.SLAB_USBtoUART \

        USER_C_MODULES=../../../../ili9342c_mpy/src/micropython.cmake all



## Examples



This module was tested on M5Stack Core and M5Stack Core 2 devices and should run on other ESP32 devices that are able run GENERIC MicroPython Firmware. See the examples folder for sample programs.



    # ESP32



    import machine

    import ili9342c

    spi = machine.SPI(2, baudrate=40000000, polarity=1, phase=1, sck=Pin(18), mosi=Pin(23)),

    display = ili9342c.ILI9342C(

        spi,

        320,

        240,

        reset=Pin(33, Pin.OUT),

        cs=Pin(14, Pin.OUT),

        dc=Pin(27, Pin.OUT),

        backlight=Pin(32, Pin.OUT),

        rotation=0)



## Methods



- `ili9342c.ILI9342C(spi, width, height, reset, dc, cs, backlight, rotation, buffer_size)`



    required args:



        `spi` spi device

        `width` display width

        `height` display height



    optional args:



        `reset` reset pin

        `dc` dc pin

        `cs` cs pin

        `backlight` backlight pin

        `rotation`

        `buffer_size` 0= buffer dynamically allocated and freed as needed.



        Rotation | Orientation

        -------- | --------------------

           0     | 0 degrees

           1     | 90 degrees

           2     | 180 degrees

           3     | 270 degrees

           4     | 0 degrees mirrored

           5     | 90 degrees mirrored

           6     | 180 degrees mirrored

           7     | 270 degrees mirrored



        If buffer_size is specified it must be large enough to contain the largest

        bitmap and/or JPG used (Rows * Columns *2 bytes).



This driver supports only 16bit colors in RGB565 notation.



- `ILI9342C.fill(color)`



  Fill the entire display with the specified color.



- `ILI9342C.pixel(x, y, color)`



  Set the specified pixel to the given color.



- `ILI9342C.line(x0, y0, x1, y1, color)`



  Draws a single line with the provided `color` from (`x0`, `y0`) to

  (`x1`, `y1`).



- `ILI9342C.hline(x, y, length, color)`



  Draws a single horizontal line with the provided `color` and `length`

  in pixels. Along with `vline`, this is a fast version with reduced

  number of SPI calls.



- `ILI9342C.vline(x, y, length, color)`



  Draws a single horizontal line with the provided `color` and `length`

  in pixels.



- `ILI9342C.rect(x, y, width, height, color)`



  Draws a rectangle from (`x`, `y`) with corresponding dimensions



- `ILI9342C.fill_rect(x, y, width, height, color)`



  Fill a rectangle starting from (`x`, `y`) coordinates



- `ILI9342C.blit_buffer(buffer, x, y, width, height)`



  Copy bytes() or bytearray() content to the screen internal memory.

  Note: every color requires 2 bytes in the array



- `ILI9342C.text(bitap_font, s, x, y[, fg, bg])`



  Write text to the display using the specified bitmap font with the

  coordinates as the upper-left corner of the text. The foreground and

  background colors of the text can be set by the optional arguments fg and bg,

  otherwise the foreground color defaults to `WHITE` and the background color

  defaults to `BLACK`.  See the README.md in the fonts directory for example

  fonts.



- `ILI9342C.write(bitap_font, s, x, y[, fg, bg])`



  Write text to the display using the specified proportional or Monospace bitmap

  font module with the coordinates as the upper-left corner of the text. The

  foreground and background colors of the text can be set by the optional

  arguments fg and bg, otherwise the foreground color defaults to `WHITE` and

  the background color defaults to `BLACK`.  See the `README.md` in the

  `truetype/fonts` directory for example fonts. Returns the width of the string

  as printed in pixels.



  The `font2bitmap` utility creates compatible 1 bit per pixel bitmap modules

  from Proportional or Monospaced True Type fonts. The character size,

  foreground, background colors and the characters to include in the bitmap

  module may be specified as parameters. Use the -h option for details. If you

  specify a buffer_size during the display initialization it must be large

  enough to hold the widest character (HEIGHT * MAX_WIDTH * 2).



- `ILI9342C.write_len(bitap_font, s)`



  Returns the width of the string in pixels if printed in the specified font.



- `ILI9342C.draw(vector_font, s, x, y[, fg, bg])`



  Draw text to the display using the specified hershey vector font with the

  coordinates as the lower-left corner of the text. The foreground and

  background colors of the text can be set by the optional arguments fg and bg,

  otherwise the foreground color defaults to `WHITE` and the background color

  defaults to `BLACK`.  See the README.md in the fonts directory for example

  fonts and the utils directory for a font conversion program.



- `LI9342C.jpg(jpg_filename, x, y [, method])`



  Draw JPG file on the display at the given x and y coordinates as the upper

  left corner of the image. There memory required to decode and display a JPG

  can be considerable as a full screen 320x240 JPG would require at least 3100

  bytes for the working area + 320x240x2 bytes of ram to buffer the image. Jpg

  images that would require a buffer larger than available memory can be drawn

  by passing SLOW for method. The SLOW method will draw the image a piece at a

  time using the Minimum Coded Unit (MCU, typically 8x8 pixels).



- `ILI9342C.bitmap(bitmap, x , y [, index])`



  Draw bitmap using the specified x, y coordinates as the upper-left corner of

  the of the bitmap. The optional index parameter provides a method to select

  from multiple bitmaps contained a bitmap module. The index is used to

  calculate the offset to the beginning of the desired bitmap using the modules

  HEIGHT, WIDTH and BPP values.



  ### Bitmap Utilities in the utils folder



  `imgtobitmap.py` creates compatible bitmap modules from image files using the

  Pillow Python Imaging Library.



  `monofont2bitmap.py` creates compatible bitmap modules from Monospaced True

  Type fonts. See the `inconsolata_16.py`, `inconsolata_32.py` and

  `inconsolata_64.py` files in the `examples/lib` folder for sample modules and

  the `mono_font.py` program for an example on how to use the modules.  The

  character sizes, bit per pixel, foreground, background colors and the

  characters to include as bitmaps may be specified as parameters. Use the -h

  option for details. Bits per pixel settings larger than one may be used to

  create antialiased characters at the expense of memory use.  If you specify

  a buffer_size during the display initialization it must be large enough to

  hold the one character (HEIGHT * WIDTH * 2).



- `ILI9342C.width()`



  Returns the current logical width of the display. (ie a 320x240 display

  rotated 90 degrees is 240 pixels wide)



- `ILI9342C.height()`



  Returns the current logical height of the display. (ie a 320x240 display

  rotated 90 degrees is 320 pixels high)



- `ILI9342C.rotation(r)`



  Set the rotates the logical display in a clockwise direction. 0-Portrait

  (0 degrees), 1-Landscape (90 degrees), 2-Inverse Portrait (180 degrees),

  3-Inverse Landscape (270 degrees)



  Rotations 4-7 are mirrors of Rotations 0-3 for use with ILI9341 Displays

  4-Portrait (0 degrees) Mirrored, 1-Landscape (90 degrees) Mirrored, 2-Inverse

  Portrait (180 degrees) Mirrored, 3-Inverse Landscape (270 degrees) Mirrored.



The module exposes predefined colors:

  `BLACK`, `BLUE`, `RED`, `GREEN`, `CYAN`, `MAGENTA`, `YELLOW`, and `WHITE`



## Helper functions



- `color565(r, g, b)`



  Pack a color into 2-bytes rgb565 format



- `map_bitarray_to_rgb565(bitarray, buffer, width, color=WHITE, bg_color=BLACK)`



  Convert a bitarray to the rgb565 color buffer which is suitable for blitting.

  Bit 1 in bitarray is a pixel with `color` and 0 - with `bg_color`.



  This is a helper with a good performance to print text with a high

  resolution font. You can use an awesome tool

  https://github.com/peterhinch/micropython-font-to-py

  to generate a bitmap fonts from .ttf and use them as a frozen bytecode from

  the ROM memory.