MicroPython for M5Stack CORE2

This repository extends LV-MicroPython for using it on the M5Stack Core2. It adds support for the:

• MPU6886: a 6-axis MotionTracking device that combines a 3-axis gyroscope and a 3-axis accelerometer
• ILI9342C: a-Si TFT LCD Single Chip Driver.
• BM8563: a CMOS1 Real-Time Clock (RTC) and calendar optimized for low power consumption.
• AXP192: a enhanced single Cell Li-Battery and Power System Management IC

Examples

More examples can be found inside the examples folder.

Drag Me Example	Buttons Example

import gc
import lvgl as lv

from axpili9342 import ili9341
from ft6x36c import ft6x36

display = ili9341()
touch = ft6x36()

def drag_event_handler(e):
    obj = e.get_target()
    indev = lv.indev_get_act()
    vect = lv.point_t()
    indev.get_vect(vect)
    x = obj.get_x() + vect.x
    y = obj.get_y() + vect.y
    obj.set_pos(x, y)

obj = lv.obj(lv.scr_act())
obj.set_size(150, 100)
obj.add_event_cb(drag_event_handler, lv.EVENT.PRESSING, None)

label = lv.label(obj)
label.set_text("Drag me")
label.center()

Firmware

I've included a compiled MicroPython firmware (check the firmware folder). The firmware was compiled using following versions and hashes:

• esp-idf v4.4.x - b64925c56
• MicroPython v1.18-599-bf62dfc784-dirty - bf62dfc784

To flash it to the board, you need to type the following:

esptool.py --chip esp32 --port /dev/ttyUSB0 erase_flash
esptool.py --chip esp32 --port /dev/ttyUSB0 --baud 1152000 write_flash -z 0x1000 lv_micropython_m5core2_bf62dfc784_esp32_idf4_4_x.bin

More information is available in this tutorial.

If you want to compile your driver from scratch follow the next section:

DIY

Read this section if you want to include the camera support to MicroPython from scratch. To do that follow these steps:

• Note 1: if you get stuck, those pages are a good help:

  • https://github.com/micropython/micropython/tree/master/ports/esp32
  • https://docs.espressif.com/projects/esp-idf/en/stable/esp32/get-started/index.html#installation-step-by-step

• Note 2: Up to micropython version 1.14, the build tool for the esp32 port is Make. Starting with this PR, it is CMAKE. You can find more discussion in this micropython forum blog post

1. Clone the MicroPython repository:

   git clone --recursive https://github.com/littlevgl/lv_micropython.git

   Note: The MicroPython repo changes a lot, I've done this using the version with the hash mentioned above.

   :warning: If you want to directly replace the original files with the provided in this repository, be sure that you've taken the same commit hash. MicroPython changes a lot, and you'll compiling issues if you ignore this warning.

2. Copy the files and folders inside the boards folder into micropython/ports/esp32/boards or use a symbolic link (ln -s).

3. Create a m5core2 folder inside ~/esp/esp-idf/components and copy the files and folders inside the components inside that folder.

4. Compile the firmware by typing following commands:

   cd micropython/ports/esp32
   . $HOME/esp/esp-idf/export.sh
   make USER_C_MODULES=../../../../micropython-core2/src/micropython.cmake BOARD=M5STACK_CORE2 all

   Note that the folder micropython-core2 should be in the same folder level as the micropython. Otherwise, you'll need to change the path (../../../../micropython-core2/src/) to the micropython.cmake file.

5. Deploy the firmware into the ESP32 by typing:

   cd micropython/ports/esp32
   esptool.py --port /dev/ttyUSB0 erase_flash
   esptool.py --chip esp32 --port /dev/ttyUSB0 --baud 1152000 write_flash -z 0x1000 build-M5STACK_CORE2/firmware.bin