pye_lcd.py

#
# Wrapper for Micropython standard console IO
#
import sys


class IO_DEVICE:
    def __init__(self, Editor):
        self.init_display()
        self.init_terminal()

        Editor.KEYMAP["\x08"] = 0x08

        import busio, board

        self.uart = busio.UART(
            board.TX, board.RX, baudrate=115200, timeout=0.1, receiver_buffer_size=64
        )

        try:
            from micropython import kbd_intr

            kbd_intr(-1)
        except ImportError:
            pass

    def init_display(self):
        import fontio, displayio, terminalio, board
        from adafruit_st7789 import ST7789

        displayio.release_displays()

        spi = board.SPI()
        tft_cs = board.D12  # arbitrary, pin not used for my display
        tft_dc = board.D2
        tft_backlight = board.D4
        tft_reset = board.D3

        while not spi.try_lock():
            pass
        spi.unlock()

        display_bus = displayio.FourWire(
            spi,
            command=tft_dc,
            chip_select=tft_cs,
            reset=tft_reset,
            baudrate=24000000,
            polarity=1,
            phase=1,
        )

        self.xPixels = 240  # number of xPixels for the display
        self.yPixels = 240  # number of yPixels for the display

        self.display = ST7789(
            display_bus,
            width=self.xPixels,
            height=self.yPixels,
            rotation=0,
            rowstart=80,
            colstart=0,
        )
        self.display.show(None)

    def init_terminal(self):
        from simpleTerminal import editorTerminal

        self.terminal = editorTerminal(
            self.display, displayXPixels=self.xPixels, displayYPixels=self.yPixels
        )

    def wr(self, s):
        self.terminal.write(s)

    def rd(self):
        while True:
            myInput = self.uart.read(1)  # for using uart
            if myInput:
                return myInput.decode("utf-8")

    def rd_raw(self):  ## just to have it implemented
        return self.rd()

    def deinit_tty(self):
        self.uart.deinit()  # clear out the UART
        self.display.show(None)  # remove the groups from the display
        try:
            from micropython import kbd_intr

            kbd_intr(3)
        except ImportError:
            pass

    def get_screen_size(self):
        return self.terminal.getScreenSize()


## test, if the Editor class is already present
if "pye_edit" not in globals().keys():
    from pye import pye_edit, Editor


def pye(*args, tab_size=4, undo=50):
    io_device = IO_DEVICE(Editor)
    ret = pye_edit(args, tab_size=tab_size, undo=undo, io_device=io_device)
    io_device.deinit_tty()
    return ret