terminalio demo

terminal_vt100.py

# SPDX-FileCopyrightText: Copyright (c) 2021 Randall Bohn (dexter)
#
# SPDX-License-Identifier: MIT
"""
Demonstrate usage of the terminalio module.

The module provides a VT100 emulation within a displayo.TileGrid.
A good reference for VT100 "escape" codes is found at
https://www.csie.ntu.edu.tw/~r92094/c++/VT100.html
"""
import random
import time
import board
import displayio
import terminalio

display = board.DISPLAY
splash = displayio.Group()
display.show(splash)

palette = displayio.Palette(2)
palette[0]=0x220000
palette[1]=0x00FFFF

ROWS=12
COLS=40

w,h = terminalio.FONT.get_bounding_box()

termgrid = displayio.TileGrid(terminalio.FONT.bitmap, pixel_shader=palette, y=20,
    width=COLS, height=ROWS,
    tile_width=w, tile_height=h)

splash.append(termgrid)
count = 20
term = terminalio.Terminal(termgrid, terminalio.FONT)

def world_seed(n):
    """For entertainment purposes only."""
    letters = "AEIOUMRFCV"
    word = [random.choice(letters) for _ in range(n)]
    return "".join(word)

term.write(f"Terminal {COLS}x{ROWS}.\r\n")
term.write(f"{COLS*w}x{ROWS*h} pixels.\r\n")
term.write(f"VT100 protocol.\r\n")
term.write(f"Both carriage return and line feed are required.\r\n")
while True:
    term.write(f"Your world seed is:\r\n")
    for _ in range(10):
        term.write(world_seed(12)+" ")
    term.write("\r\n")
    time.sleep(10)