sb-py/python-test/lcd.py

# https://www.waveshare.com/wiki/Pico-LCD-1.3
# https://thepihut.com/blogs/raspberry-pi-tutorials/coding-graphics-with-micropython-on-raspberry-pi-pico-displays
# https://api.arcade.academy/en/latest/_modules/arcade/draw_commands.html#draw_arc_filled

from machine import Pin, SPI, PWM
from array import array
import framebuf
import time
import os
import math
import gc

class KeyCheck:
    def __init__(self, new, old):
        self.new = new
        self.old = old

    def once(self, k):
        return self.new[k] and not self.old[k]

class LCD(framebuf.FrameBuffer):
    def __init__(self):
        self.width = 240
        self.height = 240

        self.cs = Pin(9, Pin.OUT)
        self.rst = Pin(12, Pin.OUT)

        self.cs(1)

        #self.spi = SPI(1)
        #self.spi = SPI(1,   1_000_000)
        self.spi = SPI(1, 100_000_000, polarity=0, phase=0, sck=Pin(10), mosi=Pin(11), miso=None)

        self.dc = Pin(8, Pin.OUT)
        self.dc(1)

        gc.collect()
        self.buffer = bytearray(self.height * self.width * 2)

        super().__init__(self.buffer, self.width, self.height, framebuf.RGB565)
        self.init_display()

        self.red   = 0x07E0
        self.green = 0x001f
        self.blue  = 0xf800
        self.white = 0xffff
        self.black = 0x0000

        self.fill(self.black)
        self.show()

        self.pwm = PWM(Pin(13))
        self.pwm.freq(1000)
        self.brightness(0.0)

        self.keyA = Pin(15,Pin.IN,Pin.PULL_UP)
        self.keyB = Pin(17,Pin.IN,Pin.PULL_UP)
        self.keyX = Pin(19 ,Pin.IN,Pin.PULL_UP)
        self.keyY= Pin(21 ,Pin.IN,Pin.PULL_UP)

        self.up = Pin(2,Pin.IN,Pin.PULL_UP)
        self.down = Pin(18,Pin.IN,Pin.PULL_UP)
        self.left = Pin(16,Pin.IN,Pin.PULL_UP)
        self.right = Pin(20,Pin.IN,Pin.PULL_UP)
        self.ctrl = Pin(3,Pin.IN,Pin.PULL_UP)

        self.keys_old = {
            "a": False,
            "b": False,
            "x": False,
            "y": False,
            "up": False,
            "down": False,
            "left": False,
            "right": False,
            "enter": False,
        }

    def buttons(self):
        keys = {
            "a": self.keyA.value() == 0,
            "b": self.keyB.value() == 0,
            "x": self.keyX.value() == 0,
            "y": self.keyY.value() == 0,
            "up": self.up.value() == 0,
            "down": self.down.value() == 0,
            "left": self.left.value() == 0,
            "right": self.right.value() == 0,
            "enter": self.ctrl.value() == 0,
        }
        kc = KeyCheck(keys, self.keys_old)
        self.keys_old = keys.copy()
        return kc

    def brightness(self, v):
        self.pwm.duty_u16(int(v * 65535))

    def write_cmd(self, cmd):
        self.cs(1)
        self.dc(0)
        self.cs(0)
        self.spi.write(bytearray([cmd]))
        self.cs(1)

    def write_data(self, buf):
        self.cs(1)
        self.dc(1)
        self.cs(0)
        self.spi.write(bytearray([buf]))
        self.cs(1)

    def init_display(self):
        self.rst(1)
        self.rst(0)
        self.rst(1)
        self.write_cmd(0x36)
        self.write_data(0x70)
        self.write_cmd(0x3A)
        self.write_data(0x05)
        self.write_cmd(0xB2)
        self.write_data(0x0C)
        self.write_data(0x0C)
        self.write_data(0x00)
        self.write_data(0x33)
        self.write_data(0x33)
        self.write_cmd(0xB7)
        self.write_data(0x35)
        self.write_cmd(0xBB)
        self.write_data(0x19)
        self.write_cmd(0xC0)
        self.write_data(0x2C)
        self.write_cmd(0xC2)
        self.write_data(0x01)
        self.write_cmd(0xC3)
        self.write_data(0x12)
        self.write_cmd(0xC4)
        self.write_data(0x20)
        self.write_cmd(0xC6)
        self.write_data(0x0F)
        self.write_cmd(0xD0)
        self.write_data(0xA4)
        self.write_data(0xA1)
        self.write_cmd(0xE0)
        self.write_data(0xD0)
        self.write_data(0x04)
        self.write_data(0x0D)
        self.write_data(0x11)
        self.write_data(0x13)
        self.write_data(0x2B)
        self.write_data(0x3F)
        self.write_data(0x54)
        self.write_data(0x4C)
        self.write_data(0x18)
        self.write_data(0x0D)
        self.write_data(0x0B)
        self.write_data(0x1F)
        self.write_data(0x23)
        self.write_cmd(0xE1)
        self.write_data(0xD0)
        self.write_data(0x04)
        self.write_data(0x0C)
        self.write_data(0x11)
        self.write_data(0x13)
        self.write_data(0x2C)
        self.write_data(0x3F)
        self.write_data(0x44)
        self.write_data(0x51)
        self.write_data(0x2F)
        self.write_data(0x1F)
        self.write_data(0x1F)
        self.write_data(0x20)
        self.write_data(0x23)
        self.write_cmd(0x21)
        self.write_cmd(0x11)
        self.write_cmd(0x29)

    def show(self):
        self.write_cmd(0x2A)
        self.write_data(0x00)
        self.write_data(0x00)
        self.write_data(0x00)
        self.write_data(0xef)
        self.write_cmd(0x2B)
        self.write_data(0x00)
        self.write_data(0x00)
        self.write_data(0x00)
        self.write_data(0xEF)
        self.write_cmd(0x2C)
        self.cs(1)
        self.dc(1)
        self.cs(0)
        self.spi.write(self.buffer)
        self.cs(1)

    def circle(self, x, y, r, c):
        self.hline(x-r,y,r*2,c)
        for i in range(1,r):
            a = int(math.sqrt(r*r-i*i)) # Pythagoras!
            self.hline(x-a,y+i,a*2,c) # Lower half
            self.hline(x-a,y-i,a*2,c) # Upper half

    def ring(self, x, y, r, c):
        self.pixel(x-r,y,c)
        self.pixel(x+r,y,c)
        self.pixel(x,y-r,c)
        self.pixel(x,y+r,c)
        for i in range(1, r):
            a = int(math.sqrt(r*r-i*i))
            self.pixel(x-a,y-i,c)
            self.pixel(x+a,y-i,c)
            self.pixel(x-a,y+i,c)
            self.pixel(x+a,y+i,c)
            self.pixel(x-i,y-a,c)
            self.pixel(x+i,y-a,c)
            self.pixel(x-i,y+a,c)
            self.pixel(x+i,y+a,c)

    def arc(self, x_off, y_off, w, h, c,
                   start_angle, end_angle,
                   filled = True,
                   num_segments = 128):
        start_segment = int(start_angle / 360 * num_segments)
        end_segment = int(end_angle / 360 * num_segments)

        gc.collect()
        point_list = array('h')
        point_list.append(0)
        point_list.append(0)

        for segment in range(start_segment, end_segment + 1):
            theta = 2.0 * 3.1415926 * segment / num_segments
            x = w * math.cos(theta) / 2
            y = h * math.sin(theta) / 2

            i = (segment - start_segment + 1) * 2
            point_list.append(int(x))
            point_list.append(int(y))

        self.poly(int(x_off), int(y_off), point_list, c, True)

    def pie(self, x0, y0, w, c_border, c_circle, v):
        if v > 0.0:
            self.arc(int(x0), int(y0), int(w), int(w), c_circle, -90, int(v * 360) - 90)
        self.ring(int(x0), int(y0), int(w / 2), c_border)

    def textC(self, s, x, y, c):
        self.text(s, x - int(len(s) * 8 / 2), y - 5, c)