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@pklazy

pklazy/m5stickc_lcd.py

Last active Mar 30, 2021
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Micropython M5StickC LCD Driver
import framebuf
import time
from machine import Pin, SPI, I2C
'''
import m5stickc_lcd
lcd = m5stickc_lcd.ST7735()
lcd.text('hello', 10, 10, 0xffff)
lcd.show()
'''
class ST7735(framebuf.FrameBuffer):
def __init__(self):
self.baudrate = 27000000
self.cs = Pin(5, Pin.OUT, value=1)
self.dc = Pin(23, Pin.OUT, value=1)
self.rst = Pin(18, Pin.OUT, value=1)
self.spi = SPI(
1, baudrate=self.baudrate,
polarity=0, phase=0, bits=8, firstbit=SPI.MSB,
sck=Pin(13), mosi=Pin(15))
self.enable_lcd_power()
self.rst.on()
time.sleep_ms(5)
self.rst.off()
time.sleep_ms(20)
self.rst.on()
time.sleep_ms(150)
self.width = 80
self.height = 160
self.buffer = bytearray(self.width * self.height * 2)
super().__init__(self.buffer, self.width, self.height, framebuf.RGB565)
self.init_display()
def enable_lcd_power(self):
i2c = I2C(1, scl=Pin(22), sda=Pin(21), freq=100000)
i2c.writeto_mem(0x34, 0x28, b'\xff')
axp192_reg12 = i2c.readfrom_mem(0x34, 0x12, 1)[0]
axp192_reg12 |= 0x0c
i2c.writeto_mem(0x34, 0x12, bytes([axp192_reg12]))
def init_display(self):
for cmd, data, delay in [
(0x01, None, 150),
(0x11, None, 500),
(0xb1, b'\x01\x2c\x2d', None),
(0xb2, b'\x01\x2c\x2d', None),
(0xb3, b'\x01\x2c\x2d\x01\x2c\x2d', None),
(0xb4, b'\x07', None),
(0xc0, b'\xa2\x02\x84', None),
(0xc1, b'\xc5', None),
(0xc2, b'\x0a\x00', None),
(0xc3, b'\x8a\x2a', None),
(0xc4, b'\x8a\xee', None),
(0xc5, b'\x0e', None),
(0x20, None, None),
(0x36, b'\xc8', None),
(0x3a, b'\x05', None),
(0x2a, b'\x00\x02\x00\x81', None),
(0x2b, b'\x00\x01\x00\xa0', None),
(0x21, None, None),
(0xe0, b'\x02\x1c\x07\x12\x37\x32\x29\x2d\x29\x25\x2b\x39\x00\x01\x03\x10', None),
(0xe1, b'\x03\x1d\x07\x06\x2e\x2c\x29\x2d\x2e\x2e\x37\x3f\x00\x00\x02\x10', None),
(0x13, None, 10),
(0x29, None, 100),
(0x36, b'\xcc', 10),
]:
self.write_cmd(cmd)
if data:
self.write_data(data)
if delay:
time.sleep_ms(delay)
self.fill(0)
self.show()
def show(self):
self.write_cmd(0x2a)
self.write_data(b'\x00\x1a\x00\x69')
self.write_cmd(0x2b)
self.write_data(b'\x00\x01\x00\xa0')
self.write_cmd(0x2c)
self.write_data(self.buffer)
def write_cmd(self, cmd):
self.dc.off()
self.cs.off()
self.spi.write(bytes([cmd]))
self.cs.on()
def write_data(self, buf):
self.dc.on()
self.cs.off()
self.spi.write(buf)
self.cs.on()
@nexus166

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@nexus166 nexus166 commented Oct 1, 2020

hi there, could you provide hints on how to use this properly with print(), not having to reset the screen every time?

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