kopia lustrzana https://github.com/peterhinch/micropython-nano-gui
105 wiersze
3.4 KiB
Python
105 wiersze
3.4 KiB
Python
# st7567s.py
|
|
|
|
# Released under the MIT License (MIT). See LICENSE.
|
|
|
|
# Driver contributed by Enrico Rossini @EnricoRoss98
|
|
# https://github.com/peterhinch/micropython-nano-gui/pull/57
|
|
|
|
from micropython import const
|
|
from gui.drivers.boolpalette import BoolPalette
|
|
from time import sleep_ms
|
|
import framebuf
|
|
|
|
# LCD Commands definition
|
|
_CMD_DISPLAY_ON = const(0xAF)
|
|
_CMD_DISPLAY_OFF = const(0xAE)
|
|
_CMD_SET_START_LINE = const(0x40)
|
|
_CMD_SET_PAGE = const(0xB0)
|
|
_CMD_COLUMN_UPPER = const(0x10)
|
|
_CMD_COLUMN_LOWER = const(0x00)
|
|
_CMD_SET_ADC_NORMAL = const(0xA0)
|
|
_CMD_SET_ADC_REVERSE = const(0xA1)
|
|
_CMD_SET_COL_NORMAL = const(0xC0)
|
|
_CMD_SET_COL_REVERSE = const(0xC8)
|
|
_CMD_SET_DISPLAY_NORMAL = const(0xA6)
|
|
_CMD_SET_DISPLAY_REVERSE = const(0xA7)
|
|
_CMD_SET_ALLPX_ON = const(0xA5)
|
|
_CMD_SET_ALLPX_NORMAL = const(0xA4)
|
|
_CMD_SET_BIAS_9 = const(0xA2)
|
|
_CMD_SET_BIAS_7 = const(0xA3)
|
|
_CMD_DISPLAY_RESET = const(0xE2)
|
|
_CMD_NOP = const(0xE3)
|
|
_CMD_TEST = const(0xF0) # Exit this mode with _CMD_NOP
|
|
_CMD_SET_POWER = const(0x28)
|
|
_CMD_SET_RESISTOR_RATIO = const(0x20)
|
|
_CMD_SET_VOLUME = const(0x81)
|
|
|
|
# Display parameters
|
|
_DISPLAY_W = const(128)
|
|
_DISPLAY_H = const(64)
|
|
_DISPLAY_CONTRAST = const(0x1B)
|
|
_DISPLAY_RESISTOR_RATIO = const(5)
|
|
_DISPLAY_POWER_MODE = 7
|
|
|
|
|
|
class ST7567(framebuf.FrameBuffer):
|
|
@staticmethod
|
|
def rgb(r, g, b):
|
|
return min((r + g + b) >> 7, 3) # Greyscale in range 0 <= gs <= 3
|
|
|
|
def __init__(self, width, height, i2c, addr=0x3F, external_vcc=False):
|
|
self.i2c = i2c
|
|
self.addr = addr
|
|
self.temp = bytearray(2)
|
|
self.write_list = [b"\x40", None] # Co=0, D/C#=1
|
|
self.width = width
|
|
self.height = height
|
|
self.external_vcc = external_vcc
|
|
self.pages = self.height // 8
|
|
self.buffer = bytearray(self.pages * self.width)
|
|
mode = framebuf.MONO_VLSB
|
|
self.palette = BoolPalette(mode) # Ensure color compatibility
|
|
super().__init__(self.buffer, self.width, self.height, framebuf.MONO_VLSB)
|
|
self.display_init()
|
|
|
|
def display_init(self):
|
|
self.write_cmd(_CMD_DISPLAY_RESET)
|
|
sleep_ms(1)
|
|
for cmd in (
|
|
_CMD_DISPLAY_OFF, # Display off
|
|
_CMD_SET_BIAS_9, # Display drive voltage 1/9 bias
|
|
_CMD_SET_ADC_NORMAL, # Normal SEG
|
|
_CMD_SET_COL_REVERSE, # Commmon mode reverse direction
|
|
_CMD_SET_RESISTOR_RATIO + _DISPLAY_RESISTOR_RATIO, # V5 R ratio
|
|
_CMD_SET_VOLUME, # Contrast
|
|
_DISPLAY_CONTRAST, # Contrast value
|
|
_CMD_SET_POWER + _DISPLAY_POWER_MODE):
|
|
self.write_cmd(cmd)
|
|
|
|
self.show()
|
|
self.write_cmd(_CMD_DISPLAY_ON)
|
|
|
|
def set_contrast(self, value):
|
|
if (0x1 <= value <= 0x3f):
|
|
for cmd in (_CMD_SET_VOLUME, value):
|
|
self.write_cmd(cmd)
|
|
|
|
def show(self):
|
|
for i in range(8):
|
|
for cmd in (
|
|
_CMD_SET_START_LINE,
|
|
_CMD_SET_PAGE + i,
|
|
_CMD_COLUMN_UPPER,
|
|
_CMD_COLUMN_LOWER):
|
|
self.write_cmd(cmd)
|
|
self.write_data(self.buffer[i * 128:(i + 1) * 128])
|
|
|
|
def write_cmd(self, cmd):
|
|
self.temp[0] = 0x80 # Co=1, D/C#=0
|
|
self.temp[1] = cmd
|
|
self.i2c.writeto(self.addr, self.temp)
|
|
|
|
def write_data(self, buf):
|
|
self.write_list[1] = buf
|
|
self.i2c.writevto(self.addr, self.write_list)
|