MicroPython实现ESP8266 控制电子墨水屏(SPI)

""" MicroPython Waveshare 1.54" Black/White GDEH0154D27 e-paper display driver https://github.com/mcauser/micropython-waveshare-epaper MIT License Copyright (c) 2017 Waveshare Copyright (c) 2018 Mike Causer Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. """ from micropython import const from time import sleep_ms import ustruct # Display resolution EPD_WIDTH = const(200) EPD_HEIGHT = const(200) # Display commands DRIVER_OUTPUT_CONTROL = const(0x01) BOOSTER_SOFT_START_CONTROL = const(0x0C) #GATE_SCAN_START_POSITION = const(0x0F) DEEP_SLEEP_MODE = const(0x10) DATA_ENTRY_MODE_SETTING = const(0x11) #SW_RESET = const(0x12) #TEMPERATURE_SENSOR_CONTROL = const(0x1A) MASTER_ACTIVATION = const(0x20) #DISPLAY_UPDATE_CONTROL_1 = const(0x21) DISPLAY_UPDATE_CONTROL_2 = const(0x22) WRITE_RAM = const(0x24) WRITE_VCOM_REGISTER = const(0x2C) WRITE_LUT_REGISTER = const(0x32) SET_DUMMY_LINE_PERIOD = const(0x3A) SET_GATE_TIME = const(0x3B) # not in datasheet #BORDER_WAVEFORM_CONTROL = const(0x3C) SET_RAM_X_ADDRESS_START_END_POSITION = const(0x44) SET_RAM_Y_ADDRESS_START_END_POSITION = const(0x45) SET_RAM_X_ADDRESS_COUNTER = const(0x4E) SET_RAM_Y_ADDRESS_COUNTER = const(0x4F) TERMINATE_FRAME_READ_WRITE = const(0xFF) # aka NOOP BUSY = const(1) # 1=busy, 0=idle class EPD: def __init__(self, spi, cs, dc, rst, busy): self.spi = spi self.cs = cs self.dc = dc self.rst = rst self.busy = busy self.cs.init(self.cs.OUT, value=1) self.dc.init(self.dc.OUT, value=0) self.rst.init(self.rst.OUT, value=0) self.busy.init(self.busy.IN) self.width = EPD_WIDTH self.height = EPD_HEIGHT LUT_FULL_UPDATE = bytearray(b'\x02\x02\x01\x11\x12\x12\x22\x22\x66\x69\x69\x59\x58\x99\x99\x88\x00\x00\x00\x00\xF8\xB4\x13\x51\x35\x51\x51\x19\x01\x00') LUT_PARTIAL_UPDATE = bytearray(b'\x10\x18\x18\x08\x18\x18\x08\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x13\x14\x44\x12\x00\x00\x00\x00\x00\x00') def _command(self, command, data=None): self.dc(0) self.cs(0) self.spi.write(bytearray([command])) self.cs(1) if data is not None: self._data(data) def _data(self, data): self.dc(1) self.cs(0) self.spi.write(data) self.cs(1) def init(self): self.reset() self._command(DRIVER_OUTPUT_CONTROL) self._data(bytearray([(EPD_HEIGHT - 1) & 0xFF])) self._data(bytearray([((EPD_HEIGHT - 1) >> 8) & 0xFF])) self._data(bytearray([0x00])) # GD = 0 SM = 0 TB = 0 self._command(BOOSTER_SOFT_START_CONTROL, b'\xD7\xD6\x9D') self._command(WRITE_VCOM_REGISTER, b'\xA8') # VCOM 7C self._command(SET_DUMMY_LINE_PERIOD, b'\x1A') # 4 dummy lines per gate self._command(SET_GATE_TIME, b'\x08') # 2us per line self._command(DATA_ENTRY_MODE_SETTING, b'\x03') # X increment Y increment self.set_lut(self.LUT_FULL_UPDATE) def wait_until_idle(self): while self.busy.value() == BUSY: sleep_ms(100) def reset(self): self.rst(0) sleep_ms(200) self.rst(1) sleep_ms(200) def set_lut(self, lut): self._command(WRITE_LUT_REGISTER, lut) # put an image in the frame memory def set_frame_memory(self, image, x, y, w, h): # x point must be the multiple of 8 or the last 3 bits will be ignored x = x & 0xF8 w = w & 0xF8 if (x + w >= self.width): x_end = self.width - 1 else: x_end = x + w - 1 if (y + h >= self.height): y_end = self.height - 1 else: y_end = y + h - 1 self.set_memory_area(x, y, x_end, y_end) self.set_memory_pointer(x, y) self._command(WRITE_RAM, image) # replace the frame memory with the specified color def clear_frame_memory(self, color): self.set_memory_area(0, 0, self.width - 1, self.height - 1) self.set_memory_pointer(0, 0) self._command(WRITE_RAM) # send the color data for i in range(0, self.width // 8 * self.height): self._data(bytearray([color])) # draw the current frame memory and switch to the next memory area def display_frame(self): self._command(DISPLAY_UPDATE_CONTROL_2, b'\xC4') self._command(MASTER_ACTIVATION) self._command(TERMINATE_FRAME_READ_WRITE) self.wait_until_idle() # specify the memory area for data R/W def set_memory_area(self, x_start, y_start, x_end, y_end): self._command(SET_RAM_X_ADDRESS_START_END_POSITION) # x point must be the multiple of 8 or the last 3 bits will be ignored self._data(bytearray([(x_start >> 3) & 0xFF])) self._data(bytearray([(x_end >> 3) & 0xFF])) self._command(SET_RAM_Y_ADDRESS_START_END_POSITION, ustruct.pack("<HH", y_start, y_end)) # specify the start point for data R/W def set_memory_pointer(self, x, y): self._command(SET_RAM_X_ADDRESS_COUNTER) # x point must be the multiple of 8 or the last 3 bits will be ignored self._data(bytearray([(x >> 3) & 0xFF])) self._command(SET_RAM_Y_ADDRESS_COUNTER, ustruct.pack("<H", y)) self.wait_until_idle() # to wake call reset() or init() def sleep(self): self._command(DEEP_SLEEP_MODE, b'\x01') # enter deep sleep A0=1, A0=0 power on self.wait_until_idle()