# ***************************************************************************** # * | File : Pico_ePaper-3.7.py # * | Author : Waveshare team # * | Function : Electronic paper driver # * | Info : # *---------------- # * | This version: V1.0 # * | Date : 2021-06-01 # # | Info : python demo # ----------------------------------------------------------------------------- # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documnetation 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 # furished 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 OR 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 machine import Pin, SPI import framebuf import utime # Display resolution EPD_WIDTH = 400 EPD_HEIGHT = 300 SCK_PIN = 10 DIN_PIN = 11 RST_PIN = 12 DC_PIN = 8 CS_PIN = 9 BUSY_PIN = 13 class EPD_4in2_B: def __init__(self): self.reset_pin = Pin(RST_PIN, Pin.OUT) self.busy_pin = Pin(BUSY_PIN, Pin.IN, Pin.PULL_UP) self.cs_pin = Pin(CS_PIN, Pin.OUT) self.sck_pin = 1 self.din_pin = 1 self.width = EPD_WIDTH self.height = EPD_HEIGHT self.flag = 0 self.spi = SPI(1,baudrate=4000_000,sck=Pin(SCK_PIN),mosi=Pin(DIN_PIN)) # self.spi.init(baudrate=4000_000) self.dc_pin = Pin(DC_PIN, Pin.OUT) self.buffer_black = bytearray(self.height * self.width // 8) self.buffer_red = bytearray(self.height * self.width // 8) self.imageblack = framebuf.FrameBuffer(self.buffer_black, self.width, self.height, framebuf.MONO_HLSB) self.imagered = framebuf.FrameBuffer(self.buffer_red, self.width, self.height, framebuf.MONO_HLSB) self.EPD_4IN2B_Init() self.EPD_4IN2B_Clear() utime.sleep_ms(500) def digital_write(self, pin, value): pin.value(value) def digital_read(self, pin): return pin.value() def delay_ms(self, delaytime): utime.sleep(delaytime / 1000.0) def spi_writebyte(self, data): self.spi.write(bytearray(data)) def module_exit(self): self.digital_write(self.reset_pin, 0) def gpio_init(self): self.spi.deinit() def spi_init(self): self.spi = SPI(1,baudrate=4000_000,sck=Pin(SCK_PIN),mosi=Pin(DIN_PIN)) self.dc_pin = Pin(DC_PIN, Pin.OUT) # Hardware reset def reset(self): self.digital_write(self.reset_pin, 1) self.delay_ms(200) self.digital_write(self.reset_pin, 0) self.delay_ms(2) self.digital_write(self.reset_pin, 1) self.delay_ms(200) def send_command(self, command): self.digital_write(self.dc_pin, 0) self.digital_write(self.cs_pin, 0) self.spi_writebyte([command]) self.digital_write(self.cs_pin, 1) def send_data(self, data): self.digital_write(self.dc_pin, 1) self.digital_write(self.cs_pin, 0) self.spi_writebyte([data]) self.digital_write(self.cs_pin, 1) def send_data1(self, buf): self.digital_write(self.dc_pin, 1) self.digital_write(self.cs_pin, 0) self.spi.write(bytearray(buf)) self.digital_write(self.cs_pin, 1) def send_read(self): j = 0x00 self.sck_pin = Pin(SCK_PIN, Pin.OUT) self.din_pin = Pin(DIN_PIN, Pin.IN, Pin.PULL_UP) self.digital_write(self.dc_pin, 1) self.digital_write(self.cs_pin, 0) for i in range(0, 8): self.digital_write(self.sck_pin, 0) j = j << 1 if(self.digital_read(self.din_pin) == 1): j = j | 0x01 else: j = j & 0xfe self.digital_write(self.sck_pin, 1) self.digital_write(self.cs_pin, 1) return j def ReadBusy(self): print("e-Paper busy") if(self.flag == 1): while(self.digital_read(self.busy_pin) == 1): self.delay_ms(100) else: while(self.digital_read(self.busy_pin) == 0): self.delay_ms(100) print("e-Paper busy release") def TurnOnDisplay(self): if(self.flag == 1): self.send_command(0x22) self.send_data(0xF7) self.send_command(0x20) self.ReadBusy() else: self.send_command(0x12) self.delay_ms(100) self.ReadBusy() def EPD_4IN2B_Init(self): i = 0x00 self.reset() self.send_command(0x2F) self.delay_ms(100) self.gpio_init() i = self.send_read() print(i) self.spi_init() if(i == 0x01): self.flag = 1 self.ReadBusy() self.send_command(0x12) self.ReadBusy() self.send_command(0x3C) self.send_data(0x05) self.send_command(0x18) self.send_data(0x80) self.send_command(0x11) self.send_data(0x03) self.send_command(0x44) self.send_data(0x00) self.send_data(self.width//8-1) self.send_command(0x45) self.send_data(0x00) self.send_data(0x00) self.send_data((self.height-1)%256) self.send_data((self.height-1)//256) self.send_command(0x4E) self.send_data(0x00) self.send_command(0x4F) self.send_data(0x00) self.send_data(0x00) self.ReadBusy() else: self.flag = 0 self.send_command(0x04) # POWER_ON self.ReadBusy() self.send_command(0x00) # panel setting self.send_data(0x0f) def EPD_4IN2B_Clear(self): high = self.height if( self.width % 8 == 0) : wide = self.width // 8 else : wide = self.width // 8 + 1 if(self.flag == 1): self.send_command(0x24) self.send_data1([0xff] * high * wide) self.send_command(0x26) self.send_data1([0x00] * high * wide) else: self.send_command(0x10) self.send_data1([0xff] * high * wide) self.send_command(0x13) self.send_data1([0x00] * high * wide) self.TurnOnDisplay() def EPD_4IN2B_Display(self,blackImage,redImage): high = self.height if( self.width % 8 == 0) : wide = self.width // 8 else : wide = self.width // 8 + 1 if(self.flag == 1): self.send_command(0x24) self.send_data1(blackImage) self.send_command(0x26) for j in range(0, high): for i in range(0, wide): self.send_data(~redImage[i + j * wide]) else: self.send_command(0x10) self.send_data1(blackImage) self.send_command(0x13) for j in range(0, high): for i in range(0, wide): self.send_data(~redImage[i + j * wide]) self.TurnOnDisplay() def Sleep(self): if(self.flag == 1): self.send_command(0X10) self.send_data(0x03) else: self.send_command(0X50) self.send_data(0xf7) self.send_command(0X02) self.ReadBusy() self.send_command(0X07) self.send_data(0xA5) if __name__=='__main__': epd = EPD_4in2_B() epd.imageblack.fill(0xff) epd.imagered.fill(0xff) epd.imageblack.text("Waveshare", 5, 10, 0x00) epd.imagered.text("Pico_ePaper-4.2-B", 5, 40, 0x00) epd.imageblack.text("Raspberry Pico", 5, 70, 0x00) epd.EPD_4IN2B_Display(epd.buffer_black,epd.buffer_red) epd.delay_ms(5000) epd.imageblack.vline(10, 90, 60, 0x00) epd.imagered.vline(90, 90, 60, 0x00) epd.imageblack.hline(10, 90, 80, 0x00) epd.imagered.hline(10, 150, 80, 0x00) epd.imageblack.line(10, 90, 90, 150, 0x00) epd.imagered.line(90, 90, 10, 150, 0x00) epd.EPD_4IN2B_Display(epd.buffer_black,epd.buffer_red) epd.delay_ms(5000) epd.imageblack.rect(10, 180, 50, 80, 0x00) epd.imagered.fill_rect(70, 180, 50, 80, 0x00) epd.EPD_4IN2B_Display(epd.buffer_black,epd.buffer_red) epd.delay_ms(5000) epd.EPD_4IN2B_Clear() epd.Sleep()