from DisplayAdapter import DisplayAdapter import spidev import RPi.GPIO as GPIO import time from PIL import Image RST_PIN = 17 DC_PIN = 25 CS_PIN = 8 BUSY_PIN = 24 # Commands PANEL_SETTING = 0x00 POWER_SETTING = 0x01 POWER_OFF = 0x02 POWER_OFF_SEQUENCE_SETTING = 0x03 POWER_ON = 0x04 POWER_ON_MEASURE = 0x05 BOOSTER_SOFT_START = 0x06 DEEP_SLEEP = 0x07 DATA_START_TRANSMISSION_1 = 0x10 DATA_STOP = 0x11 DISPLAY_REFRESH = 0x12 IMAGE_PROCESS = 0x13 LUT_FOR_VCOM = 0x20 LUT_BLUE = 0x21 LUT_WHITE = 0x22 LUT_GRAY_1 = 0x23 LUT_GRAY_2 = 0x24 LUT_RED_0 = 0x25 LUT_RED_1 = 0x26 LUT_RED_2 = 0x27 LUT_RED_3 = 0x28 LUT_XON = 0x29 PLL_CONTROL = 0x30 TEMPERATURE_SENSOR_COMMAND = 0x40 TEMPERATURE_CALIBRATION = 0x41 TEMPERATURE_SENSOR_WRITE = 0x42 TEMPERATURE_SENSOR_READ = 0x43 VCOM_AND_DATA_INTERVAL_SETTING = 0x50 LOW_POWER_DETECTION = 0x51 TCON_SETTING = 0x60 TCON_RESOLUTION = 0x61 SPI_FLASH_CONTROL = 0x65 REVISION = 0x70 GET_STATUS = 0x71 AUTO_MEASUREMENT_VCOM = 0x80 READ_VCOM_VALUE = 0x81 VCM_DC_SETTING = 0x82 class EpdAdapter (DisplayAdapter): """Generalized adapter for epd7in5 and epd7in5b""" def __init__ (self, width, height): super(EpdAdapter, self).__init__(width, height) self.reset_pin = RST_PIN self.dc_pin = DC_PIN self.busy_pin = BUSY_PIN self.epd_init() def display_frame (self, frame_buffer): raise NotImplementedError("Functions needs to be implemented") def get_frame_buffer (self, image): raise NotImplementedError("Functions needs to be implemented") def render (self, design): self.init_render() time.sleep(5) print('Converting image to data and sending it to the display') print('This may take a while...' + '\n') prepared_image = design.get_image().rotate(270, expand=1) self.display_frame(self.get_frame_buffer(prepared_image)) # Powering off the E-Paper until the next loop self.sleep() print('Data sent successfully') print('Powering off the E-Paper until the next loop' + '\n') def init_render (self): if (self.epd_init() != 0): return -1 self.reset() self.send_command(POWER_SETTING) self.send_data(0x37) self.send_data(0x00) self.send_command(PANEL_SETTING) self.send_data(0xCF) self.send_data(0x08) self.send_command(BOOSTER_SOFT_START) self.send_data(0xc7) self.send_data(0xcc) self.send_data(0x28) self.send_command(POWER_ON) self.wait_until_idle() self.send_command(PLL_CONTROL) self.send_data(0x3c) self.send_command(TEMPERATURE_CALIBRATION) self.send_data(0x00) self.send_command(VCOM_AND_DATA_INTERVAL_SETTING) self.send_data(0x77) self.send_command(TCON_SETTING) self.send_data(0x22) self.send_command(TCON_RESOLUTION) self.send_data(0x02) #source 640 self.send_data(0x80) self.send_data(0x01) #gate 384 self.send_data(0x80) self.send_command(VCM_DC_SETTING) self.send_data(0x1E) #decide by LUT file self.send_command(0xe5) #FLASH MODE self.send_data(0x03) def digital_write (self, pin, value): GPIO.output(pin, value) def digital_read (self, pin): return GPIO.input(pin) def delay_ms (self, delaytime): time.sleep(delaytime / 1000.0) def spi_transfer (self, data): self.SPI.writebytes(data) def epd_init (self): # SPI device, bus = 0, device = 0 self.SPI = spidev.SpiDev(0, 0) #self.SPI.no_cs = True GPIO.setmode(GPIO.BCM) GPIO.setwarnings(False) GPIO.setup(RST_PIN, GPIO.OUT) GPIO.setup(DC_PIN, GPIO.OUT) GPIO.setup(CS_PIN, GPIO.OUT) GPIO.setup(BUSY_PIN, GPIO.IN) self.SPI.max_speed_hz = 2000000 self.SPI.mode = 0b00 return 0 def sleep (self): self.send_command(POWER_OFF) self.wait_until_idle() self.send_command(DEEP_SLEEP) self.send_data(0xa5) def wait_until_idle (self, max_wait_seconds = 60): wait_ms = 100 count = 0 while(self.digital_read(self.busy_pin) == 0 and wait_ms * count < max_wait_seconds * 1000): # 0: busy, 1: idle self.delay_ms(wait_ms) count += 1 if wait_ms * count >= max_wait_seconds * 1000: print("Skipped idle confirmation") def reset (self): self.digital_write(self.reset_pin, GPIO.LOW) # module reset self.delay_ms(200) self.digital_write(self.reset_pin, GPIO.HIGH) self.delay_ms(200) def send_command (self, command): self.digital_write(self.dc_pin, GPIO.LOW) # the parameter type is list but not int # so use [command] instead of command self.spi_transfer([ command ]) def send_data (self, data): self.digital_write(self.dc_pin, GPIO.HIGH) # the parameter type is list but not int # so use [data] instead of data self.spi_transfer([ data ])