## # @filename : epd7in5.py # @brief : Implements for Dual-color e-paper library # @author : Yehui from Waveshare # # Copyright (C) Waveshare July 10 2017 # # 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. # import epdif from PIL import Image import RPi.GPIO as GPIO # Display resolution EPD_WIDTH = 640 EPD_HEIGHT = 384 # EPD7IN5 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 #was 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 #was 0x82 class EPD: def __init__(self): self.reset_pin = epdif.RST_PIN self.dc_pin = epdif.DC_PIN self.busy_pin = epdif.BUSY_PIN self.width = EPD_WIDTH self.height = EPD_HEIGHT def digital_write(self, pin, value): epdif.epd_digital_write(pin, value) def digital_read(self, pin): return epdif.epd_digital_read(pin) def delay_ms(self, delaytime): epdif.epd_delay_ms(delaytime) 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 epdif.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 epdif.spi_transfer([data]) def init(self): if (epdif.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 wait_until_idle(self): while(self.digital_read(self.busy_pin) == 0): # 0: busy, 1: idle self.delay_ms(100) 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 get_frame_buffer(self, image): buf = [0x00] * int(self.width * self.height / 4) # Set buffer to value of Python Imaging Library image. # Image must be in mode L. image_grayscale = image.convert('L') imwidth, imheight = image_grayscale.size if imwidth != self.width or imheight != self.height: raise ValueError('Image must be same dimensions as display \ ({0}x{1}).' .format(self.width, self.height)) pixels = image_grayscale.load() for y in range(self.height): for x in range(self.width): # Set the bits for the column of pixels at the current position. if pixels[x, y] < 64: # black buf[int((x + y * self.width) / 4)] &= ~(0xC0 >> (x % 4 * 2)) elif pixels[x, y] < 192: # convert gray to red buf[int((x + y * self.width) / 4)] &= ~(0xC0 >> (x % 4 * 2)) buf[int((x + y * self.width) / 4)] |= 0x40 >> (x % 4 * 2) else: # white buf[int((x + y * self.width) / 4)] |= 0xC0 >> (x % 4 * 2) return buf #due to python2 -> python3, int had to be added in 'get_frame #_buffer def display_frame(self, frame_buffer): self.send_command(DATA_START_TRANSMISSION_1) for i in range(0, int(self.width / 4 * self.height)): #the above line had to be modified due to python2 -> python3 #the issue lies in division, which returns integers in python2 #but floats in python3 temp1 = frame_buffer[i] j = 0 while (j < 4): if ((temp1 & 0xC0) == 0xC0): temp2 = 0x03 elif ((temp1 & 0xC0) == 0x00): temp2 = 0x00 else: temp2 = 0x04 temp2 = (temp2 << 4) & 0xFF temp1 = (temp1 << 2) & 0xFF j += 1 if((temp1 & 0xC0) == 0xC0): temp2 |= 0x03 elif ((temp1 & 0xC0) == 0x00): temp2 |= 0x00 else: temp2 |= 0x04 temp1 = (temp1 << 2) & 0xFF self.send_data(temp2) j += 1 self.send_command(DISPLAY_REFRESH) self.delay_ms(100) self.wait_until_idle() def sleep(self): self.send_command(POWER_OFF) self.wait_until_idle() self.send_command(DEEP_SLEEP) self.send_data(0xa5) ### END OF FILE ###