## # @filename : epd2in13.py # @brief : Implements for e-paper library # @author : Yehui from Waveshare # # Copyright (C) Waveshare September 9 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 = 122 EPD_HEIGHT = 250 # EPD2IN13 commands DRIVER_OUTPUT_CONTROL = 0x01 BOOSTER_SOFT_START_CONTROL = 0x0C GATE_SCAN_START_POSITION = 0x0F DEEP_SLEEP_MODE = 0x10 DATA_ENTRY_MODE_SETTING = 0x11 SW_RESET = 0x12 TEMPERATURE_SENSOR_CONTROL = 0x1A MASTER_ACTIVATION = 0x20 DISPLAY_UPDATE_CONTROL_1 = 0x21 DISPLAY_UPDATE_CONTROL_2 = 0x22 WRITE_RAM = 0x24 WRITE_VCOM_REGISTER = 0x2C WRITE_LUT_REGISTER = 0x32 SET_DUMMY_LINE_PERIOD = 0x3A SET_GATE_TIME = 0x3B BORDER_WAVEFORM_CONTROL = 0x3C SET_RAM_X_ADDRESS_START_END_POSITION = 0x44 SET_RAM_Y_ADDRESS_START_END_POSITION = 0x45 SET_RAM_X_ADDRESS_COUNTER = 0x4E SET_RAM_Y_ADDRESS_COUNTER = 0x4F TERMINATE_FRAME_READ_WRITE = 0xFF 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 self.lut = self.lut_full_update lut_full_update = [ 0x22, 0x55, 0xAA, 0x55, 0xAA, 0x55, 0xAA, 0x11, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1E, 0x1E, 0x1E, 0x1E, 0x1E, 0x1E, 0x1E, 0x1E, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00 ] lut_partial_update = [ 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0F, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 ] 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, lut): if (epdif.epd_init() != 0): return -1 # EPD hardware init start self.lut = lut self.reset() self.send_command(DRIVER_OUTPUT_CONTROL) self.send_data((EPD_HEIGHT - 1) & 0xFF) self.send_data(((EPD_HEIGHT - 1) >> 8) & 0xFF) self.send_data(0x00) # GD = 0 SM = 0 TB = 0 self.send_command(BOOSTER_SOFT_START_CONTROL) self.send_data(0xD7) self.send_data(0xD6) self.send_data(0x9D) self.send_command(WRITE_VCOM_REGISTER) self.send_data(0xA8) # VCOM 7C self.send_command(SET_DUMMY_LINE_PERIOD) self.send_data(0x1A) # 4 dummy lines per gate self.send_command(SET_GATE_TIME) self.send_data(0x08) # 2us per line self.send_command(DATA_ENTRY_MODE_SETTING) self.send_data(0x03) # X increment Y increment self.set_lut(self.lut) # EPD hardware init end return 0 def wait_until_idle(self): while(self.digital_read(self.busy_pin) == 1): # 0: idle, 1: busy self.delay_ms(100) ## # @brief: module reset. # often used to awaken the module in deep sleep, ## 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) ## # @brief: set the look-up table register ## def set_lut(self, lut): self.lut = lut self.send_command(WRITE_LUT_REGISTER) # the length of look-up table is 30 bytes for i in range(0, len(lut)): self.send_data(self.lut[i]) ## # @brief: convert an image to a buffer ## def get_frame_buffer(self, image): buf = [0x00] * (self.width * self.height / 8) # Set buffer to value of Python Imaging Library image. # Image must be in mode 1. image_monocolor = image.convert('1') imwidth, imheight = image_monocolor.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_monocolor.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] != 0: buf[(x + y * self.width) / 8] |= 0x80 >> (x % 8) return buf ## # @brief: put an image to the frame memory. # this won't update the display. ## def set_frame_memory(self, image, x, y): if (image == None or x < 0 or y < 0): return image_monocolor = image.convert('1') image_width, image_height = image_monocolor.size # x point must be the multiple of 8 or the last 3 bits will be ignored x = x & 0xF8 image_width = image_width & 0xF8 if (x + image_width >= self.width): x_end = self.width - 1 else: x_end = x + image_width - 1 if (y + image_height >= self.height): y_end = self.height - 1 else: y_end = y + image_height - 1 self.set_memory_area(x, y, x_end, y_end) # send the image data pixels = image_monocolor.load() byte_to_send = 0x00 for j in range(y, y_end + 1): self.set_memory_pointer(x, j) self.send_command(WRITE_RAM) # 1 byte = 8 pixels, steps of i = 8 for i in range(x, x_end + 1): # Set the bits for the column of pixels at the current position. if pixels[i - x, j - y] != 0: byte_to_send |= 0x80 >> (i % 8) if (i % 8 == 7): self.send_data(byte_to_send) byte_to_send = 0x00 ## # @brief: clear the frame memory with the specified color. # this won't update the display. ## 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.send_command(WRITE_RAM) # send the color data for i in range(0, self.width / 8 * self.height): self.send_data(color) ## # @brief: update the display # there are 2 memory areas embedded in the e-paper display # but once this function is called, # the the next action of SetFrameMemory or ClearFrame will # set the other memory area. ## def display_frame(self): self.send_command(DISPLAY_UPDATE_CONTROL_2) self.send_data(0xC4) self.send_command(MASTER_ACTIVATION) self.send_command(TERMINATE_FRAME_READ_WRITE) self.wait_until_idle() ## # @brief: specify the memory area for data R/W ## def set_memory_area(self, x_start, y_start, x_end, y_end): self.send_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.send_data((x_start >> 3) & 0xFF) self.send_data((x_end >> 3) & 0xFF) self.send_command(SET_RAM_Y_ADDRESS_START_END_POSITION) self.send_data(y_start & 0xFF) self.send_data((y_start >> 8) & 0xFF) self.send_data(y_end & 0xFF) self.send_data((y_end >> 8) & 0xFF) ## # @brief: specify the start point for data R/W ## def set_memory_pointer(self, x, y): self.send_command(SET_RAM_X_ADDRESS_COUNTER) # x point must be the multiple of 8 or the last 3 bits will be ignored self.send_data((x >> 3) & 0xFF) self.send_command(SET_RAM_Y_ADDRESS_COUNTER) self.send_data(y & 0xFF) self.send_data((y >> 8) & 0xFF) self.wait_until_idle() ## # @brief: After this command is transmitted, the chip would enter the # deep-sleep mode to save power. # The deep sleep mode would return to standby by hardware reset. # You can use reset() to awaken or init() to initialize ## def sleep(self): self.send_command(DEEP_SLEEP_MODE) self.wait_until_idle() ### END OF FILE ###