184 lines
7.1 KiB
Python
184 lines
7.1 KiB
Python
|
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
|
||
|
|
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 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', dither=None)
|
||
|
|
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] < 75: #was 64 # black
|
||
|
|
buf[int((x + y * self.width) / 4)] &= ~(0xC0 >> (x % 4 * 2))
|
||
|
|
elif pixels[x, y] < 110: #was 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 ###
|
||
|
|
|