nemunaire/waveshareteam-e-Paper
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Performance improvements using the 5.65" 7 color E Ink display.

Browse source 
1. As many others have done, switch to using SPI writebytes2() to send pixel data in bulk.  This makes a significant difference on a Raspberry Pi Zero W.
2. Use PIL (Pillow) to convert the image into the correct 4-bit color using a custom palette.  This dramatically speeds up conversion of the image, with the benefit of allow any kind of input image.  PIL will dither quantize/dither the colors as needed.
3. Minor formatting changes to add/remove whitespace
This commit is contained in:
Ryan Ziolko 2021-03-09 15:19:43 -06:00
commit 4fb55dbb71
1 changed files with 52 additions and 87 deletions
Download patch file Download diff file Expand all files Collapse all files

139
RaspberryPi_JetsonNano/python/lib/waveshare_epd/epd5in65f.py
View file

@ -32,6 +32,10 @@
import logging
from . import epdconfig
import PIL
from PIL import Image
import io
# Display resolution
EPD_WIDTH = 600
EPD_HEIGHT = 448
@ -51,12 +55,12 @@ class EPD:
self.RED = 0x0000ff # 0100
self.YELLOW = 0x00ffff # 0101
self.ORANGE = 0x0080ff # 0110
# Hardware reset
def reset(self):
epdconfig.digital_write(self.reset_pin, 1)
epdconfig.delay_ms(600)
epdconfig.delay_ms(600)
epdconfig.digital_write(self.reset_pin, 0)
epdconfig.delay_ms(2)
epdconfig.digital_write(self.reset_pin, 1)
@ -73,25 +77,31 @@ class EPD:
epdconfig.digital_write(self.cs_pin, 0)
epdconfig.spi_writebyte([data])
epdconfig.digital_write(self.cs_pin, 1)
def send_data_bulk(self, data):
epdconfig.digital_write(self.dc_pin, 1)
epdconfig.digital_write(self.cs_pin, 0)
epdconfig.spi_writebyte2(data)
epdconfig.digital_write(self.cs_pin, 1)
def ReadBusyHigh(self):
logging.debug("e-Paper busy")
while(epdconfig.digital_read(self.busy_pin) == 0): # 0: idle, 1: busy
epdconfig.delay_ms(100)
epdconfig.delay_ms(100)
logging.debug("e-Paper busy release")
def ReadBusyLow(self):
logging.debug("e-Paper busy")
while(epdconfig.digital_read(self.busy_pin) == 1): # 0: idle, 1: busy
epdconfig.delay_ms(100)
epdconfig.delay_ms(100)
logging.debug("e-Paper busy release")
def init(self):
if (epdconfig.module_init() != 0):
return -1
# EPD hardware init start
self.reset()
self.ReadBusyHigh()
self.send_command(0x00)
self.send_data(0xEF)
@ -122,7 +132,7 @@ class EPD:
self.send_data(0xC0)
self.send_command(0xE3)
self.send_data(0xAA)
epdconfig.delay_ms(100)
self.send_command(0x50)
self.send_data(0x37)
@ -130,102 +140,58 @@ class EPD:
return 0
def getbuffer(self, image):
# Create a pallette with the 7 colors supported by the panel
pal_image= Image.new("P", (1,1))
pal_image.putpalette( (0,0,0, 255,255,255, 0,255,0, 0,0,255, 255,0,0, 255,255,0, 255,128,0) + (0,0,0)*249)
# Convert the soruce image to the 7 colors, dithering if needed
image_7color = image.convert("RGB").quantize(palette=pal_image)
buf_7color = bytearray(image_7color.tobytes('raw'))
# PIL does not support 4 bit color, so pack the 4 bits of color
# into a single byte to transfer to the panel
buf = [0x00] * int(self.width * self.height / 2)
image_monocolor = image.convert('RGB')#Picture mode conversion
imwidth, imheight = image_monocolor.size
pixels = image_monocolor.load()
logging.debug('imwidth = %d imheight = %d ',imwidth, imheight)
if(imwidth == self.width and imheight == self.height):
for y in range(imheight):
for x in range(imwidth):
# Set the bits for the column of pixels at the current position.
Add = int((x + y * self.width) / 2)
Color = 0;
if (pixels[x, y][0] == 0 and pixels[x, y][1] == 0 and pixels[x, y][2] == 0):
Color = 0
elif (pixels[x, y][0] == 255 and pixels[x, y][1] == 255 and pixels[x, y][2] == 255):
Color = 1
elif (pixels[x, y][0] == 0 and pixels[x, y][1] == 255 and pixels[x, y][2] == 0):
Color = 2
elif (pixels[x, y][0] == 0 and pixels[x, y][1] == 0 and pixels[x, y][2] == 255):
Color = 3
elif (pixels[x, y][0] == 255 and pixels[x, y][1] == 0 and pixels[x, y][2] == 0):
Color = 4
elif (pixels[x, y][0] == 255 and pixels[x, y][1] == 255 and pixels[x, y][2] == 0):
Color = 5
elif (pixels[x, y][0] == 255 and pixels[x, y][1] == 128 and pixels[x, y][2] == 0):
Color = 6
data_t = buf[Add]&(~(0xF0 >> ((x % 2)*4)))
buf[Add] = data_t | ((Color << 4) >> ((x % 2)*4));
elif(imwidth == self.height and imheight == self.width):
for y in range(imheight):
for x in range(imwidth):
newx = y
newy = self.height - x - 1
Add = int((newx + newy*self.width) / 2)
Color = 0;
if (pixels[x, y][0] == 0 and pixels[x, y][1] == 0 and pixels[x, y][2] == 0):
Color = 0
elif (pixels[x, y][0] == 255 and pixels[x, y][1] == 255 and pixels[x, y][2] == 255):
Color = 1
elif (pixels[x, y][0] == 0 and pixels[x, y][1] == 255 and pixels[x, y][2] == 0):
Color = 2
elif (pixels[x, y][0] == 0 and pixels[x, y][1] == 0 and pixels[x, y][2] == 255):
Color = 3
elif (pixels[x, y][0] == 255 and pixels[x, y][1] == 0 and pixels[x, y][2] == 0):
Color = 4
elif (pixels[x, y][0] == 255 and pixels[x, y][1] == 255 and pixels[x, y][2] == 0):
Color = 5
elif (pixels[x, y][0] == 255 and pixels[x, y][1] == 128 and pixels[x, y][2] == 0):
Color = 6
data_t = buf[Add]&(~(0xF0 >> ((newx % 2)*4)))
buf[Add] = data_t | ((Color << 4) >> ((newx % 2)*4));
idx = 0
for i in range(0, len(buf_7color), 2):
buf[idx] = (buf_7color[i] << 4) + buf_7color[i+1]
idx += 1
return buf
def display(self,image):
self.send_command(0x61)#Set Resolution setting
self.send_command(0x61) #Set Resolution setting
self.send_data(0x02)
self.send_data(0x58)
self.send_data(0x01)
self.send_data(0xC0)
self.send_command(0x10)
for i in range(0, int(EPD_HEIGHT)):
for j in range(0, int(EPD_WIDTH/2)):
self.send_data((image[j+(int(EPD_WIDTH/2)*i)]))
self.send_command(0x04)#0x04
self.send_data_bulk(image)
self.send_command(0x04) #0x04
self.ReadBusyHigh()
self.send_command(0x12)#0x12
self.send_command(0x12) #0x12
self.ReadBusyHigh()
self.send_command(0x02) #0x02
self.send_command(0x02) #0x02
self.ReadBusyLow()
epdconfig.delay_ms(500)
def Clear(self):
self.send_command(0x61)#Set Resolution setting
self.send_command(0x61) #Set Resolution setting
self.send_data(0x02)
self.send_data(0x58)
self.send_data(0x01)
self.send_data(0xC0)
self.send_command(0x10)
for i in range(0, int(EPD_HEIGHT)):
for j in range(0, int(EPD_WIDTH/2)):
self.send_data(0x11)
#BLACK 0x00 /// 0000
#WHITE 0x11 /// 0001
#GREEN 0x22 /// 0010
#BLUE 0x33 /// 0011
#RED 0x44 /// 0100
#YELLOW 0x55 /// 0101
#ORANGE 0x66 /// 0110
#CLEAN 0x77 /// 0111 unavailable Afterimage
self.send_command(0x04)#0x04
# Set all pixels to white
buf = [0x11] * int(self.width * self.height / 2)
self.send_data_bulk(buf)
self.send_command(0x04) #0x04
self.ReadBusyHigh()
self.send_command(0x12)#0x12
self.send_command(0x12) #0x12
self.ReadBusyHigh()
self.send_command(0x02) #0x02
self.send_command(0x02) #0x02
self.ReadBusyLow()
epdconfig.delay_ms(500)
@ -236,5 +202,4 @@ class EPD:
epdconfig.digital_write(self.reset_pin, 0)
epdconfig.delay_ms(2000)
epdconfig.module_exit()
epdconfig.module_exit()