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    pyscan paper ink

    Scheduled Pinned Locked Moved Expansion Board
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    • G Offline
      gael cobert @robert-hh
      last edited by gael cobert

      @robert-hh

      ok this is the setup code

      rst = Pin('P11') --> ok ( white )
      dc = Pin('P10') --> ok ( green )
      busy = Pin('P15') --> ok ( lilac )
      cs = Pin('???') --> KO ( orange ) ?? connected to GND --> must i type Pin('GND')
      clk = Pin('P9') --> ok ( yellow )
      mosi = DIN = Pin('P15') --> blue cable

      spi = SPI(2, baudrate=20000000, polarity=0, phase=0, pins=(sck, mosi, None))
      1 Reply Last reply Reply Quote 0
      • robert-hhR Offline
        robert-hh @gael cobert
        last edited by

        @gael-cobert
        since you have connected the cs pin of the device to GND, you can skip it in your code. I recommended that to save port pins. It requires howerver to change the code.
        mosi is the pin for DIN of the display, used to send data to the display. So you have that connected to P19.
        The SPI signal which you do not need is miso, because no data is read back from the display.

        G 2 Replies Last reply Reply Quote 0
        • G Offline
          gael cobert @robert-hh
          last edited by

          ok thanks it seems ok so now i have this error :

          Traceback (most recent call last):
  File "main.py", line 76, in <module>
  File "/flash/lib/epaper7in5.py", line 135, in display_frame
IndexError: bytearray index out of range

          """
	Example for 4.2 inch black & white Waveshare E-ink screen
	Run on ESP32
"""

import epaper7in5
from machine import Pin, SPI

# SPIV on ESP32
 

rst = Pin('P11')
dc = Pin('P10')
busy = Pin('P15')
cs = Pin('P4')
clk = Pin('P9')
mosi = Pin('P15')


spi = SPI(0, mode=SPI.MASTER, baudrate=2000000, polarity=0, phase=0, pins=(clk, mosi, None))

e = epaper7in5.EPD(spi, cs, dc, rst, busy)
e.init()

w = 600
h = 384
x = 0
y = 0

# --------------------

# use a frame buffer
# 400 * 300 / 8 = 15000 - thats a lot of pixels
import framebuf
buf = bytearray(w * h // 8)
fb = framebuf.FrameBuffer(buf, w, h, framebuf.MONO_HLSB)
black = 0
white = 1
fb.fill(white)

# --------------------

# write hello world with black bg and white text
from image_dark import hello_world_dark
from image_light import hello_world_light
print('Image dark')
#bufImage = hello_world_dark
#fbImage = framebuf.FrameBuffer(bufImage, 128, 296, framebuf.MONO_HLSB)
#fb.blit(fbImage, 20, 2)
#bufImage = hello_world_light
#fbImage = framebuf.FrameBuffer(bufImage, 128, 296, framebuf.MONO_HLSB)
#fb.blit(fbImage, 168, 2)
#e.display_frame(buf)

# --------------------

# write hello world with white bg and black text
print('Image light')
#e.display_frame(hello_world_light)

# --------------------


print('Frame buffer things')
fb.fill(white)
fb.text('Hello World',30,0,black)
#fb.pixel(30, 10, black)
#fb.hline(30, 30, 10, black)
#fb.vline(30, 50, 10, black)
#fb.line(30, 70, 40, 80, black)
#fb.rect(30, 90, 10, 10, black)
#fb.fill_rect(30, 110, 10, 10, black)
#for row in range(0,36):
#	fb.text(str(row),0,row*8,black)
#fb.text('Line 36',0,288,black)
e.display_frame(buf)

# --------------------

# wrap text inside a box
black = 0
white = 1
# clear
fb.fill(white)
# display as much as this as fits in the box
str = 'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Etiam vel neque in elit tristique vulputate at et dui. Maecenas nec felis lectus. Pellentesque sit amet facilisis dui. Maecenas ac arcu euismod, tempor massa quis, ultricies est.'

# this could be useful as a new method in FrameBuffer
def text_wrap(str,x,y,color,w,h,border=None):
	# optional box border
	if border is not None:
		fb.rect(x, y, w, h, border)
	cols = w // 8
	# for each row
	j = 0
	for i in range(0, len(str), cols):
		# draw as many chars fit on the line
		fb.text(str[i:i+cols], x, y + j, color)
		j += 8
		# dont overflow text outside the box
		if j >= h:
			break

# clear
fb.fill(white)

# draw text box 1
# box position and dimensions
print('Box 1')
bx = 8
by = 8
bw = 112 #  = 14 cols
bh = 112 #  = 14 rows (196 chars in total)
text_wrap(str,bx,by,black,bw,bh,black)
e.display_frame(buf)

# draw text box 2
print('Box 2 & 3')
bx = 0
by = 128
bw = w # 128 = 16 cols
bh = 6 * 8 # 48 = 6 rows (96 chars in total)
text_wrap(str,bx,by,black,bw,bh,black)

# draw text box 3
bx = 0
by = 184
bw = w//2 # 64 = 8 cols
bh = 8 * 8 # 64 = 8 rows (64 chars in total)
text_wrap(str,bx,by,black,bw,bh,None)
e.display_frame(buf)

# --------------------
          robert-hhR 2 Replies Last reply Reply Quote 0
          • robert-hhR Offline
            robert-hh @gael cobert
            last edited by

            @gael-cobert You have set MOSI to P15. That's not possible. and in fact you use P19

            1 Reply Last reply Reply Quote 0
            • robert-hhR Offline
              robert-hh @gael cobert
              last edited by

              @gael-cobert In the epaper driver the dimension is set to 640x384, in your control code you use 600x384. These two setting must match.

              G 2 Replies Last reply Reply Quote 0
              • G Offline
                gael cobert @robert-hh
                last edited by gael cobert

                @robert-hh
                yes thanks
                i checked the screen model
                i have this one : 5.83inch-e-paper (waveshare website 640x480)
                so
                i changed the driver for : epaper5in83 (600x448)
                but now i have this error

                Traceback (most recent call last):
                File "<stdin>", line 60, in <module>
                File "/flash/lib/epaper5in83.py", line 136, in display_frame
                IndexError: bytearray index out of range

                """
	Example for 4.2 inch black & white Waveshare E-ink screen
	Run on ESP32
"""

import epaper5in83
from machine import Pin, SPI

# SPIV on ESP32
 

rst = Pin('P11')
dc = Pin('P10')
busy = Pin('P15')
cs = Pin('P4')
clk = Pin('P9')
mosi = Pin('P19')


spi = SPI(0, mode=SPI.MASTER, baudrate=2000000, polarity=0, phase=0, pins=(clk, mosi, None))

e = epaper5in83.EPD(spi, cs, dc, rst, busy)
e.init()

w = 600
h = 448
x = 0
y = 0

# --------------------

# use a frame buffer
# 400 * 300 / 8 = 15000 - thats a lot of pixels
import framebuf
buf = bytearray(w * h // 8)
fb = framebuf.FrameBuffer(buf, w, h, framebuf.MONO_HLSB)
black = 0
white = 1
fb.fill(white)

# --------------------

# write hello world with black bg and white text
from image_dark import hello_world_dark
from image_light import hello_world_light
print('Image dark')
#bufImage = hello_world_dark
#fbImage = framebuf.FrameBuffer(bufImage, 128, 296, framebuf.MONO_HLSB)
#fb.blit(fbImage, 20, 2)
#bufImage = hello_world_light
#fbImage = framebuf.FrameBuffer(bufImage, 128, 296, framebuf.MONO_HLSB)
#fb.blit(fbImage, 168, 2)
#e.display_frame(buf)

# --------------------

# write hello world with white bg and black text
print('Image light')
e.display_frame(hello_world_light)

# --------------------


print('Frame buffer things')
fb.fill(white)
fb.text('Hello World',30,0,black)
#fb.pixel(30, 10, black)
#fb.hline(30, 30, 10, black)
#fb.vline(30, 50, 10, black)
#fb.line(30, 70, 40, 80, black)
#fb.rect(30, 90, 10, 10, black)
#fb.fill_rect(30, 110, 10, 10, black)
#for row in range(0,36):
#	fb.text(str(row),0,row*8,black)
#fb.text('Line 36',0,288,black)
e.display_frame(buf)

# --------------------

# wrap text inside a box
black = 0
white = 1
# clear
fb.fill(white)
# display as much as this as fits in the box
str = 'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Etiam vel neque in elit tristique vulputate at et dui. Maecenas nec felis lectus. Pellentesque sit amet facilisis dui. Maecenas ac arcu euismod, tempor massa quis, ultricies est.'

# this could be useful as a new method in FrameBuffer
def text_wrap(str,x,y,color,w,h,border=None):
	# optional box border
	if border is not None:
		fb.rect(x, y, w, h, border)
	cols = w // 8
	# for each row
	j = 0
	for i in range(0, len(str), cols):
		# draw as many chars fit on the line
		fb.text(str[i:i+cols], x, y + j, color)
		j += 8
		# dont overflow text outside the box
		if j >= h:
			break

# clear
fb.fill(white)

# draw text box 1
# box position and dimensions
print('Box 1')
bx = 8
by = 8
bw = 112 #  = 14 cols
bh = 112 #  = 14 rows (196 chars in total)
text_wrap(str,bx,by,black,bw,bh,black)
e.display_frame(buf)

# draw text box 2
print('Box 2 & 3')
bx = 0
by = 128
bw = w # 128 = 16 cols
bh = 6 * 8 # 48 = 6 rows (96 chars in total)
text_wrap(str,bx,by,black,bw,bh,black)

# draw text box 3
bx = 0
by = 184
bw = w//2 # 64 = 8 cols
bh = 8 * 8 # 64 = 8 rows (64 chars in total)
text_wrap(str,bx,by,black,bw,bh,None)
e.display_frame(buf)

# --------------------
                1 Reply Last reply Reply Quote 0
                • G Offline
                  gael cobert @robert-hh
                  last edited by gael cobert

                  @robert-hh
                  hello i have another 4.2 paper ink screen (WFT0420CZ15)
                  so i changed the driver and the resolution (400x300), no more error but the screen do not respond / change :p

                  """
	Example for 4.2 inch black & white Waveshare E-ink screen
	Run on ESP32
"""

import epaper4in2
from machine import Pin, SPI

# SPIV on ESP32
 

rst = Pin('P11')
dc = Pin('P10')
busy = Pin('P15')
cs = Pin('P4')
clk = Pin('P9')
mosi = Pin('P19')


spi = SPI(0, mode=SPI.MASTER, baudrate=2000000, polarity=0, phase=0, pins=(clk, mosi, None))

e = epaper4in2.EPD(spi, cs, dc, rst, busy)
e.init()

w = 400
h = 300
x = 0
y = 0

# --------------------

# use a frame buffer
# 400 * 300 / 8 = 15000 - thats a lot of pixels
import framebuf
buf = bytearray(w * h // 8)
fb = framebuf.FrameBuffer(buf, w, h, framebuf.MONO_HLSB)
black = 0
white = 1
fb.fill(white)

# --------------------

# write hello world with black bg and white text
#from image_dark import hello_world_dark
#from image_light import hello_world_light
print('Image dark')
#bufImage = hello_world_dark
#fbImage = framebuf.FrameBuffer(bufImage, 128, 296, framebuf.MONO_HLSB)
#fb.blit(fbImage, 20, 2)
#bufImage = hello_world_light
#fbImage = framebuf.FrameBuffer(bufImage, 128, 296, framebuf.MONO_HLSB)
#fb.blit(fbImage, 168, 2)
#e.display_frame(buf)

# --------------------

# write hello world with white bg and black text
print('Image light')
#e.display_frame(hello_world_light)

# --------------------


print('Frame buffer things')
fb.fill(white)
fb.text('Hello World',30,0,black)
#fb.pixel(30, 10, black)
#fb.hline(30, 30, 10, black)
#fb.vline(30, 50, 10, black)
#fb.line(30, 70, 40, 80, black)
#fb.rect(30, 90, 10, 10, black)
#fb.fill_rect(30, 110, 10, 10, black)
#for row in range(0,36):
#	fb.text(str(row),0,row*8,black)
#fb.text('Line 36',0,288,black)
e.display_frame(buf)

# --------------------

# wrap text inside a box
black = 0
white = 1
# clear
fb.fill(white)
# display as much as this as fits in the box
str = 'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Etiam vel neque in elit tristique vulputate at et dui. Maecenas nec felis lectus. Pellentesque sit amet facilisis dui. Maecenas ac arcu euismod, tempor massa quis, ultricies est.'

# this could be useful as a new method in FrameBuffer
def text_wrap(str,x,y,color,w,h,border=None):
	# optional box border
	if border is not None:
		fb.rect(x, y, w, h, border)
	cols = w // 8
	# for each row
	j = 0
	for i in range(0, len(str), cols):
		# draw as many chars fit on the line
		fb.text(str[i:i+cols], x, y + j, color)
		j += 8
		# dont overflow text outside the box
		if j >= h:
			break

# clear
fb.fill(white)

# draw text box 1
# box position and dimensions
print('Box 1')
bx = 8
by = 8
bw = 112 #  = 14 cols
bh = 112 #  = 14 rows (196 chars in total)
text_wrap(str,bx,by,black,bw,bh,black)
e.display_frame(buf)

# draw text box 2
print('Box 2 & 3')
bx = 0
by = 128
bw = w # 128 = 16 cols
bh = 6 * 8 # 48 = 6 rows (96 chars in total)
text_wrap(str,bx,by,black,bw,bh,black)

# draw text box 3
bx = 0
by = 184
bw = w//2 # 64 = 8 cols
bh = 8 * 8 # 64 = 8 rows (64 chars in total)
text_wrap(str,bx,by,black,bw,bh,None)
e.display_frame(buf)

# --------------------
                  robert-hhR 1 Reply Last reply Reply Quote 0
                  • G Offline
                    gael cobert @robert-hh
                    last edited by

                    @robert-hh
                    if i skip cs in the code,
                    how can i init : e = epaper4in2.EPD(spi,cs , dc, rst, busy)
                    because it needs "cs" ....

                    robert-hhR 1 Reply Last reply Reply Quote 0
                    • robert-hhR Offline
                      robert-hh @gael cobert
                      last edited by

                      @gael-cobert said in pyscan paper ink:

                      clk = Pin('P9')
                      mosi = Pin('P19')

                      No sign of life at all? no flickering? Check the wiring again.
                      I use the SPI constructor usually with the Pin names instead of Pin objects. That would then be:

                      clk = "P9"
                      mosi = "P19"

                      There are switches on the HAT. Did you set them accordingly. You are using the 4 wire SPI mode. And the display config switch must be at B.

                      G 1 Reply Last reply Reply Quote 0
                      • robert-hhR Offline
                        robert-hh @gael cobert
                        last edited by

                        @gael-cobert You assigned P4 to CS. So you can use that in the code, albeit cs is not connected to the display. The display has CS permanently active, since you wired it to GND. You can of course connect teh CS of the display to P4, or use P8, since you already soldered a connector to the bottom. But that seems not the problem here.

                        1 Reply Last reply Reply Quote 0
                        • G Offline
                          gael cobert @robert-hh
                          last edited by gael cobert

                          @robert-hh

                          no flickering at all, no sign of life :p
                          last photo
                          https://drive.google.com/file/d/12FfBYLkFZt49QnGn-oToWulc4fcd8lRR/view?usp=sharing

                          is it important to plug the RST cable ?

                          """
	Example for 4.2 inch black & white Waveshare E-ink screen
	Run on ESP32
"""

import epaper4in2
from machine import Pin, SPI

# SPIV on ESP32
 

rst = Pin('P11')
dc = Pin('P10')
busy = Pin('P15')
cs = Pin('P4')
clk = Pin('P9')
mosi = Pin('P19')


spi = SPI(0, mode=SPI.MASTER, baudrate=2000000, polarity=0, phase=0, pins=(clk, mosi, None))

e = epaper4in2.EPD(spi, cs, dc, rst, busy)
e.init()

w = 400
h = 300
x = 0
y = 0

# --------------------

# use a frame buffer
# 400 * 300 / 8 = 15000 - thats a lot of pixels
import framebuf
buf = bytearray(w * h // 8)
fb = framebuf.FrameBuffer(buf, w, h, framebuf.MONO_HLSB)
black = 0
white = 1
fb.fill(white)

print('print hello world')
fb.fill(white)
fb.text('Hello World',30,0,black)
#fb.pixel(30, 10, black)
#fb.hline(30, 30, 10, black)
#fb.vline(30, 50, 10, black)
#fb.line(30, 70, 40, 80, black)
#fb.rect(30, 90, 10, 10, black)
#fb.fill_rect(30, 110, 10, 10, black)
#for row in range(0,36):
#	fb.text(str(row),0,row*8,black)
#fb.text('Line 36',0,288,black)
e.display_frame(buf)


# --------------------
                          robert-hhR 1 Reply Last reply Reply Quote 0
                          • robert-hhR Offline
                            robert-hh @gael cobert
                            last edited by

                            @gael-cobert RST is required. Did you check that you connected the flat cable between HAT and display the right way around?
                            Checking the board it seems that the Pinout paper is wrong. The PIN where the white cabel is connected to is actually P10. left to it is P4, right to it P2. The rows in the Pinout are swapped.

                            1 Reply Last reply Reply Quote 0

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