pyscan paper ink
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@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. -
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) # -------------------- -
@gael-cobert You have set MOSI to P15. That's not possible. and in fact you use P19
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@gael-cobert In the epaper driver the dimension is set to 640x384, in your control code you use 600x384. These two setting must match.
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@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 errorTraceback (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) # -------------------- -
@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-hh
if i skip cs in the code,
how can i init : e = epaper4in2.EPD(spi,cs , dc, rst, busy)
because it needs "cs" .... -
@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.
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@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.
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no flickering at all, no sign of life :p
last photo
https://drive.google.com/file/d/12FfBYLkFZt49QnGn-oToWulc4fcd8lRR/view?usp=sharingis 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) # -------------------- -
@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.
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