Waveshare 2.9" E-Paper Display (It's driving me mad plz) #12180

minizom · 2023-08-07T00:28:11Z

minizom
Aug 7, 2023

I will pre-empt this with I am a fool, and there is probably a simple solution I'm not seeing. I am using the Waveshare Waveshare 2.9" E-Paper Display Module for Raspberry Pi Pico (Black/White) (296×128). I have tested the hardware thoroughly and all of it works ok. It displays the text horizontally when the display is verticle. I simply want to have the text display horizontally (across) the e-ink display when it is landscape. I am new wot micro python (yes I'm one of those people)

I am aware there are a number of similar issues/threads/guides with other waveshape displays such as
https://forum.micropython.org/viewtopic.php?f=18&t=6319&sid=b987deb8bb64da2bb21b5db6f5433764
or https://github.com/waveshareteam/e-Paper/blob/master/RaspberryPi_JetsonNano/python/lib/waveshare_epd/epd2in9d.py

But I simply cannot get it to work and I'm on the verge of giving up and purchasing a shitty LCD to do the job.
the guide they provide is: https://www.waveshare.com/wiki/2.9inch_e-Paper_Module_Manual#Working_With_Raspberry_Pi
and I have attached ta trimmed-down example code.

I have tried a number of methods, but most were rubbish.
I'm guessing the answer is in one of several lines.
swapping framebuf.MONO_HLSB) to framebuf.MONO_VLSB) (might have the wrong idea about what that does )
and starts with the correct landscape code 'self.send_data(0x07)' in 'def init'

Any help would be appreciated, or If u just want to mock that is also ok. let me know if I can provide any other information.

Code below:

`from machine import Pin, SPI
import framebuf
import utime

EPD_2IN9D_lut_vcomDC =[
0x00, 0x08, 0x00, 0x00, 0x00, 0x02,
0x60, 0x28, 0x28, 0x00, 0x00, 0x01,
0x00, 0x14, 0x00, 0x00, 0x00, 0x01,
0x00, 0x12, 0x12, 0x00, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00,
]
EPD_2IN9D_lut_ww =[
0x40, 0x08, 0x00, 0x00, 0x00, 0x02,
0x90, 0x28, 0x28, 0x00, 0x00, 0x01,
0x40, 0x14, 0x00, 0x00, 0x00, 0x01,
0xA0, 0x12, 0x12, 0x00, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
]
EPD_2IN9D_lut_bw =[
0x40, 0x17, 0x00, 0x00, 0x00, 0x02,
0x90, 0x0F, 0x0F, 0x00, 0x00, 0x03,
0x40, 0x0A, 0x01, 0x00, 0x00, 0x01,
0xA0, 0x0E, 0x0E, 0x00, 0x00, 0x02,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
]
EPD_2IN9D_lut_wb =[
0x80, 0x08, 0x00, 0x00, 0x00, 0x02,
0x90, 0x28, 0x28, 0x00, 0x00, 0x01,
0x80, 0x14, 0x00, 0x00, 0x00, 0x01,
0x50, 0x12, 0x12, 0x00, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
]
EPD_2IN9D_lut_bb =[
0x80, 0x08, 0x00, 0x00, 0x00, 0x02,
0x90, 0x28, 0x28, 0x00, 0x00, 0x01,
0x80, 0x14, 0x00, 0x00, 0x00, 0x01,
0x50, 0x12, 0x12, 0x00, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
]
'''

'''
EPD_2IN9D_lut_vcom1 =[
0x00, 0x19, 0x01, 0x00, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00
,0x00, 0x00,
]
EPD_2IN9D_lut_ww1 =[
0x00, 0x19, 0x01, 0x00, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
]
EPD_2IN9D_lut_bw1 =[
0x80, 0x19, 0x01, 0x00, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
]
EPD_2IN9D_lut_wb1 =[
0x40, 0x19, 0x01, 0x00, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
]
EPD_2IN9D_lut_bb1 =[
0x00, 0x19, 0x01, 0x00, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
]

EPD_WIDTH = 128
EPD_HEIGHT = 296
RST_PIN = 12
DC_PIN = 8
CS_PIN = 9
BUSY_PIN = 13
FULL_UPDATE = 0
PART_UPDATE = 1

class EPD_2IN9_D(framebuf.FrameBuffer):
def init(self):
self.reset_pin = Pin(RST_PIN, Pin.OUT)

    self.busy_pin = Pin(BUSY_PIN, Pin.IN, Pin.PULL_UP)
    self.cs_pin = Pin(CS_PIN, Pin.OUT)
    self.width = EPD_WIDTH
    self.height = EPD_HEIGHT
    
    self.lut_vcomDC = EPD_2IN9D_lut_vcomDC
    self.lut_ww = EPD_2IN9D_lut_ww
    self.lut_bw = EPD_2IN9D_lut_bw
    self.lut_wb = EPD_2IN9D_lut_wb
    self.lut_bb = EPD_2IN9D_lut_bb
    
    self.lut_vcom1 = EPD_2IN9D_lut_vcom1
    self.lut_ww1 = EPD_2IN9D_lut_ww1
    self.lut_bw1 = EPD_2IN9D_lut_bw1
    self.lut_wb1 = EPD_2IN9D_lut_wb1
    self.lut_bb1 = EPD_2IN9D_lut_bb1
    
    self.spi = SPI(1)
    self.spi.init(baudrate=4000_000)
    self.dc_pin = Pin(DC_PIN, Pin.OUT)
    
    
    
    self.buffer = bytearray(self.width * self.height // 8)
    
    super().__init__(self.buffer, self.width, self.height, framebuf.MONO_VLSB)
    self.init()

def digital_write(self, pin, value):
    pin.value(value)

def digital_read(self, pin):
    return pin.value()

def delay_ms(self, delaytime):
    utime.sleep_ms(delaytime)

def spi_writebyte(self, data):
    self.spi.write(bytearray(data))

def module_exit(self):
    self.digital_write(self.reset_pin, 0)

# Hardware reset
def reset(self):
    self.digital_write(self.reset_pin, 1)
    self.delay_ms(200)
    self.digital_write(self.reset_pin, 0)
    self.delay_ms(2)
    self.digital_write(self.reset_pin, 1)
    self.delay_ms(200)   


def send_command(self, command):
    self.digital_write(self.dc_pin, 0)
    self.digital_write(self.cs_pin, 0)
    self.spi_writebyte([command])
    self.digital_write(self.cs_pin, 1)

def send_data(self, data):
    self.digital_write(self.dc_pin, 1)
    self.digital_write(self.cs_pin, 0)
    self.spi_writebyte([data])
    self.digital_write(self.cs_pin, 1)
    
def send_data1(self, buf):
    self.digital_write(self.dc_pin, 1)
    self.digital_write(self.cs_pin, 0)
    self.spi.write(bytearray(buf))
    self.digital_write(self.cs_pin, 1)
    
def ReadBusy(self):
    print('e-Paper busy')
    busy = 1
    self.send_command(0x71)
    while(self.digital_read(self.busy_pin) == 0): 
        self.send_command(0x71)
    self.delay_ms(200)    
    print('e-Paper busy release')

def SetFullReg(self):
    self.send_command(0x50)
    self.send_data(0xB7)
    
    self.send_command(0x20)
    self.send_data1(self.lut_vcomDC[0:44])
        
    self.send_command(0x21)
    self.send_data1(self.lut_ww[0:42])
    
    self.send_command(0x22)
    self.send_data1(self.lut_bw[0:42])

    self.send_command(0x23)
    self.send_data1(self.lut_bb[0:42])
        
    self.send_command(0x24)
    self.send_data1(self.lut_wb[0:42])
      

def SetPartReg(self):
    self.send_command(0x82)
    self.send_data(0x00)
    self.send_command(0x50)
    self.send_data(0xB7)
    
    self.send_command(0x20)
    self.send_data1(self.lut_vcom1[0:44])
        
    self.send_command(0x21)
    self.send_data1(self.lut_ww1[0:42])
        
    self.send_command(0x22)
    self.send_data1(self.lut_bw1[0:42])
        
    self.send_command(0x23)
    self.send_data1(self.lut_wb1[0:42])
        
    self.send_command(0x24)
    self.send_data1(self.lut_bb1[0:42])
        

def TurnOnDisplay(self):
    self.send_command(0x12)
    self.delay_ms(100)       
    self.ReadBusy()


def init(self): 
    print('init')
    self.reset()

    self.send_command(0x01)
    self.send_data(0x07) # important line, dictates horizontal veres verticle. 
    self.send_data(0x00)
    self.send_data(0x2B)
    self.send_data(0x2B)
    self.send_data(0x03)
    
    
    self.send_command(0x06)
    self.send_data(0x17)
    self.send_data(0x17)
    self.send_data(0x17)

    self.send_command(0x04) 
    self.ReadBusy()
    
    self.send_command(0x00)
    self.send_data(0xBF)
    self.send_data(0x0E)
    
    self.send_command(0x30)
    self.send_data(0x3A)
    
    self.send_command(0x61)
    self.send_data(self.width)
    self.send_data((self.height&0x100)>>8)
    self.send_data(self.height&0xff)
    
    self.send_command(0x82)
    self.send_data(0x28)
    
    
def display(self, image):
    high = self.height
    if( self.width % 8 == 0) :
        wide =  self.width // 8
    else :
        wide =  self.width // 8 + 1
    self.send_command(0x10)
    self.send_data1([0x00] * high * wide)
    
    self.send_command(0x13)
    self.send_data1(image)
        
    self.SetFullReg()
    self.TurnOnDisplay()
    
def display_Partial(self, image):
    self.SetPartReg()
    self.send_command(0x91)
    self.send_command(0x90)
    self.send_data(0)
    self.send_data(self.width - 1)
    
    self.send_data(0)
    self.send_data(0)
    self.send_data(self.height//256)
    self.send_data(self.height%256 - 1)
    self.send_data(0X28)
    
    high = self.height
    if( self.width % 8 == 0) :
        wide =  self.width // 8
    else :
        wide =  self.width // 8 + 1
    self.send_command(0x13)
    self.send_data1(image)
    
    self.TurnOnDisplay()



def Clear(self, color):
    high = self.height
    if( self.width % 8 == 0) :
        wide =  self.width // 8
    else :
        wide =  self.width // 8 + 1
    self.send_command(0x10)
    self.send_data1([color] * high * wide)
    
    self.send_command(0x13)
    self.send_data1([~color] * high * wide)
        
    self.SetFullReg()
    self.TurnOnDisplay()

def sleep(self):
    self.send_command(0x50)
    self.send_data(0xF7)
    self.send_command(0x02)
    self.send_command(0x07)
    self.send_data(0xA5)

if name=='main':
epd = EPD_2IN9_D()
epd.Clear(0x00)

epd.fill(0xff)
epd.text("hello", 5, 50, 0x00)
epd.display(epd.buffer)
epd.delay_ms(2000) 

epd.Clear(0x00)
epd.delay_ms(2000)
epd.sleep()`

kjm1102 · 2023-08-07T01:09:51Z

kjm1102
Aug 7, 2023

I haven't tangled with that particular display but I've found waveshare fairly responsive to technical questions if your patient.

1 reply

minizom Aug 7, 2023
Author

thnx for the suggestion :) responsive up to a point. They replied quickly but directed me to the existing product guide that appears to not work. I'm already waiting on a reply from them before posting on here.

peterhinch · 2023-08-07T09:40:13Z

peterhinch
Aug 7, 2023
Collaborator

Modifying display divers requires a fair degree of experience. Unless you're confident to tackle this, my advice is to find out what displays are already supported and choose one of those.

This link details some supported displays including eInk/ePaper. You could also look at awesome micropython.

2 replies

minizom Aug 7, 2023
Author

thnx for the response :) sadly that's what I'm learning. The e ink I purchased was advertised with the ability to display text either way I just assumed the correct display drivers for both portrait and landscape would have been provided not just portrait. You might be right, and unless waveshare get back to me or there are any other replies to this I may do just that, but sadly I've already created the housing components and board design with this display in mind. Thnx for the links I'll check both of them out now :)

peterhinch Aug 7, 2023
Collaborator

Your display seems similar to this one which is supported. It's possible that this driver will work with your display, or failing that, perhaps the Adafruit display will fit your housing. That driver supports landscape or portrait mode.

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

MicroPython

Waveshare 2.9" E-Paper Display (It's driving me mad plz) #12180

{{title}}

{{editor}}'s edit

{{editor}}'s edit

Replies: 2 comments 3 replies

{{title}}

{{title}}

{{title}}

{{title}}

{{title}}

Select a reply

MicroPython

Waveshare 2.9" E-Paper Display (It's driving me mad plz) #12180

minizom Aug 7, 2023

Replies: 2 comments · 3 replies

kjm1102 Aug 7, 2023

minizom Aug 7, 2023 Author

peterhinch Aug 7, 2023 Collaborator

minizom Aug 7, 2023 Author

peterhinch Aug 7, 2023 Collaborator

minizom
Aug 7, 2023

Replies: 2 comments 3 replies

kjm1102
Aug 7, 2023

minizom Aug 7, 2023
Author

peterhinch
Aug 7, 2023
Collaborator

minizom Aug 7, 2023
Author

peterhinch Aug 7, 2023
Collaborator