Error in the PyScan Pinout document

gael cobert

yes

"""
	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('P8')
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-hh

@gael-cobert I made a test with the static CS, and it did NOT work. So you have to connect cs. That's a little bit surprising, but .. You could try to use that P11 pin on the connector, or solder in another row of pins to get access to p4 and p10.

gael cobert

@robert-hh said in Error in the PyScan Pinout document:

CS

i put CS in P11

https://drive.google.com/file/d/12chEnjlWTnu94V6AZnhyeMdt583pmbWF/view?usp=sharing

and changed the code

import epaper4in2
from machine import Pin, SPI

# SPIV on ESP32
rst = Pin('P8')
dc = Pin('P10')
busy = Pin('P15')
cs = Pin('P11')
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

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)
e.display_frame(buf)

robert-hh

@gael-cobert Did it work? I'm not sure about using pins on the pyscan. Most of them have multiple labels, and when they are driven by the pyscan itself, they may not be usable.

Your small test script works here.

gael cobert

@robert-hh no it don't works :p
i don't know what to do ...

robert-hh

@gael-cobert Just give it a break. The connector where you have P11 now, is labeled as camera connector. As long as the camera is not used, all pins should be available. So let's focus on that, but not today. I will try to use the pyscan for that test tomorrow. At the moment, I use a simple expansion board.

gael cobert

@robert-hh ok thank you so much for your help :) i learned a lot of things indeed. See you tomorrow.

robert-hh

@gael-cobert Could not give it a rest, so I made a shot. This setting worked, all on the camera connector:

import epaper4in2
from machine import Pin, SPI

# SPIV on ESP32
sck = "P9"
miso = None
mosi = "P10"
dc = Pin("P3", Pin.OUT)
cs = Pin("P19", Pin.OUT)
rst = Pin("P11", Pin.OUT, value=1)
busy = Pin("P15", Pin.IN)
spi = SPI(0, baudrate=20000000, polarity=0, phase=0, pins=(sck, 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)
e.display_frame(buf)

The only problem that I had was the USB of the pyscan. I never used it before, and so the driver needed am update. I skipped that and connected with telnet.

gael cobert

@robert-hh said in Error in the PyScan Pinout document:

sck = "P9"
miso = None
mosi = "P10"
dc = Pin("P3", Pin.OUT)
cs = Pin("P19", Pin.OUT)
rst = Pin("P11", Pin.OUT, value=1)
busy = Pin("P15", Pin.IN)
spi = SPI(0, baudrate=20000000, polarity=0, phase=0, pins=(sck, mosi, None))

did you try it with a piscan ? i changed my code with your example but not change ... i changed P8 to P11
I changed other pin

https://drive.google.com/file/d/12dhAIFz4ND_cvRy4eSzi3o79BKnx_9EB/view?usp=sharing

robert-hh

@gael-cobert Yes. I used Pyscan for that. The same 0.7 version that you have. with long male/male adapter pins.
If that does not work, the problem may be somewhere else.

gael cobert

@robert-hh P11 is to the left of P13 ?

https://drive.google.com/file/d/12uRecBvZEub8N-LTEvIxTz0T2M0FdGH_/view?usp=sharing

can you give me a photo of your board ?

gael cobert

@robert-hh said in Error in the PyScan Pinout document:

import epaper4in2
from machine import Pin, SPI

SPIV on ESP32

sck = "P9"
miso = None
mosi = "P10"
dc = Pin("P3", Pin.OUT)
cs = Pin("P19", Pin.OUT)
rst = Pin("P11", Pin.OUT, value=1)
busy = Pin("P15", Pin.IN)
spi = SPI(0, baudrate=20000000, polarity=0, phase=0, pins=(sck, 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)
e.display_frame(buf)

it works !!!!!!!!

robert-hh

@gael-cobert Wonderful. Although the display update times are pretty long. So it's more suited for signs.

gael cobert

@robert-hh yes do you know why it's so long ? ( around 3 sec )

i have another question, i am using atom IDE, i want to use the NFC scan, but sometimes it stop, if i click "run selected files"
if i transfer main.py file via FTP it don't seem to execute when the board start, it's a little bit strange

import epaper4in2
from machine import Pin, SPI

# NFC

from pyscan import Pyscan
from MFRC630 import MFRC630
from LIS2HH12 import LIS2HH12
from LTR329ALS01 import LTR329ALS01
import binascii
import time
import pycom
import _thread

ttf_dir = 'ttf' 
# var NFC
# This is the default key for an unencrypted MiFare card
DEBUG = True  # change to True to see debug messages


VALID_CARDS = [[0x43, 0x95, 0xDD, 0xF8],
               [0x43, 0x95, 0xDD, 0xF9],
               [0x8C, 0x43, 0x00, 0x5C],
               [0x46, 0x5A, 0xEB, 0x7D, 0x8A, 0x08, 0x04]]

 
py = Pyscan()
nfc = MFRC630(py)
lt = LTR329ALS01(py)
li = LIS2HH12(py)

RGB_BRIGHTNESS = 0x8

RGB_RED = (RGB_BRIGHTNESS << 16)
RGB_GREEN = (RGB_BRIGHTNESS << 8)
RGB_BLUE = (RGB_BRIGHTNESS)

counter = 0

# SPIV on ESP32
sck = "P9"
miso = None
mosi = "P10"
dc = Pin("P3", Pin.OUT)
cs = Pin("P19", Pin.OUT)
rst = Pin("P11", Pin.OUT, value=1)
busy = Pin("P15", Pin.IN)
spi = SPI(0, baudrate=20000000, polarity=0, phase=0, pins=(sck, 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('bienvenue sur le système secureangel',30,0,black)
e.display_frame(buf)






# Make sure heartbeat is disabled before setting RGB LED
pycom.heartbeat(False)

# Initialise the MFRC630 with some settings
nfc.mfrc630_cmd_init()


def check_uid(uid, len):
    return VALID_CARDS.count(uid[:len])

def print_debug(msg):
    if DEBUG:
        print(msg)

def send_sensor_data(name, timeout):
    while(True):
        print(lt.light())
        print(li.acceleration())
        time.sleep(timeout)

def discovery_loop(nfc, id):
    while True:
        # Send REQA for ISO14443A card type
        print_debug('Sending REQA for ISO14443A card type...')
        atqa = nfc.mfrc630_iso14443a_WUPA_REQA(nfc.MFRC630_ISO14443_CMD_REQA)
        print_debug('Response: {}'.format(atqa))
        if (atqa != 0):
            # A card has been detected, read UID
            print_debug('A card has been detected, read UID...')
            uid = bytearray(10)
            uid_len = nfc.mfrc630_iso14443a_select(uid)
            print_debug('UID has length: {}'.format(uid_len))
            if (uid_len > 0):
                s =  binascii.hexlify(uid[:uid_len],' ').upper()
                card_id = ("{:02X}"*len(s)).format(*s)
                print_debug('card_id : -> {} <-'.format(card_id))
                tst = s.decode("utf-8") 
                print_debug('tst : {} <-'.format(tst))

                 
                if(tst == "8C 43 00 5C") :
                    print_debug('hello gael')
                    fb.fill(white)
                    fb.text('Hello Gaël ! :)',30,80,black)
                    e.display_frame(buf)
                
                print_debug('Checking if card with UID: [{:s}] is listed in VALID_CARDS...'.format(binascii.hexlify(uid[:uid_len],' ').upper()))
                if (check_uid(list(uid), uid_len)) > 0:
                    print_debug('Card is listed, turn LED green')
                    pycom.rgbled(RGB_GREEN)
                else:
                    print_debug('Card is not listed, turn LED red')
                    pycom.rgbled(RGB_RED)
                    fb.fill(white)
                    fb.text('carte introuvable :p',30,0,black)
                    e.display_frame(buf)
                    
        else:
            # No card detected
            #print_debug('Did not detect any card...')
            pycom.rgbled(RGB_BLUE)
        nfc.mfrc630_cmd_reset()
        time.sleep(.5)
        nfc.mfrc630_cmd_init()

# This is the start of our main execution... start the thread
_thread.start_new_thread(discovery_loop, (nfc, 0))
_thread.start_new_thread(send_sensor_data, ('Thread 2', 10))

robert-hh

@gael-cobert I cannot tell anything about the Pycom IDE with either Atom or VSCode. The seem to fail constantly.
I prefer to use primitive tools, like picocom | putty | beagle term for REPL, and plain ftp | filezilla or in the absence of wifi pyboard.py + mpr.py for file transfer.

Gijs

@robert-hh You are correct, Im not sure yet how they messed it up, but it seems to be a mirrorring issue. From what I see, the connector is labeled from the top view, but the square pad is definitely connected to GND, instead of PWR_EN

I'll make sure it gets fixed, thanks!

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Error in the PyScan Pinout document

SPIV on ESP32

--------------------

use a frame buffer

400 * 300 / 8 = 15000 - thats a lot of pixels

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