Integrate dellscan.py into repository

README.md

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+# Dellscan
+## Overview
+Scans files from device "Dell S2825cdn". Provides a simple command line interface.
+```
+$ dellscan --help
+Scan document from Dell S2825cdn device.
+Usage: dellscan file [--greyscale] [-gs] [FILE]
+Filenames cannot start with '-'.
+```
+## Installation:
+```
+$ sudo cp dellscan.py /usr/bin/dellscan
+$ sudo chmod +x /usr/bin/dellscan
+```

dellscan.py

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+#!/usr/bin/python3
+
+import sys
+import usb.core
+import usb.util
+import numpy as np
+import math
+
+from PIL import Image
+
+def read_assert(expected, dev, timeout = None):
+ ans = dev.read(0x82, len(bytearray(expected)),timeout)
+ if ans != bytearray(expected):
+ print("Expected", bytearray(expected).hex(), ", got", bytearray(ans).hex())
+
+def to_int(bytearr):
+ return int.from_bytes(bytearr, byteorder='big')
+
+def to_byte(value,length=2):
+ return value.to_bytes(length,byteorder='big')
+
+def rgbs(l):
+ return np.array(list(bytearray(l)))
+
+def scan(greyscale=False):
+ # Init device connection
+ dev = usb.core.find(idVendor=0x413c, idProduct=0x5910)
+ if dev is None:
+ raise ValueError('Device not found')
+ reattach = False
+ if dev.is_kernel_driver_active(1):
+ reattach = True
+ dev.detach_kernel_driver(1)
+ dev.reset()
+ dev.set_configuration()
+
+ # Init device connection
+ dev.write(0x01,bytearray([0,0x5a,0,0,0,0,0,0x04,0x20,0,0,0]))
+ ans = dev.read(0x82,64)
+
+ part = bytearray([0x15, 0x4e, 0xb2, 0xdd, 0x0e, 0xe2, 0x55, 0x56])
+ command = bytearray([0x00, 0x16, 0x00, 0x01, 0x00, 0x00, 0x01, 0x10, 0xec, 0xfe, 0x19, \
+ 0x99, 0x13, 0x7d, 0xe5, 0xff, 0x0e, 0xff, 0xe2, 0x5f, 0x9c, 0xbb, \
+ 0x00, 0x24])\
+ + 2*part + bytearray([0xc6, 0x0b, 0xa0, 0xb9, 0xb7, 0x5a, 0x3a, 0x29, 0x74,\
+ 0xcb, 0x94, 0x00, 0xe4, 0x52, 0x68, 0x4c, 0x0f, 0xd7,\
+ 0x29, 0x90, 0x73, 0x72, 0xf2, 0x00])\
+ + 2*part + bytearray([0x4c, 0x88, 0xea, 0x31, 0xae, 0xf8, 0x12, 0xb1, 0x39,\
+ 0x99, 0x42, 0x28, 0xc0, 0xc1, 0xa3, 0xa8])\
+ + 23*part
+ dev.write(0x01,command)
+
+ # Wait until init is ready
+ ans2 = dev.read(0x82, 8, timeout=100000)
+
+ current = bytearray([bytearray(ans2)[0]])
+ expected = current + bytearray([0x16, 0, 0x01, 0,0,0,0])
+ if ans2 != expected:
+ print("Expected", expected.hex(), ", got", ans.hex())
+
+ dev.write(0x01, current + bytearray([0x07, 0,0,0,0,0, 0x04, 0,0,0,0]))
+ read_assert(current + bytearray([0x07,0,0x01,0,0,0,0]), dev)
+
+ size = 4
+ byte_resolution = bytearray(to_byte(300))
+ if not greyscale:
+ byte_farbe = bytearray(to_byte(0x5,1))
+ else:
+ byte_farbe = bytearray(to_byte(0x2,1))
+ if size == 5: # Din A5
+ byte_width = bytearray(to_byte(0x1b50))
+ byte_height = bytearray(to_byte(0x26c0))
+ else: # Din A4
+ height = 3506
+ width = 2496
+ byte_width = bytearray(to_byte(0x26c0))
+ byte_height = bytearray(to_byte(0x36cc))
+ byte_realwidth = bytearray(to_byte(math.ceil(to_int(byte_width)/128)*128))
+
+ # Here indention could be added
+ byte_indention = bytearray(to_byte(0,1))
+
+ # Scan command
+ dev.write(0x01, current + bytearray([0x24, 0,0,0,0,0, 0x30, 0,0])+2*byte_resolution+bytearray(5)+byte_indention+bytearray(6)\
+ +byte_realwidth+bytearray(2)+byte_height+bytearray(2)+byte_farbe+bytearray([0x08,0,0x31])+bytearray(5)\
+ +byte_indention+bytearray(6)+byte_width+bytearray(2)+byte_height)
+ read_assert(current + bytearray([0x24,0,0x01,0,0,0,0]), dev)
+
+ dev.write(0x01, current + bytearray([0x1b, 0,0,0,0,0,0]))
+ read_assert(current + bytearray([0x1b,0,0x01,0,0,0,0]), dev)
+
+ dev.write(0x01, current + bytearray([0xc2, 0,0,0,0,0,0]))
+ if greyscale:
+ read_assert(current + bytearray([0xc2,0,0x02,0,0,0,0x0c,0x02,0,0,0,\
+ 0x00,0x85,0x91,0x40,\
+ 0x00,0x85,0x91,0x40]),dev, 100000)
+ else:
+ read_assert(current + bytearray([0xc2,0,0x02,0,0,0,0x0c,0x05,0,0,0,\
+ 0x01,0x90,0xb3,0xc0,\
+ 0x01,0x90,0xb3,0xc0]),dev, 100000)
+
+ scan = bytearray()
+
+ if greyscale:
+ scanamount = 33
+ lastcommand_end = bytearray([0x01,0x91,0x40])
+ readlast2 = 101888
+ readlast3 = 328
+ else:
+ scanamount = 100
+ lastcommand_end = bytearray([0,0xb3,0xc0])
+ readlast2 = 45056
+ readlast3 = 456
+
+
+ for i in range(0,scanamount):
+ dev.write(0x01, current + bytearray([0x28, 0,0,0,0,0, 0x04,0,0x04,0,0]))
+ part1 = dev.read(0x82,512)
+ part2 = dev.read(0x82,261632)
+ part3 = dev.read(0x82,8)
+ scan += part1[8:]+part2+part3
+
+ dev.write(0x01, current + bytearray([0x28, 0,0,0,0,0, 0x04,0])+lastcommand_end)
+ part1 = dev.read(0x82,512)
+ part2 = dev.read(0x82,readlast2)
+ part3 = dev.read(0x82,readlast3)
+ scan += part1[8:]+part2+part3
+
+ dev.write(0x01, current + bytearray([0x07, 0,0,0,0,0, 0x04, 0, 0, 0, 0]))
+ read_assert(current + bytearray([0x07,0,0x01,0,0,0,0]), dev)
+
+ dev.write(0x01, current + bytearray([0x17, 0,0,0,0,0,0]))
+ read_assert(current + bytearray([0x17,0,0x01,0,0,0,0]), dev, 100*1000)
+
+ usb.util.dispose_resources(dev)
+ if reattach:
+ dev.attach_kernel_driver(1)
+
+ colors = rgbs(scan)
+
+ if not greyscale:
+ realcolors = np.reshape(colors[0:3*height*width],(height,width,3))
+ else:
+ realcolors = np.reshape(colors[0:height*width],(height,width))
+
+ return realcolors
+
+def save_array_as_img(realcolors, name):
+ im = Image.fromarray(np.uint8(realcolors))
+ im.save(name)
+
+if __name__ == "__main__":
+ args = sys.argv[1:]
+ greyscale = False
+ filename = ""
+ if len(args) == 2 and (args[0] == "--greyscale" or args[0] == "-gs"):
+ greyscale = True
+ filename = args[1]
+ elif len(args) == 2 and (args[1] == "--greyscale" or args[1] == "-gs"):
+ greyscale = True
+ filename = args[0]
+ elif len(args) == 1:
+ filename = args[0]
+
+ if filename == "" or filename[0] == '-':
+ print("Scan document from Dell S2825cdn device.\n" + \
+ "Usage: dellscan file [--greyscale] [-gs] [FILE]\n"+\
+ "Filenames cannot start with '-'.")
+ else:
+ arr= scan(greyscale)
+ save_array_as_img(arr, filename)
+