Files
greaseweazle-firmware/scripts/greaseweazle/tools/read.py
2020-06-11 15:09:20 +01:00

124 lines
4.1 KiB
Python

# greaseweazle/tools/read.py
#
# Greaseweazle control script: Read Disk to Image.
#
# Written & released by Keir Fraser <keir.xen@gmail.com>
#
# This is free and unencumbered software released into the public domain.
# See the file COPYING for more details, or visit <http://unlicense.org>.
description = "Read a disk to the specified image file."
import sys
from greaseweazle.tools import util
from greaseweazle import error
from greaseweazle import usb as USB
from greaseweazle.flux import Flux
def open_image(args):
image_class = util.get_image_class(args.file)
error.check(hasattr(image_class, 'to_file'),
"%s: Cannot create %s image files"
% (args.file, image_class.__name__))
image = image_class.to_file(args.scyl, args.nr_sides)
if args.rate is not None:
image.bitrate = args.rate
for opt, val in args.file_opts.items():
error.check(hasattr(image, 'opts') and hasattr(image.opts, opt),
"%s: Invalid file option: %s" % (args.file, opt))
setattr(image.opts, opt, val)
return image
def normalise_rpm(flux, rpm):
"""Adjust all revolutions in Flux object to have specified rotation speed.
"""
index_list, freq = flux.index_list, flux.sample_freq
norm_to_index = 60/rpm * flux.sample_freq
norm_flux = []
to_index, index_list = index_list[0], index_list[1:]
factor = norm_to_index / to_index
for x in flux.list:
to_index -= x
if to_index >= 0:
norm_flux.append(x*factor)
continue
if not index_list:
break
n_to_index, index_list = index_list[0], index_list[1:]
n_factor = norm_to_index / n_to_index
norm_flux.append((x+to_index)*factor - to_index*n_factor)
to_index, factor = n_to_index, n_factor
return Flux([norm_to_index]*len(flux.index_list), norm_flux, freq)
def read_to_image(usb, args, image):
"""Reads a floppy disk and dumps it into a new image file.
"""
for cyl in range(args.scyl, args.ecyl+1):
for side in range(0, args.nr_sides):
print("\rReading Track %u.%u..." % (cyl, side), end="")
usb.seek((cyl, cyl*2)[args.double_step], side)
flux = usb.read_track(args.revs)
if args.rpm is not None:
flux = normalise_rpm(flux, args.rpm)
image.append_track(flux)
print()
# Write the image file.
with open(args.file, "wb") as f:
f.write(image.get_image())
def main(argv):
parser = util.ArgumentParser()
parser.add_argument("--drive", type=util.drive_letter, default='A',
help="drive to read (A,B,0,1,2)")
parser.add_argument("--revs", type=int, default=3,
help="number of revolutions to read per track")
parser.add_argument("--scyl", type=int, default=0,
help="first cylinder to read")
parser.add_argument("--ecyl", type=int, default=81,
help="last cylinder to read")
parser.add_argument("--single-sided", action="store_true",
help="single-sided read")
parser.add_argument("--double-step", action="store_true",
help="double-step drive heads")
parser.add_argument("--rate", type=int, nargs="?",
help="data rate (kbit/s)")
parser.add_argument("--rpm", type=int, nargs="?",
help="normalise to RPM")
parser.add_argument("file", help="output filename")
parser.add_argument("device", nargs="?", help="serial device")
parser.description = description
parser.prog += ' ' + argv[1]
args = parser.parse_args(argv[2:])
args.nr_sides = 1 if args.single_sided else 2
args.file, args.file_opts = util.split_opts(args.file)
try:
usb = util.usb_open(args.device)
image = open_image(args)
util.with_drive_selected(read_to_image, usb, args, image)
except USB.CmdError as error:
print("Command Failed: %s" % error)
if __name__ == "__main__":
main(sys.argv)
# Local variables:
# python-indent: 4
# End: