下面的Python脚本非常适合我的目的。你知道吗
我这样运行:python smoothie-stream.py /path/to/file.gcode 192.168.3.222
#!/usr/bin/env python
"""\
Stream g-code to Smoothie telnet connection
Based on GRBL stream.py
"""
from __future__ import print_function
import sys
import telnetlib
import argparse
def write_raw_sequence(tn, seq):
sock = tn.get_socket()
if sock is not None:
sock.send(seq)
# Define command line argument interface
parser = argparse.ArgumentParser(description='Stream g-code file to Smoothie over telnet.')
parser.add_argument('gcode_file', type=argparse.FileType('r'),
help='g-code filename to be streamed')
parser.add_argument('ipaddr',
help='Smoothie IP address')
parser.add_argument('-q','--quiet',action='store_true', default=False,
help='suppress output text')
args = parser.parse_args()
f = args.gcode_file
verbose = not args.quiet
# Stream g-code to Smoothie
print("Streaming " + args.gcode_file.name + " to " + args.ipaddr)
tn = telnetlib.Telnet(args.ipaddr)
# turn on prompt
#write_raw_sequence(tn, telnetlib.IAC + telnetlib.DO + "\x55")
# read startup prompt
tn.read_until("Smoothie command shell")
okcnt= 0
linecnt= 0
for line in f:
tn.write(line)
linecnt+=1
rep= tn.read_eager()
okcnt += rep.count("ok")
if verbose:
#print("linecnt:" + str(linecnt))
print("linecnt:" + str(okcnt))
#print("Waiting for complete...")
while okcnt < linecnt:
rep= tn.read_some()
okcnt += rep.count("ok")
if verbose:
#print("linecnt:" + str(linecnt))
print("linecnt:" + str(okcnt))
tn.write("exit\n")
tn.read_all()
print("Done")
有时我需要暂停它的执行,所以我向它发送信号kill -TSTP
(基本上是在控制台中点击CTRL+Z)。然后我就可以成功地用fg
或bg
恢复流媒体。我的问题是脚本的执行不会立即暂停。无论是tcpdump还是ngrep,我都可以向您保证,停止流式传输需要30秒到1分钟(通过telnet发送多条线路,至少50条!)。我已经检查了Python的telnetlib(在Github),但是我不知道为什么脚本不会立即暂停。你知道吗
目前没有回答
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