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Cleanups, better documentation, more modular

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Rename Miniterm->Jimterm.
Rename Color->JimtermColor.
Move all color handling into the Jimterm class.
Cleanup imports.
This commit is contained in:
Jim Paris 2012-11-14 19:25:46 -05:00
parent aa95e4f513
commit 61f5c8a3f1
1 changed files with 77 additions and 57 deletions

134
terminal.py
View File

@ -1,5 +1,18 @@
#!/usr/bin/python
# Based on miniterm sample in pyserial
# Jim Paris <jim@jtan.com>
# Simple terminal program for serial devices. Supports setting
# baudrates and simple LF->CRLF mapping on input, but does not
# configure flow control, carrier detection, etc.
# ^C quits. There is no escaping, so you can't currently send this
# character to the remote host. Piping input or output should work.
# Supports multiple serial devices simultaneously. When using more
# than one, each device's output is in a different color. Input
# is directed to the first device, or can be sent to all devices
# with --all.
import sys
import os
@ -7,35 +20,9 @@ import serial
import threading
import traceback
import time
import re
import signal
class Color(object):
def __init__(self):
self.total = 1
self.codes = [""]
self.reset = ""
def setup(self, total):
self.total = total
# Initialize colorama, if needed for the total number of devices
# we have. We avoid even loading colorama unless we need it.
if total > 1:
import colorama
colorama.init()
self.codes = [
colorama.Fore.CYAN + colorama.Style.BRIGHT,
colorama.Fore.YELLOW + colorama.Style.BRIGHT,
colorama.Fore.MAGENTA + colorama.Style.BRIGHT,
colorama.Fore.RED + colorama.Style.BRIGHT,
colorama.Fore.GREEN + colorama.Style.BRIGHT,
colorama.Fore.BLUE + colorama.Style.BRIGHT,
colorama.Fore.WHITE + colorama.Style.BRIGHT,
]
self.reset = colorama.Style.RESET_ALL
def code(self, n):
return self.codes[n % self.total]
g_color = Color()
# Need OS-specific method for getting keyboard input.
if os.name == 'nt':
import msvcrt
class Console:
@ -59,11 +46,11 @@ elif os.name == 'posix':
self.fd = sys.stdin.fileno()
try:
self.old = termios.tcgetattr(self.fd)
new = termios.tcgetattr(self.fd)
new[3] = new[3] & ~termios.ICANON & ~termios.ECHO & ~termios.ISIG
new[6][termios.VMIN] = 1
new[6][termios.VTIME] = 0
termios.tcsetattr(self.fd, termios.TCSANOW, new)
tc = termios.tcgetattr(self.fd)
tc[3] = tc[3] & ~termios.ICANON & ~termios.ECHO & ~termios.ISIG
tc[6][termios.VMIN] = 1
tc[6][termios.VTIME] = 0
termios.tcsetattr(self.fd, termios.TCSANOW, tc)
except termios.error:
# ignore errors, so we can pipe stuff to this script
pass
@ -87,7 +74,28 @@ else:
raise ("Sorry, no terminal implementation for your platform (%s) "
"available." % sys.platform)
class Miniterm:
class JimtermColor(object):
def setup(self, total):
self.total = total
if total > 1:
self.codes = [
"\x1b[1;36m", # cyan
"\x1b[1;33m", # yellow
"\x1b[1;35m", # magenta
"\x1b[1;31m", # red
"\x1b[1;32m", # green
"\x1b[1;34m", # blue
"\x1b[1;37m", # white
]
self.reset = "\x1b[0m"
else:
self.codes = [""]
self.reset = ""
total = 1
def code(self, n):
return self.codes[n % self.total]
class Jimterm:
"""Normal interactive terminal"""
def __init__(self,
@ -95,7 +103,13 @@ class Miniterm:
suppress_write_bytes = None,
suppress_read_firstnull = True,
transmit_all = False,
add_cr = False):
add_cr = False,
color = True):
self.color = JimtermColor()
if color:
self.color.setup(len(serials))
self.serials = serials
self.suppress_write_bytes = suppress_write_bytes or ""
self.suppress_read_firstnull = suppress_read_firstnull
@ -104,6 +118,14 @@ class Miniterm:
self.transmit_all = transmit_all
self.add_cr = add_cr
def print_header(self, nodes, bauds):
for (n, (node, baud)) in enumerate(zip(nodes, bauds)):
print (self.color.code(n)
+ node + ", " + str(baud) + " baud"
+ self.color.reset)
print "^C to exit"
print "----------"
def start(self):
self.alive = True
@ -111,7 +133,7 @@ class Miniterm:
for (n, serial) in enumerate(self.serials):
self.threads.append(threading.Thread(
target = self.reader,
args = (serial, g_color.code(n))
args = (serial, self.color.code(n))
))
# console->serial
@ -154,9 +176,10 @@ class Miniterm:
if ((ord(data) >= 32 and ord(data) < 128) or
data == '\r' or data == '\n' or data == '\t'):
sys.stdout.write(data)
if self.add_cr and data == '\n':
sys.stdout.write('\r')
sys.stdout.write('\r' + data)
else:
sys.stdout.write(data)
else:
sys.stdout.write('\\x'+("0"+hex(ord(data))[2:])[-2:])
@ -165,7 +188,7 @@ class Miniterm:
sys.stdout.write(color)
sys.stdout.flush()
traceback.print_exc()
sys.stdout.write(g_color.reset)
sys.stdout.write(self.color.reset)
sys.stdout.flush()
self.console.cleanup()
os._exit(1)
@ -201,7 +224,7 @@ class Miniterm:
else:
self.serials[0].write(c)
except Exception as e:
sys.stdout.write(g_color.reset)
sys.stdout.write(self.color.reset)
sys.stdout.flush()
traceback.print_exc()
self.console.cleanup()
@ -226,11 +249,12 @@ class Miniterm:
serial.timeout = saved_timeouts[n]
# Cleanup
print ""
print self.color.reset # and a newline
self.console.cleanup()
if __name__ == "__main__":
import argparse
import re
formatter = argparse.ArgumentDefaultsHelpFormatter
description = ("Simple serial terminal that supports multiple devices. "
@ -245,7 +269,7 @@ if __name__ == "__main__":
"per-device baudrates.")
parser.add_argument("--crlf", "-c", action="store_true",
help="add CR after incoming LF")
help="add CR before incoming LF")
parser.add_argument("--all", "-a", action="store_true",
help="Send keystrokes to all devices, not just "
"the first one")
@ -257,8 +281,8 @@ if __name__ == "__main__":
args = parser.parse_args()
devs = []
used_nodes = []
g_color.setup(len(args.device))
nodes = []
bauds = []
for (n, device) in enumerate(args.device):
m = re.search(r"^(.*)@([1-9][0-9]*)$", device)
if m is not None:
@ -267,26 +291,22 @@ if __name__ == "__main__":
else:
node = device
baud = args.baudrate
if node in used_nodes:
sys.stderr.write("error: %s already open!\n" % node)
if node in nodes:
sys.stderr.write("error: %s specified more than once\n" % node)
raise SystemExit(1)
try:
dev = serial.Serial(node, baud)
except serial.serialutil.SerialException:
sys.stderr.write("error opening %s\n" % node)
raise SystemExit(1)
if not args.quiet:
print (g_color.code(n)
+ node + ", " + str(args.baudrate) + " baud"
+ g_color.reset)
used_nodes.append(node)
nodes.append(node)
bauds.append(baud)
devs.append(dev)
term = Jimterm(devs,
transmit_all = args.all,
add_cr = args.crlf,
color = (os.name == "posix"))
if not args.quiet:
print "^C to exit"
print "----------"
term = Miniterm(devs,
transmit_all = args.all,
add_cr = args.crlf)
term.print_header(nodes, bauds)
term.run()