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#!/usr/bin/env python2
# Script to implement a test console with firmware over serial port
#
# Copyright (C) 2016,2017 Kevin O'Connor <kevin@koconnor.net>
#
# This file may be distributed under the terms of the GNU GPLv3 license.
import sys, optparse, os, re, logging
import reactor, serialhdl, pins, util, msgproto
re_eval = re.compile(r'\{(?P<eval>[^}]*)\}')
class KeyboardReader:
def __init__(self, ser, reactor):
self.ser = ser
self.reactor = reactor
self.fd = sys.stdin.fileno()
util.set_nonblock(self.fd)
self.mcu_freq = 0
self.pins = None
self.data = ""
reactor.register_fd(self.fd, self.process_kbd)
self.connect_timer = reactor.register_timer(self.connect, reactor.NOW)
self.local_commands = {
"PINS": self.set_pin_map, "SET": self.set_var, "DELAY": self.delay
}
self.eval_globals = {}
def connect(self, eventtime):
self.ser.connect()
self.ser.handle_default = self.handle_default
self.mcu_freq = self.ser.msgparser.get_constant_float('CLOCK_FREQ')
mcu = self.ser.msgparser.get_constant('MCU')
self.pins = pins.get_pin_map(mcu)
self.reactor.unregister_timer(self.connect_timer)
return self.reactor.NEVER
def output(self, msg):
sys.stdout.write("%s\n" % (msg,))
sys.stdout.flush()
def handle_default(self, params):
self.output(self.ser.msgparser.format_params(params))
def update_evals(self, eventtime):
self.eval_globals['freq'] = self.mcu_freq
self.eval_globals['clock'] = self.ser.get_clock(eventtime)
def set_pin_map(self, parts):
mcu = self.ser.msgparser.get_constant('MCU')
self.pins = pins.get_pin_map(mcu, parts[1])
def set_var(self, parts):
val = parts[2]
try:
val = float(val)
except ValueError:
pass
self.eval_globals[parts[1]] = val
def delay(self, parts):
try:
val = int(parts[1])
except ValueError as e:
self.output("Error: %s" % (str(e),))
return
try:
msg = self.ser.msgparser.create_command(' '.join(parts[2:]))
except msgproto.error as e:
self.output("Error: %s" % (str(e),))
return
self.ser.send(msg, minclock=val)
def translate(self, line, eventtime):
evalparts = re_eval.split(line)
if len(evalparts) > 1:
self.update_evals(eventtime)
try:
for i in range(1, len(evalparts), 2):
e = eval(evalparts[i], self.eval_globals)
if type(e) == type(0.):
e = int(e)
evalparts[i] = str(e)
except:
self.output("Unable to evaluate: %s" % (line,))
return None
line = ''.join(evalparts)
self.output("Eval: %s" % (line,))
if self.pins is not None:
try:
line = pins.update_command(
line, self.mcu_freq, self.pins).strip()
except:
self.output("Unable to map pin: %s" % (line,))
return None
if line:
parts = line.split()
if parts[0] in self.local_commands:
self.local_commands[parts[0]](parts)
return None
try:
msg = self.ser.msgparser.create_command(line)
except msgproto.error as e:
self.output("Error: %s" % (str(e),))
return None
return msg
def process_kbd(self, eventtime):
self.data += os.read(self.fd, 4096)
kbdlines = self.data.split('\n')
for line in kbdlines[:-1]:
line = line.strip()
cpos = line.find('#')
if cpos >= 0:
line = line[:cpos]
if not line:
continue
msg = self.translate(line.strip(), eventtime)
if msg is None:
continue
self.ser.send(msg)
self.data = kbdlines[-1]
def main():
usage = "%prog [options] <serialdevice> <baud>"
opts = optparse.OptionParser(usage)
options, args = opts.parse_args()
serialport, baud = args
baud = int(baud)
logging.basicConfig(level=logging.DEBUG)
r = reactor.Reactor()
ser = serialhdl.SerialReader(r, serialport, baud)
kbd = KeyboardReader(ser, r)
try:
r.run()
except KeyboardInterrupt:
sys.stdout.write("\n")
if __name__ == '__main__':
main()
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