diff options
Diffstat (limited to 'scripts/avrsim.py')
| -rwxr-xr-x | scripts/avrsim.py | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/scripts/avrsim.py b/scripts/avrsim.py index ee1895a6..dfdb94b5 100755 --- a/scripts/avrsim.py +++ b/scripts/avrsim.py @@ -5,7 +5,7 @@ # # This file may be distributed under the terms of the GNU GPLv3 license. -import sys, optparse, os, pty, fcntl, termios, errno +import sys, optparse, time, os, pty, fcntl, termios, errno import pysimulavr SERIALBITS = 10 # 8N1 = 1 start, 8 data, 1 stop @@ -101,6 +101,31 @@ class Tracing: if self.dman is not None: self.dman.stopApplication() +# Pace the simulation scaled to real time +class Pacing(pysimulavr.PySimulationMember): + def __init__(self, rate): + pysimulavr.PySimulationMember.__init__(self) + self.sc = pysimulavr.SystemClock.Instance() + self.pacing_rate = 1. / (rate * SIMULAVR_FREQ) + self.rel_time = self.next_rel_time = time.time() + self.rel_clock = self.next_rel_clock = self.sc.GetCurrentTime() + self.delay = SIMULAVR_FREQ / 10000 + self.sc.Add(self) + def DoStep(self, trueHwStep): + curtime = time.time() + clock = self.sc.GetCurrentTime() + clock_diff = clock - self.rel_clock + time_diff = curtime - self.rel_time + offset = clock_diff * self.pacing_rate - time_diff + if offset > 0.000050: + time.sleep(offset) + if clock_diff > self.delay * 20: + self.rel_clock = self.next_rel_clock + self.rel_time = self.next_rel_time + self.next_rel_clock = clock + self.next_rel_time = curtime + return self.delay + # Forward data from a terminal device to the serial port pins class TerminalIO: def __init__(self): @@ -139,6 +164,8 @@ def main(): default="atmega644", help="type of AVR machine to simulate") opts.add_option("-s", "--speed", type="int", dest="speed", default=8000000, help="machine speed") + opts.add_option("-r", "--rate", type="float", dest="pacing_rate", default=0., + help="real-time pacing rate") opts.add_option("-b", "--baud", type="int", dest="baud", default=38400, help="baud rate of the emulated serial port") opts.add_option("-t", "--trace", type="string", dest="trace", @@ -167,6 +194,10 @@ def main(): sc.Add(dev) trace.load_options() + # Do optional real-time pacing + if options.pacing_rate: + pacing = Pacing(options.pacing_rate) + # Setup terminal io = TerminalIO() |