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# Simulator of AVR-targetted code on a PC                                    #
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To compile the simulation code, use

  $ make -f Makefile-SIM

The simulator will open a serial port for communication. If you don't want to
connect a null modem cable, you can use 'socat' to connect two serial ports:

  socat -d -d PTY,raw,echo=0 PTY,raw,echo=0
  2013/10/24 17:42:04 socat[3375] N PTY is /dev/pts/12
  2013/10/24 17:42:04 socat[3375] N PTY is /dev/pts/13
  2013/10/24 17:42:04 socat[3375] N starting data transfer loop with FDs [3,3] and [5,5]

On the first line of output, socat will tell you the name of the virtual serial
port. Pass this as an argument to the simulator (in another terminal):

  $ ./sim /dev/pts/12

Give the other virtual serial port to an application like pronterface.

Now you can send G-codes from the socat terminal. The simulation code will
print any data sent via the firmware's serial interface. Stepper positions
will be shown in green, counting a rising slope on the pin as one step.