drepetto / chiplotle Goto Github PK

Hello,

I'm having an issue with plotter detection. My HP7550A is connected using a serial to USB adaptor. It is mounted on ttyUSB0. I chmod 777 ttyUSB0 to make sure I have permissions.

Chiplotle figures out that ttyUSB0 is up but then does not manage to establish a communication with the plotter. And I get this message:

☻  chiplotle                
 
  +-----------------------+
  |   Chiplotle! v.0.4.1  |
  +-----------------------+
 
Scanning serial ports...
Found ports:
  /dev/ttyS0
  /dev/ttyUSB0

Sniffing for plotters in all serial ports...
Found no plotter connected to any of the serial ports.
Is your plotter on?

chiplotle> 

Do you have any idea of what could be the trouble? Can it be related to my configuration file?

Thanks

Has anyone tried integrating a GPIB plotter into chiplotle using this API (and associated hardware)?

https://github.com/haata/ugsimple-usb-gpib

If not, any advice on where to start?

Chiplotle supports serial port communication but why not parallel port communication ?

My serial connection (with an FTDI chip USB adapter...) didn't work yet.

When connecting the plotter with an USB - parallel port adapter, it is recognized by my system (ls /dev/usb/)
and to send a file to the plotter the command cat drawing.hpgl > /dev/usb/lp0 is enough. (N.B. The user has to be in the lp group; I sent larger files and the buffering seems to work just fine)

Could we make Chiplotle recognize and work with devices connected via a parallel port ? (i.e. lp* and tty*)

Here my current workaround, moving a pen:

from shutil import copyfile
from datetime import datetime
# Chiplotle
from chiplotle.hpgl.commands import PA
from chiplotle.tools import io


def get_time_id():
    """
    generate a unique ID
    """
    time = datetime.now()
    id = time.strftime('%Y%m%d%H%M%S')
    return id


def make_hpgl_file(plot):
    """
    create the file to be printed
    """
    file_name = get_time_id() + '.hpgl'  
    path = sys.path[0]+'/tmp/' 
    file = path + file_name
    # write the hpgl instructions to the file
    io.save_hpgl(plot, file)
    return file


def send_to_plotter(hpgl_file):
    """
    copy file to printer to launch execution
    plotter is recognized as printer on prallel port
    """
    try:
        # equals CL $ cat drawing.hpgl > dev/usb/lp0
        copyfile(hpgl_file, '/dev/usb/lp0')
    except Exception as e:
        print(
            '[ERROR]\t\tCheck if plotter is plugged in [with $ ls /dev/usb/]' + str(e))


while True:
    # enter coordinate tuples where to move the pen
    new_location = input('Where to go ? ')

    plot = [PA([new_location])]

    # execute plot
    file = make_hpgl_file(plot)
    send_to_plotter(file)

My only guess is that the starting point would be in the search_and_instantiate_plotters() function...

When using the CP command with a second parameter of 0.0, chiplotle incorrectly omits the second parameter in the HPGL output. This also causes the hp2xx converter to fail.

It looks like this can be fixed simply by changing this line in commands.py:
if self.spaces and self.lines:
to
if self.spaces != None and self.lines != None:

Thank you.

In some of the test code there are references to PenDecorator, but I cannot find where it is defined.

from chiplotle.hpgl.decorators.pen import PenDecorator

Where is this implemented?