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Initial check-in of the module hw_customer_display.

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Alexis de Lattre 11 years ago
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  1. 24
      hw_customer_display/__init__.py
  2. 56
      hw_customer_display/__openerp__.py
  3. 24
      hw_customer_display/controllers/__init__.py
  4. 182
      hw_customer_display/controllers/main.py

24
hw_customer_display/__init__.py
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# -*- encoding: utf-8 -*-
##############################################################################
#
# Hardware Customer Display module for OpenERP
# Copyright (C) 2014 Akretion (http://www.akretion.com)
# @author Alexis de Lattre <alexis.delattre@akretion.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
##############################################################################
from . import controllers

56
hw_customer_display/__openerp__.py
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# -*- encoding: utf-8 -*-
##############################################################################
#
# Hardware Customer Display module for OpenERP
# Copyright (C) 2014 Akretion (http://www.akretion.com)
# @author Alexis de Lattre <alexis.delattre@akretion.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
##############################################################################
{
'name': 'Hardware Customer Display',
'version': '0.1',
'category': 'Hardware Drivers',
'license': 'AGPL-3',
'summary': 'Adds a support for Customer LCD in Point of Sale',
'description': """
Hardware Customer Display
=========================
This module adds support for Customer Display in the Point of Sale. It has been tested with a Bixolon BCD-1100 (http://www.bixolon.com/html/en/product/product_detail.xhtml?prod_id=61), but should support most serial and USB-serial LCD displays out-of-the-box or with inheritance of a few functions. This module is designed to be installed on the *POSbox* (i.e. the proxy on which the USB devices are connected) and not on the Odoo server.
The configuration of the hardware is done in the configuration file of the Odoo server of the POSbox. You should add the following entries in the configuration file:
* customer_display_device_name (default = /dev/ttyUSB0)
* customer_display_device_rate (default = 9600)
* customer_display_device_timeout (default = 2 seconds)
* customer_display_device_rows (default = 2)
* customer_display_device_cols (default = 20)
This module has been developped during a POS code sprint at Akretion France from July 7th to July 10th 2014.
Please contact Alexis de Lattre from Akretion <alexis.delattre@akretion.com> for any help or question about this module.
""",
'author': 'Akretion',
'website': 'http://www.akretion.com',
'depends': ['hw_proxy'],
'external_dependencies': {
'python' : ['serial', 'unidecode'],
},
'data': [],
'active': False,
}

24
hw_customer_display/controllers/__init__.py
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# -*- encoding: utf-8 -*-
##############################################################################
#
# Hardware Customer Display module for OpenERP
# Copyright (C) 2014 Akretion (http://www.akretion.com)
# @author Alexis de Lattre <alexis.delattre@akretion.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
##############################################################################
from . import main

182
hw_customer_display/controllers/main.py
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# -*- encoding: utf-8 -*-
##############################################################################
#
# Hardware Customer Display module for OpenERP
# Copyright (C) 2014 Akretion (http://www.akretion.com)
# @author Alexis de Lattre <alexis.delattre@akretion.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
##############################################################################
import logging
import simplejson
import time
from threading import Thread, Lock
from Queue import Queue
from unidecode import unidecode
from serial import Serial
import openerp.addons.hw_proxy.controllers.main as hw_proxy
from openerp import http
from openerp.tools.config import config
logger = logging.getLogger(__name__)
class CustomerDisplayDriver(Thread):
def __init__(self):
Thread.__init__(self)
self.queue = Queue()
self.lock = Lock()
self.status = {'status': 'connecting', 'messages': []}
self.device_name = config.get(
'customer_display_device_name', '/dev/ttyUSB0')
self.device_rate = int(config.get(
'customer_display_device_rate', 9600))
self.device_timeout = int(config.get(
'customer_display_device_timeout', 2))
self.device_rows = int(config.get(
'customer_display_device_rows', 2))
self.device_cols = int(config.get(
'customer_display_device_cols', 20))
self.serial = False
def get_status(self):
self.push_task('status')
return self.status
def set_status(self, status, message=None):
if status == self.status['status']:
if message is not None and message != self.status['messages'][-1]:
self.status['messages'].append(message)
else:
self.status['status'] = status
if message:
self.status['messages'] = [message]
else:
self.status['messages'] = []
if status == 'error' and message:
logger.error('Display Error: '+message)
elif status == 'disconnected' and message:
logger.warning('Disconnected Display: '+message)
def lockedstart(self):
with self.lock:
if not self.isAlive():
self.daemon = True
self.start()
def push_task(self, task, data=None):
self.lockedstart()
self.queue.put((time.time(), task, data))
def move_cursor(self, col, row):
# Bixolon spec : 11. "Move Cursor to Specified Position"
self.cmd_serial_write('\x1B\x6C' + chr(col) + chr(row))
def display_text(self, lines):
logger.debug(
"Preparing to send the following lines to LCD: %s" % lines)
if len(lines) > self.device_rows:
logger.error(
'Odoo POS sends %d rows but LCD only has %d rows'
% (len(lines), self.device_rows))
return
assert len(lines) <= self.device_rows, 'Too many lines'
lines_ascii = []
for line in lines:
lines_ascii.append(unidecode(line))
row = 0
for dline in lines_ascii:
row += 1
self.move_cursor(1, row)
if len(line) > self.device_cols:
logger.error(
'Odoo POS sends %d characters but LCD only has %d cols'
% (len(line), self.device_cols))
return
self.serial_write(dline)
def setup_customer_display(self):
'''Set LCD cursor to off
If your LCD has different setup instruction(s), you should
inherit this function'''
# Bixolon spec : 35. "Set Cursor On/Off"
self.cmd_serial_write('\x1F\x43\x00')
logger.debug('LCD cursor set to off')
def clear_customer_display(self):
'''If your LCD has different clearing instruction, you should inherit
this function'''
# Bixolon spec : 12. "Clear Display Screen and Clear String Mode"
self.cmd_serial_write('\x0C')
logger.debug('Customer display cleared')
def cmd_serial_write(self, command):
'''If your LCD requires a prefix and/or suffix on all commands,
you should inherit this function'''
assert isinstance(command, str), 'command must be a string'
self.serial_write(command)
def serial_write(self, text):
assert isinstance(text, str), 'text must be a string'
self.serial.write(text)
def send_text_customer_display(self, text_to_display):
lines = simplejson.loads(text_to_display)
assert isinstance(lines, list), 'lines_list should be a list'
try:
logger.debug(
'Opening serial port %s for customer display with baudrate %d'
% (self.device_name, self.device_rate))
self.serial = Serial(
self.device_name, self.device_rate,
timeout=self.device_timeout)
logger.debug('serial.is_open = %s' % self.serial.isOpen())
self.setup_customer_display()
self.clear_customer_display()
self.display_text(lines)
except Exception, e:
logger.error('Exception in serial connection: %s' % str(e))
finally:
if self.serial:
logger.debug('Closing serial port for customer display')
self.serial.close()
def run(self):
while True:
try:
timestamp, task, data = self.queue.get(True)
if task == 'display':
self.send_text_customer_display(data)
elif task == 'status':
pass
except Exception as e:
self.set_status('error', str(e))
driver = CustomerDisplayDriver()
hw_proxy.drivers['customer_display'] = driver
class CustomerDisplayProxy(hw_proxy.Proxy):
@http.route(
'/hw_proxy/send_text_customer_display', type='json', auth='none',
cors='*')
def send_text_customer_display(self, text_to_display):
logger.debug('LCD: Call send_text_customer_display')
driver.push_task('display', text_to_display)
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