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153 lines
4.2 KiB
153 lines
4.2 KiB
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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# ---------------------------------------------------------------------
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# pertelian.py: python module to control Pertelian X2040 USB LCD
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# ---------------------------------------------------------------------
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# Copyright (c) 2019 BOXTEC AG <src@boxtec.ch>
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#
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# 3. The name of the author may not be used to endorse or promote products
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# derived from this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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# INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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# AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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# THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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# --------------------------------------------------------------------------
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#
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"""
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__author__ = "boxtec (src@boxtec.ch)"
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__appname__ = "pertelian.py"
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__version__ = "1.00"
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__date__ = "2019-04-07"
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__license__ = "BSD"
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"""
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#######################
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# IMPORTS
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#######################
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import serial, time, struct
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#######################
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# CONSTANTS
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#######################
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LCD_WIDTH = 20
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STRING_WIDTH = 20
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SDELAY_DEFAULT = 0.01
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#DEFAULT_INIT = [0x38, 0x06, 0x10, 0x0c, 0x01]
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DEFAULT_INIT = [0x38, 0x06, 0x10, 0x0c, 0x01]
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FILLER_CHAR = " "
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#######################
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# Display class
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#######################
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class Display():
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# local methods
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def __init__(self, port='/dev/ttyUSB0', baudrate=115200, init_seq=DEFAULT_INIT):
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self._sp = serial.Serial(port, baudrate)
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self._display_init(init_seq)
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self.backlight(True)
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self.enable()
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self.lcdprintln("BOXTEC PERTELIAN LIB boxtec pertelian lib")
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self.lcdprintln("BOXTEC PERTELIAN LIB")
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self.lcdprintln("BOXTEC PERTELIAN LIB")
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self.lcdprintln("BOXTEC PERTELIAN LIB")
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self.lcdscroll()
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def __del__(self):
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self._sp.close()
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def _display_init(self, init_seq):
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for cmd in init_seq:
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self._sendcmd(cmd)
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def _senddata(self, data, datatype="C", delay=SDELAY_DEFAULT):
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for c in data:
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self._sp.write(chr(c))
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time.sleep(delay)
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def _sendcmd(self, cmd, delay=SDELAY_DEFAULT):
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cmd_data = (0xfe, cmd)
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self._senddata(cmd_data, delay)
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# public methods
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def enable(self):
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self._sendcmd(0x0c)
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def disable(self):
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self.clear()
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self.backlight(False)
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self._sendcmd(0x08)
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def backlight(self, on=True):
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if on:
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self._sendcmd(0x03)
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else:
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self._sendcmd(0x02)
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def clear(self):
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self._sendcmd(0x01)
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def lcdprintln(self, text):
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char_list = []
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for c in text:
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char_list.append(ord(c))
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if len(char_list) >= 20: break
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while len(char_list) < STRING_WIDTH:
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char_list.append(ord(FILLER_CHAR))
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self._senddata(char_list)
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def lcdprint(self, text):
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char_list = []
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for c in text:
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char_list.append(ord(c))
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self._senddata(char_list)
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def lcdcursor_set(self, line, position):
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#Row1-4 baseaddress:
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rowbase = [0x0, 0x40, 0x14, 0x54]
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self._sendcmd((rowbase[line-1] + position) | 0x80)
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def lcdscroll(self, text="", scroll_delay=0.1, iterations=1):
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if len(text) > 0:
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lcdprintln(text)
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for c in range(0, iterations):
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for i in range(0, STRING_WIDTH):
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self._sendcmd(0x1c)
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time.sleep(scroll_delay)
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