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'''
* Copyright (C) 2016 Alex Koren
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
'''
import serial
import time
import sys
import os
import re
e = "\xff\xff\xff"
def getBaudrate(ser, fSize=None, checkModel=None):
for baudrate in (2400, 4800, 9600, 19200, 38400, 57600, 115200):
ser.baudrate = baudrate
ser.timeout = 3000 / baudrate + .2
print 'Trying with baudrate: ' + str(baudrate) + '...'
ser.write("\xff\xff\xff")
ser.write('connect')
ser.write("\xff\xff\xff")
r = ser.read(128)
if 'comok' in r:
print 'Connected with baudrate: ' + str(baudrate) + '...'
noConnect = False
status, unknown1, model, fwversion, mcucode, serial, flashSize = r.strip("\xff\x00").split(',')
print 'Status: ' + status.split(' ')[0]
if status.split(' ')[1] == "1":
print 'Touchscreen: yes'
else:
print 'Touchscreen: no'
print 'Model: ' + model
print 'Firmware version: ' + fwversion
print 'MCU code: ' + mcucode
print 'Serial: ' + serial
print 'Flash size: ' + flashSize
if fSize and fSize > flashSize:
print 'File too big!'
return False
if checkModel and not checkModel in model:
print 'Wrong Display!'
return False
return True
return False
def setDownloadBaudrate(ser, fSize, baudrate):
ser.write("")
ser.write("whmi-wri " + str(fSize) + "," + str(baudrate) + ",0" + e)
time.sleep(.05)
ser.baudrate = baudrate
ser.timeout = .5
r = ser.read(1)
if "\x05" in r:
return True
return False
def transferFile(ser, filename, fSize):
with open(filename, 'rb') as hmif:
dcount = 0
while True:
data = hmif.read(4096)
if len(data) == 0:
break
dcount += len(data)
ser.timeout = 5
ser.write(data)
sys.stdout.write('\rDownloading, %3.1f%%...'% (dcount / float(fSize) * 100.0))
sys.stdout.flush()
ser.timeout = .5
time.sleep(.5)
r = ser.read(1)
if "\x05" in r:
continue
else:
print
return False
break
print
return True
def upload(ser, filename, checkModel=None):
if not getBaudrate(ser, os.path.getsize(filename), checkModel):
print 'Could not find baudrate'
exit(1)
if not setDownloadBaudrate(ser, os.path.getsize(filename), 115200):
print 'Could not set download baudrate'
exit(1)
if not transferFile(ser, filename, os.path.getsize(filename)):
print 'Could not transfer file'
exit(1)
print 'File transferred successfully'
exit(0)
if __name__ == "__main__":
if len(sys.argv) != 4 and len(sys.argv) != 3:
print 'usage:\npython nextion.py file_to_upload.tft /path/to/dev/ttyDevice [nextion_model_name]\
\nexample: nextion.py newUI.tft /dev/ttyUSB0 NX3224T024\
\nnote: model name is optional'
exit(1)
try:
ser = serial.Serial(sys.argv[2], 9600, timeout=5)
except serial.serialutil.SerialException:
print 'could not open serial device ' + sys.argv[2]
exit(1)
if serial.VERSION <= "3.0":
if not ser.isOpen():
ser.open()
else:
if not ser.is_open:
ser.open()
checkModel = None
if len(sys.argv) == 4:
checkModel = sys.argv[3]
pattern = re.compile("^NX\d{4}[TK]\d{3}$")
if not pattern.match(checkModel):
print 'Invalid model name. Please give a correct one (e.g. NX3224T024)'
exit(1)
upload(ser, sys.argv[1], checkModel)
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