Try this:
Save the python code below as 'file-check.py' into a folder named 'python' in your machine config folder and mark as executable.
This user component will create a hal pin 'file-checked.file-changed' and output a pulse if the file is modified:
#!/usr/bin/env python3
Code:
#!/usr/bin/env python3
import os
import time
import hal
import linuxcnc
h = hal.component("file-check")
h.newpin("file-changed", hal.HAL_BIT, hal.HAL_OUT)
h.ready()
# create a connection to the status channel
s = linuxcnc.stat()
# this is the file being checked for updates (example looks for 'file.txt' in the config folder)
file_path = 'file.txt'
# length of output puls in milliseconds
pulse_length = 1000
last_modified = os.path.getmtime(file_path)
h['file-changed'] = False
try:
while 1:
s.poll()
# we don't want to reload when program is running
if s.task_mode == 2 and s.state == 1: # ie AUTO-mode and 'RCS_DONE'
current_modified = os.path.getmtime(file_path)
if current_modified != last_modified:
print("File has changed!")
h['file-changed'] = True
timer_start = round(time.time()*1000)
last_modified = current_modified
if h['file-changed'] and timer_start + pulse_length <= round(time.time()*1000):
h['file-changed'] = False
except KeyboardInterrupt:
raise SystemExit
To load this on startup add this to the [HAL] section of your .ini file:
Code:
HALCMD = loadusr -W ./python/file-check.py
then add this line to your POSTGUI_HALFILE:
Code:
net file-reload file-check.file-changed gmoccapy.h-button.button-1
