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#!/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

HALCMD = loadusr -W ./python/file-check.py

net file-reload file-check.file-changed gmoccapy.h-button.button-1

module liteeth_core (
    input  wire          rgmii_clocks_rx,
    output wire          rgmii_clocks_tx,
    input  wire          rgmii_int_n,
    output wire          rgmii_mdc,
    input  wire          rgmii_mdio,
    output wire          rgmii_rst_n,
    input  wire          rgmii_rx_ctl,
    input  wire    [3:0] rgmii_rx_data,
    output wire          rgmii_tx_ctl,
    output wire    [3:0] rgmii_tx_data,

    input  wire          sys_clock,
    input  wire          sys_reset,

    input  wire   [31:0] udp0_sink_data,
    input  wire          udp0_sink_last,
    output wire          udp0_sink_ready,
    input  wire          udp0_sink_valid,

    output wire   [31:0] udp0_source_data,
    output wire          udp0_source_error,
    output wire          udp0_source_last,
    input  wire          udp0_source_ready,
    output wire          udp0_source_valid
);