Motheure-simple 1st implementation

feature/motheure-simple/main

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+sudo -u sats /usr/bin/env php $(realpath $(dirname $0))/source/loop.php;

feature/motheure-simple/source/loop.php

@@ -0,0 +1,194 @@
+#!/usr/bin/php
+<?php
+
+	require_once __DIR__.'/../../../lib/include/php/const';
+
+	$f_data;
+	$start_ts;
+
+	$FEATURE   = basename(dirname(__DIR__));
+
+	$MOTOR_PIN = 29;
+
+	$LOOP_FREQ = 100; // check frequency in ms
+	$THRESHOLD = 4;   // maximum number of reads to wait for motor to be active back
+
+
+
+
+	/* READ MOTOR STATE
+	*
+	*/
+	function motheure_read(){
+
+		/* [1] Export global caches + variables
+		=========================================================*/
+		/* (1) Motor pin */
+		global $MOTOR_PIN;
+
+		/* [2] Try to read motor state
+		=========================================================*/
+		/* (1) Get its state */
+		$STATE = syscall( SOURCE_DIR."/lib/gpio/in $MOTOR_PIN" );
+
+		/* (2) If invalid */
+		if( is_bool($STATE) )
+			return false;
+
+		/* (3) If inactive, pass */
+		if( $STATE == 0 )
+			return false;
+
+		/* (4) Return TRUE means motor active */
+		return true;
+
+	}
+
+
+	/* MAIN LOOP
+	*
+	*/
+	function motheure_loop(){
+
+		/* [1] Export global caches + variables
+		=========================================================*/
+		/* (1) Log history file descriptor */
+		global $f_data;
+
+		/* (2) Motor pin */
+		global $MOTOR_PIN;
+
+		/* (3) Loop data */
+		global $start_ts;
+		global $LOOP_FREQ;
+		global $THRESHOLD;
+
+
+
+		/* [2] Try to read motor state
+		=========================================================*/
+		/* (1) Read motor pin */
+		if( !motheure_read() ) // if not active -> continue watching
+			return false;
+
+		slog('Motor active detected', 'motheure-simple:loop', 'motheure');
+
+		/* [3] Wait for machine to stop
+		=========================================================*/
+		/* (0) Userful variables */
+		$offset = 0; // offset (number of 0 reads)
+		$loop_ts = 0; // loop start time
+		$stop_ts = microtime(true); // last active time for now
+
+		while( $offset <= $THRESHOLD ){ // exit when motor active for $threshold cycles
+
+			/* (1) Start loop timer */
+			$loop_ts = microtime(true);
+
+			/* (2) If stopped -> increment offset */
+			if( !motheure_read() ){
+				$offset++;
+
+			/* (3) If not stopped */
+			}else{
+				$offset = 0;
+				$stop_ts = microtime(true); // last active time for now
+			}
+
+			/* (4) Wait for loop to last @LOOP_FREQ seconds (if not already elapsed) */
+			while( microtime(true) - $loop_ts < ($LOOP_FREQ/1000) );
+		}
+
+
+
+		/* [2] Main loop
+		=========================================================*/
+		/* (1) Log action to default log file */
+		$f_data->fwrite( json_encode([
+			$stop_ts - $start_ts
+		]).PHP_EOL );
+
+		/* (2) Return status */
+		return true;
+
+	}
+
+
+
+
+
+
+
+
+
+
+
+
+
+	function motheure_setup(){
+
+		/* [0] Initialize global variables
+		=========================================================*/
+		/* (1) File descriptiors */
+		global $f_data;
+
+		/* (3) Useful data */
+		global $FEATURE;
+		global $MOTOR_PIN;
+
+		/* [1] Open file descriptors on useful files
+		=========================================================*/
+		/* (1) Append accesses (logs) */
+		if( !file_exists(DATA_DIR."/$FEATURE") )
+			file_put_contents(DATA_DIR."/$FEATURE", '');
+
+		$f_data = new SplFileObject(DATA_DIR."/$FEATURE", 'a');
+
+
+		/* [2] Set up GPIO pin
+		=========================================================*/
+		/* (1) Set as input */
+		if( !syscall(SOURCE_DIR."/lib/gpio/in $MOTOR_PIN") ){
+			slog('Cannot set up motor pin as INPUT', 'motheure-simple:setup');
+			return 127;
+		}
+
+
+
+		return 0;
+	}
+
+
+
+
+
+	/* [1] Set up daemon
+	=========================================================*/
+	/* (1) Set up */
+	$exec = motheure_setup();
+
+	/* (2) Manage error */
+	if( $exec != 0 ){
+		slog('cannot set up the daemon', 'motheure-simple:loop');
+		die($exec);
+	}
+
+	/* (3) Success message */
+	slog('daemon started (loop)', 'motheure-simple:loop');
+
+
+
+
+	/* [2] Daemon loop
+	=========================================================*/
+	while( true ){
+
+		/* (1) Store time */
+		$start_ts = microtime(true);
+
+		/* (2) Execute loop code */
+		motheure_loop();
+
+	}
+?>
+

lib/gpio/in

@@ -30,14 +30,16 @@ test -d /sys/class/gpio/gpio$1 || echo $1 > /sys/class/gpio/export;
 
 
 
-# [4] Set mode to OUT
+# [4] Set mode to IN
 #========================================================#
 cat /sys/class/gpio/gpio$1/direction | grep -v "in" && echo "in" > /sys/class/gpio/gpio$1/direction;
 
 
 
 
-# [5] EXIT_CODE
+# [5] RETURN VALUE
 #========================================================#
-echo 0;
+VALUE="`cat /sys/class/gpio/gpio$1/value`";
-exit 0;
+
+echo $VALUE;
+exit $VALUE;

lib/include/php/func

@@ -19,8 +19,12 @@
 		$out = preg_replace('/\s+$/', '', $out);
 
 		/* (4) Manage result */
-		if( is_numeric($out) ) return ("$out"==="0");
+		if( is_numeric($out) && $out === "0" )
-		else                   return $out;
+			return false;
+		elseif( is_numeric($out) && $out === "127" )
+			return true;
+		else
+			return $out;
 	}
 
 	/* [2] Log management