197 lines
4.0 KiB
PHP
197 lines
4.0 KiB
PHP
#!/usr/bin/php
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<?php
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require_once __DIR__.'/../../../lib/include/php/const';
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$f_data;
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$start_ts;
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$FEATURE = basename(dirname(__DIR__));
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$MOTOR_PIN = 19;
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$LOOP_FREQ = 100; // check frequency in ms
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$THRESHOLD = 4; // maximum number of reads to wait for motor to be active back
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/* READ MOTOR STATE
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*
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*/
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function motheure_read(){
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/* [1] Export global caches + variables
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=========================================================*/
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/* (1) Motor pin */
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global $MOTOR_PIN;
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/* [2] Try to read motor state
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=========================================================*/
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/* (1) Get its state */
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$STATE = syscall( SOURCE_DIR."/lib/gpio/in $MOTOR_PIN" );
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/* (3) If active, pass */
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if( $STATE == 0 ){
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slog('read: 1', 'motheure-simple:loop', 'motheure');
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return true;
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}
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/* (4) Return FALSE means motor inactive */
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slog('read: 0', 'motheure-simple:loop', 'motheure');
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return false;
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}
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/* MAIN LOOP
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*
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*/
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function motheure_loop(){
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/* [1] Export global caches + variables
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=========================================================*/
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/* (1) Log history file descriptor */
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global $f_data;
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/* (2) Motor pin */
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global $MOTOR_PIN;
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/* (3) Loop data */
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global $start_ts;
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global $LOOP_FREQ;
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global $THRESHOLD;
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/* [2] Try to read motor state
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=========================================================*/
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/* (1) Read motor pin */
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if( !motheure_read() ) // if not active -> continue watching
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return false;
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slog('Motor start', 'motheure-simple:loop', 'motheure');
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/* [3] Wait for machine to stop
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=========================================================*/
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/* (0) Userful variables */
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$offset = 0; // offset (number of 0 reads)
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$loop_ts = 0; // loop start time
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$stop_ts = microtime(true); // last active time for now
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while( $offset <= $THRESHOLD ){ // exit when motor active for $threshold cycles
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/* (1) Start loop timer */
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$loop_ts = microtime(true);
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/* (2) If stopped -> increment offset */
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if( !motheure_read() ){
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$offset++;
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slog("Motor offset: $offset/$THRESHOLD", 'motheure-simple:loop', 'motheure');
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/* (3) If not stopped */
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}else{
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$offset = 0;
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$stop_ts = microtime(true); // last active time for now
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}
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/* (4) Wait for loop to last @LOOP_FREQ seconds (if not already elapsed) */
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while( microtime(true) - $loop_ts < ($LOOP_FREQ/1000) );
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}
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/* [2] Main loop
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=========================================================*/
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/* (1) Log action to default log file */
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$f_data->fwrite( json_encode([
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floor( $stop_ts - $start_ts )
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]).PHP_EOL );
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slog("Motor stop", 'motheure-simple:loop', 'motheure');
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/* (2) Return status */
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return true;
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}
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function motheure_setup(){
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/* [0] Initialize global variables
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=========================================================*/
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/* (1) File descriptiors */
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global $f_data;
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/* (3) Useful data */
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global $FEATURE;
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global $MOTOR_PIN;
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/* [1] Open file descriptors on useful files
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=========================================================*/
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/* (1) Append accesses (logs) */
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if( !file_exists(DATA_DIR."/$FEATURE") )
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file_put_contents(DATA_DIR."/$FEATURE", '');
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$f_data = new SplFileObject(DATA_DIR."/$FEATURE", 'a');
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/* [2] Set up GPIO pin
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=========================================================*/
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/* (1) Set as input */
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if( !syscall(SOURCE_DIR."/lib/gpio/in $MOTOR_PIN") ){
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slog('Cannot set up motor pin as INPUT', 'motheure-simple:setup');
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return 127;
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}
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return 0;
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}
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/* [1] Set up daemon
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=========================================================*/
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/* (1) Set up */
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$exec = motheure_setup();
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/* (2) Manage error */
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if( $exec != 0 ){
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slog('cannot set up the daemon', 'motheure-simple:loop');
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die($exec);
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}
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/* (3) Success message */
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slog('daemon started (loop)', 'motheure-simple:loop');
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/* [2] Daemon loop
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=========================================================*/
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while( true ){
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/* (1) Store time */
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$start_ts = microtime(true);
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/* (2) Execute loop code */
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motheure_loop();
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}
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?>
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