{"id":3130,"date":"2025-04-17T08:49:03","date_gmt":"2025-04-17T08:49:03","guid":{"rendered":"https:\/\/webprojects.cloud\/wordpress\/splatco\/?post_type=spl_knowledgebase&p=3130"},"modified":"2025-06-10T12:40:13","modified_gmt":"2025-06-10T12:40:13","slug":"fstsincemark-d22","status":"publish","type":"spl_knowledgebase","link":"https:\/\/webprojects.cloud\/wordpress\/splatco\/knowledgebase\/programming-reference\/instructions-arranged-by-function\/timing-instructions\/elapsed-timers\/task-timers\/fstsincemark-d22\/","title":{"rendered":"fSTSinceMark [D>=22]"},"content":{"rendered":"\n

Calculates the time elapsed since the last\u00a0MarkTime<\/a><\/code>\u00a0in\u00a0the current task<\/em>. The result is returned as a floating point number in W. This will be an integer value in the range 0 to 16,777,215 times 10mS. This instruction may only be used a\u00a0MultiTrack<\/a>\u00a0task. It is based on the assumption that there was a prior\u00a0MarkTime<\/a><\/code><\/code>\u00a0instruction in this task (failing which the result is unpredictable).<\/p>\n\n\n\n

From dialect 20 some controllers allow you to program the 10mS basic “tick” interval over the range 1mS to 255mS via a setting in the\u00a0CPU<\/a>\u00a0device. See the CPU device documentation for your controller.<\/p>\n\n\n\n

Note<\/strong>
SPLat 8 bit controllers (green boards) do not support the use of task timers if Multitrack multi-tasking is not running.  In addition, on these controllers you cannot use Pause, WaitOnT, WaitOffT or WaitOnKT between a MarkTime and its corresponding fSTSinceMark or LoopIfTiming.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

SPLat 32 bit controllers (black boards) have none of these restrictions.  So you can use task timers on a SPLat 32 bit controller even if you are single tasking and can use any of the Pause or Wait instructions together with MarkTime and its siblings.<\/p>\n\n\n\n

See\u00a0MultiTrack tutorial<\/a>.<\/p>\n\n\n\n

Dialect<\/a>\u00a0exclusions: Not available in dialects before 22.<\/p>\n\n\n\n

Example:<\/h6>\n\n\n\n

The following program has two tasks.\u00a0Timer<\/code>\u00a0measures the duration of an “On press” of the push button on input 16 of an\u00a0MS120<\/a>\u00a0and displays it on the LCD. Blinker blinks the LED on output 11 once per second as long as the button is depressed.<\/p>\n\n\n\n


        On              20              ;Backlight
        LaunchTask      Timer
        LaunchTask      Blinker
        RunTasksForever
 
;Measure and display button on-time        
Timer:
        WaitOn          16
        MarkTime                        ;Start timing
        WaitOff         16
        fSTSinceMark                    ;Get the elapsed time
        fLoadQ          10
        fMul
        OBLCD_SetCur    0,0
        OBLCD_fDispW    8,0
        OBLCD_Text      \"mS\"
        GoTo            Timer  
        
;Blink a LED while the button is on
Blinker:                       
        Off             11
        WaitOn          16
Blinker2:        
        On              11
        WaitOffT        16,5
        GoIfT           Blinker
        Off             11
        WaitOffT        16,95
        GoIfT           Blinker
        GoTo            Blinker2<\/pre>\n","protected":false},"excerpt":{"rendered":"
Calculates the time elapsed since the last\u00a0MarkTime\u00a0in\u00a0the current task. The result is returned as a floating point number in W. This will be an integer…<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":3129,"menu_order":0,"template":"","class_list":["post-3130","spl_knowledgebase","type-spl_knowledgebase","status-publish","hentry"],"acf":[],"yoast_head":"\nfSTSinceMark [D>=22] - SPLat Controls<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"fSTSinceMark [D>=22] - SPLat Controls\" \/>\n<meta property=\"og:description\" content=\"Calculates the time elapsed since the last\u00a0MarkTime\u00a0in\u00a0the current task. The result is returned as a floating point number in W. 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