BCL Programmers Manual V2.00 (PDF) - Barix

6.5.4 Multiple branching depending on an integer valueMultiple branching depending on an integer value is possible with the following syntax:ON E {GOSUB | GOTO } L1,[L2,[L3,....]]If E equals 1, then GOSUB/GOTO to label L1 is executed.If E equals 2 and L2 is given, then GOSUB/GOTO to the label L2 is executed.If E equals 3 and L3 is given, then GOSUB/GOTO to the label L3 is executed.etc.If E is less than 1 or greater than the number of given labels, no action is taken.Note: Since it is possible to use complex expressions as E, jumping can take place forvarious values. For example, by shifting the value of integer variable V by 499 we can usemultiple branching to jump in the cases 500, 501, 502:ON (V-499) GOTO 6010,6020,60306.6 TimeSystem variable _DTS_ is inicialized during boot time and then incremented every second.On devices supporting an RTC (realtime clock chip) _DTS_ is initialized to the current timeread from the RTC (number of seconds since 1/1/1970), on other devices _DTS_ is inicializedto zero or set via NTP protocol._DTS_ can be used when programming time dependent programs.Any value can be assigned to _DTS_ using the following code sequence:_DTS_ =0DELAY 0_DTS_=valueIf RTC is supported by the device, it's value is updated as well.DELAY EDelays the execution of the program for E milliseconds (maximum possible delay is 65535ms).Code example:DELAY 500SYSLOG "DONE"waits half a second and then sends syslog message "DONE"Note: DELAY is ignored in ON-call subroutine during the ON-call event handling.6.7 Eve ntsA program can have a limited event-driven structure using the ON..GOSUB construct.6.7.1 TimersFour independent software timers (resolution in milliseconds) can be used to trigger the callof a subroutine. Timers must be set up using the TIMER statementTIMER E0, ESet the timer E0 to trigger every E milliseconds. The timer is reset with this statement so it willbe first triggered after E milliseconds.Valid timers are 1, 2, 3, 4.Code example: TIMER 1,100defines the timer to go off every 100 millisecondsA parameter of 0 disables the timer.Barix AG | 23/106