User Manual

TMCM-1276 TMCL
™
Firmware Manual • Firmware Version V1.13 | Document Revision V1.01 • 2019-MAR-20
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• Do not allow the normal program flow to run into an interrupt handling routine.
The following example shows the use of a timer interrupt:
1 VECT 0, Timer0Irq // define the interrupt vector
SGP 0, 3, 1000 // configure the interrupt: set its period to 1000 ms
3 EI 0 // enable this interrupt
EI 255 // globally switch on interrupt processing
5
// Main program : toggles output 3, using a WAIT command for the delay
7 Loop:
SIO 3, 2, 1
9 WAIT TICKS , 0, 50
SIO 3, 2, 0
11 WAIT TICKS , 0, 50
JA Loop
13
// Here is the interrupt handling routine
15 Timer0Irq:
GIO 0, 2 // check if OUT0 is high
17 JC NZ , Out0Off // jump if not
SIO 0, 2, 1 // switch OUT0 high
19 RETI //end of interrupt
Out0Off:
21 SIO 0, 2, 0 // switch OUT0 low
RETI //end of interrupt
In the example above, the interrupt numbers are being used directly. To make the program better readable
use the provided include file Interrupts.inc. This file defines symbolic constants for all interrupt numbers
which can be used in all interrupt commands. The beginning of the program above then looks as follows:
#include Interrupts.inc
2 VECT TI_TIMER0 , Timer0Irq
SGP TI_TIMER0 , 3, 1000
4 EI TI_TIMER0
EI TI_GLOBAL
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