Basic Micro Studio Syntax Manual

Interrupts
Interrupts
While the program is executing it is possible to interrupt the execution to handle another event. The
events can be things like a pin changing from high to low or low to high. Other events can be received
data or timers counting down or counting up. There are several types of interrupts. The interrupt
system is an advance feature of MBasic and should only be explored by advanced users. A basic
understanding of interrupts and the limitations is required to utilize them properly. MBasic interrupts
are only available on BasicATOMPro processors(ProONE,Pro24,Pro28,Pro40 and ARC32)
ONINTERRUPT
oninterrupt interrupt, handler
• Interrupt - one of the listed interrupt types. See Interrupt Types table.
• Handler - the interrupt handler label to jump to when the interrupt triggers.
This is a directive to the compiler to specify the label to jump to when a specifi c interrupt triggers. The
interrupt handler label must use RESUME to exit the interrupt handler.
ONASMINTERRUPT
onasminterrupt interrupt, handler
• Interrupt - one of the listed interrupt types. See Interrupt Types table.
• Handler - the assembly interrupt handler label to jump to when the interrupt triggers.
This is a directive to the compiler to specify the label to jump to when a specifi c interrupt triggers. The
assembly interrupt handler must use the RTE assembly command to exit the interrupt handler.
ENABLE
enable {interrupt}
• Interrupt - an optional argument of one of the listed interrupt types. See Interrupt Types table.
Enables one or all interrupts. When used with no arguments the global interrupt enable fl ag is set.
When used with an interrupt argument, that interrupt’s enable fl ag is set. Only when both the global
interrupt fl ag and specifi c interrupt fl ags are set will those interrupts be allowed to trigger.
DISABLE
disable {interrupt}
• Interrupt - an optional argument of one of the listed interrupt types. See Interrupt Types table.
Disables one or all interrupts. When used with no arguments the global interrupt enable fl ag is
cleared. When used with an interrupt argument, that interrupt’s enable fl ag is cleared. If either the
global interrupt fl ag or the specifi c interrupt fl ag is cleared that interrupt will not trigger.
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