Conrad C-Control Pro Mega Series, Manual, Page: 160 / 240

151 C-Control Pro Mega Series
© 2008 Conrad Electronic
irqnr specifies the interrupt type (see table )
Return Parameter
The return value expresses how often a interrupt got triggered until the function Irq_GetCount() has been
called. A value greater 1 shows that the interrupts
are triggered more rapidly than the interrupt service routine is processed.
6.9.4 Irq_SetVect
Interrupt Functions Example
Syntax
void Irq_SetVect(byte irqnr,float vect);
Sub Irq_SetVect(irqnr As Byte,vect As Single)
Description
Defines an interrupt service routine for a specified interrupt. At the end of the interrupt service routine the
function
Irq_GetCount () has to be called, otherwise the interrupt service routine gets called continuously.
Parameter
irqnr
specifies the interrupt type (see table )
vect is the name of the interrupt function to be called
Remark
The floating point data type seems not suitable for an interrupt vector, but a 4 byte data type is
needed to specify a function in the Mega128 environment.
6.9.5 IRQ Example
Example: Usage of Interrupt Routines
// normally Timer 2 is called every 10ms. In this example the variable
// cnt gets increased by one every 10ms
int cnt;
void ISR(void)
{
int irqcnt;
cnt=cnt+ 1 ;
irqcnt=Irq_GetCount(INT_TIM2COMP);
}