timerisr.c File Reference

#include <rtems.h>
#include <rtems/btimer.h>

Functions
void	timerisr (void)

Variables
uint32_t	_Timer_interrupts

Detailed Description

If required this ISR is used to bump a count of interval "overflow" interrupts which have occurred since the timer was started. The number of overflows is taken into account in the benchmark_timer_read() routine if necessary.

To reduce overhead this is best to be the "rawest" hardware interupt handler you can write. This should be the only interrupt which can occur during the measured time period.

Note

This file is USUALLY in assembly and is LEAN AND MEAN. Any code in this isr is pure overhead which can perturb the accuracy of the Timing Test Suite.