Notes

This module encapsulates a hardware counter that increments continuously at a constant rate. The counter makes up the basis for measuring time. Additionally, this counter and a corresponding interrupt make up the basis for alarms.

Include

Constants

AO_COUNT_FREQUENCY

#define AO_COUNT_FREQUENCY ((AO_SYS_SYSCLK) / 2)

The frequency, in Hertz, at which the counter is incremented.

AO_COUNT_MAX

AO_COUNT_MIN

#define AO_COUNT_MAX (UINT32_MAX)
#define AO_COUNT_MIN (0)

The maximum and minimum counter value, respectively.

Types

ao_count_t

typedef uint32_t ao_count_t;

This type is an alias for the uint32_t unsigned integer type. It is to hold a value of the counter.

Functions

ao_count

#define ao_count()   \
(                    \
    _CP0_GET_COUNT() \
)

Gets the current value of the counter.

ao_count_debug_continue

ao_count_debug_stop

#define ao_count_debug_continue() _CP0_BIS_DEBUG(_CP0_DEBUG_COUNTDM_MASK)
#define ao_count_debug_stop()     _CP0_BIC_DEBUG(_CP0_DEBUG_COUNTDM_MASK)

Sets up the counter to continue or stop, respectively, upon a breakpoint.