Nios® V Processor Software Developer Handbook

ID 743810
Date 2/14/2023
Public

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Document Table of Contents

12.1.1.53. alt_timestamp_freq()

Prototype

alt_u32 alt_timestamp_freq (void)

Commonly Called By

C/C++ programs

Thread-safe

See description.

Available from ISR

See description.

Include

<sys/alt_timestamp.h>

Description

The alt_timestamp_freq() function returns the rate at which the timestamp counter increments.

For more information, refer to “Using Timer Devices” in the "Developing Programs Using the Hardware Abstraction Layer" chapter.

The implementation of this function is provided by the timestamp driver. Therefore, whether this function is thread-safe and or available at interrupt level depends on the underlying driver.

Return

The returned value is the number of counter ticks per second.