1 Introduction
2 Driver Sources
3 Driver Implementation
- 3.1 Features Supported
- 3.2 Known issues and Limitations
4 Example Applications
- 4.1 Links to Examples
- 4.2 Example Application Usage
  - 4.2.1 Polled mode example
  - 4.2.2 Interrupt mode example
5 Changelog
- 5.1 2025.2
- 5.2 2025.1
- 5.3 2024.2
- 5.4 2024.1
- 5.5 2023.2
- 5.6 2023.1
- 5.7 2022.2
- 5.8 2022.1
- 5.9 2021.2
- 5.10 2021.1
- 5.11 2020.2
- 5.12 2020.1
- 5.13 2019.2
- 5.14 2017.3
- 5.15 Related Links

Introduction

This page gives an overview of scutimer driver which is available as part of the Xilinx Vivado and SDK distribution.

Driver Sources

The source code for the driver is included with the Vitis Unified Software Platform installation, as well as being available in the Xilinx Github repository.

Driver Name	Path in Vitis	Path in Github

Driver Name	Path in Vitis	Path in Github
scutimer	<Vitis Install Directory>/data/embedded/XilinxProcessorIPLib/drivers/ospipsv	https://github.com/Xilinx/embeddedsw/tree/master/XilinxProcessorIPLib/drivers/scutimer

Note: To view the sources for a particular release, use the rel-version tag in github. For example, for the 2020.1 release, the proper version of the code is: https://github.com/Xilinx/embeddedsw/tree/release-2020.1/XilinxProcessorIPLib/drivers/scutimer

The driver source code is organized into different folders. The table below shows the scutimer driver source organization.

Directory	Description

Directory	Description
doc	Provides the API and data structure details
data	Driver .tcl , .mdd and .yaml files
examples	Example applications that show how to use the driver features
src	Driver source files, make and cmakelists file

Note: The .yaml(in data folder) and CMakeLists.txt(in src folder) files would be used in System Device Tree based flow.

Driver Implementation

For a full list of features supported by this IP, please refer section 8.2 of Zynq TRM

Features Supported

32-bit counter
8-bit prescaler
can be used in normal mode or auto reload mode
Support both increment and decrement counting
The Timer hardware supports interrupts

Known issues and Limitations

None

Example Applications

Refer to the driver examples directory for various example applications that exercise the different features of the driver. Each application is linked in the table below. The following sections describe the usage and expected output of the various applications. These example applications can be imported into the Vitis IDE from the Board Support Package settings tab.

Links to Examples

Examples Path:

https://github.com/Xilinx/embeddedsw/tree/master/XilinxProcessorIPLib/drivers/scutimer

Test Name	Example Source	Description

Test Name	Example Source	Description
SCUTIMER polled mode example	xscutimer_polled_example.c	This example configures the timer/counter in the polled mode such that count decrements gradually.
SCUTIMER Interrupt mode example	xscutimer_intr_example.c	This example initializes the timer/counter, enables auto reload mode and uses the driver in the interrupt mode.

Example Application Usage

Polled mode example

This example configures the timer/counter in the polled mode such that count decrements gradually.

Expected output

SCU Timer Polled Mode Example Test
Successfully ran SCU Timer Polled Mode Example Test

Interrupt mode example

This example initializes the timer/counter, enables auto reload mode and uses the driver in the interrupt mode.

Expected output

SCU Timer Interrupt Example Test
Successfully ran SCU Timer Interrupt Example Test

Changelog

2025.2

None

2025.1

https://github.com/Xilinx/embeddedsw/blob/xlnx_rel_v2025.1/doc/ChangeLog#L420

2024.2

None

2024.1

https://github.com/Xilinx/embeddedsw/blob/xlnx_rel_v2024.1/doc/ChangeLog#L897

2023.2

https://github.com/Xilinx/embeddedsw/blob/xlnx_rel_v2023.2/doc/ChangeLog#L296

2023.1

None

2022.2

None

2022.1

Add support generic interrupt wrapper.

2021.2

None

2021.1

None

2020.2

https://github.com/Xilinx/embeddedsw/blob/release-2020.2/doc/ChangeLog#L664

2020.1

None

2019.2

None

2017.3

None

SCUTIMER Standalone Driver