SCUTIMER Standalone Driver

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

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

doc

Provides the API and data structure details

data

Driver .tcl and .mdd file

examples

Example applications that show how to use the driver features

src

Driver source files

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
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

2021.1

  • None

2020.2

2020.1

  • None

2019.2

  • None

2017.3

  • None