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Table of Contents

Introduction


This page gives an overview of scutimer driver which is available as part of the Xilinx Vivado and SDK distribution.
Source path for the driver:
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/release-2020.1/XilinxProcessorIPLib/drivers/scutimer



Info

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/

master

release-2020.1/XilinxProcessorIPLib/drivers/scutimer

Driver



The driver source code is organized into different folders.

Below diagram

  The table below shows the scutimer driver source organization. 

scutimer


Directory
Description
|

doc

-- Doc -

Provides the API and data structure details


|
- Examples - Reference application to

data

Driver .tcl and .mdd file

examples

Example applications that show how to use the driver

APIs and calling sequence
|
- Source -

features

src

Driver source files

Features Supported


Controller/Driver features supported

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

  • noneNone

Test cases

Polled mode example


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/

blob

tree/master/XilinxProcessorIPLib/drivers/scutimer

/examples/

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
, It illustrates the decrements in the counter value.
Output
.
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
Code Block
themeMidnight
SCU Timer Polled Mode Example Test
Successfully ran SCU Timer Polled Mode Example Test

Interrupt mode example

https://github.com/Xilinx/embeddedsw/blob/master/XilinxProcessorIPLib/drivers/scutimer/examples/xscutimer_intr_

example

.c


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

OutputExpected output
Code Block
themeMidnight
SCU Timer Interrupt Example Test
Successfully ran SCU Timer Interrupt Example Test

Changelog

2021.1

  • None

2020.2

  • Updated makefile for parallel make execution and incremental build support.

2020.1

  • None

2019.2

  • None

2017.3

  • None