This page gives an overview of tmrctr driver which is available as part of the Xilinx Vivado and SDK distribution.
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.
Path in Vitis
Path in Github
<Vitis Install Directory>/data/embedded/XilinxProcessorIPLib/drivers/tmrctr
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/tmrctr
The driver source code is organized into different folders. The table below shows the tmrctr driver source organization.
Provides the API and data structure details
Driver .tcl and .mdd file
Example applications that show how to use the driver features
Driver source files
For a full list of features supported by this IP, please refer AXI Timer product guide.
Two identical modules each timer/counter module having two 32/64-bit counters
The timer/counters support polled mode, interrupt driven mode, enabling and disabling specific timers, PWM operation and the cascade mode operation to get a 64-bit timer/counter
Support both increment and decrement counting
Ability to produce output in PWM by using the two timer/counters as a pair with a specified frequency and duty factor
Known issues and Limitations
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
|TMRCTR Interrupt mode examples||This examples demonstrates different tmrctr features using interrupt mode.|
|TMRCTR polled mode examples||This examples does basic read and write test from the flash device in Interrupt mode.|
|TMRCTR Self test example||This example performs a self test to ensure that the hardware was built correctly.|
Example Application Usage
TMRCTR fast interrupt example:
TMRCTR interrupt 64-bit example:
This example initializes a 64-bit timer/counter, which is only in cascade mode and sets it up in the compare mode in the auto reload such that the periodic interrupt is generated.
TMRCTR interrupt example:
This example initializes a timer/counter and sets it up in the compare mode in the auto reload such that the periodic interrupt is generated.
TMRCTR PWM example:
This example demonstrates the use of tmrctr PWM APIs.
TMRCTR low level example:
This example deals with the tmrctr low level API's. It starts the timer/counter such that its incrementing by default in the polled mode and checks if the count is changed.
TMRCTR polled example:
This example enables the auto reload mode and starts the timer/counter such that it starts incrementing in the polled mode and confirms if the count is being changed.
TMRCTR selftest example:
This example performs a self test to ensure that the hardware was built correctly.
2020.1 - 2019.1