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Introduction
This page gives an overview of ttcps driver which is available as part of the Xilinx Vivado and SDK distributionSource path for the driver:
https://github.com/Xilinx/embeddedsw/tree/master/XilinxProcessorIPLib/drivers/ttcps
Driver source code is organized into different folders. Below diagram shows the ttcps driver source organization
ttcps
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-- Doc - Provides the API and data structure details
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- Examples - Reference application to show how to use the driver APIs and calling sequence
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- Source - Driver source files
Features Supported
Controller/Driver features supported
- Three independent 32-bit timer/counters for ZynqMP/Versal and 16-bit timer/counter for Zynq
- Clock can be selected from:
- Internal PS bus clock (CPU_1x)
- Internal clock (from PL)
- External clock (from MIO)
- 16-bit pre-scalar for clock
- Three interrupts, one for each counter
- Support both increment and decrement counting
- Interrupt on overflow, at regular interval, or counter matching programmable values
- Ability to generate waveform output (e.g. PWM) through the MIO
- Support waveform output to the PL
Known issues and Limitations
- None
Test cases
TTC interrupt example:
https://github.com/Xilinx/embeddedsw/blob/master/XilinxProcessorIPLib/drivers/ttcps/examples/xttcps_intr_example.cThis example uses two timer counters in the Triple Timer Counter (TTC) module in the Ps block in interrupt mode.
Output
| Code Block | ||
|---|---|---|
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TTC Interrupt Example Test Successfully ran TTC Interrupt Example Test |
TTC rtc example:
https://github.com/Xilinx/embeddedsw/blob/master/XilinxProcessorIPLib/drivers/ttcps/examples/xttcps_rtc_example.cThis example uses one timer/counter to make a real time clock. The number of seconds elapsed are displayed on
the console till 121 seconds are elapsed.
Output
| Code Block | ||
|---|---|---|
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Starting Timer RTC Example Successfully ran ttcps rtc Example |
TTC low level example:
https://github.com/Xilinx/embeddedsw/blob/master/XilinxProcessorIPLib/drivers/ttcps/examples/xttcps_low_level_example.cThis example uses triple timer counter in polled mode to generate square wave output on waveform out pin.
Output
| Code Block | ||
|---|---|---|
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TTC Lowlevel Interrupt Example Test Successfully ran Lowlevel TTC Interrupt Example Test |
TTC tapp example:
https://github.com/Xilinx/embeddedsw/blob/master/XilinxProcessorIPLib/drivers/ttcps/examples/xttcps_tapp_example.cThis example uses triple timer counter to generate interrupt and update a flag which is checked in the interrupt example to confirm whether the interrupt is generated or not.
Output
| Code Block | ||
|---|---|---|
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Starting Timer interrupt Example Successfully ran ttcps tapp Example |
Changelog
2020.2
- Updated makefile for parallel make execution and incremental build support.
2020.1
- Fixed the warnings reported by ARMCC compiler
2019.2
- Added interrupt handler in driver. Updated examples to use driver's interrupt handler.
2019.1
- Fixed bug in XTtcPs_ClearInterruptStatus function
2018.3
- Fixed bug in XTtcPs_CalcIntervalFromFreq API to use correct maximum interval count (32 bit) for ZynqMP .
2017.3
- Updated ttcps.tcl to append 'U' to all constant definitions exported from the ttcps driver to the xparameters.h
2017.2
- No changes for 2017.2
2017.1
- Updated the ttcps.tcl script to generate the canonical names and constant defines in xparameters.h, based on the ttcps instance number.
- Updated ttcps_tapp.tcl to check whether ttc device is interrupting current processor or not.If device is not interrupting the current processor then,do not include ttc driver instance and interrupt example source/header files to peripheral test application.
- Updated gen_testfunc_call proc in ttcps_tapp.tcl script, to fix bug in the instance number calculation
2016.4
- Modified XTtcPs_GetCounterValue,XTtcPs_GetInterval and XTtcPs_CalcIntervalFromFreq functions to use 32 bit counter/interval values for Zynq Ultrascale+ MPSoC
2016.3
- No changes for 2016.3