Overview

This file contains a design example using the timer counter driver (XTmCtr) and hardware device using interrupt mode with the counters configured in cascasde mode for a 64 bit operation.

Both the timers should enabled in HW configuration for the cascade mode of operation.

The cascade mode of operation is present in the new versions of the axi_timer IP. Please check the HW Datasheet to see whether this feature is present in the version of the IP that you are using.

This example assumes that the interrupt controller is also present as a part of the system.

 MODIFICATION HISTORY:

 Ver   Who  Date         Changes



 2.04a sdm  07/15/11 Created based on the xtmrctr_intr_example
 4.2   ms   01/23/17 Added xil_printf statement in main function to
                     ensure that "Successfully ran" and "Failed" strings
                     are available in all examples. This is a fix for
                     CR-965028.
 4.5   mus  07/05/18 Updated example to call TmrCtrDisableIntr function
                     with correct arguments. Presently device id is
                     being passed instead of interrupt id. It fixes
                     CR#1006251.
 4.5   mus  07/05/18 Fixed checkpatch errors and warnings.
 4.12  ml   12/07/23 Make TimerExpired as a static variable.
 4.15  bdk  12/08/25 Updated comments to support SDT flow for Doxygen
                     documentation.
 4.15  vmt  12/16/25 Updated reset values to reduce interrupt interval.

#include "xtmrctr.h"
#include "xil_exception.h"
#include "xil_printf.h"
#include "xparameters.h"
#include "xinterrupt_wrap.h"

Functions
int	TmrCtrCascadeIntrExample (XTmrCtr *TmrCtrInstancePtr, UINTPTR BaseAddr)
	This function does a minimal test on the timer counter device and driver as a design example. More...

int	main (void)
	This function is the main function of the Tmrctr 64 bit example using Interrupts. More...

Function Documentation

int main ( void )

This function is the main function of the Tmrctr 64 bit example using Interrupts.

Parameters

None.

Returns

    - XST_SUCCESS to indicate success
    - XST_FAILURE to indicate a failure.

Note: None.

References TmrCtrCascadeIntrExample().

int TmrCtrCascadeIntrExample	(	XTmrCtr *	TmrCtrInstancePtr,
		UINTPTR	BaseAddr
	)

This function does a minimal test on the timer counter device and driver as a design example.

The purpose of this function is to illustrate how to use the XTmrCtr driver in cascade mode of operation. It initializes a timer counter and then sets it up in compare mode with auto reload such that a periodic interrupt is generated.

This function uses interrupt driven mode of the timer counter.

Parameters

TmrCtrInstancePtr	is a pointer to the XTmrCtr driver Instance
BaseAddr	is the base address of the XTmrCtr device.

Returns

XST_SUCCESS if the Test is successful.
XST_FAILURE if the Test is Not Successful.

Note: In XSCT/classic flow, DeviceId is used to look up the device configuration. This function contains an infinite loop such that if interrupts are not working it may never return.

References XTmrCtr::Config, XTC_CASCADE_MODE_OPTION, XTmrCtr_Initialize(), XTmrCtr_InterruptHandler(), XTmrCtr_Reset(), XTmrCtr_SelfTest(), XTmrCtr_SetHandler(), XTmrCtr_SetOptions(), XTmrCtr_SetResetValue(), XTmrCtr_Start(), and XTmrCtr_Stop().

Referenced by main().

Overview

Functions

Function Documentation