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tmrctr
Xilinx SDK Drivers API Documentation
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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.
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Functions | |
int | TmrCtrCascadeIntrExample (XIntc *IntcInstancePtr, XTmrCtr *TmrCtrInstancePtr, u16 DeviceId, u16 IntrId) |
This function does a minimal test on the timer counter device and driver as a design example. More... | |
void | TimerCounterHandler (void *CallBackRef, u8 TmrCtrNumber) |
This function is the handler which performs processing for the timer counter. More... | |
void | TmrCtrDisableIntr (XIntc *IntcInstancePtr, u16 IntrId) |
This function disables the interrupts for the Timer. More... | |
int | main (void) |
This function is the main function of the Tmrctr 64 bit example using Interrupts. More... | |
int main | ( | void | ) |
This function is the main function of the Tmrctr 64 bit example using Interrupts.
None. |
- XST_SUCCESS to indicate success - XST_FAILURE to indicate a failure.
References TmrCtrCascadeIntrExample().
void TimerCounterHandler | ( | void * | CallBackRef, |
u8 | TmrCtrNumber | ||
) |
This function is the handler which performs processing for the timer counter.
It is called from an interrupt context such that the amount of processing performed should be minimized. It is called when the timer counter expires if interrupts are enabled.
This handler provides an example of how to handle timer counter interrupts but is application specific.
CallBackRef | is a pointer to the callback function |
TmrCtrNumber | is the number of the timer to which this handler is associated with. |
References XTmrCtr_IsExpired().
int TmrCtrCascadeIntrExample | ( | XIntc * | IntcInstancePtr, |
XTmrCtr * | TmrCtrInstancePtr, | ||
u16 | DeviceId, | ||
u16 | IntrId | ||
) |
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.
IntcInstancePtr | is a pointer to the Interrupt Controller driver Instance |
TmrCtrInstancePtr | is a pointer to the XTmrCtr driver Instance |
DeviceId | is the XPAR_<TmrCtr_instance>_DEVICE_ID value from xparameters.h |
IntrId | is XPAR_<INTC_instance>_<TmrCtr_instance>_VEC_ID value from xparameters.h |
References XTmrCtr_Initialize(), and XTmrCtr_SelfTest().
Referenced by main().
void TmrCtrDisableIntr | ( | XIntc * | IntcInstancePtr, |
u16 | IntrId | ||
) |
This function disables the interrupts for the Timer.
IntcInstancePtr | is a reference to the Interrupt Controller driver Instance. |
IntrId | is XPAR_<INTC_instance>_<Timer_instance>_VEC_ID value from xparameters.h. |