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/****************************************************************************/
/**
*
* @file xrtcpsu_seconds_intr_example.c
*
* This file contains an seconds example using the XRtcPsu driver in interrupt
* mode.
*
*
* @note
* In the example,if interrupts are not working it may hang.
*
* MODIFICATION HISTORY:
*
* Ver Who Date Changes
* ----- ------ -------- ----------------------------------------------
* 1.00 kvn 05/12/15 First Release
*
*
****************************************************************************/
/***************************** Include Files *******************************/
#include "xparameters.h" /* SDK generated parameters */
#include "xrtcpsu.h" /* RTCPSU device driver */
#include "xscugic.h" /* Interrupt controller device driver */
#include "xil_exception.h"
#include "xil_printf.h"
/************************** Constant Definitions **************************/
/*
* The following constants map to the XPAR parameters created in the
* xparameters.h file. They are defined here such that a user can easily
* change all the needed parameters in one place.
*/
#define RTC_DEVICE_ID XPAR_XRTCPSU_0_DEVICE_ID
#define INTC_DEVICE_ID XPAR_SCUGIC_SINGLE_DEVICE_ID
#define RTC_SEC_INT_IRQ_ID XPAR_XRTCPSU_SECONDS_INTR
/**************************** Type Definitions ******************************/
/***************** Macros (Inline Functions) Definitions *********************/
#define REPETATIONS 10
/************************** Function Prototypes *****************************/
int RtcPsuSecondsIntrExample(XScuGic *IntcInstPtr, XRtcPsu *RtcInstPtr,
u16 DeviceId, u16 RtcIntrId);
static int SetupInterruptSystem(XScuGic *IntcInstancePtr,
XRtcPsu *RtcInstancePtr,
u16 RtcIntrId);
void Handler(void *CallBackRef, u32 Event);
/************************** Variable Definitions ***************************/
XRtcPsu RtcPsu; /* Instance of the RTC Device */
XScuGic InterruptController; /* Instance of the Interrupt Controller */
u32 Seconds = 0;
/**************************************************************************/
/**
*
* Main function to call the RTC Seconds interrupt example.
*
* @param None
*
* @return XST_SUCCESS if successful, XST_FAILURE if unsuccessful
*
* @note None
*
**************************************************************************/
#ifndef TESTAPP_GEN
int main(void)
{
int Status;
/* Run the RtcPsu Interrupt example, specify the the Device ID */
Status = RtcPsuSecondsIntrExample(&InterruptController, &RtcPsu,
RTC_DEVICE_ID, RTC_SEC_INT_IRQ_ID);
if (Status != XST_SUCCESS) {
xil_printf("RTC Seconds Interrupt Example Test Failed\r\n");
return XST_FAILURE;
}
xil_printf("Successfully ran RTC Seconds Interrupt Example Test\r\n");
return XST_SUCCESS;
}
#endif
/**************************************************************************/
/**
*
* This function does a minimal test on the Rtc device and driver as a
* design example. The purpose of this function is to illustrate
* how to seconds feature is available in the XRtcPsu driver.
*
* This function shows the seconds interrupt feature..
*
* @param IntcInstPtr is a pointer to the instance of the ScuGic driver.
* @param RtcInstPtr is a pointer to the instance of the RTC driver
* which is going to be connected to the interrupt controller.
* @param DeviceId is the device Id of the RTC device and is typically
* XPAR__DEVICE_ID value from xparameters.h.
* @param RtcIntrId is the interrupt Id and is typically
* XPAR__INTR value from xparameters.h.
*
* @return XST_SUCCESS if successful, otherwise XST_FAILURE.
*
* @note
*
* In this function ,if interrupts are not working it may never return.
*
**************************************************************************/
int RtcPsuSecondsIntrExample(XScuGic *IntcInstPtr, XRtcPsu *RtcInstPtr,
u16 DeviceId, u16 RtcIntrId)
{
int Status;
XRtcPsu_Config *Config;
/*
* Initialize the RTC driver so that it's ready to use
* Look up the configuration in the config table, then initialize it.
*/
Config = XRtcPsu_LookupConfig(DeviceId);
if (NULL == Config) {
return XST_FAILURE;
}
Status = XRtcPsu_CfgInitialize(RtcInstPtr, Config, Config->BaseAddr);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
/* Check hardware build */
Status = XRtcPsu_SelfTest(RtcInstPtr);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Connect the RTC to the interrupt subsystem such that interrupts
* can occur. This function is application specific.
*/
Status = SetupInterruptSystem(IntcInstPtr, RtcInstPtr, RtcIntrId);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Setup the handlers for the RTC that will be called from the
* interrupt context when alarm and seconds interrupts are raised,
* specify a pointer to the RTC driver instance as the callback reference
* so the handlers are able to access the instance data
*/
XRtcPsu_SetHandler(RtcInstPtr, (XRtcPsu_Handler)Handler, RtcInstPtr);
/*
* Enable the interrupt of the RTC device so interrupts will occur.
*/
XRtcPsu_SetInterruptMask(RtcInstPtr,XRTC_INT_EN_SECS_MASK);
while( Seconds != REPETATIONS);
/*
* Disable the interrupt of the RTC device so interrupts will not occur.
*/
XRtcPsu_ClearInterruptMask(RtcInstPtr,XRTC_INT_DIS_SECS_MASK);
return XST_SUCCESS;
}
/**************************************************************************/
/**
*
* This function is the handler which performs processing to handle interrupt
* events from the device. It is called from an interrupt context. so the
* amount of processing should be minimal.
*
* This handler provides an example of how to handle interrupt data for the
* device and is application specific.
*
* @param CallBackRef contains a callback reference from the driver,
* in this case it is the instance pointer for the XRtcPsu driver.
* @param Event contains the specific kind of event that has occurred.
*
* @return None.
*
* @note None.
*
***************************************************************************/
void Handler(void *CallBackRef, u32 Event)
{
/* A new second event */
if (Event == XRTCPSU_EVENT_SECS_GEN) {
Seconds++;
xil_printf("A new second is generated.\n\r");
}
}
/*****************************************************************************/
/**
*
* This function sets up the interrupt system so interrupts can occur for the
* RTC. This function is application-specific. The user should modify this
* function to fit the application.
*
* @param IntcInstancePtr is a pointer to the instance of the INTC.
* @param RtcInstancePtr contains a pointer to the instance of the RTC
* driver which is going to be connected to the interrupt
* controller.
* @param RtcIntrId is the interrupt Id and is typically
* XPAR__INTR value from xparameters.h.
*
* @return XST_SUCCESS if successful, otherwise XST_FAILURE.
*
* @note None.
*
****************************************************************************/
static int SetupInterruptSystem(XScuGic *IntcInstancePtr,
XRtcPsu *RtcInstancePtr,
u16 RtcIntrId)
{
int Status;
#ifndef TESTAPP_GEN
XScuGic_Config *IntcConfig; /* Config for interrupt controller */
/* Initialize the interrupt controller driver */
IntcConfig = XScuGic_LookupConfig(INTC_DEVICE_ID);
if (NULL == IntcConfig) {
return XST_FAILURE;
}
Status = XScuGic_CfgInitialize(IntcInstancePtr, IntcConfig,
IntcConfig->CpuBaseAddress);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Connect the interrupt controller interrupt handler to the
* hardware interrupt handling logic in the processor.
*/
Xil_ExceptionRegisterHandler(XIL_EXCEPTION_ID_INT,
(Xil_ExceptionHandler) XScuGic_InterruptHandler,
IntcInstancePtr);
#endif
/*
* Connect a device driver handler that will be called when an
* interrupt for the device occurs, the device driver handler
* performs the specific interrupt processing for the device
*/
Status = XScuGic_Connect(IntcInstancePtr, RtcIntrId,
(Xil_ExceptionHandler) XRtcPsu_InterruptHandler,
(void *) RtcInstancePtr);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
/* Enable the interrupt for the device */
XScuGic_Enable(IntcInstancePtr, RtcIntrId);
#ifndef TESTAPP_GEN
/* Enable interrupts */
Xil_ExceptionEnable();
#endif
return XST_SUCCESS;
}