void vInitialiseTimerForIntQueueTest( void )
{
BaseType_t xStatus;
TmrCntrSetup *pxTimerSettings;
extern XScuGic xInterruptController;
BaseType_t xTimer;
XTtcPs *pxTimerInstance;
XTtcPs_Config *pxTimerConfiguration;
const uint8_t ucRisingEdge = 3;
for( xTimer = 0; xTimer < tmrTIMERS_USED; xTimer++ )
{
/* Look up the timer's configuration. */
pxTimerInstance = &( xTimerInstances[ xTimer ] );
pxTimerConfiguration = XTtcPs_LookupConfig( xDeviceIDs[ xTimer ] );
configASSERT( pxTimerConfiguration );
pxTimerSettings = &( xTimerSettings[ xTimer ] );
/* Initialise the device. */
xStatus = XTtcPs_CfgInitialize( pxTimerInstance, pxTimerConfiguration, pxTimerConfiguration->BaseAddress );
if( xStatus != XST_SUCCESS )
{
/* Not sure how to do this before XTtcPs_CfgInitialize is called
as pxTimerInstance is set within XTtcPs_CfgInitialize(). */
XTtcPs_Stop( pxTimerInstance );
xStatus = XTtcPs_CfgInitialize( pxTimerInstance, pxTimerConfiguration, pxTimerConfiguration->BaseAddress );
configASSERT( xStatus == XST_SUCCESS );
}
/* Set the options. */
XTtcPs_SetOptions( pxTimerInstance, pxTimerSettings->Options );
/* The timer frequency is preset in the pxTimerSettings structure.
Derive the values for the other structure members. */
XTtcPs_CalcIntervalFromFreq( pxTimerInstance, pxTimerSettings->OutputHz, &( pxTimerSettings->Interval ), &( pxTimerSettings->Prescaler ) );
/* Set the interval and prescale. */
XTtcPs_SetInterval( pxTimerInstance, pxTimerSettings->Interval );
XTtcPs_SetPrescaler( pxTimerInstance, pxTimerSettings->Prescaler );
/* The priority must be the lowest possible. */
XScuGic_SetPriorityTriggerType( &xInterruptController, xInterruptIDs[ xTimer ], uxInterruptPriorities[ xTimer ] << portPRIORITY_SHIFT, ucRisingEdge );
/* Connect to the interrupt controller. */
xStatus = XScuGic_Connect( &xInterruptController, xInterruptIDs[ xTimer ], ( Xil_InterruptHandler ) prvTimerHandler, ( void * ) pxTimerInstance );
configASSERT( xStatus == XST_SUCCESS);
/* Enable the interrupt in the GIC. */
XScuGic_Enable( &xInterruptController, xInterruptIDs[ xTimer ] );
/* Enable the interrupts in the timer. */
XTtcPs_EnableInterrupts( pxTimerInstance, XTTCPS_IXR_INTERVAL_MASK );
/* Start the timer. */
XTtcPs_Start( pxTimerInstance );
}
}
void vConfigureTickInterrupt( void )
{
BaseType_t xStatus;
XTtcPs_Config *pxTimerConfiguration;
uint16_t usInterval;
uint8_t ucPrescale;
const uint8_t ucLevelSensitive = 1;
extern XScuGic xInterruptController;
pxTimerConfiguration = XTtcPs_LookupConfig( XPAR_XTTCPS_3_DEVICE_ID );
/* Initialise the device. */
xStatus = XTtcPs_CfgInitialize( &xRTOSTickTimerInstance, pxTimerConfiguration, pxTimerConfiguration->BaseAddress );
if( xStatus != XST_SUCCESS )
{
/* Not sure how to do this before XTtcPs_CfgInitialize is called as
*xRTOSTickTimerInstance is set within XTtcPs_CfgInitialize(). */
XTtcPs_Stop( &xRTOSTickTimerInstance );
xStatus = XTtcPs_CfgInitialize( &xRTOSTickTimerInstance, pxTimerConfiguration, pxTimerConfiguration->BaseAddress );
configASSERT( xStatus == XST_SUCCESS );
}
/* Set the options. */
XTtcPs_SetOptions( &xRTOSTickTimerInstance, ( XTTCPS_OPTION_INTERVAL_MODE | XTTCPS_OPTION_WAVE_DISABLE ) );
/* Derive values from the tick rate. */
XTtcPs_CalcIntervalFromFreq( &xRTOSTickTimerInstance, configTICK_RATE_HZ, &( usInterval ), &( ucPrescale ) );
/* Set the interval and prescale. */
XTtcPs_SetInterval( &xRTOSTickTimerInstance, usInterval );
XTtcPs_SetPrescaler( &xRTOSTickTimerInstance, ucPrescale );
/* The priority must be the lowest possible. */
XScuGic_SetPriorityTriggerType( &xInterruptController, XPAR_XTTCPS_3_INTR, portLOWEST_USABLE_INTERRUPT_PRIORITY << portPRIORITY_SHIFT, ucLevelSensitive );
/* Connect to the interrupt controller. */
xStatus = XScuGic_Connect( &xInterruptController, XPAR_XTTCPS_3_INTR, (Xil_ExceptionHandler) FreeRTOS_Tick_Handler, ( void * ) &xRTOSTickTimerInstance );
configASSERT( xStatus == XST_SUCCESS);
/* Enable the interrupt in the GIC. */
XScuGic_Enable( &xInterruptController, XPAR_XTTCPS_3_INTR );
/* Enable the interrupts in the timer. */
XTtcPs_EnableInterrupts( &xRTOSTickTimerInstance, XTTCPS_IXR_INTERVAL_MASK );
/* Start the timer. */
XTtcPs_Start( &xRTOSTickTimerInstance );
}
/**
*
* This function sets up a timer counter device, using the information in its
* setup structure.
* . initialize device
* . set options
* . set interval and prescaler value for given output frequency.
*
* @param DeviceID is the unique ID for the device.
*
* @return XST_SUCCESS if successful, otherwise XST_FAILURE.
*
* @note None.
*
*****************************************************************************/
int SetupTimer(int DeviceID)
{
int Status;
XTtcPs_Config *Config;
XTtcPs *Timer;
TmrCntrSetup *TimerSetup;
TimerSetup = &SettingsTable[DeviceID];
Timer = &(TtcPsInst[DeviceID]);
/*
* Stop the timer first
*/
XTtcPs_Stop(Timer);
/*
* Look up the configuration based on the device identifier
*/
Config = XTtcPs_LookupConfig(DeviceID);
if (NULL == Config) {
return XST_FAILURE;
}
/*
* Initialize the device
*/
Status = XTtcPs_CfgInitialize(Timer, Config, Config->BaseAddress);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Set the options
*/
XTtcPs_SetOptions(Timer, TimerSetup->Options);
/*
* Timer frequency is preset in the TimerSetup structure,
* however, the value is not reflected in its other fields, such as
* IntervalValue and PrescalerValue. The following call will map the
* frequency to the interval and prescaler values.
*/
XTtcPs_CalcIntervalFromFreq(Timer, TimerSetup->OutputHz,
&(TimerSetup->Interval), &(TimerSetup->Prescaler));
/*
* Set the interval and prescale
*/
XTtcPs_SetInterval(Timer, TimerSetup->Interval);
XTtcPs_SetPrescaler(Timer, TimerSetup->Prescaler);
return XST_SUCCESS;
}
/*
* The application must provide a function that configures a peripheral to
* create the FreeRTOS tick interrupt, then define configSETUP_TICK_INTERRUPT()
* in FreeRTOSConfig.h to call the function. This file contains a function
* that is suitable for use on the Zynq SoC.
*/
void vConfigureTickInterrupt( void )
{
XTtcPs_Config *pxTimerConfig;
BaseType_t xStatus;
XScuGic_Config *pxGICConfig;
static XScuGic xInterruptController; /* Interrupt controller instance */
uint16_t usInterval;
uint8_t ucPrescale = 0;
const uint8_t ucRisingEdge = 3;
/* This function is called with the IRQ interrupt disabled, and the IRQ
interrupt should be left disabled. It is enabled automatically when the
scheduler is started. */
/* Ensure XScuGic_CfgInitialize() has been called. In this demo it has
already been called from prvSetupHardware() in main(). */
pxGICConfig = XScuGic_LookupConfig( XPAR_SCUGIC_SINGLE_DEVICE_ID );
xStatus = XScuGic_CfgInitialize( &xInterruptController, pxGICConfig, pxGICConfig->CpuBaseAddress );
configASSERT( xStatus == XST_SUCCESS );
( void ) xStatus; /* Remove compiler warning if configASSERT() is not defined. */
/* The interrupt priority must be the lowest possible. */
XScuGic_SetPriorityTriggerType( &xInterruptController, tickINTERRUPT_ID, portLOWEST_USABLE_INTERRUPT_PRIORITY << portPRIORITY_SHIFT, ucRisingEdge );
/* Install the FreeRTOS tick handler. */
xStatus = XScuGic_Connect( &xInterruptController, tickINTERRUPT_ID, (Xil_ExceptionHandler) FreeRTOS_Tick_Handler, NULL );
configASSERT( xStatus == XST_SUCCESS );
( void ) xStatus; /* Remove compiler warning if configASSERT() is not defined. */
/* Initialise the Triple Timer Counter (TTC) that is going to be used to
generate the tick interrupt. */
pxTimerConfig = XTtcPs_LookupConfig( tickTTC_ID );
xStatus = XTtcPs_CfgInitialize( &xTimerInstance, pxTimerConfig, pxTimerConfig->BaseAddress );
configASSERT( xStatus == XST_SUCCESS );
( void ) xStatus; /* Remove compiler warning if configASSERT() is not defined. */
/* Configure the interval to be the require tick rate. */
XTtcPs_CalcIntervalFromFreq( &xTimerInstance, configTICK_RATE_HZ, &usInterval, &ucPrescale );
XTtcPs_SetInterval( &xTimerInstance, usInterval );
XTtcPs_SetPrescaler( &xTimerInstance, ucPrescale );
/* Interval mode used. */
XTtcPs_SetOptions( &xTimerInstance, XTTCPS_OPTION_INTERVAL_MODE | XTTCPS_OPTION_WAVE_DISABLE );
/* Start the timer. */
XTtcPs_Start( &xTimerInstance );
/* Enable the interrupt in the interrupt controller. */
XScuGic_Enable( &xInterruptController, tickINTERRUPT_ID );
/* Enable the interrupt in the timer itself. */
XTtcPs_EnableInterrupts( &xTimerInstance, XTTCPS_IXR_INTERVAL_MASK );
}
void platform_setup_timer(void)
{
int Status;
XTtcPs * Timer = &TimerInstance;
XTtcPs_Config *Config;
Config = XTtcPs_LookupConfig(TIMER_DEVICE_ID);
Status = XTtcPs_CfgInitialize(Timer, Config, Config->BaseAddress);
if (Status != XST_SUCCESS) {
xil_printf("In %s: Timer Cfg initialization failed...\r\n",
__func__);
return;
}
XTtcPs_SetOptions(Timer, XTTCPS_OPTION_INTERVAL_MODE | XTTCPS_OPTION_WAVE_DISABLE);
XTtcPs_CalcIntervalFromFreq(Timer, PLATFORM_TIMER_INTR_RATE_HZ, &Interval, &Prescaler);
XTtcPs_SetInterval(Timer, Interval);
XTtcPs_SetPrescaler(Timer, Prescaler);
}
void FreeRTOS_SetupTickInterrupt( void )
{
BaseType_t xStatus;
XTtcPs_Config *pxTimerConfiguration;
XInterval usInterval;
uint8_t ucPrescale;
const uint8_t ucLevelSensitive = 1;
XScuGic_Config *pxInterruptControllerConfig;
/* Initialize the interrupt controller driver. */
pxInterruptControllerConfig = XScuGic_LookupConfig( configINTERRUPT_CONTROLLER_DEVICE_ID );
XScuGic_CfgInitialize( &xInterruptController,
pxInterruptControllerConfig,
pxInterruptControllerConfig->CpuBaseAddress );
/* Connect the interrupt controller interrupt handler to the hardware
interrupt handling logic in the ARM processor. */
Xil_ExceptionRegisterHandler( XIL_EXCEPTION_ID_IRQ_INT,
( Xil_ExceptionHandler ) XScuGic_InterruptHandler,
&xInterruptController);
/* Enable interrupts in the ARM. */
Xil_ExceptionEnable();
pxTimerConfiguration = XTtcPs_LookupConfig( configTIMER_ID );
/* Initialise the device. */
xStatus = XTtcPs_CfgInitialize( &xTimerInstance, pxTimerConfiguration, pxTimerConfiguration->BaseAddress );
if( xStatus != XST_SUCCESS )
{
/* Not sure how to do this before XTtcPs_CfgInitialize is called as
*xRTOSTickTimerInstance is set within XTtcPs_CfgInitialize(). */
XTtcPs_Stop( &xTimerInstance );
xStatus = XTtcPs_CfgInitialize( &xTimerInstance, pxTimerConfiguration, pxTimerConfiguration->BaseAddress );
configASSERT( xStatus == XST_SUCCESS );
}
/* Set the options. */
XTtcPs_SetOptions( &xTimerInstance, ( XTTCPS_OPTION_INTERVAL_MODE | XTTCPS_OPTION_WAVE_DISABLE ) );
/* Derive values from the tick rate. */
XTtcPs_CalcIntervalFromFreq( &xTimerInstance, configTICK_RATE_HZ, &( usInterval ), &( ucPrescale ) );
/* Set the interval and prescale. */
XTtcPs_SetInterval( &xTimerInstance, usInterval );
XTtcPs_SetPrescaler( &xTimerInstance, ucPrescale );
/* The priority must be the lowest possible. */
XScuGic_SetPriorityTriggerType( &xInterruptController, configTIMER_INTERRUPT_ID, portLOWEST_USABLE_INTERRUPT_PRIORITY << portPRIORITY_SHIFT, ucLevelSensitive );
/* Connect to the interrupt controller. */
XScuGic_Connect( &xInterruptController,
configTIMER_INTERRUPT_ID,
( Xil_InterruptHandler ) FreeRTOS_Tick_Handler,
( void * ) &xTimerInstance );
/* Enable the interrupt in the GIC. */
XScuGic_Enable( &xInterruptController, configTIMER_INTERRUPT_ID );
/* Enable the interrupts in the timer. */
XTtcPs_EnableInterrupts( &xTimerInstance, XTTCPS_IXR_INTERVAL_MASK );
/* Start the timer. */
XTtcPs_Start( &xTimerInstance );
}