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Comment the new MicroBlaze blinky demo ready for release. The full demo still requires work.

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This commit is contained in:
Richard Barry 2011-06-29 15:02:10 +00:00
parent 832bbd38e1
commit 5fdee187d4
2 changed files with 114 additions and 78 deletions
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21
Demo/MicroBlaze_Spartan-6_EthernetLite/SDKProjects/RTOSDemoSource/FreeRTOSConfig.h
View file

@ -54,8 +54,9 @@
/* The following #error directive is to remind users that a batch file must be /* The following #error directive is to remind users that a batch file must be
* executed prior to this project being built. The batch file *cannot* be * executed prior to this project being built. The batch file *cannot* be
* executed from within CCS4! Once it has been executed, re-open or refresh * executed from within older versions of Eclipse, but probably can be executed
* the CCS4 project and remove the #error line below. * from within the Xilinx SDK. Once it has been executed, re-open or refresh
* the Eclipse project and remove the #error line below.
*/ */
//#error Ensure CreateProjectDirectoryStructure.bat has been executed before building. See comment immediately above. //#error Ensure CreateProjectDirectoryStructure.bat has been executed before building. See comment immediately above.
@ -74,11 +75,10 @@
* *
* See http://www.freertos.org/a00110.html. * See http://www.freertos.org/a00110.html.
*----------------------------------------------------------*/ *----------------------------------------------------------*/
#define configUSE_PREEMPTION 1 #define configUSE_PREEMPTION 1
#define configUSE_IDLE_HOOK 1 #define configUSE_IDLE_HOOK 1
#define configUSE_TICK_HOOK 0 #define configUSE_TICK_HOOK 0
#define configCPU_CLOCK_HZ ( XPAR_MICROBLAZE_CORE_CLOCK_FREQ_HZ ) /* Not actually used in this demo as the timer is set up in main and uses the peripheral clock, not the CPU clock. */ #define configCPU_CLOCK_HZ ( XPAR_MICROBLAZE_CORE_CLOCK_FREQ_HZ ) /* Not actually used in this demo as the timer is set up in main() and uses the peripheral clock, not the CPU clock. */
#define configTICK_RATE_HZ ( ( portTickType ) 1000 ) #define configTICK_RATE_HZ ( ( portTickType ) 1000 )
#define configMAX_PRIORITIES ( ( unsigned portBASE_TYPE ) 6 ) #define configMAX_PRIORITIES ( ( unsigned portBASE_TYPE ) 6 )
#define configTOTAL_HEAP_SIZE ( ( size_t ) ( 64 * 1024 ) ) #define configTOTAL_HEAP_SIZE ( ( size_t ) ( 64 * 1024 ) )
@ -96,8 +96,19 @@
#define configUSE_COUNTING_SEMAPHORES 1 #define configUSE_COUNTING_SEMAPHORES 1
#define configMINIMAL_STACK_SIZE ( ( unsigned short ) 200 ) #define configMINIMAL_STACK_SIZE ( ( unsigned short ) 200 )
#define configINTERRUPT_STACK_SIZE configMINIMAL_STACK_SIZE #define configINTERRUPT_STACK_SIZE configMINIMAL_STACK_SIZE
/* If configINSTALL_EXCEPTION_HANDLERS is set to 1, then the kernel will
automatically install its own exception handlers before the kernel is started,
if the application writer has not already caused them to be installed using the
vPortExceptionsInstallHandlers() API function. See the documentation page for
this demo on the FreeRTOS.org web site for more information. */
#define configINSTALL_EXCEPTION_HANDLERS 1 #define configINSTALL_EXCEPTION_HANDLERS 1
/* configINTERRUPT_CONTROLLER_TO_USE must be set to the ID of the interrupt
controller that is going to be used directly by FreeRTOS itself. Most hardware
designs will only include on interrupt controller. */
#define configINTERRUPT_CONTROLLER_TO_USE XPAR_INTC_SINGLE_DEVICE_ID
/* Co-routine definitions. */ /* Co-routine definitions. */
#define configUSE_CO_ROUTINES 0 #define configUSE_CO_ROUTINES 0
#define configMAX_CO_ROUTINE_PRIORITIES ( 2 ) #define configMAX_CO_ROUTINE_PRIORITIES ( 2 )
@ -120,7 +131,7 @@ to exclude the API function. */
#define configASSERT( x ) if( ( x ) == 0 ) { portDISABLE_INTERRUPTS(); for( ;; ); } #define configASSERT( x ) if( ( x ) == 0 ) { portDISABLE_INTERRUPTS(); for( ;; ); }
#define configINTERRUPT_CONTROLLER_TO_USE XPAR_INTC_SINGLE_DEVICE_ID
#endif /* FREERTOS_CONFIG_H */ #endif /* FREERTOS_CONFIG_H */

171
Demo/MicroBlaze_Spartan-6_EthernetLite/SDKProjects/RTOSDemoSource/main-blinky.c
View file

@ -65,7 +65,9 @@
* one queue, and one timer. It also demonstrates how MicroBlaze interrupts * one queue, and one timer. It also demonstrates how MicroBlaze interrupts
* can interact with FreeRTOS tasks/timers. * can interact with FreeRTOS tasks/timers.
* *
* This simple demo project runs on the Spartan-6 SP605 development board. * This simple demo project was developed and tested on the Spartan-6 SP605
* development board, using the hardware configuration found in the hardware
* project that is already included in the Eclipse project.
* *
* The idle hook function: * The idle hook function:
* The idle hook function demonstrates how to query the amount of FreeRTOS heap * The idle hook function demonstrates how to query the amount of FreeRTOS heap
@ -87,8 +89,8 @@
* in this file. prvQueueReceiveTask() sits in a loop that causes it to * in this file. prvQueueReceiveTask() sits in a loop that causes it to
* repeatedly attempt to read data from the queue that was created within * repeatedly attempt to read data from the queue that was created within
* main(). When data is received, the task checks the value of the data, and * main(). When data is received, the task checks the value of the data, and
* if the value equals the expected 100, toggles the green LED. The 'block * if the value equals the expected 100, toggles an LED. The 'block time'
* time' parameter passed to the queue receive function specifies that the task * parameter passed to the queue receive function specifies that the task
* should be held in the Blocked state indefinitely to wait for data to be * should be held in the Blocked state indefinitely to wait for data to be
* available on the queue. The queue receive task will only leave the Blocked * available on the queue. The queue receive task will only leave the Blocked
* state when the queue send task writes to the queue. As the queue send task * state when the queue send task writes to the queue. As the queue send task
@ -97,7 +99,7 @@
* every 200 milliseconds. * every 200 milliseconds.
* *
* The LED Software Timer and the Button Interrupt: * The LED Software Timer and the Button Interrupt:
* The user button SW1 is configured to generate an interrupt each time it is * The user buttons are configured to generate an interrupt each time one is
* pressed. The interrupt service routine switches an LED on, and resets the * pressed. The interrupt service routine switches an LED on, and resets the
* LED software timer. The LED timer has a 5000 millisecond (5 second) period, * LED software timer. The LED timer has a 5000 millisecond (5 second) period,
* and uses a callback function that is defined to just turn the LED off again. * and uses a callback function that is defined to just turn the LED off again.
@ -111,7 +113,7 @@
#include "queue.h" #include "queue.h"
#include "timers.h" #include "timers.h"
/* BSP includes. */ /* BSP includes. *///_RB_ which of these can be removed?
#include "xenv_standalone.h" #include "xenv_standalone.h"
#include "xtmrctr.h" #include "xtmrctr.h"
#include "xil_exception.h" #include "xil_exception.h"
@ -124,19 +126,22 @@
/* The rate at which data is sent to the queue, specified in milliseconds, and /* The rate at which data is sent to the queue, specified in milliseconds, and
converted to ticks using the portTICK_RATE_MS constant. */ converted to ticks using the portTICK_RATE_MS constant. */
#define mainQUEUE_SEND_FREQUENCY_MS ( 1000 / portTICK_RATE_MS ) //_RB_ should be 200 #define mainQUEUE_SEND_FREQUENCY_MS ( 200 / portTICK_RATE_MS )
/* The number of items the queue can hold. This is 1 as the receive task /* The number of items the queue can hold. This is 1 as the receive task
will remove items as they are added, meaning the send task should always find will remove items as they are added because it has the higher priority, meaning
the queue empty. */ the send task should always find the queue empty. */
#define mainQUEUE_LENGTH ( 1 ) #define mainQUEUE_LENGTH ( 1 )
/* The LED toggle by the queue receive task. */ /* The LED toggled by the queue receive task. */
#define mainTASK_CONTROLLED_LED 0x01UL #define mainTASK_CONTROLLED_LED 0x01UL
/* The LED turned on by the button interrupt, and turned off by the LED timer. */ /* The LED turned on by the button interrupt, and turned off by the LED timer. */
#define mainTIMER_CONTROLLED_LED 0x02UL #define mainTIMER_CONTROLLED_LED 0x02UL
/* A block time of 0 simply means, "don't block". */
#define mainDONT_BLOCK ( portTickType ) 0
/*-----------------------------------------------------------*/ /*-----------------------------------------------------------*/
/* /*
@ -156,11 +161,17 @@ static void prvQueueSendTask( void *pvParameters );
*/ */
static void vLEDTimerCallback( xTimerHandle xTimer ); static void vLEDTimerCallback( xTimerHandle xTimer );
/*
* The handler executed each time a button interrupt is generated. This ensures
* the LED defined by mainTIMER_CONTROLLED_LED is on, and resets the timer so
* the timer will not turn the LED off for a full 5 seconds after the button
* interrupt occurred.
*/
static void prvButtonInputInterruptHandler( void *pvUnused ); static void prvButtonInputInterruptHandler( void *pvUnused );
/*-----------------------------------------------------------*/ /*-----------------------------------------------------------*/
/* The queue used by both tasks. */ /* The queue used by the queue send and queue receive tasks. */
static xQueueHandle xQueue = NULL; static xQueueHandle xQueue = NULL;
/* The LED software timer. This uses vLEDTimerCallback() as its callback /* The LED software timer. This uses vLEDTimerCallback() as its callback
@ -172,9 +183,14 @@ static volatile unsigned char ucGPIOState = 0U;
/*-----------------------------------------------------------*/ /*-----------------------------------------------------------*/
/* Structures that hold the state of the various peripherals used by this demo.
These are used by the Xilinx peripheral driver API functions. */
static XTmrCtr xTimer0Instance; static XTmrCtr xTimer0Instance;
static XGpio xOutputGPIOInstance, xInputGPIOInstance; static XGpio xOutputGPIOInstance, xInputGPIOInstance;
static const unsigned portBASE_TYPE uxGPIOOutputChannel = 1UL, uxGPIOInputChannel = 1UL;
/* Constants required by the Xilinx peripheral driver API functions that are
relevant to the particular hardware set up. */
static const unsigned long ulGPIOOutputChannel = 1UL, ulGPIOInputChannel = 1UL;
/*-----------------------------------------------------------*/ /*-----------------------------------------------------------*/
@ -183,29 +199,31 @@ int main( void )
/* Configure the interrupt controller, LED outputs and button inputs. */ /* Configure the interrupt controller, LED outputs and button inputs. */
prvSetupHardware(); prvSetupHardware();
/* Create the queue. */ /* Create the queue used by the queue send and queue receive tasks as
described in the comments at the top of this file. */
xQueue = xQueueCreate( mainQUEUE_LENGTH, sizeof( unsigned long ) ); xQueue = xQueueCreate( mainQUEUE_LENGTH, sizeof( unsigned long ) );
if( xQueue != NULL ) /* Sanity check that the queue was created. */
{ configASSERT( xQueue );
/* Start the two tasks as described in the comments at the top of this
file. */
xTaskCreate( prvQueueReceiveTask, ( signed char * ) "Rx", configMINIMAL_STACK_SIZE, NULL, mainQUEUE_RECEIVE_TASK_PRIORITY, NULL );
xTaskCreate( prvQueueSendTask, ( signed char * ) "TX", configMINIMAL_STACK_SIZE, NULL, mainQUEUE_SEND_TASK_PRIORITY, NULL );
/* Create the software timer that is responsible for turning off the LED /* Start the two tasks as described in the comments at the top of this
if the button is not pushed within 5000ms, as described at the top of file. */
this file. */ xTaskCreate( prvQueueReceiveTask, ( signed char * ) "Rx", configMINIMAL_STACK_SIZE, NULL, mainQUEUE_RECEIVE_TASK_PRIORITY, NULL );
xLEDTimer = xTimerCreate( ( const signed char * ) "LEDTimer", /* A text name, purely to help debugging. */ xTaskCreate( prvQueueSendTask, ( signed char * ) "TX", configMINIMAL_STACK_SIZE, NULL, mainQUEUE_SEND_TASK_PRIORITY, NULL );
( 5000 / portTICK_RATE_MS ), /* The timer period, in this case 5000ms (5s). */
pdFALSE, /* This is a one shot timer, so xAutoReload is set to pdFALSE. */
( void * ) 0, /* The ID is not used, so can be set to anything. */
vLEDTimerCallback /* The callback function that switches the LED off. */
);
/* Start the tasks and timer running. */ /* Create the software timer that is responsible for turning off the LED
vTaskStartScheduler(); if the button is not pushed within 5000ms, as described at the top of
} this file. The timer is not actually started until a button interrupt is
pushed, as it is not until that point that the LED is turned on. */
xLEDTimer = xTimerCreate( ( const signed char * ) "LEDTimer", /* A text name, purely to help debugging. */
( 5000 / portTICK_RATE_MS ), /* The timer period, in this case 5000ms (5s). */
pdFALSE, /* This is a one shot timer, so xAutoReload is set to pdFALSE. */
( void * ) 0, /* The ID is not used, so can be set to anything. */
vLEDTimerCallback /* The callback function that switches the LED off. */
);
/* Start the tasks and timer running. */
vTaskStartScheduler();
/* If all is well, the scheduler will now be running, and the following line /* If all is well, the scheduler will now be running, and the following line
will never be reached. If the following line does execute, then there was will never be reached. If the following line does execute, then there was
@ -216,6 +234,7 @@ int main( void )
} }
/*-----------------------------------------------------------*/ /*-----------------------------------------------------------*/
/* The callback is executed when the LED timer expires. */
static void vLEDTimerCallback( xTimerHandle xTimer ) static void vLEDTimerCallback( xTimerHandle xTimer )
{ {
/* The timer has expired - so no button pushes have occurred in the last /* The timer has expired - so no button pushes have occurred in the last
@ -224,35 +243,34 @@ static void vLEDTimerCallback( xTimerHandle xTimer )
button interrupt - in this trivial case, for simplicity, the critical button interrupt - in this trivial case, for simplicity, the critical
section is omitted. */ section is omitted. */
ucGPIOState &= ~mainTIMER_CONTROLLED_LED; ucGPIOState &= ~mainTIMER_CONTROLLED_LED;
XGpio_DiscreteWrite( &xOutputGPIOInstance, uxGPIOOutputChannel, ucGPIOState ); XGpio_DiscreteWrite( &xOutputGPIOInstance, ulGPIOOutputChannel, ucGPIOState );
} }
/*-----------------------------------------------------------*/ /*-----------------------------------------------------------*/
/* The ISR executed when the user button is pushed. */ /* The ISR is executed when the user button is pushed. */
static void prvButtonInputInterruptHandler( void *pvUnused ) static void prvButtonInputInterruptHandler( void *pvUnused )
{ {
portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE; long lHigherPriorityTaskWoken = pdFALSE;
/* The button was pushed, so ensure the LED is on before resetting the /* The button was pushed, so ensure the LED is on before resetting the
LED timer. The LED timer will turn the LED off if the button is not LED timer. The LED timer will turn the LED off if the button is not
pushed within 5000ms. */ pushed within 5000ms. */
ucGPIOState |= mainTIMER_CONTROLLED_LED; ucGPIOState |= mainTIMER_CONTROLLED_LED;
XGpio_DiscreteWrite( &xOutputGPIOInstance, uxGPIOOutputChannel, ucGPIOState ); XGpio_DiscreteWrite( &xOutputGPIOInstance, ulGPIOOutputChannel, ucGPIOState );
/* This interrupt safe FreeRTOS function can be called from this interrupt /* Ensure only the ISR safe reset API function is used, as this is executed
because the interrupt priority is below the in an interrupt context. */
configMAX_SYSCALL_INTERRUPT_PRIORITY setting in FreeRTOSConfig.h. */ xTimerResetFromISR( xLEDTimer, &lHigherPriorityTaskWoken );
xTimerResetFromISR( xLEDTimer, &xHigherPriorityTaskWoken );
/* Clear the interrupt before leaving. */ /* Clear the interrupt before leaving. */
XGpio_InterruptClear( &xInputGPIOInstance, uxGPIOInputChannel ); XGpio_InterruptClear( &xInputGPIOInstance, ulGPIOInputChannel );
/* If calling xTimerResetFromISR() caused a task (in this case the timer /* If calling xTimerResetFromISR() caused a task (in this case the timer
service/daemon task) to unblock, and the unblocked task has a priority service/daemon task) to unblock, and the unblocked task has a priority
higher than or equal to the task that was interrupted, then higher than or equal to the task that was interrupted, then
xHigherPriorityTaskWoken will now be set to pdTRUE, and calling lHigherPriorityTaskWoken will now be set to pdTRUE, and calling
portEND_SWITCHING_ISR() will ensure the unblocked task runs next. */ portEND_SWITCHING_ISR() will ensure the unblocked task runs next. */
portYIELD_FROM_ISR( xHigherPriorityTaskWoken ); portYIELD_FROM_ISR( lHigherPriorityTaskWoken );
} }
/*-----------------------------------------------------------*/ /*-----------------------------------------------------------*/
@ -276,7 +294,7 @@ const unsigned long ulValueToSend = 100UL;
toggle an LED. 0 is used as the block time so the sending operation toggle an LED. 0 is used as the block time so the sending operation
will not block - it shouldn't need to block as the queue should always will not block - it shouldn't need to block as the queue should always
be empty at this point in the code. */ be empty at this point in the code. */
xQueueSend( xQueue, &ulValueToSend, 0 ); xQueueSend( xQueue, &ulValueToSend, mainDONT_BLOCK );
} }
} }
/*-----------------------------------------------------------*/ /*-----------------------------------------------------------*/
@ -309,7 +327,7 @@ unsigned long ulReceivedValue;
ucGPIOState |= mainTASK_CONTROLLED_LED; ucGPIOState |= mainTASK_CONTROLLED_LED;
} }
XGpio_DiscreteWrite( &xOutputGPIOInstance, uxGPIOOutputChannel, ucGPIOState ); XGpio_DiscreteWrite( &xOutputGPIOInstance, ulGPIOOutputChannel, ucGPIOState );
} }
} }
} }
@ -325,11 +343,11 @@ const unsigned char ucSetToOutput = 0U;
if( xStatus == XST_SUCCESS ) if( xStatus == XST_SUCCESS )
{ {
/* All bits on this channel are going to be outputs (LEDs). */ /* All bits on this channel are going to be outputs (LEDs). */
XGpio_SetDataDirection( &xOutputGPIOInstance, uxGPIOOutputChannel, ucSetToOutput ); XGpio_SetDataDirection( &xOutputGPIOInstance, ulGPIOOutputChannel, ucSetToOutput );
/* Start with all LEDs off. */ /* Start with all LEDs off. */
ucGPIOState = 0U; ucGPIOState = 0U;
XGpio_DiscreteWrite( &xOutputGPIOInstance, uxGPIOOutputChannel, ucGPIOState ); XGpio_DiscreteWrite( &xOutputGPIOInstance, ulGPIOOutputChannel, ucGPIOState );
} }
/* Initialise the GPIO for the button inputs. */ /* Initialise the GPIO for the button inputs. */
@ -340,19 +358,23 @@ const unsigned char ucSetToOutput = 0U;
if( xStatus == XST_SUCCESS ) if( xStatus == XST_SUCCESS )
{ {
/* Install the handler defined in this task for the button input. */ /* Install the handler defined in this task for the button input.
*NOTE* The FreeRTOS defined xPortInstallInterruptHandler() API function
must be used for this purpose. */
xStatus = xPortInstallInterruptHandler( XPAR_MICROBLAZE_0_INTC_PUSH_BUTTONS_4BITS_IP2INTC_IRPT_INTR, prvButtonInputInterruptHandler, NULL ); xStatus = xPortInstallInterruptHandler( XPAR_MICROBLAZE_0_INTC_PUSH_BUTTONS_4BITS_IP2INTC_IRPT_INTR, prvButtonInputInterruptHandler, NULL );
if( xStatus == pdPASS ) if( xStatus == pdPASS )
{ {
/* Set buttons to input. */ /* Set buttons to input. */
XGpio_SetDataDirection( &xInputGPIOInstance, uxGPIOInputChannel, ~( ucSetToOutput ) ); XGpio_SetDataDirection( &xInputGPIOInstance, ulGPIOInputChannel, ~( ucSetToOutput ) );
/* Enable the button input interrupts in the interrupt controller.
*NOTE* The vPortEnableInterrupt() API function must be used for this
purpose. */
vPortEnableInterrupt( XPAR_MICROBLAZE_0_INTC_PUSH_BUTTONS_4BITS_IP2INTC_IRPT_INTR ); vPortEnableInterrupt( XPAR_MICROBLAZE_0_INTC_PUSH_BUTTONS_4BITS_IP2INTC_IRPT_INTR );
/* Enable GPIO channel interrupts. */ /* Enable GPIO channel interrupts. */
XGpio_InterruptEnable( &xInputGPIOInstance, uxGPIOInputChannel ); //_RB_ XGpio_InterruptEnable( &xInputGPIOInstance, ulGPIOInputChannel );
XGpio_InterruptGlobalEnable( &xInputGPIOInstance ); XGpio_InterruptGlobalEnable( &xInputGPIOInstance );
} }
} }
@ -372,6 +394,7 @@ void vApplicationMallocFailedHook( void )
internally by FreeRTOS API functions that create tasks, queues, software internally by FreeRTOS API functions that create tasks, queues, software
timers, and semaphores. The size of the FreeRTOS heap is set by the timers, and semaphores. The size of the FreeRTOS heap is set by the
configTOTAL_HEAP_SIZE configuration constant in FreeRTOSConfig.h. */ configTOTAL_HEAP_SIZE configuration constant in FreeRTOSConfig.h. */
taskDISABLE_INTERRUPTS();
for( ;; ); for( ;; );
} }
/*-----------------------------------------------------------*/ /*-----------------------------------------------------------*/
@ -407,29 +430,19 @@ volatile size_t xFreeHeapSpace;
} }
/*-----------------------------------------------------------*/ /*-----------------------------------------------------------*/
void vMainConfigureTimerForRunTimeStats( void ) /* This is an application defined callback function used to install the tick
{ interrupt handler. It is provided as an application callback because the kernel
/* This function is not used by the Blinky build configuration, but needs will run on lots of different MicroBlaze and FPGA configurations - not all of
to be defined as the Blinky and Full build configurations share a which will have the same timer peripherals defined or available. This example
FreeRTOSConfig.h header file. */ uses the AXI Timer 0. If that is available on your hardware platform then this
} example callback implementation should not require modification. The name of
/*-----------------------------------------------------------*/ the interrupt handler that should be installed in vTickISR(), which the function
below declares as an extern. */
unsigned long ulGetRunTimeCounterValue( void )
{
/* This function is not used by the Blinky build configuration, but needs
to be defined as the Blinky and Full build configurations share a
FreeRTOSConfig.h header file. */
return 0UL;
}
/*-----------------------------------------------------------*/
void vApplicationSetupTimerInterrupt( void ) void vApplicationSetupTimerInterrupt( void )
{ {
portBASE_TYPE xStatus; portBASE_TYPE xStatus;
const unsigned char ucTimerCounterNumber = ( unsigned char ) 0U; const unsigned char ucTimerCounterNumber = ( unsigned char ) 0U;
//const unsigned long ulCounterValue = ( ( XPAR_AXI_TIMER_0_CLOCK_FREQ_HZ / configTICK_RATE_HZ ) - 1UL ); const unsigned long ulCounterValue = ( ( XPAR_AXI_TIMER_0_CLOCK_FREQ_HZ / configTICK_RATE_HZ ) - 1UL );
const unsigned long ulCounterValue = ( ( ( XPAR_AXI_TIMER_0_CLOCK_FREQ_HZ / configTICK_RATE_HZ ) - 1UL ) ) * 2UL; //_RB_ there is a clock set up incorrectly somwehre, the *2 should not be required. */
extern void vTickISR( void *pvUnused ); extern void vTickISR( void *pvUnused );
/* Initialise the timer/counter. */ /* Initialise the timer/counter. */
@ -437,12 +450,17 @@ extern void vTickISR( void *pvUnused );
if( xStatus == XST_SUCCESS ) if( xStatus == XST_SUCCESS )
{ {
/* Install the tick interrupt handler as the timer ISR. */ /* Install the tick interrupt handler as the timer ISR.
*NOTE* The xPortInstallInterruptHandler() API function must be used for
this purpose. */
xStatus = xPortInstallInterruptHandler( XPAR_INTC_0_TMRCTR_0_VEC_ID, vTickISR, NULL ); xStatus = xPortInstallInterruptHandler( XPAR_INTC_0_TMRCTR_0_VEC_ID, vTickISR, NULL );
} }
if( xStatus == pdPASS ) if( xStatus == pdPASS )
{ {
/* Enable the timer interrupt in the interrupt controller.
*NOTE* The vPortEnableInterrupt() API function must be used for this
purpose. */
vPortEnableInterrupt( XPAR_INTC_0_TMRCTR_0_VEC_ID ); vPortEnableInterrupt( XPAR_INTC_0_TMRCTR_0_VEC_ID );
/* Configure the timer interrupt handler. */ /* Configure the timer interrupt handler. */
@ -461,17 +479,24 @@ extern void vTickISR( void *pvUnused );
XTmrCtr_Start( &xTimer0Instance, ucTimerCounterNumber ); XTmrCtr_Start( &xTimer0Instance, ucTimerCounterNumber );
} }
/* Sanity check that the function executed as expected. */
configASSERT( ( xStatus == pdPASS ) ); configASSERT( ( xStatus == pdPASS ) );
} }
/*-----------------------------------------------------------*/ /*-----------------------------------------------------------*/
/* This is an application defined callback function used to clear whichever
interrupt was installed by the the vApplicationSetupTimerInterrupt() callback
function - in this case the interrupt generated by the AXI timer. It is
provided as an application callback because the kernel will run on lots of
different MicroBlaze and FPGA configurations - not all of which will have the
same timer peripherals defined or available. This example uses the AXI Timer 0.
If that is available on your hardware platform then this example callback
implementation should not require modification provided the example definition
of vApplicationSetupTimerInterrupt() is also not modified. */
void vApplicationClearTimerInterrupt( void ) void vApplicationClearTimerInterrupt( void )
{ {
unsigned long ulCSR; unsigned long ulCSR;
/* Increment the RTOS tick - this might cause a task to unblock. */
vTaskIncrementTick();
/* Clear the timer interrupt */ /* Clear the timer interrupt */
ulCSR = XTmrCtr_GetControlStatusReg( XPAR_AXI_TIMER_0_BASEADDR, 0 ); ulCSR = XTmrCtr_GetControlStatusReg( XPAR_AXI_TIMER_0_BASEADDR, 0 );
XTmrCtr_SetControlStatusReg( XPAR_AXI_TIMER_0_BASEADDR, 0, ulCSR ); XTmrCtr_SetControlStatusReg( XPAR_AXI_TIMER_0_BASEADDR, 0, ulCSR );