/* ---------------------------------------------------------------------------
 * dio.c - v0.1                                         (c) 2007 Micro-key bv
 * ---------------------------------------------------------------------------
 * Micro-key bv
 * Industrieweg 28, 9804 TG Noordhorn
 * Postbus 92, 9800 AB Zuidhorn
 * The Netherlands
 * Tel: +31 594 503020
 * Fax: +31 594 505825
 * Email: support@microkey.nl  
 * Web: www.microkey.nl
 * ---------------------------------------------------------------------------
 * Description: Digital inputs/outputs interface.
 * ---------------------------------------------------------------------------
 * Version(s):  0.1, 28-11-2007, fvds.
 *                   Creation.
 * ---------------------------------------------------------------------------
 */

/* ---------------------------------------------------------------------------
 * System include files
 * ---------------------------------------------------------------------------
 */
#include <stdio.h>
#include <stdlib.h>


/* ---------------------------------------------------------------------------
 * Application include files
 * ---------------------------------------------------------------------------
 */
#include "LPC23xx.h"
#include "types.h"
#include "dio.h"
#include "dioISR.h"
#include "armVIC.h"

/* FreeRTOS includes */
#include "FreeRTOS.h"
#include "Task.h"
#include "queue.h"

/* ---------------------------------------------------------------------------
 * Local constant and macro definitions
 * ---------------------------------------------------------------------------
 */

/* ---------------------------------------------------------------------------
 * Global variable definitions
 * ---------------------------------------------------------------------------
 */
extern xQueueHandle dispatchedIsrQueue;
t_IsrDispatchQueueItem dispatchItem;

/* ---------------------------------------------------------------------------
 * Local variable definitions
 * ---------------------------------------------------------------------------
 */
volatile UINT32 receivedInts = 0;

/* ---------------------------------------------------------------------------
 * Local function definitions
 * ---------------------------------------------------------------------------
 */
static void GpioHandler( void );


void gpioISR()
{
	/* Save the context of the interrupted task. */
	portSAVE_CONTEXT();
		{
		/* Call the handler to do the work.  This must be a separate function to
		the wrapper to ensure the correct stack frame is set up. */
		GpioHandler();
		}
	/* Restore the context of whichever task is going to run once the interrupt
	completes. */
	portRESTORE_CONTEXT();
}


void GpioHandler( void )
{
	receivedInts++;
	
	// Check flags
	// -=NOTE=- Because input signal is inverted; the rising and
	//          falling signal are switched.
	dispatchItem.riseInterrupts[0] = IO0_INT_STAT_F; 
	dispatchItem.fallInterrupts[0] = IO0_INT_STAT_R; 
	dispatchItem.riseInterrupts[1] = IO2_INT_STAT_R;
	dispatchItem.fallInterrupts[1] = IO2_INT_STAT_F;

	xQueueSendToBackFromISR( dispatchedIsrQueue, &dispatchItem, pdFALSE );
	
	IO0_INT_CLR = 0xFFFFFFFF;
	IO2_INT_CLR = 0xFFFFFFFF;
	
	VICVectAddr = 0x00000000;             // clear this interrupt from the VIC
}