piolib.h

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#include "daadioLib.h"
#include "semLib.h"
#include "msgQLib.h"

/**************************************************
		PUBLIC
**************************************************/

#define PIO_MAX_PORTS				6
#define PIO_MAX_CHANNELS_PER_PORT	8

#define ON							1
#define OFF							0

#define PORT_A	0
#define PORT_B	1
#define PORT_C	2
#define PORT_D	3
#define PORT_E	4
#define PORT_F	5

typedef struct
	{
	int		port;		/* port number */
	int 	channel;	/* channel number */
	BOOL	state;		/* current state of channel, i.e. ON or OFF */
	ULONG	timeStamp;	/* current tick count from tickGet()  */
	} PIO_MSG_Q_DATA;

/**************************************************
		PRIVATE
**************************************************/

/* Offset of PIO registers */
#define PIO_OFFSET					0x20
/* Offset of output enable register */
#define PIO_OUTPUT_ENABLE_OFFSET	0x27
/* Offset of pattern register */
#define PIO_PATTERN_REG_OFFSET		0x65
/* Offset of PORT A register */
#define PIO_PORT_A_OFFSET			0x21

#define PIO_POLL_DELAY				1

/* To obtain a port register offset we need to add PIO_OFFSET plus 
   the port number with bit 0 inverted.  This is due to each even numbered
   port is at an address one higher than its odd brethern, i.e. Port A (0)
   is at offset 0x21 while Port B (1) is at 0x20. */


#define PIO_PORT_NUM_TO_OFF(port)	(PIO_OFFSET + (int)(((port) & ~1) + \
									(((port) & 1) ^ 1)))

typedef struct
	{
	MSG_Q_ID	intMsgQId;		/* messsage queue ID used by ISR */
	SEM_ID		mutexSem;		/* mutual exclusion semaphore */
	BOOL		initialized;	/* indicates if PIO module initialized */
	} PIO;