si4421.h

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/*
** ============================================================================
**
** FILE
**  Si4421.h
**
** DESCRIPTION
**  Header files for Si4421 usage, contains RF specific definition and type declaration
**
** CREATED
**  Silicon Laboratories Hungary Ltd
**
** COPYRIGHT
**  Copyright 2008 Silicon Laboratories, Inc.  
**	http://www.silabs.com
**
** ============================================================================
*/
#ifndef Ezlink_Si4421H
#define Ezlink_Si4421H

#include "S8051.h"
#include "Setup_IA4421.h"
#include "uart.h"


                /* ======================================= *
                 *          D E F I N I T I O N S          *
                 * ======================================= */


//Receive state machine states
#define	NODATA          		(0)
#define	DATA_RECEIVED   		(1)
#define	PACKET_RECEIVED 		(2)

//Packet structure definitions
#define	MAX_PAYLOAD_LENGTH  	(40)
#define	HEADER_LENGTH      		(5)      // preamble(2) + synchron word (2) + packet length (1) 
#define MAX_LENGTH				(MAX_PAYLOAD_LENGTH + 1)
#define SYNCH_WORD_H		2			//this definitions help to address the header fields in the array
#define SYNCH_WORD_L		3		
#define LENGTH				4

//Register write definition
#define TX_REGISTER_WRITE   	(0xB800)

			     



                /* ======================================= *
                 *     T Y P E   D E C L A R A T I O N     *
                 * ======================================= */


typedef struct _s_rf_packet		//packet structure
{
   	uint8 header[HEADER_LENGTH];
   	uint8 payload[MAX_LENGTH];
} s_rf_packet;


typedef union _rf_packet
{
   s_rf_packet   	name;
   uint8      		_data[HEADER_LENGTH + MAX_PAYLOAD_LENGTH];
} rf_packet;

typedef enum _rx_states
{
	sWaitForLength,
	sReceivePayload,
}RX_STATES;


			


                /* ======================================= *
                 *  F U N C T I O N   P R O T O T Y P E S  *
                 * ======================================= */
void init_ezradio(void);
void ia4421_enable_tx(void);
void ia4421_enable_rx(void);
uint16 ia4421_status_read(void);
uint8 Receive_packet(void);
void ia4421_get_received_payload(uint8 * length, uint8 * payload);
void ia4421_send_packet(uint8 length, uint8 * payload);
uint16 set_frq(uint8 ch);
uint16 set_tx(uint8 dev, uint8 pwr);
uint16 set_dr(uint16 dr);


#endif