#ifndef LT8900_H
#define LT8900_H

//===================================================
// LT8900 Parameter Definition
//===================================================
#define SYNCWORD_0	0x34
#define SYNCWORD_1	0x56
#define SYNCWORD_2	0x78
#define SYNCWORD_3	0x9A
#define SYNCWORD_4	0xBC
#define SYNCWORD_5	0xDE
#define SYNCWORD_6	0xF0
#define SYNCWORD_7	0x12

#define LT_XTAL_OSC_EN	1 //Enable crystal
#define LT_RSSI_PDN			0 //RSSI operation
#define LT_VCO_CAL_EN		1 //calibrate VCO for each RF operation

//Reg32 (0x20)
#define LT_PREAMBLE_LEN	7 //preamble = 4byte
#define LT_SYNCWORD_LEN 3 //syncword = 64bit
#define	LT_TRAILER_LEN	0 //trailer = 4bit
#define LT_DATA_PACKET_TYPE	0 //data packet type = NRZ law
#define LT_FEC_TYPE			0  // No FEC
#define LT_BRCLK_SEL		0	// NO BRCLK clock output
#define LT_R32H					((LT_PREAMBLE_LEN << 5) + (LT_SYNCWORD_LEN << 3) + LT_TRAILER_LEN)
#define LT_R32L					((LT_DATA_PACKET_TYPE << 6) + (LT_FEC_TYPE << 4) + (LT_BRCLK_SEL << 1))

//Reg40 (0x28)
#define LT_FIFO_EMPTY_THRESHOLD	4
#define LT_FIFO_FULL_THRESHOLD	4
#define	LT_SYNCWORD_THRESHOLD		7
#define LT_R40H			((LT_FIFO_EMPTY_THRESHOLD << 3)+ (LT_FIFO_FULL_THRESHOLD >> 2))
#define LT_R40L			((LT_FIFO_FULL_THRESHOLD<<6) + LT_SYNCWORD_THRESHOLD)



//Reg41 (0x29)
#define	LT_CRC_ON				1 //CRC on
#define LT_SCRAMBLE_ON	0 //scrable off
#define	LT_PACK_LENGTH_EN	1 //first data byte is packet length
#define LT_FW_TERM_TX		1
#define LT_AUTO_ACK			0 //auto ACK
#define	LT_PKT_FIFO_POL 0 //PKT_FLAG is active high
#define LT_CRC_INIT_DATA	0xAA //CRC initial data



const char code LT_CH_Table[10][8] =
{
	(0,10,20,30,40,50,60,70),
	(1,11,21,31,41,51,61,71),
	(2,12,22,32,42,52,62,72),
	(3,13,23,33,43,53,63,73),
	(4,14,24,34,44,54,64,74),
	(5,15,25,35,45,55,65,75),
	(6,16,26,36,46,56,66,76),
	(7,17,27,37,47,57,67,77),
	(8,18,28,38,48,58,68,78),
	(9,19,29,39,49,59,69,79)
};

sbit	MISO			= P1^0; //input
sbit	RESET_N		= P1^1; //output
sbit	CLK				= P1^2; //output
sbit	MOSI			= P1^3; //output
sbit	SS				= P1^4; //output
sbit	FIFO_FLAG	= P0^6; //input
sbit	PKT_FLAG	= P0^7; //input

char LT_RFPower = 0x0F; //maximum power
unsigned char LT_SCAN_RSSI_CN_NO = (31 << 2);
unsigned char	LT_RX_ACK_TIME = 100; //wait RX ACK pack for 100us
unsigned char LT_SCAN_RSSI_CH = 0; // scan channle = 2042+x
unsigned char	LT_SCAN_RSSI_TIME = 100; //scan RSSI wait time 100us

char bdata	LT_REG35 = 0;
sbit	LT_POWER_DOWN = LT_REG35^7;
sbit	LT_SLEEP_MODE = LT_REG35^6;
sbit	LT_BRCLK_ON_SLEEP = LT_REG35^4;

char bdata	LT_REG48H = 0;
sbit	LT_CRC_ERROR = LT_REG48H^7;
sbit	LT_FEC23_ERROR = LT_REG48H^6;
sbit	LT_FRAMER_ST_5	= LT_REG48H^5;
sbit	LT_FRAMER_ST_4	= LT_REG48H^4;
sbit	LT_FRAMER_ST_3	= LT_REG48H^3;
sbit	LT_FRAMER_ST_2	= LT_REG48H^2;
sbit	LT_FRAMER_ST_1	= LT_REG48H^1;
sbit	LT_FRAMER_ST_0	= LT_REG48H^0;

char	bdata LT_REG48L = 0;
sbit	LT_SYNCWORD_RECV	= LT_REG48L^7;
sbit	LT_PKT_FLAG				= LT_REG48L^6;
sbit	LT_FIFO_FLAG			= LT_REG48L^5;

char	W_FIFO = 0;
char	R_FIFO = 0;
	
#endif