/*
 This project is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.

 Multiprotocol is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with Multiprotocol.  If not, see <http://www.gnu.org/licenses/>.
 */

//******************
enum PROTOCOLS
{
	MODE_SERIAL = 0,		// Serial commands
	MODE_FLYSKY = 1,		// =>A7105		/ FLYSKY protocol
	MODE_HUBSAN = 2,		// =>A7105		/ HUBSAN protocol
	MODE_FRSKY = 3,			// =>CC2500		/ FRSKY protocol
	MODE_HISKY = 4,			// =>NRF24L01	/ HISKY protocol
	MODE_V2X2 = 5,			// =>NRF24L01	/ V2x2 protocol
	MODE_DSM2 = 6,			// =>CYRF6936	/ DSM2 protocol
	MODE_DEVO =7,			// =>CYRF6936	/ DEVO protocol
	MODE_YD717 = 8,			// =>NRF24L01	/ YD717 protocol	(CX10 red pcb)
	MODE_KN  = 9,			// =>NRF24L01	/ KN protocol
	MODE_SYMAX = 10,		// =>NRF24L01	/ SYMAX protocol	(SYMAX4 working)
	MODE_SLT = 11,			// =>NRF24L01	/ SLT protocol
	MODE_CX10 = 12,			// =>NRF24L01	/ CX-10 protocol
	MODE_CG023 = 13,		// =>NRF24L01	/ CG023 protocol
	MODE_BAYANG = 14,		// =>NRF24L01	/ BAYANG protocol
	MODE_FRSKYX = 15,		// =>CC2500		/ FRSKYX protocol
};
enum Flysky
{
	Flysky=0,
	V9X9=1,
	V6X6=2,
	V912=3
};
enum Hisky
{
	Hisky=0,
	HK310=1
};
enum DSM2{
	DSM2=0,
	DSMX=1
};
enum YD717
{       			
	YD717=0,
	SKYWLKR=1,
	SYMAX2=2,
	XINXUN=3,
	NIHUI=4
};
enum SYMAX
{
	SYMAX=0,
	SYMAX5C=1,
};

enum CX10 {
    CX10_GREEN = 0,
    CX10_BLUE,		// also compatible with CX10-A, CX12
    DM007
};

enum CG023 {
    CG023 = 0,
    YD829 = 1,
    H8_3D = 2
};

#define PPM_MIN_COMMAND 1250
#define PPM_SWITCH	1550
#define PPM_MAX_COMMAND 1750

//*******************
//***   Pinouts   ***
//*******************
//#define BIND_pin 13
#define LED_pin 13						//Promini original led on B5
//
#define PPM_pin 3						//PPM -D3
#define SDI_pin 5						//SDIO-D5
#define SCLK_pin 4						//SCK-D4
#define CS_pin 2						//CS-D2
#define SDO_pin 6						//D6
//
#define CTRL1 1							//C1 (A1)
#define CTRL2 2							//C2 (A2)
//
#define CTRL1_on  PORTC |= _BV(1)
#define CTRL1_off PORTC &= ~_BV(1)
//
#define CTRL2_on  PORTC |= _BV(2)
#define CTRL2_off PORTC &= ~_BV(2)
//
#define  CS_on PORTD |= _BV(2)			//D2
#define  CS_off PORTD &= ~_BV(2)		//D2
//
#define  SCK_on PORTD |= _BV(4)			//D4
#define  SCK_off PORTD &= ~_BV(4)		//D4
//
#define  SDI_on PORTD |= _BV(5)			//D5
#define  SDI_off PORTD &= ~_BV(5)		//D5

#define  SDI_1 (PIND & (1<<SDI_pin)) == (1<<SDI_pin)	//D5
#define  SDI_0 (PIND & (1<<SDI_pin)) == 0x00			//D5
//
#define SDI_SET_INPUT DDRD &= ~_BV(5)	//D5
#define SDI_SET_OUTPUT DDRD |= _BV(5)	//D5
//Hisky /CC2500/CYRF aditional pinout
#define CC25_CSN_pin 7
#define NRF_CSN_pin 8
#define CYRF_CSN_pin 9
//
#define CYRF_RST_pin A5					//reset pin
//
#define CC25_CSN_on PORTD |= _BV(7)		//D7
#define CC25_CSN_off PORTD &= ~_BV(7)	//D7
//
#define NRF_CSN_on PORTB |= _BV(0)		//D8
#define NRF_CSN_off PORTB &= ~_BV(0)	//D8
//
#define CYRF_CSN_on PORTB |= _BV(1)		//D9
#define CYRF_CSN_off PORTB &= ~_BV(1)	//D9
//  
#define  SDO_1 (PIND & (1<<SDO_pin)) == (1<<SDO_pin)	//D6
#define  SDO_0 (PIND & (1<<SDO_pin)) == 0x00			//D6
//
#define RS_HI PORTC|=_BV(5)				//reset pin cyrf 
#define RX_LO PORTB &= ~_BV(5)//
//
//

// LED
#define LED_ON  PORTB |= _BV(5)
#define LED_OFF  PORTB &= ~_BV(5)
#define LED_TOGGLE  PORTB ^= _BV(5)
#define LED_SET_OUTPUT DDRB |= _BV(5)

// Macros
#define NOP() __asm__ __volatile__("nop")
#define BV(bit) (1 << bit)

//Serial flags definition
#define RX_FLAG_on			protocol_flags |= _BV(0)
#define RX_FLAG_off			protocol_flags &= ~_BV(0)
#define IS_RX_FLAG_on		( ( protocol_flags & _BV(0) ) !=0 )
//
#define CHANGE_PROTOCOL_FLAG_on		protocol_flags |= _BV(1)
#define CHANGE_PROTOCOL_FLAG_off		protocol_flags &= ~_BV(1)
#define IS_CHANGE_PROTOCOL_FLAG_on	( ( protocol_flags & _BV(1) ) !=0 )
//
#define POWER_FLAG_on		protocol_flags |= _BV(2)
#define POWER_FLAG_off		protocol_flags &= ~_BV(2)
#define IS_POWER_FLAG_on	( ( protocol_flags & _BV(2) ) !=0 )
//
#define RANGE_FLAG_on		protocol_flags |= _BV(3)
#define RANGE_FLAG_off		protocol_flags &= ~_BV(3)
#define IS_RANGE_FLAG_on	( ( protocol_flags & _BV(3) ) !=0 )
//
#define AUTOBIND_FLAG_on	protocol_flags |= _BV(4)
#define AUTOBIND_FLAG_off	protocol_flags &= ~_BV(4)
#define IS_AUTOBIND_FLAG_on	( ( protocol_flags & _BV(4) ) !=0 )
//
#define BIND_BUTTON_FLAG_on		protocol_flags |= _BV(5)
#define BIND_BUTTON_FLAG_off	protocol_flags &= ~_BV(5)
#define IS_BIND_BUTTON_FLAG_on	( ( protocol_flags & _BV(5) ) !=0 )

//PPM RX OK
#define PPM_FLAG_off			protocol_flags &= ~_BV(6)
#define PPM_FLAG_on			protocol_flags |= _BV(6)
#define IS_PPM_FLAG_on		( ( protocol_flags & _BV(6) ) !=0 )

//Bind flag for blinking
#define BIND_IN_PROGRESS	protocol_flags &= ~_BV(7)
#define BIND_DONE			protocol_flags |= _BV(7)
#define IS_BIND_DONE_on		( ( protocol_flags & _BV(7) ) !=0 )

#define BLINK_BIND_TIME	100
#define BLINK_SERIAL_TIME	500

//************************
//***  Power settings  ***
//************************
enum {
	TXPOWER_100uW,
	TXPOWER_300uW,
	TXPOWER_1mW,
	TXPOWER_3mW,
	TXPOWER_10mW,
	TXPOWER_30mW,
	TXPOWER_100mW,
	TXPOWER_150mW
};

// A7105 power
//	Power amp is ~+16dBm so:
enum A7105_POWER
{
	A7105_POWER_0 = 0x00<<3 | 0x00,	// TXPOWER_100uW  = -23dBm == PAC=0 TBG=0
	A7105_POWER_1 = 0x00<<3 | 0x01,	// TXPOWER_300uW  = -20dBm == PAC=0 TBG=1
	A7105_POWER_2 = 0x00<<3 | 0x02,	// TXPOWER_1mW    = -16dBm == PAC=0 TBG=2
	A7105_POWER_3 = 0x00<<3 | 0x04,	// TXPOWER_3mW    = -11dBm == PAC=0 TBG=4
	A7105_POWER_4 = 0x01<<3 | 0x05,	// TXPOWER_10mW   =  -6dBm == PAC=1 TBG=5
	A7105_POWER_5 = 0x02<<3 | 0x07,	// TXPOWER_30mW   =   0dBm == PAC=2 TBG=7
	A7105_POWER_6 = 0x03<<3 | 0x07,	// TXPOWER_100mW  =   1dBm == PAC=3 TBG=7
	A7105_POWER_7 = 0x03<<3 | 0x07	// TXPOWER_150mW  =   1dBm == PAC=3 TBG=7
};
#define A7105_HIGH_POWER	A7105_POWER_5
#define	A7105_LOW_POWER		A7105_POWER_3
#define	A7105_BIND_POWER	A7105_POWER_0
#define	A7105_RANGE_POWER	A7105_POWER_0

// NRF Power
// Power setting is 0..3 for nRF24L01
// Claimed power amp for nRF24L01 from eBay is 20dBm. 
enum NRF_POWER
{						//      Raw            w 20dBm PA
	NRF_POWER_0 = 0x00,	// 0 : -18dBm  (16uW)   2dBm (1.6mW)
	NRF_POWER_1 = 0x01,	// 1 : -12dBm  (60uW)   8dBm   (6mW)
	NRF_POWER_2 = 0x02,	// 2 :  -6dBm (250uW)  14dBm  (25mW)
	NRF_POWER_3 = 0x03	// 3 :   0dBm   (1mW)  20dBm (100mW)
};
#define NRF_HIGH_POWER		NRF_POWER_2
#define	NRF_LOW_POWER		NRF_POWER_1
#define	NRF_BIND_POWER		NRF_POWER_0
#define	NRF_RANGE_POWER		NRF_POWER_0

// CC2500 power
enum CC2500_POWER
{
	CC2500_POWER_0 = 0xC5,	// -12dbm
	CC2500_POWER_1 = 0x97,	// -10dbm
	CC2500_POWER_2 = 0x6E,	//  -8dbm
	CC2500_POWER_3 = 0x7F,	//  -6dbm
	CC2500_POWER_4 = 0xA9,	//  -4dbm
	CC2500_POWER_5 = 0xBB,	//  -2dbm
	CC2500_POWER_6 = 0xFE,	//   0dbm
	CC2500_POWER_7 = 0xFF	// 1.5dbm
};
#define CC2500_HIGH_POWER	CC2500_POWER_6
#define	CC2500_LOW_POWER	CC2500_POWER_3
#define CC2500_BIND_POWER	CC2500_POWER_0
#define CC2500_RANGE_POWER	CC2500_POWER_0

// CYRF power
enum CYRF_POWER
{
	CYRF_POWER_0 = 0x00,	// -35dbm
	CYRF_POWER_1 = 0x01,	// -30dbm
	CYRF_POWER_2 = 0x02,	// -24dbm
	CYRF_POWER_3 = 0x03,	// -18dbm
	CYRF_POWER_4 = 0x04,	// -13dbm
	CYRF_POWER_5 = 0x05,	//  -5dbm
	CYRF_POWER_6 = 0x06,	//   0dbm
	CYRF_POWER_7 = 0x07		//  +4dbm
};
#define CYRF_HIGH_POWER		CYRF_POWER_7
#define	CYRF_LOW_POWER		CYRF_POWER_3
#define	CYRF_BIND_POWER		CYRF_POWER_0
#define	CYRF_RANGE_POWER	CYRF_POWER_0

enum TXRX_State {
	TXRX_OFF,
	TX_EN,
	RX_EN
};

// Packet ack status values
enum {
	PKT_PENDING = 0,
	PKT_ACKED,
	PKT_TIMEOUT
};

//*******************
//***  CRC Table  ***
//*******************
const uint16_t PROGMEM CRCTable[]=
{
    0x0000,0x1189,0x2312,0x329b,0x4624,0x57ad,0x6536,0x74bf,
    0x8c48,0x9dc1,0xaf5a,0xbed3,0xca6c,0xdbe5,0xe97e,0xf8f7,
    0x1081,0x0108,0x3393,0x221a,0x56a5,0x472c,0x75b7,0x643e,
    0x9cc9,0x8d40,0xbfdb,0xae52,0xdaed,0xcb64,0xf9ff,0xe876,
    0x2102,0x308b,0x0210,0x1399,0x6726,0x76af,0x4434,0x55bd,
    0xad4a,0xbcc3,0x8e58,0x9fd1,0xeb6e,0xfae7,0xc87c,0xd9f5,
    0x3183,0x200a,0x1291,0x0318,0x77a7,0x662e,0x54b5,0x453c,
    0xbdcb,0xac42,0x9ed9,0x8f50,0xfbef,0xea66,0xd8fd,0xc974,
    0x4204,0x538d,0x6116,0x709f,0x0420,0x15a9,0x2732,0x36bb,
    0xce4c,0xdfc5,0xed5e,0xfcd7,0x8868,0x99e1,0xab7a,0xbaf3,
    0x5285,0x430c,0x7197,0x601e,0x14a1,0x0528,0x37b3,0x263a,
    0xdecd,0xcf44,0xfddf,0xec56,0x98e9,0x8960,0xbbfb,0xaa72,
    0x6306,0x728f,0x4014,0x519d,0x2522,0x34ab,0x0630,0x17b9,
    0xef4e,0xfec7,0xcc5c,0xddd5,0xa96a,0xb8e3,0x8a78,0x9bf1,
    0x7387,0x620e,0x5095,0x411c,0x35a3,0x242a,0x16b1,0x0738,
    0xffcf,0xee46,0xdcdd,0xcd54,0xb9eb,0xa862,0x9af9,0x8b70,
    0x8408,0x9581,0xa71a,0xb693,0xc22c,0xd3a5,0xe13e,0xf0b7,
    0x0840,0x19c9,0x2b52,0x3adb,0x4e64,0x5fed,0x6d76,0x7cff,
    0x9489,0x8500,0xb79b,0xa612,0xd2ad,0xc324,0xf1bf,0xe036,
    0x18c1,0x0948,0x3bd3,0x2a5a,0x5ee5,0x4f6c,0x7df7,0x6c7e,
    0xa50a,0xb483,0x8618,0x9791,0xe32e,0xf2a7,0xc03c,0xd1b5,
    0x2942,0x38cb,0x0a50,0x1bd9,0x6f66,0x7eef,0x4c74,0x5dfd,
    0xb58b,0xa402,0x9699,0x8710,0xf3af,0xe226,0xd0bd,0xc134,
    0x39c3,0x284a,0x1ad1,0x0b58,0x7fe7,0x6e6e,0x5cf5,0x4d7c,
    0xc60c,0xd785,0xe51e,0xf497,0x8028,0x91a1,0xa33a,0xb2b3,
    0x4a44,0x5bcd,0x6956,0x78df,0x0c60,0x1de9,0x2f72,0x3efb,
    0xd68d,0xc704,0xf59f,0xe416,0x90a9,0x8120,0xb3bb,0xa232,
    0x5ac5,0x4b4c,0x79d7,0x685e,0x1ce1,0x0d68,0x3ff3,0x2e7a,
    0xe70e,0xf687,0xc41c,0xd595,0xa12a,0xb0a3,0x8238,0x93b1,
    0x6b46,0x7acf,0x4854,0x59dd,0x2d62,0x3ceb,0x0e70,0x1ff9,
    0xf78f,0xe606,0xd49d,0xc514,0xb1ab,0xa022,0x92b9,0x8330,
    0x7bc7,0x6a4e,0x58d5,0x495c,0x3de3,0x2c6a,0x1ef1,0x0f78
};


//****************************************
//*** MULTI protocol serial definition ***
//****************************************
/*
**************************
16 channels serial protocol
**************************
Serial: 100000 Baud 8e2      _ xxxx xxxx p --
  Total of 26 bytes
  Stream[0]   = 0x55
   header
  Stream[1]   = sub_protocol|BindBit|RangeCheckBit|AutoBindBit;
   sub_protocol is 0..31 (bits 0..4)
   =>	Reserved	0
					Flysky		1
					Hubsan		2
					Frsky		3
					Hisky		4
					V2x2		5
					DSM2		6
					Devo		7
					YD717		8
					KN			9
					SymaX		10
					SLT			11
					CX10		12
					CG023		13
					Bayang		14
					FrskyX		15
   BindBit=>		0x80	1=Bind/0=No
   AutoBindBit=>	0x40	1=Yes /0=No
   RangeCheck=>		0x20	1=Yes /0=No
  Stream[2]   = RxNum | Power | Type;
   RxNum value is 0..15 (bits 0..3)
   Type is 0..7 <<4     (bit 4..6)
		sub_protocol==Flysky
			Flysky	0
			V9x9	1
			V6x6	2
			V912	3
		sub_protocol==Hisky
			Hisky	0
			HK310	1
		sub_protocol==DSM2
			DSM2	0
			DSMX	1
		sub_protocol==YD717
			YD717	0
			SKYWLKR	1
			SYMAX2	2
			XINXUN	3
			NIHUI	4
		sub_protocol==SYMAX
			SYMAX	0
			SYMAX5C	1
		sub_protocol==CX10
			CX10_GREEN	0
			CX10_BLUE	1	// also compatible with CX10-A, CX12
			DM007		2
		sub_protocol==CG023
			CG023		0
			YD829		1
			H8_3D		2
   Power value => 0x80	0=High/1=Low
  Stream[3]   = option_protocol;
   option_protocol value is -127..127
  Stream[4] to [25] = Channels
   16 Channels on 11 bits (0..2047)
	0		-125%
    204		-100%
	1024	   0%
	1843	+100%
	2047	+125%
   Channels bits are concatenated to fit in 22 bytes like in SBUS protocol


**************************
8 channels serial protocol
**************************
Serial: 125000 Baud 8n1      _ xxxx xxxx - ---
  Channels:
    Nbr=8
    10bits=0..1023
	0		-125%
    96		-100%
	512		   0%
	928		+100%
	1023	+125%
  Stream[0]   = sub_protocol|BindBit|RangeCheckBit|AutoBindBit;
   sub_protocol is 0..31 (bits 0..4)
				=>	Reserved	0
					Flysky		1
					Hubsan		2
					Frsky		3
					Hisky		4
					V2x2		5
					DSM2		6
					Devo		7
					YD717		8
					KN			9
					SymaX		10
					SLT			11
					CX10		12
					CG023		13
					Bayang		14
					FrskyX		15
   BindBit=>		0x80	1=Bind/0=No
   AutoBindBit=>	0x40	1=Yes /0=No
   RangeCheck=>		0x20	1=Yes /0=No
  Stream[1]   = RxNum | Power | Type;
   RxNum value is 0..15 (bits 0..3)
   Type is 0..7 <<4     (bit 4..6)
		sub_protocol==Flysky
			Flysky	0
			V9x9	1
			V6x6	2
			V912	3
		sub_protocol==Hisky
			Hisky	0
			HK310	1
		sub_protocol==DSM2
			DSM2	0
			DSMX	1
		sub_protocol==YD717
			YD717	0
			SKYWLKR	1
			SYMAX2	2
			XINXUN	3
			NIHUI	4
		sub_protocol==SYMAX
			SYMAX	0
			SYMAX5C	1
		sub_protocol==CX10
			CX10_GREEN	0
			CX10_BLUE	1	// also compatible with CX10-A, CX12
			DM007		2
		sub_protocol==CG023
			CG023		0
			YD829		1
			H8_3D		2
   Power value => 0x80	0=High/1=Low
  Stream[2]   = option_protocol;
   option_protocol value is -127..127
  Stream[i+3] = lowByte(channel[i])		// with i[0..7]
  Stream[11]  = highByte(channel[0])<<6 | highByte(channel[1])<<4 | highByte(channel[2])<<2 | highByte(channel[3])
  Stream[12]  = highByte(channel[4])<<6 | highByte(channel[5])<<4 | highByte(channel[6])<<2 | highByte(channel[7])
  Stream[13]  = lowByte(CRC16(Stream[0..12])
*/