Add skeleton for V2x2 receiver

Multiprotocol/Multi_Names.ino

@@ -20,6 +20,7 @@ const char STR_HUBSAN[]		="Hubsan";
 const char STR_FRSKYD[]		="FrSky D";
 const char STR_HISKY[]		="Hisky";
 const char STR_V2X2[]		="V2x2";
+const char STR_V2X2_RX[]	="V2x2 RX";
 const char STR_DSM[]		="DSM";
 const char STR_DSM_RX[]		="DSM_RX";
 const char STR_DEVO[]		="Devo";
@@ -344,6 +345,9 @@ const mm_protocol_definition multi_protocols[] = {
 	#if defined(V2X2_NRF24L01_INO)
 		{PROTO_V2X2,       STR_V2X2,      2, STR_SUBTYPE_V2X2,      OPTION_NONE    },
 	#endif
+	#if defined(V2X2_RX_NRF24L01_INO)
+		{PROTO_V2X2_RX,    STR_V2X2_RX,   0, NO_SUBTYPE,            OPTION_NONE    },
+	#endif
 	#if defined(V761_NRF24L01_INO)
 		{PROTO_V761,       STR_V761,      0, NO_SUBTYPE,            OPTION_NONE    },
 	#endif
@@ -374,4 +378,4 @@ const mm_protocol_definition multi_protocols[] = {
 		{0x00,             nullptr,       0, nullptr,               0 }
 };
 
-#endif
+#endif

Multiprotocol/Multiprotocol.h

@@ -99,6 +99,7 @@ enum PROTOCOLS
 	PROTO_DSM_RX	= 70,	// =>CYRF6936
 	PROTO_JJRC345	= 71,	// =>NRF24L01
 	PROTO_Q90C		= 72,	// =>NRF24L01 or CC2500
+	PROTO_V2X2_RX	= 73,	// =>NRF24L01
 
 	PROTO_TEST		= 127,	// =>CC2500
 };
@@ -693,7 +694,8 @@ enum {
 #define FRSKYX_CLONE_EEPROM_OFFSET	822	// (1) format + (3) TX ID + (47) channels, 51 bytes, end is 873
 #define FRSKYX2_CLONE_EEPROM_OFFSET	873	// (1) format + (3) TX ID, 4 bytes, end is 877
 #define DSM_RX_EEPROM_OFFSET	877		// (4) TX ID + format, 5 bytes, end is 882
-//#define CONFIG_EEPROM_OFFSET 	882		// Current configuration of the multimodule
+#define V2X2_RX_EEPROM_OFFSET	882		// (3) TX ID, 3 bytes, end is 885
+//#define CONFIG_EEPROM_OFFSET 	885		// Current configuration of the multimodule
 
 //****************************************
 //*** MULTI protocol serial definition ***
@@ -784,6 +786,7 @@ Serial: 100000 Baud 8e2      _ xxxx xxxx p --
 				DSM_RX		70
 				JJRC345		71
 				Q90C		72
+				V2X2_RX		73
    BindBit=>		0x80	1=Bind/0=No
    AutoBindBit=>	0x40	1=Yes /0=No
    RangeCheck=>		0x20	1=Yes /0=No

Multiprotocol/Multiprotocol.ino

@@ -1554,6 +1554,14 @@ static void protocol_init()
 						remote_callback = Q90C_callback;
 						break;
 				#endif
+
+				#if defined(V2X2_RX_NRF24L01_INO)
+					case PROTO_V2X2_RX:
+						next_callback=initV2X2_Rx();
+						remote_callback = V2X2_Rx_callback;
+						break;
+				#endif
+
 				#if defined(TEST_CC2500_INO)
 					case PROTO_TEST:
 						next_callback=initTEST();

Multiprotocol/Telemetry.ino

@@ -267,7 +267,7 @@ static void multi_send_status()
 	}
 #endif
 
-#if defined (FRSKY_RX_TELEMETRY) || defined (AFHDS2A_RX_TELEMETRY) || defined (BAYANG_RX_TELEMETRY) || defined (DSM_RX_CYRF6936_INO)
+#if defined (FRSKY_RX_TELEMETRY) || defined (AFHDS2A_RX_TELEMETRY) || defined (BAYANG_RX_TELEMETRY) || defined (DSM_RX_CYRF6936_INO) || defined (V2X2_RX_TELEMETRY)
 	void receiver_channels_frame()
 	{
 		uint16_t len = packet_in[3] * 11;			// 11 bit per channel
@@ -939,8 +939,8 @@ void TelemetryUpdate()
 		}
 	#endif
 
-	#if defined (FRSKY_RX_TELEMETRY) || defined(AFHDS2A_RX_TELEMETRY) || defined (BAYANG_RX_TELEMETRY) || defined (DSM_RX_CYRF6936_INO)
+	#if defined (FRSKY_RX_TELEMETRY) || defined(AFHDS2A_RX_TELEMETRY) || defined (BAYANG_RX_TELEMETRY) || defined (DSM_RX_CYRF6936_INO) || defined (V2X2_RX_TELEMETRY)
-		if ((telemetry_link & 1) && (protocol == PROTO_FRSKY_RX || protocol == PROTO_AFHDS2A_RX || protocol == PROTO_BAYANG_RX || protocol == PROTO_DSM_RX) )
+		if ((telemetry_link & 1) && (protocol == PROTO_FRSKY_RX || protocol == PROTO_AFHDS2A_RX || protocol == PROTO_BAYANG_RX || protocol == PROTO_DSM_RX) || protocol == PROTO_V2X2_RX )
 		{
 			receiver_channels_frame();
 			telemetry_link &= ~1;

Multiprotocol/V2X2_Rx_nrf24l01.ino

@@ -0,0 +1,80 @@
+/*
+ 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/>.
+ */
+
+#if defined(V2X2_RX_NRF24L01_INO)
+
+#define V2X2_RX_PACKET_SIZE 16
+#define V2X2_RX_RF_BIND_CHANNEL 0x08
+#define V2X2_RX_RF_NUM_CHANNELS 5
+
+enum {
+	V2X2_RX_BIND,
+	V2X2_RX_DATA
+};
+
+static void __attribute__((unused)) V2X2_Rx_init_nrf24l01()
+{
+	NRF24L01_Initialize();
+	NRF24L01_WriteReg(NRF24L01_03_SETUP_AW, 0x03);		// 5-byte RX/TX address
+	NRF24L01_WriteRegisterMulti(NRF24L01_0B_RX_ADDR_P1, (uint8_t*)"\x66\x88\x68\x68\x68", 5);
+	NRF24L01_FlushRx();
+	NRF24L01_WriteReg(NRF24L01_07_STATUS, 0x70);     	// Clear data ready, data sent, and retransmit
+	NRF24L01_WriteReg(NRF24L01_01_EN_AA, 0x00);      	// No Auto Acknowldgement on all data pipes
+	NRF24L01_WriteReg(NRF24L01_02_EN_RXADDR, 0x3F);  	// Enable all data pipes
+	NRF24L01_WriteReg(NRF24L01_12_RX_PW_P1, V2X2_RX_PACKET_SIZE);
+	NRF24L01_WriteReg(NRF24L01_05_RF_CH, BAYANG_RX_RF_BIND_CHANNEL);
+	NRF24L01_SetBitrate(NRF24L01_BR_1M);             	// 1Mbps
+	NRF24L01_WriteReg(NRF24L01_07_STATUS, 0x70);		// reset registers status
+	NRF24L01_SetTxRxMode(TXRX_OFF);
+	NRF24L01_SetTxRxMode(RX_EN);
+	// switch to RX mode
+	NRF24L01_WriteReg(NRF24L01_00_CONFIG, _BV(NRF24L01_00_EN_CRC) | _BV(NRF24L01_00_CRCO) | _BV(NRF24L01_00_PWR_UP) | _BV(NRF24L01_00_PRIM_RX));
+}
+
+static uint8_t __attribute__((unused)) V2X2_Rx_check_validity()
+{
+	// check transmitter id
+
+	// checksum
+
+}
+
+static void __attribute__((unused)) V2X2_Rx_build_telemetry_packet()
+{
+
+}
+
+uint16_t initV2X2_Rx()
+{
+	V2X2_Rx_init_nrf24l01();
+	
+	phase = V2X2_RX_BIND;
+	return 1000;
+}
+
+uint16_t V2X2_Rx_callback()
+{
+	switch (phase) {
+		case V2X2_RX_BIND:
+			// V2X2_set_tx_id();
+			break;
+		case V2X2_RX_DATA:
+
+			break;
+	}
+	return 0;
+}
+
+#endif

Multiprotocol/V2X2_common.ino

@@ -0,0 +1,52 @@
+/*
+ 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/>.
+ */
+
+#if defined(V2X2_NRF24L01_INO) || defined(V2X2_RX_NRF24L01_INO)
+
+// This is frequency hopping table for V202 protocol
+// The table is the first 4 rows of 32 frequency hopping
+// patterns, all other rows are derived from the first 4.
+// For some reason the protocol avoids channels, dividing
+// by 16 and replaces them by subtracting 3 from the channel
+// number in this case.
+// The pattern is defined by 5 least significant bits of
+// sum of 3 bytes comprising TX id
+const uint8_t PROGMEM v2x2_freq_hopping[][16] = {
+	{ 0x27, 0x1B, 0x39, 0x28, 0x24, 0x22, 0x2E, 0x36,
+		0x19, 0x21, 0x29, 0x14, 0x1E, 0x12, 0x2D, 0x18 }, //  00
+	{ 0x2E, 0x33, 0x25, 0x38, 0x19, 0x12, 0x18, 0x16,
+		0x2A, 0x1C, 0x1F, 0x37, 0x2F, 0x23, 0x34, 0x10 }, //  01
+	{ 0x11, 0x1A, 0x35, 0x24, 0x28, 0x18, 0x25, 0x2A,
+		0x32, 0x2C, 0x14, 0x27, 0x36, 0x34, 0x1C, 0x17 }, //  02
+	{ 0x22, 0x27, 0x17, 0x39, 0x34, 0x28, 0x2B, 0x1D,
+		0x18, 0x2A, 0x21, 0x38, 0x10, 0x26, 0x20, 0x1F }  //  03
+};
+
+static void __attribute__((unused)) V2X2_set_tx_id(void)
+{
+	uint8_t sum;
+	sum = rx_tx_addr[1] + rx_tx_addr[2] + rx_tx_addr[3];
+	// Higher 3 bits define increment to corresponding row
+	uint8_t increment = (sum & 0x1e) >> 2;
+	// Base row is defined by lowest 2 bits
+	sum &= 0x03;
+	for (uint8_t i = 0; i < 16; ++i) {
+		uint8_t val = pgm_read_byte_near(&v2x2_freq_hopping[sum][i]) + increment;
+		// Strange avoidance of channels divisible by 16
+		hopping_frequency[i] = (val & 0x0f) ? val : val - 3;
+	}
+}
+
+#endif

Multiprotocol/V2X2_nrf24l01.ino

@@ -59,25 +59,6 @@ enum {
 	V202_DATA//4
 };
 
-// This is frequency hopping table for V202 protocol
-// The table is the first 4 rows of 32 frequency hopping
-// patterns, all other rows are derived from the first 4.
-// For some reason the protocol avoids channels, dividing
-// by 16 and replaces them by subtracting 3 from the channel
-// number in this case.
-// The pattern is defined by 5 least significant bits of
-// sum of 3 bytes comprising TX id
-const uint8_t PROGMEM freq_hopping[][16] = {
-	{ 0x27, 0x1B, 0x39, 0x28, 0x24, 0x22, 0x2E, 0x36,
-		0x19, 0x21, 0x29, 0x14, 0x1E, 0x12, 0x2D, 0x18 }, //  00
-	{ 0x2E, 0x33, 0x25, 0x38, 0x19, 0x12, 0x18, 0x16,
-		0x2A, 0x1C, 0x1F, 0x37, 0x2F, 0x23, 0x34, 0x10 }, //  01
-	{ 0x11, 0x1A, 0x35, 0x24, 0x28, 0x18, 0x25, 0x2A,
-		0x32, 0x2C, 0x14, 0x27, 0x36, 0x34, 0x1C, 0x17 }, //  02
-	{ 0x22, 0x27, 0x17, 0x39, 0x34, 0x28, 0x2B, 0x1D,
-		0x18, 0x2A, 0x21, 0x38, 0x10, 0x26, 0x20, 0x1F }  //  03
-};
-
 static void __attribute__((unused)) v202_init()
 {
 	NRF24L01_Initialize();
@@ -122,21 +103,6 @@ static void __attribute__((unused)) V202_init2()
 	//Done by TX_EN??? => NRF24L01_WriteReg(NRF24L01_00_CONFIG, _BV(NRF24L01_00_EN_CRC) | _BV(NRF24L01_00_CRCO) | _BV(NRF24L01_00_PWR_UP));
 }
 
-static void __attribute__((unused)) V2X2_set_tx_id(void)
-{
-	uint8_t sum;
-	sum = rx_tx_addr[1] + rx_tx_addr[2] + rx_tx_addr[3];
-	// Higher 3 bits define increment to corresponding row
-	uint8_t increment = (sum & 0x1e) >> 2;
-	// Base row is defined by lowest 2 bits
-	sum &=0x03;
-	for (uint8_t i = 0; i < 16; ++i) {
-		uint8_t val = pgm_read_byte_near(&freq_hopping[sum][i]) + increment;
-		// Strange avoidance of channels divisible by 16
-		hopping_frequency[i] = (val & 0x0f) ? val : val - 3;
-	}
-}
-
 static void __attribute__((unused)) V2X2_add_pkt_checksum()
 {
 	uint8_t sum = 0;

Multiprotocol/Validate.h

@@ -263,6 +263,7 @@
 	#undef	SYMAX_NRF24L01_INO
 	#undef	TIGER_NRF24L01_INO
 	#undef	V2X2_NRF24L01_INO
+	#undef	V2X2_RX_NRF24L01_INO
 	#undef	V761_NRF24L01_INO
 	#undef	V911S_NRF24L01_INO
 	#undef	XK_NRF24L01_INO
@@ -311,6 +312,8 @@
 	#undef BAYANG_RX_NRF24L01_INO
 	#undef DEVO_HUB_TELEMETRY
 	#undef DSM_RX_CYRF6936_INO
+	#undef V2X2_RX_TELEMETRY
+	#undef V2X2_RX_NRF24L01_INO
 #else
 	#if defined(MULTI_TELEMETRY) && defined(MULTI_STATUS)
 		#error You should choose either MULTI_TELEMETRY or MULTI_STATUS but not both.
@@ -331,6 +334,10 @@
 		#undef BAYANG_RX_TELEMETRY
 		#undef BAYANG_RX_NRF24L01_INO
 	#endif
+	#if not defined(V2X2_RX_NRF24L01_INO) || not defined(V2X2_RX_TELEMETRY)
+		#undef V2X2_RX_TELEMETRY
+		#undef V2X2_RX_NRF24L01_INO
+	#endif
 	#if not defined(BAYANG_NRF24L01_INO)
 		#undef BAYANG_HUB_TELEMETRY
 	#endif
@@ -373,7 +380,7 @@
 	#if not defined(HOTT_CC2500_INO)
 		#undef HOTT_FW_TELEMETRY
 	#endif
-	#if not defined(HOTT_FW_TELEMETRY) && not defined(DSM_TELEMETRY) && not defined(SPORT_TELEMETRY) && not defined(HUB_TELEMETRY) && not defined(HUBSAN_HUB_TELEMETRY) && not defined(BUGS_HUB_TELEMETRY) && not defined(NCC1701_HUB_TELEMETRY) && not defined(BAYANG_HUB_TELEMETRY) && not defined(CABELL_HUB_TELEMETRY) && not defined(AFHDS2A_HUB_TELEMETRY) && not defined(AFHDS2A_FW_TELEMETRY) && not defined(MULTI_TELEMETRY) && not defined(MULTI_STATUS) && not defined(HITEC_HUB_TELEMETRY) && not defined(HITEC_FW_TELEMETRY) && not defined(SCANNER_TELEMETRY) && not defined(FRSKY_RX_TELEMETRY) && not defined(AFHDS2A_RX_TELEMETRY) && not defined(BAYANG_RX_TELEMETRY) && not defined(DEVO_HUB_TELEMETRY)
+	#if not defined(HOTT_FW_TELEMETRY) && not defined(DSM_TELEMETRY) && not defined(SPORT_TELEMETRY) && not defined(HUB_TELEMETRY) && not defined(HUBSAN_HUB_TELEMETRY) && not defined(BUGS_HUB_TELEMETRY) && not defined(NCC1701_HUB_TELEMETRY) && not defined(BAYANG_HUB_TELEMETRY) && not defined(CABELL_HUB_TELEMETRY) && not defined(AFHDS2A_HUB_TELEMETRY) && not defined(AFHDS2A_FW_TELEMETRY) && not defined(MULTI_TELEMETRY) && not defined(MULTI_STATUS) && not defined(HITEC_HUB_TELEMETRY) && not defined(HITEC_FW_TELEMETRY) && not defined(SCANNER_TELEMETRY) && not defined(FRSKY_RX_TELEMETRY) && not defined(AFHDS2A_RX_TELEMETRY) && not defined(BAYANG_RX_TELEMETRY) && not defined(DEVO_HUB_TELEMETRY) && not defined(V2X2_RX_TELEMETRY)
 		#undef TELEMETRY
 		#undef INVERT_TELEMETRY
 		#undef MULTI_TELEMETRY

Multiprotocol/_Config.h

@@ -227,6 +227,7 @@
 #define	SYMAX_NRF24L01_INO
 #define	TIGER_NRF24L01_INO
 #define	V2X2_NRF24L01_INO
+#define V2X2_RX_NRF24L01_INO
 #define	V761_NRF24L01_INO
 #define	V911S_NRF24L01_INO
 #define	XK_NRF24L01_INO
@@ -313,6 +314,7 @@
 #define AFHDS2A_RX_TELEMETRY		// Forward channels data to TX
 #define HOTT_FW_TELEMETRY			// Forward received telemetry packets to be decoded by erskyTX and OpenTX
 #define BAYANG_RX_TELEMETRY			// Forward channels data to TX
+#define V2X2_RX_TELEMETRY			// Forward channels data to TX
 
 /****************************/
 /*** SERIAL MODE SETTINGS ***/
@@ -707,6 +709,8 @@ const PPM_Parameters PPM_prot[14*NBR_BANKS]=	{
 	PROTO_V2X2
 		V2X2
 		JXD506
+	PROTO_V2X2_RX
+		NONE
 	PROTO_V761
 		NONE
 	PROTO_V911S