New protocol EazyRC

Multiprotocol/EazyRC_nrf24l01.ino

@@ -0,0 +1,168 @@
+/*
+ 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(EAZYRC_NRF24L01_INO)
+
+#include "iface_xn297.h"
+
+#define FORCE_EAZYRC_ORIGINAL_ID
+
+#define EAZYRC_PAYLOAD_SIZE			10
+#define EAZYRC_RF_NUM_CHANNELS		4
+#define EAZYRC_BIND_CHANNEL			18
+#define EAZYRC_PACKET_PERIOD		5000
+
+enum {
+	EAZYRC_BINDTX=0,
+	EAZYRC_BINDRX,
+	EAZYRC_PREP_DATA,
+	EAZYRC_PREP_DATA1,
+	EAZYRC_DATA,
+};
+
+static void __attribute__((unused)) EAZYRC_send_packet()
+{
+	//Bind:
+	// TX:    C=18 S=Y A= AA BB CC DD EE P(10)= 1A A0 01 00 00 00 1E 00 78 51
+	//   packet[0..2]=tx_addr, packet[6]=first rf channel, packet[8]=unk, packet[9]=sum(packet[0..8])
+	// RX:    C=18 S=Y A= AA BB CC DD EE P(10)= 41 AD 01 1A A0 01 1E 00 87 4F
+	//   packet[0..2]=rx_addr, packet[3..5]=tx_addr, packet[6]=first rf channel, packet[8]=unk but swapped, packet[9]=sum(packet[0..8])
+	//Normal: C=30 S=Y A= 1A A0 41 AD 02 P(10)= 7F 7F 1F 19 00 00 1E 00 AB FF
+	//   packet[0]=THR, packet[1]=ST, packet[2]=unk, packet[3]=unk, packet[6]=first rf channel, packet[8]=unk, packet[9]=sum(packet[0..8])
+	//Bound : C=18 S=Y A= AA BB CC DD EE P(10)= 1A A0 01 41 AD 01 1E 00 79 41
+	//   packet[0..2]=tx_addr, packet[3..5]=rx_addr, packet[6]=first rf channel, packet[8]=unk, packet[9]=sum(packet[0..8])
+	//   sent every 12 packets in normal mode
+	//Packet period around 5ms with a large jitter
+
+	if(IS_BIND_IN_PROGRESS)
+	{
+		memcpy(&packet,rx_tx_addr,3);
+		memset(&packet[3], 0x00, 5);
+		packet[6] = hopping_frequency[0];
+		packet[8] = 0x78;						//??? packet type?
+	}
+	else
+	{
+		XN297_Hopping(hopping_frequency_no);
+		hopping_frequency_no++;
+		hopping_frequency_no &= 3;
+
+		for(uint8_t i=0;i<2;i++)
+			packet[i] = convert_channel_8b(i);
+		packet[2] = 0x1F;						//??? additional channel?
+		packet[3] = 0x19;						//??? additional channel?
+		memset(&packet[4], 0x00, 4);
+		packet[6] = hopping_frequency[0];
+		packet[8] = 0xAB;						//??? packet type?
+	}
+
+	// Send
+	XN297_SetPower();
+	XN297_SetTxRxMode(TX_EN);
+	XN297_WritePayload(packet, EAZYRC_PAYLOAD_SIZE);
+	#ifdef DEBUG_SERIAL
+		for(uint8_t i=0; i < len; i++)
+			debug("%02X ", packet[i]);
+		debugln();
+	#endif
+}
+
+static void __attribute__((unused)) EAZYRC_initialize_txid()
+{
+	rx_tx_addr[1] = rx_tx_addr[3];
+	hopping_frequency[0] = (rx_tx_addr[3]%0x1F) + 0x1E;		// Wild guess...
+	#ifdef FORCE_EAZYRC_ORIGINAL_ID
+		rx_tx_addr[0] = 0x1A;
+		rx_tx_addr[1] = 0xA0;
+		rx_tx_addr[2] = 0x01;
+		hopping_frequency[0] = 0x1E;
+	#endif
+	rx_tx_addr[2] = 0x01;									// Not sure if this is needed...
+	for(uint8_t i=1; i<EAZYRC_RF_NUM_CHANNELS; i++)
+		hopping_frequency[i] = hopping_frequency[0] + 10*i;
+}
+
+static void __attribute__((unused)) EAZYRC_RF_init()
+{
+	XN297_Configure(XN297_CRCEN, XN297_SCRAMBLED, XN297_1M);
+	XN297_SetTXAddr((uint8_t*)"\xAA\xBB\xCC\xDD\xEE", 5);
+	XN297_SetRXAddr((uint8_t*)"\xAA\xBB\xCC\xDD\xEE", EAZYRC_PAYLOAD_SIZE);
+	XN297_RFChannel(EAZYRC_BIND_CHANNEL);
+}
+
+uint16_t EAZYRC_callback()
+{
+	uint8_t rf,n;
+	uint16_t addr;
+	switch(phase)
+	{
+		case EAZYRC_BINDTX:
+			if(XN297_IsRX())
+			{
+				//Example:	TX: C=18 S=Y A= AA BB CC DD EE P(10)= 1A A0 01 00 00 00 1E 00 78 51
+				// packet[0..2]=tx_addr, packet[6]=first rf channel, packet[8]=unk, packet[9]=sum(packet[0..8])
+				//			RX: C=18 S=Y A= AA BB CC DD EE P(10)= 41 AD 01 1A A0 01 1E 00 87 4F
+				// packet[0..2]=rx_addr, packet[3..5]=tx_addr, packet[6]=first rf channel, packet[8]=unk but swapped, packet[9]=sum(packet[0..8])
+				XN297_ReadPayload(packet_in, EAZYRC_PAYLOAD_SIZE);
+				#ifdef DEBUG_SERIAL
+					for(uint8_t i=0; i < EAZYRC_PAYLOAD_SIZE; i++)
+						debug("%02X ", packet_in[i]);
+					debugln();
+				#endif
+				//could check the validity of the packet by looking at the sum...
+				if(memcmp(&packet_in[3],&rx_tx_addr,3)==0)
+				{//TX ID match, TX addr to use: 1A A0 41 AD 02
+					rx_tx_addr[4] = rx_tx_addr[2] + packet_in[2];	//wild guess
+					rx_tx_addr[2] = packet_in[0];
+					rx_tx_addr[3] = packet_in[1];
+					BIND_DONE;
+					XN297_SetTxRxMode(TXRX_OFF);
+					XN297_SetTXAddr(rx_tx_addr, 5);
+					phase = EAZYRC_DATA;
+					return 5000;
+				}
+			}
+			XN297_SetTxRxMode(TXRX_OFF);
+			EAZYRC_send_packet();
+			phase++;
+			return 1000;
+		case EAZYRC_BINDRX:
+			//Wait for the packet transmission to finish
+			while(XN297_IsPacketSent()==false);
+			//Switch to RX
+			XN297_SetTxRxMode(TXRX_OFF);
+			XN297_SetTxRxMode(RX_EN);
+			phase = EAZYRC_BINDTX;
+			return 10000;
+		case EAZYRC_DATA:
+			#ifdef MULTI_SYNC
+				telemetry_set_input_sync(EAZYRC_PACKET_PERIOD);
+			#endif
+			EAZYRC_send_packet();
+			break;
+	}
+	return EAZYRC_PACKET_PERIOD;
+}
+
+void EAZYRC_init()
+{
+	BIND_IN_PROGRESS;
+	EAZYRC_initialize_txid();
+	EAZYRC_RF_init();
+	phase = EAZYRC_BINDTX;
+	packet_count = 0;
+	hopping_frequency_no = 0;
+}
+
+#endif