Scanner 2.4GHz

Thanks to Goebish for this spectrum analyzer.
It will work soon with the OpenTX 2.3 Spectrum Analyser tool.

Multiprotocol/Multi.txt

@@ -51,4 +51,5 @@
 51,Potensic,A20
 52,ZSX,280
 53,Flyzone,FZ-410
+54,Scanner
 63,XN_DUMP,250K,1M,2M

Multiprotocol/Multiprotocol.h

@@ -19,7 +19,7 @@
 #define VERSION_MAJOR		1
 #define VERSION_MINOR		2
 #define VERSION_REVISION	1
-#define VERSION_PATCH_LEVEL	74
+#define VERSION_PATCH_LEVEL	75
 
 //******************
 // Protocols
@@ -80,6 +80,7 @@ enum PROTOCOLS
 	PROTO_POTENSIC	= 51,	// =>NRF24L01
 	PROTO_ZSX		= 52,	// =>NRF24L01
 	PROTO_FLYZONE	= 53,	// =>A7105
+	PROTO_SCANNER	= 54,	// =>CC2500
 	PROTO_XN297DUMP	= 63,	// =>NRF24L01
 };
 
@@ -318,6 +319,7 @@ enum MultiPacketTypes
 	MULTI_TELEMETRY_SYNC			= 8,
 	MULTI_TELEMETRY_SPORT_POLLING	= 9,
 	MULTI_TELEMETRY_HITEC			= 10,
+	MULTI_TELEMETRY_SCANNER			= 11,
 };
 
 // Macros
@@ -636,6 +638,7 @@ Serial: 100000 Baud 8e2      _ xxxx xxxx p --
 					POTENSIC	51
 					ZSX			52
 					FLYZONE		53
+					SCANNER		54
    BindBit=>		0x80	1=Bind/0=No
    AutoBindBit=>	0x40	1=Yes /0=No
    RangeCheck=>		0x20	1=Yes /0=No
@@ -885,4 +888,8 @@ Serial: 100000 Baud 8e2      _ xxxx xxxx p --
    data[3-7] telemetry data
    Full description at the bottom of Hitec_cc2500.ino
 
+   Type 0x0B Spectrum Scanner telemetry data
+   length: 6
+   data[0] = start channel (2400 + x*0.333 Mhz)
+   data[1-5] power levels
 */

Multiprotocol/Multiprotocol.ino

@@ -114,7 +114,12 @@ uint8_t  armed, arm_flags, arm_channel_previous;
 uint8_t  num_ch;
 
 #ifdef CC2500_INSTALLED
+	#ifdef SCANNER_CC2500_INO
+		uint8_t calData[255];
+		#define SCAN_CHANS_PER_PACKET	5
+	#else
 		uint8_t calData[50];
+	#endif
 #endif
 
 #ifdef CHECK_FOR_BOOTLOADER
@@ -643,7 +648,7 @@ uint8_t Update_All()
 	update_led_status();
 	#if defined(TELEMETRY)
 		#if ( !( defined(MULTI_TELEMETRY) || defined(MULTI_STATUS) ) )
-			if( (protocol==PROTO_FRSKYD) || (protocol==PROTO_BAYANG) || (protocol==PROTO_NCC1701) || (protocol==PROTO_BUGS) || (protocol==PROTO_BUGSMINI) || (protocol==PROTO_HUBSAN) || (protocol==PROTO_AFHDS2A) || (protocol==PROTO_FRSKYX) || (protocol==PROTO_DSM) || (protocol==PROTO_CABELL)  || (protocol==PROTO_HITEC))
+			if( (protocol == PROTO_SCANNER) || (protocol==PROTO_FRSKYD) || (protocol==PROTO_BAYANG) || (protocol==PROTO_NCC1701) || (protocol==PROTO_BUGS) || (protocol==PROTO_BUGSMINI) || (protocol==PROTO_HUBSAN) || (protocol==PROTO_AFHDS2A) || (protocol==PROTO_FRSKYX) || (protocol==PROTO_DSM) || (protocol==PROTO_CABELL)  || (protocol==PROTO_HITEC))
 		#endif
 				TelemetryUpdate();
 	#endif
@@ -1016,6 +1021,14 @@ static void protocol_init()
 						remote_callback = ReadHITEC;
 						break;
 				#endif
+				#if defined(SCANNER_CC2500_INO)
+					case PROTO_SCANNER:
+						PE1_off;
+						PE2_on;	//antenna RF2
+						next_callback = initScanner();
+						remote_callback = Scanner_callback;
+						break;
+				#endif
 			#endif
 			#ifdef CYRF6936_INSTALLED
 				#if defined(DSM_CYRF6936_INO)

Multiprotocol/Scanner_cc2500.ino

@@ -0,0 +1,136 @@
+/*
+ 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(SCANNER_CC2500_INO)
+
+#include "iface_cc2500.h"
+
+#define SCAN_MAX_RADIOCHANNEL	249 // 2483 MHz
+#define SCAN_CHANNEL_LOCK_TIME	300 // with precalibration, channel requires only 90 usec for synthesizer to settle
+#define SCAN_AVERAGE_INTVL		30
+
+static uint8_t scan_tlm_index;
+
+enum ScanStates {
+	SCAN_CHANNEL_CHANGE = 0,
+	SCAN_GET_RSSI = 1,
+};
+
+static void __attribute__((unused)) Scanner_cc2500_init()
+{
+	/* Initialize CC2500 chip */
+	CC2500_WriteReg(CC2500_08_PKTCTRL0, 0x12);   // Packet Automation Control
+    CC2500_WriteReg(CC2500_0B_FSCTRL1,  0x0A);   // Frequency Synthesizer Control
+    CC2500_WriteReg(CC2500_0C_FSCTRL0,  0x00);   // Frequency Synthesizer Control
+    CC2500_WriteReg(CC2500_0D_FREQ2,    0x5C);   // Frequency Control Word, High Byte
+    CC2500_WriteReg(CC2500_0E_FREQ1,    0x4E);   // Frequency Control Word, Middle Byte
+    CC2500_WriteReg(CC2500_0F_FREQ0,    0xC3);   // Frequency Control Word, Low Byte
+    CC2500_WriteReg(CC2500_10_MDMCFG4,  0x8D);   // Modem Configuration
+    CC2500_WriteReg(CC2500_11_MDMCFG3,  0x3B);   // Modem Configuration
+    CC2500_WriteReg(CC2500_12_MDMCFG2,  0x10);   // Modem Configuration
+    CC2500_WriteReg(CC2500_13_MDMCFG1,  0x23);   // Modem Configuration
+    CC2500_WriteReg(CC2500_14_MDMCFG0,  0xA4);   // Modem Configuration
+    CC2500_WriteReg(CC2500_15_DEVIATN,  0x62);   // Modem Deviation Setting
+    CC2500_WriteReg(CC2500_18_MCSM0,    0x08);   // Main Radio Control State Machine Configuration
+    CC2500_WriteReg(CC2500_19_FOCCFG,   0x1D);   // Frequency Offset Compensation Configuration
+    CC2500_WriteReg(CC2500_1A_BSCFG,    0x1C);   // Bit Synchronization Configuration
+    CC2500_WriteReg(CC2500_1B_AGCCTRL2, 0xC7);   // AGC Control
+    CC2500_WriteReg(CC2500_1C_AGCCTRL1, 0x00);   // AGC Control
+    CC2500_WriteReg(CC2500_1D_AGCCTRL0, 0xB0);   // AGC Control
+    CC2500_WriteReg(CC2500_21_FREND1,   0xB6);   // Front End RX Configuration
+
+	CC2500_SetTxRxMode(RX_EN);  // Receive mode
+	CC2500_Strobe(CC2500_SIDLE);
+	CC2500_Strobe(CC2500_SRX);
+
+	delayMicroseconds(1000);  // wait for RX to activate
+}
+
+static void __attribute__((unused)) Scanner_calibrate()
+{
+	for (uint8_t c = 0; c < SCAN_MAX_RADIOCHANNEL; c++)
+	{
+		CC2500_Strobe(CC2500_SIDLE);
+		CC2500_WriteReg(CC2500_0A_CHANNR, c);
+		CC2500_Strobe(CC2500_SCAL);
+		delayMicroseconds(900);
+		calData[c] = CC2500_ReadReg(CC2500_25_FSCAL1);
+	}
+	CC2500_Strobe(CC2500_SIDLE);
+}
+
+static void __attribute__((unused)) Scanner_scan_next()
+{
+	CC2500_WriteReg(CC2500_0A_CHANNR, rf_ch_num);
+	CC2500_WriteReg(CC2500_25_FSCAL1, calData[rf_ch_num]);
+	CC2500_Strobe(CC2500_SFRX);
+	CC2500_Strobe(CC2500_SRX);
+}
+
+static int __attribute__((unused)) Scanner_scan_rssi()
+{
+	uint8_t rssi;
+	rssi = CC2500_ReadReg(0x40 | CC2500_34_RSSI);  // 0.5 db/count, RSSI value read from the RSSI status register is a 2's complement number
+	uint8_t rssi_rel;
+	if (rssi >= 128) {
+		rssi_rel = rssi - 128;  // relative power levels 0-127 (equals -137 to -72 dBm)
+	}
+	else {
+		rssi_rel = rssi + 128;  // relativ power levels 128-255 (equals -73 to -10 dBm)
+	}
+	return rssi_rel;
+}
+
+uint16_t Scanner_callback()
+{
+	switch (phase)
+	{
+		case SCAN_CHANNEL_CHANGE:
+			rf_ch_num++;
+			if (rf_ch_num >= (SCAN_MAX_RADIOCHANNEL + 1))
+				rf_ch_num = 0;
+			if (scan_tlm_index++ == 0)
+				pkt[0] = rf_ch_num;  // start channel for telemetry packet
+			Scanner_scan_next();
+			phase = SCAN_GET_RSSI;
+			return SCAN_CHANNEL_LOCK_TIME;
+		case SCAN_GET_RSSI:
+			phase = SCAN_CHANNEL_CHANGE;
+			pkt[scan_tlm_index] = Scanner_scan_rssi();
+			if (scan_tlm_index == SCAN_CHANS_PER_PACKET)
+			{
+				// send data to TX
+				telemetry_link = 1;
+				scan_tlm_index = 0;
+			}
+	}
+	return SCAN_AVERAGE_INTVL;
+}
+
+uint16_t initScanner(void)
+{
+	rf_ch_num = SCAN_MAX_RADIOCHANNEL;
+	scan_tlm_index = 0;
+	phase = SCAN_CHANNEL_CHANGE;
+	Scanner_cc2500_init();
+	CC2500_Strobe(CC2500_SRX);
+	Scanner_calibrate();
+	CC2500_Strobe(CC2500_SIDLE);
+	CC2500_SetTxRxMode(RX_EN);
+	CC2500_Strobe(CC2500_SRX);  // Receive mode
+	return 1250;
+}
+
+#endif

Multiprotocol/Telemetry.ino

@@ -170,6 +170,20 @@ static void multi_send_status()
 	#endif
 #endif
 
+#ifdef SCANNER_TELEMETRY
+	void spectrum_scanner_frame()
+	{
+		#if defined MULTI_TELEMETRY
+			multi_send_header(MULTI_TELEMETRY_SCANNER, SCAN_CHANS_PER_PACKET + 1);
+		#else
+			Serial_write(0xAA);						// Telemetry packet
+		#endif
+		Serial_write(pkt[0]);						// start channel
+		for(uint8_t ch = 0; ch < SCAN_CHANS_PER_PACKET; ch++)
+			Serial_write(pkt[ch+1]);				// RSSI power levels
+	}
+#endif
+
 #ifdef AFHDS2A_FW_TELEMETRY
 	void AFHDSA_short_frame()
 	{
@@ -996,6 +1010,15 @@ void TelemetryUpdate()
 		}
 	#endif
 
+	#if defined SCANNER_TELEMETRY
+		if (telemetry_link && protocol == PROTO_SCANNER)
+		{
+			spectrum_scanner_frame();
+			telemetry_link = 0;
+			return;
+		}
+	#endif
+
 		if((telemetry_link & 1 )&& protocol != PROTO_FRSKYX)
 		{	// FrSkyD + Hubsan + AFHDS2A + Bayang + Cabell + Hitec + Bugs + BugsMini + NCC1701
 			frsky_link_frame();

Multiprotocol/Validate.h

@@ -192,6 +192,7 @@
 	#undef	REDPINE_CC2500_INO
 	#undef	HITEC_CC2500_INO
 	#undef	XN297L_CC2500_EMU
+	#undef	SCANNER_CC2500_INO
 #endif
 #ifndef NRF24L01_INSTALLED
 	#undef	BAYANG_NRF24L01_INO
@@ -248,6 +249,7 @@
 	#undef DSM_TELEMETRY
 	#undef MULTI_STATUS
 	#undef MULTI_TELEMETRY
+	#undef SCANNER_TELEMETRY
 #else
 	#if defined MULTI_TELEMETRY && not defined INVERT_TELEMETRY
 		#warning MULTI_TELEMETRY has been defined but not INVERT_TELEMETRY. They should be both enabled for OpenTX telemetry and status to work.
@@ -291,7 +293,7 @@
 	#if not defined(DSM_CYRF6936_INO)
 		#undef DSM_TELEMETRY
 	#endif
-	#if 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)
+	#if 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)
 		#undef TELEMETRY
 		#undef INVERT_TELEMETRY
 		#undef SPORT_POLLING

Multiprotocol/_Config.h

@@ -175,6 +175,7 @@
 #define	FRSKYV_CC2500_INO
 #define	FRSKYX_CC2500_INO
 #define	HITEC_CC2500_INO
+#define	SCANNER_CC2500_INO
 #define	SFHSS_CC2500_INO
 #define	REDPINE_CC2500_INO
 
@@ -294,6 +295,7 @@
 #define CABELL_HUB_TELEMETRY		// Use FrSkyD Hub format to send telemetry to TX
 #define HITEC_HUB_TELEMETRY			// Use FrSkyD Hub format to send basic telemetry to the radios which can decode it like er9x, ersky9x and OpenTX
 #define HITEC_FW_TELEMETRY			// Under development: Forward received telemetry packets to be decoded by ersky9x and OpenTX
+#define SCANNER_TELEMETRY			// Forward spectrum scanner data to TX
 
 //SPORT_POLLING is an implementation of the same polling routine as XJT module for sport telemetry bidirectional communication.
 //This is useful for passing sport control frames from TX to RX(ex: changing Betaflight PID or VTX channels on the fly using LUA scripts with OpentX).
@@ -611,6 +613,8 @@ const PPM_Parameters PPM_prot[14*NBR_BANKS]=	{
 	PROTO_REDPINE
 		RED_FAST
 		RED_SLOW
+	PROTO_SCANNER
+		NONE
 	PROTO_SFHSS
 		NONE
 	PROTO_SHENQI

Protocols_Details.md

@@ -108,6 +108,7 @@ CFlie|38|CFlie||||||||NRF24L01|
 [Q2X2](Protocols_Details.md#Q2X2---29)|29|Q222|Q242|Q282||||||NRF24L01|
 [Q303](Protocols_Details.md#Q303---31)|31|Q303|CX35|CX10D|CX10WD|||||NRF24L01|XN297
 [Redpine](Protocols_Details.md#Redpine---50)|50|FAST|SLOW|||||||NRF24L01|
+[Scanner](Protocols_Details.md#Scanner---54)|54|||||||||CC2500|
 [SFHSS](Protocols_Details.md#SFHSS---21)|21|SFHSS||||||||CC2500|
 [Shenqi](Protocols_Details.md#Shenqi---19)|19|Shenqi||||||||NRF24L01|LT8900
 [SLT](Protocols_Details.md#SLT---11)|11|SLT_V1|SLT_V2|Q100|Q200|MR100||||NRF24L01|
@@ -381,6 +382,9 @@ CH1|CH2|CH3|CH4|CH5|CH6|CH7|CH8
 ---|---|---|---|---|---|---|---
 A|E|T|R|CH5|CH6|CH7|CH8
 
+## Scanner - *54*
+2.4GHz scanner accessible using the OpenTX 2.3 Spectrum Analyser tool.
+
 ***
 # CYRF6936 RF Module