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https://github.com/pascallanger/DIY-Multiprotocol-TX-Module.git
synced 2026-01-13 12:13:17 +00:00
MT99xx: Added voltage telemetry for the Dragon sub protocol
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Pascal Langer
@@ -24,13 +24,20 @@
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#define MT99XX_PACKET_PERIOD_MT 2625
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#define MT99XX_PACKET_PERIOD_YZ 3125
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#define MT99XX_PACKET_PERIOD_A180 3400 // timing changes between the packets 2 x 27220 then 1x 26080, it seems that it is only on the first RF channel which jitters by 1.14ms but hard to pinpoint with XN297dump
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#define MT99XX_PACKET_PERIOD_DRAGON 1038 // there is a pause of 2x1038 between the packets 3 and 4 from what XN297dump detects which I think are used for telemetry
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#define MT99XX_PACKET_PERIOD_DRAGON 1038 // there is a pause of 2x1038 between two packets, no idea why and how since it is not even stable on a same dump...
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#define MT99XX_PACKET_PERIOD_DRAGON_TELEM 10265 // long pause to receive the telemetry packets, 3 are sent by the RX one after the other
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#define MT99XX_INITIAL_WAIT 500
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#define MT99XX_PACKET_SIZE 9
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//#define FORCE_A180_ID
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//#define FORCE_DRAGON_ID
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enum {
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MT99XX_DATA,
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MT99XX_RX,
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MT99XX_CHECK,
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};
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enum{
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// flags going to packet[6] (MT99xx, H7)
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FLAG_MT_RATE1 = 0x01, // (H7 & A180 high rate)
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@@ -68,12 +75,6 @@ enum{
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FLAG_DRAGON_UNK = 0x04,
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};
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enum {
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MT99XX_INIT = 0,
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MT99XX_BIND,
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MT99XX_DATA
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};
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const uint8_t h7_mys_byte[] = {
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0x01, 0x11, 0x02, 0x12, 0x03, 0x13, 0x04, 0x14,
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0x05, 0x15, 0x06, 0x16, 0x07, 0x17, 0x00, 0x10
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@@ -88,7 +89,7 @@ const uint8_t ls_mys_byte[] = {
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const uint8_t yz_p4_seq[] = {0xa0, 0x20, 0x60};
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#ifdef DRAGON_HUB_TELEMETRY
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#ifdef MT99XX_HUB_TELEMETRY
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const uint8_t DRAGON_seq[] = {0x20, 0x60, 0x20, 0x80};
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#endif
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@@ -189,12 +190,8 @@ static void __attribute__((unused)) MT99XX_send_packet()
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packet[6] = FLAG_DRAGON_RATE
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| GET_FLAG( CH6_SW, FLAG_DRAGON_RTH );
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#ifdef DRAGON_HUB_TELEMETRY
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#ifdef MT99XX_HUB_TELEMETRY
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//Telemetry
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// C=48 S=Y A= 6C 00 22 CC CC P(9)= 6C 00 22 27 00 00 00 00 60
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// C=48 S=Y A= 6C 00 22 CC CC P(9)= 6C 00 22 28 00 00 00 00 61
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// C=18 S=Y A= 6C 00 22 CC CC P(9)= 6C 00 22 24 00 00 00 00 5D
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// 6C 00 22 = TX address, 27/28/24=vbatt, check = sum(P[0..7]) + AB, where AB comes from? Is it constant?
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if(hopping_frequency_no == 0)
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{
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seq_num++;
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@@ -204,7 +201,10 @@ static void __attribute__((unused)) MT99XX_send_packet()
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packet_count = 0;
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}
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if(packet_count > 10) // Telemetry packet request every 10 or 11 packets
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{
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packet[6] |= 0x04; // Request telemetry flag
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phase = MT99XX_RX;
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}
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packet[7] = DRAGON_seq[seq_num]; // seq: 20 80 20 60 20 80 20 60... 80 changes to 80+batt from telem
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if(seq_num==3)
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packet[7] |= v_lipo1;
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@@ -254,14 +254,6 @@ static void __attribute__((unused)) MT99XX_send_packet()
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else // MT99 & H7 & YZ & A180 & DRAGON
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XN297_Hopping(hopping_frequency_no);
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if(sub_protocol == DRAGON)
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{
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if(hopping_frequency_no == 6)
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packet_period = 3 * MT99XX_PACKET_PERIOD_DRAGON; // hole probably for the telemetry
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else
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packet_period = MT99XX_PACKET_PERIOD_DRAGON;
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}
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hopping_frequency_no++;
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if(sub_protocol == YZ || sub_protocol == A180 || sub_protocol == DRAGON )
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hopping_frequency_no++; // skip every other channel
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@@ -283,6 +275,10 @@ static void __attribute__((unused)) MT99XX_RF_init()
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XN297_Configure(XN297_CRCEN, XN297_SCRAMBLED, XN297_1M);
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XN297_SetTXAddr((uint8_t *)"\xCC\xCC\xCC\xCC\xCC", 5);
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XN297_HoppingCalib(16);
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#ifdef MT99XX_HUB_TELEMETRY
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XN297_SetRXAddr(rx_tx_addr, MT99XX_PACKET_SIZE);
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#endif
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}
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static void __attribute__((unused)) MT99XX_initialize_txid()
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@@ -343,27 +339,71 @@ static void __attribute__((unused)) MT99XX_initialize_txid()
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uint16_t MT99XX_callback()
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{
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#ifdef MULTI_SYNC
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telemetry_set_input_sync(packet_period);
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#endif
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if(bind_counter)
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switch(phase)
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{
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bind_counter--;
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if (bind_counter == 0)
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{
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// set tx address for data packets
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XN297_SetTXAddr(rx_tx_addr, 5);
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// set rf channels
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uint8_t channel_offset = ((crc8>>4) + (crc8 & 0x0f)) % 8;
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for(uint8_t i=0;i<16;i++)
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hopping_frequency[i] += channel_offset;
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XN297_HoppingCalib(16);
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BIND_DONE;
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}
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case MT99XX_DATA:
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#ifdef MULTI_SYNC
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telemetry_set_input_sync(packet_period);
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#endif
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if(bind_counter)
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{
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bind_counter--;
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if (bind_counter == 0)
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{
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// set tx address for data packets
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XN297_SetTXAddr(rx_tx_addr, 5);
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// set rf channels
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uint8_t channel_offset = ((crc8>>4) + (crc8 & 0x0f)) % 8;
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for(uint8_t i=0;i<16;i++)
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hopping_frequency[i] += channel_offset;
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XN297_HoppingCalib(16);
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BIND_DONE;
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}
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}
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MT99XX_send_packet();
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break;
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#ifdef MT99XX_HUB_TELEMETRY
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case MT99XX_RX:
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//Switch to RX
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XN297_SetTxRxMode(TXRX_OFF);
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XN297_SetTxRxMode(RX_EN);
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phase++;
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return MT99XX_PACKET_PERIOD_DRAGON_TELEM - MT99XX_PACKET_PERIOD_DRAGON - 500;
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case MT99XX_CHECK:
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//Check telem
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if(XN297_IsRX())
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{
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//debug("RX");
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if(XN297_ReadPayload(packet_in, MT99XX_PACKET_SIZE))
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{
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// C=48 S=Y A= 6C 00 22 CC CC P(9)= 6C 00 22 27 00 00 00 00 60
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// C=48 S=Y A= 6C 00 22 CC CC P(9)= 6C 00 22 28 00 00 00 00 61
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// C=18 S=Y A= 6C 00 22 CC CC P(9)= 6C 00 22 24 00 00 00 00 5D
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// 6C 00 22 = TX address, 27/28/24=vbatt, check = sum(P[0..7]) + AB
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// D2 EE 00 25 00 00 00 00 90 -> check also + AB
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//for(uint8_t i=0; i<MT99XX_PACKET_SIZE; i++)
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// debug(" %02X",packet_in[i]);
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uint8_t check=0xAB;
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for(uint8_t i=0; i<8; i++)
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check += packet_in[i];
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if(packet_in[8] == check && packet_in[0] == rx_tx_addr[0] && packet_in[1] == rx_tx_addr[1] && packet_in[2] == rx_tx_addr[2])
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{ // checksum and address are ok
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// debug(" OK");
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v_lipo1 = packet_in[3];
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RX_RSSI=100;
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telemetry_link = 1;
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}
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}
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//debugln("");
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}
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//Switch to TX
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XN297_SetTxRxMode(TXRX_OFF);
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XN297_SetTxRxMode(TX_EN);
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phase=MT99XX_DATA;
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return 500;
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#endif
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}
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MT99XX_send_packet();
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return packet_period;
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return packet_period;
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}
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void MT99XX_init(void)
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@@ -378,5 +418,6 @@ void MT99XX_init(void)
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packet_period = MT99XX_PACKET_PERIOD_MT;
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packet_count=0;
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phase=MT99XX_DATA;
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}
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#endif
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