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DIY-Multiprotocol-TX-Module/Multiprotocol/Hitec_cc2500.ino
Pascal Langer 73dd63caa1 Hitec telemetry comments
2018-08-08 00:37:59 +02:00

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/*
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(HITEC_CC2500_INO)
#include "iface_cc2500.h"
//#define HITEC_FORCE_ID //Use the ID and hopping table from the original dump
#define HITEC_COARSE 0
#define HITEC_PACKET_LEN 13
#define HITEC_TX_ID_LEN 2
#define HITEC_BIND_COUNT 444 // 10sec
#define HITEC_NUM_FREQUENCE 21
#define HITEC_BIND_NUM_FREQUENCE 14
enum {
HITEC_START = 0x00,
HITEC_CALIB = 0x01,
HITEC_PREP = 0x02,
HITEC_DATA1 = 0x03,
HITEC_DATA2 = 0x04,
HITEC_DATA3 = 0x05,
HITEC_DATA4 = 0x06,
HITEC_RX1 = 0x07,
HITEC_RX2 = 0x08,
};
#define HITEC_FREQ0_VAL 0xE8
const PROGMEM uint8_t HITEC_init_values[] = {
/* 00 */ 0x2F, 0x2E, 0x2F, 0x07, 0xD3, 0x91, 0xFF, 0x04,
/* 08 */ 0x45, 0x00, 0x00, 0x12, 0x00, 0x5C, 0x85, HITEC_FREQ0_VAL + HITEC_COARSE,
/* 10 */ 0x3D, 0x3B, 0x73, 0x73, 0x7A, 0x01, 0x07, 0x30,
/* 18 */ 0x08, 0x1D, 0x1C, 0xC7, 0x00, 0xB0, 0x87, 0x6B,
/* 20 */ 0xF8, 0xB6, 0x10, 0xEA, 0x0A, 0x00, 0x11
};
static void __attribute__((unused)) HITEC_CC2500_init()
{
CC2500_Strobe(CC2500_SIDLE);
for (uint8_t i = 0; i < 39; ++i)
CC2500_WriteReg(i, pgm_read_byte_near(&HITEC_init_values[i]));
prev_option = option;
CC2500_WriteReg(CC2500_0C_FSCTRL0, option);
CC2500_SetTxRxMode(TX_EN);
CC2500_SetPower();
}
// Generate RF channels
static void __attribute__((unused)) HITEC_RF_channels()
{
//Normal hopping
uint8_t idx = 0;
uint32_t rnd = MProtocol_id;
while (idx < HITEC_NUM_FREQUENCE)
{
uint8_t i;
uint8_t count_0_47 = 0, count_48_93 = 0, count_94_140 = 0;
rnd = rnd * 0x0019660D + 0x3C6EF35F; // Randomization
// Use least-significant byte and make sure it's pair.
uint8_t next_ch = ((rnd >> 8) % 141) & 0xFE;
// Check that it's not duplicated and spread uniformly
for (i = 0; i < idx; i++) {
if(hopping_frequency[i] == next_ch)
break;
if(hopping_frequency[i] <= 47)
count_0_47++;
else if (hopping_frequency[i] <= 93)
count_48_93++;
else
count_94_140++;
}
if (i != idx)
continue;
if ( (next_ch <= 47 && count_0_47 < 8) || (next_ch >= 48 && next_ch <= 93 && count_48_93 < 8) || (next_ch >= 94 && count_94_140 < 8) )
hopping_frequency[idx++] = next_ch;//find hopping frequency
}
}
static void __attribute__((unused)) HITEC_tune_chan()
{
CC2500_Strobe(CC2500_SIDLE);
if(IS_BIND_IN_PROGRESS)
CC2500_WriteReg(CC2500_0A_CHANNR, hopping_frequency_no*10);
else
CC2500_WriteReg(CC2500_0A_CHANNR, hopping_frequency[hopping_frequency_no]);
CC2500_Strobe(CC2500_SFTX);
CC2500_Strobe(CC2500_SCAL);
CC2500_Strobe(CC2500_STX);
}
static void __attribute__((unused)) HITEC_change_chan_fast()
{
CC2500_Strobe(CC2500_SIDLE);
if(IS_BIND_IN_PROGRESS)
CC2500_WriteReg(CC2500_0A_CHANNR, hopping_frequency_no*10);
else
CC2500_WriteReg(CC2500_0A_CHANNR, hopping_frequency[hopping_frequency_no]);
CC2500_WriteReg(CC2500_25_FSCAL1, calData[hopping_frequency_no]);
}
static void __attribute__((unused)) HITEC_build_packet()
{
static boolean F5_frame=false;
static uint8_t F5_counter=0;
uint8_t offset;
packet[1] = rx_tx_addr[1];
packet[2] = rx_tx_addr[2];
packet[3] = rx_tx_addr[3];
packet[22] = 0xEE; // unknown always 0xEE
if(IS_BIND_IN_PROGRESS)
{
packet[0] = 0x16; // 22 bytes to follow
memset(packet+5,0x00,14);
switch(bind_phase)
{
case 0x72: // first part of the hopping table
for(uint8_t i=0;i<14;i++)
packet[5+i]=hopping_frequency[i]>>1;
break;
case 0x73: // second part of the hopping table
for(uint8_t i=0;i<7;i++)
packet[5+i]=hopping_frequency[i+14]>>1;
break;
case 0x74:
packet[7]=0x55; // unknown but bind does not complete if not there
packet[8]=0x55; // unknown but bind does not complete if not there
break;
case 0x7B:
packet[5]=hopping_frequency[13]>>1; // if not there the Optima link is jerky...
break;
}
if(sub_protocol==OPTIMA)
packet[4] = bind_phase; // increments based on RX answer
else
packet[4] = bind_phase+0x10;
packet[19] = 0x08; // packet sequence
offset=20; // packet[20] and [21]
}
else
{
packet[0] = 0x1A; // 26 bytes to follow
for(uint8_t i=0;i<9;i++)
{
uint16_t ch = convert_channel_16b_nolimit(i,0x1B87,0x3905);
packet[4+2*i] = ch >> 8;
packet[5+2*i] = ch & 0xFF;
}
packet[23] = 0x80; // packet sequence
offset=24; // packet[24] and [25]
packet[26] = 0x00; // unknown always 0 and the RX doesn't seem to care about the value?
}
if(F5_frame)
{// No idea what it is but Minima RXs are expecting these frames to work to work
packet[offset] = 0xF5;
packet[offset+1] = 0xDF;
if((F5_counter%9)==0)
packet[offset+1] -= 0x04; // every 8 packets send 0xDB
F5_counter++;
F5_counter%=59; // every 6 0xDB packets wait only 4 to resend instead of 8
F5_frame=false; // alternate
if(IS_BIND_IN_PROGRESS)
packet[offset+1]++; // when binding the values are 0xE0 and 0xDC
}
else
{
packet[offset] = 0x00;
packet[offset+1] = 0x00;
F5_frame=true; // alternate
}
/* debug("P:");
for(uint8_t i=0;i<packet[0]+1;i++)
debug("%02X,",packet[i]);
debugln("");
*/
}
static void __attribute__((unused)) HITEC_send_packet()
{
CC2500_WriteData(packet, packet[0]+1);
if(IS_BIND_IN_PROGRESS)
{
packet[19] >>= 1; // packet sequence
if( (packet[4] & 0xFE) ==0x82 )
{ // Minima
packet[4] ^= 1; // alternate 0x82 and 0x83
if( packet[4] & 0x01 )
for(uint8_t i=0;i<7;i++) // 0x83
packet[5+i]=hopping_frequency[i+14]>>1;
else
for(uint8_t i=0;i<14;i++) // 0x82
packet[5+i]=hopping_frequency[i]>>1;
}
}
else
packet[23] >>= 1; // packet sequence
}
uint16_t ReadHITEC()
{
switch(phase)
{
case HITEC_START:
HITEC_CC2500_init();
bind_phase=0x72;
if(IS_BIND_IN_PROGRESS)
{
bind_counter = HISKY_BIND_COUNT;
rf_ch_num=HITEC_BIND_NUM_FREQUENCE;
}
else
{
bind_counter=0;
rf_ch_num=HITEC_NUM_FREQUENCE;
//Set TXID
CC2500_WriteReg(CC2500_05_SYNC0,rx_tx_addr[2]);
CC2500_WriteReg(CC2500_04_SYNC1,rx_tx_addr[3]);
}
hopping_frequency_no=0;
HITEC_tune_chan();
phase = HITEC_CALIB;
return 2000;
case HITEC_CALIB:
calData[hopping_frequency_no]=CC2500_ReadReg(CC2500_25_FSCAL1);
hopping_frequency_no++;
if (hopping_frequency_no < rf_ch_num)
HITEC_tune_chan();
else
{
hopping_frequency_no = 0;
phase = HITEC_PREP;
}
return 2000;
/* Work cycle: 22.5ms */
#define HITEC_PACKET_PERIOD 22500
#define HITEC_PREP_TIMING 462
#define HITEC_DATA_TIMING 2736
#define HITEC_RX1_TIMING 4636
case HITEC_PREP:
if ( prev_option == option )
{ // No user frequency change
HITEC_change_chan_fast();
hopping_frequency_no++;
if(hopping_frequency_no>=rf_ch_num)
hopping_frequency_no=0;
CC2500_SetPower();
CC2500_SetTxRxMode(TX_EN);
HITEC_build_packet();
phase++;
}
else
phase = HITEC_START; // Restart the tune process if option is changed to get good tuned values
return HITEC_PREP_TIMING;
case HITEC_DATA1:
case HITEC_DATA2:
case HITEC_DATA3:
case HITEC_DATA4:
HITEC_send_packet();
phase++;
return HITEC_DATA_TIMING;
case HITEC_RX1:
CC2500_SetTxRxMode(RX_EN);
CC2500_Strobe(CC2500_SRX); // Turn RX ON
phase++;
return HITEC_RX1_TIMING;
case HITEC_RX2:
uint8_t len=CC2500_ReadReg(CC2500_3B_RXBYTES | CC2500_READ_BURST) & 0x7F;
if(len && len<MAX_PKT)
{ // Something has been received
CC2500_ReadData(pkt, len);
if( (pkt[len-1] & 0x80) && pkt[0]==len-3 && pkt[1]==rx_tx_addr[1] && pkt[2]==rx_tx_addr[2] && pkt[3]==rx_tx_addr[3])
{ //valid crc && length ok && tx_id ok
debug("RX:l=%d",len);
for(uint8_t i=0;i<len;i++)
debug(",%02X",pkt[i]);
if(IS_BIND_IN_PROGRESS)
{
if(len==13) // Bind packets have a length of 13
{ // bind packet: 0A,00,E5,F2,7X,05,06,07,08,09,00
debug(",bind");
boolean check=true;
for(uint8_t i=5;i<=10;i++)
if(pkt[i]!=i%10) check=false;
if((pkt[4]&0xF0)==0x70 && check)
{
bind_phase=pkt[4]+1;
if(bind_phase==0x7B)
bind_counter=164; // in dumps the RX stops to reply at 0x7B so wait a little and exit
}
}
}
else
if( len==15 && pkt[4]==0 && pkt[12]==0 )
{ // Valid telemetry packets
// no station:
// 0C,1C,A1,2B,00,00,00,00,00,00,00,8D,00,64,8E -> 00 8D=>RX battery voltage 0x008D/28=5.03V
// with HTS-SS:
// 0C,1C,A1,2B,00,11,AF,00,2D,00,8D,11,00,4D,96 -> 00 8D=>RX battery voltage 0x008D/28=5.03V
// 0C,1C,A1,2B,00,12,00,00,00,00,00,12,00,52,93
// 0C,1C,A1,2B,00,13,00,00,00,00,46,13,00,52,8B -> 46=>temperature2 0x46-0x28=30°C
// 0C,1C,A1,2B,00,14,00,00,00,00,41,14,00,2C,93 -> 41=>temperature1 0x41-0x28=25°C
// 0C,1C,A1,2B,00,15,00,2A,00,0E,00,15,00,44,96 -> 2A 00=>rpm1=420, 0E 00=>rpm2=140
// 0C,1C,A1,2B,00,16,00,00,00,00,00,16,00,2C,8E
// 0C,1C,A1,2B,00,17,00,00,00,42,44,17,00,48,8D -> 42=>temperature3 0x42-0x28=26°C,44=>temperature4 0x44-0x28=28°C
// 0C,1C,A1,2B,00,18,00,00,00,00,00,18,00,50,92
debug(",telem");
#if defined(HITEC_HUB_TELEMETRY)
switch(pkt[5]) // telemetry frame number
{
case 0:
v_lipo1 = (pkt[12])<<5 | (pkt[11])>>3; // calculation in decimal is volt=(pkt[12]<<8+pkt[11])/28
break;
case 11:
v_lipo1 = (pkt[11])<<5 | (pkt[10])>>3; // calculation in decimal is volt=(pkt[11]<<8+pkt[10])/28
break;
case 18:
v_lipo2 = (pkt[6])<<5 | (pkt[7])>>3; // calculation in decimal is volt=(pkt[6]<<8+pkt[7])/10
break;
}
TX_RSSI = pkt[13];
if(TX_RSSI >=128)
TX_RSSI -= 128;
else
TX_RSSI += 128;
TX_LQI = pkt[14]&0x7F;
telemetry_link=1; // telemetry hub available
#elif defined(HITEC_FW_TELEMETRY)
// 8 bytes telemetry packets => see at the end of this file how to fully decode it
pkt[0]=pkt[13]; // TX RSSI
pkt[1]=pkt[14]&0x7F; // LQI
uint8_t offset=pkt[5]==0?1:0;
for(uint8_t i=5;i < 11; i++)
pkt[i-3]=pkt[i+offset]; // frame number followed by 5 bytes of data
telemetry_link=2; // telemetry forward available
#endif
}
debugln("");
}
}
CC2500_Strobe(CC2500_SFRX); // Flush the RX FIFO buffer
phase = HITEC_PREP;
if(bind_counter)
{
bind_counter--;
if(!bind_counter)
{
BIND_DONE;
phase=HITEC_START;
}
}
return (HITEC_PACKET_PERIOD -HITEC_PREP_TIMING -4*HITEC_DATA_TIMING -HITEC_RX1_TIMING);
}
return 0;
}
uint16_t initHITEC()
{
HITEC_RF_channels();
#ifdef HITEC_FORCE_ID // ID and channels taken from dump
rx_tx_addr[1]=0x00;
rx_tx_addr[2]=0x03;
rx_tx_addr[3]=0x6A;
memcpy((void *)hopping_frequency,(void *)"\x00\x3A\x4A\x32\x0C\x58\x2A\x10\x26\x20\x08\x60\x68\x70\x78\x80\x88\x56\x5E\x66\x6E",HITEC_NUM_FREQUENCE);
#endif
#if defined(HITEC_HUB_TELEMETRY)
init_frskyd_link_telemetry();
#endif
phase = HITEC_START;
return 10000;
}
/* Full telemetry
packet[0] = TX RSSI value
packet[1] = TX LQI value
packet[2] = frame number
packet[3-7] telemetry data
The frame number takes the following values: 0x00, 0x11, 0x12, ..., 0x18. The frames can be present or not, they also do not have to follow each others.
Here is a description of the telemetry data for each frame number:
- frame 0x00
data byte 0 -> 0x00 unknown
data byte 1 -> 0x00 unknown
data byte 2 -> 0x00 unknown
data byte 3 -> RX Batt Volt_H
data byte 4 -> RX Batt Volt_L => RX Batt=(Volt_H*256+Volt_L)/28
- frame 0x11
data byte 0 -> 0xAF start of frame
data byte 1 -> 0x00 unknown
data byte 2 -> 0x2D frame type but constant here
data byte 3 -> Volt1_H
data byte 4 -> Volt1_L RX Batt=(Volt1_H*256+Volt1_L)/28 V
- frame 0x12
data byte 0 -> Lat_sec_H GPS : latitude second
data byte 1 -> Lat_sec_L signed int : 1/100 of second
data byte 2 -> Lat_deg_min_H GPS : latitude degree.minute
data byte 3 -> Lat_deg_min_L signed int : +=North, - = south
data byte 4 -> Time_second GPS Time
- frame 0x13
data byte 0 -> GPS Longitude second
data byte 1 -> signed int : 1/100 of second
data byte 2 -> GPS Longitude degree.minute
data byte 3 -> signed int : +=Est, - = west
data byte 4 -> Temp2 Temperature2=Temp2-40°C
- frame 0x14
data byte 0 -> Speed_H
data byte 1 -> Speed_L Speed=Speed_H*256+Speed_L km/h
data byte 2 -> Alti_sea_H
data byte 3 -> Alti_sea_L Altitude sea=Alti_sea_H*256+Alti_sea_L m
data byte 4 -> Temp1 Temperature1=Temp1-40°C
- frame 0x15
data byte 0 -> FUEL
data byte 1 -> RPM1_L
data byte 2 -> RPM1_H RPM1=RPM1_H*256+RPM1_L
data byte 3 -> RPM2_L
data byte 4 -> RPM2_H RPM2=RPM2_H*256+RPM2_L
- frame 0x16
data byte 0 -> Date_year GPS Date
data byte 1 -> Date_month
data byte 2 -> Date_day
data byte 3 -> Time_hour GPS Time
data byte 4 -> Time_min
- frame 0x17
data byte 0 -> 0x00 COURSEH
data byte 1 -> 0x00 COURSEL GPS Course = COURSEH*256+COURSEL
data byte 2 -> 0x00 GPS count
data byte 3 -> Temp3 Temperature3=Temp2-40°C
data byte 4 -> Temp4 Temperature4=Temp3-40°C
- frame 0x18
data byte 1 -> Volt2_H
data byte 2 -> Volt2_L Volt2=(Volt2_H*256+Volt2_L)/10 V
data byte 3 -> AMP1_L
data byte 4 -> AMP1_H Amp=(AMP1_H*256+AMP1_L -180)/14 in signed A
*/
#endif
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