/*
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/>.
*/
// Compatible with FEI XIONG P38 plane.
#if defined(FX_NRF24L01_INO)
#include "iface_xn297.h"
#define FX_BIND_COUNT 300 //3sec
#define FX_SWITCH 20
#define FX_NUM_CHANNELS 4
#define FX816_PACKET_PERIOD 10000
#define FX816_BIND_CHANNEL 40
#define FX816_PAYLOAD_SIZE 6
#define FX816_CH_OFFSET 3
#define FX620_PACKET_PERIOD 3250
#define FX620_BIND_PACKET_PERIOD 4500
#define FX620_BIND_CHANNEL 18
#define FX620_PAYLOAD_SIZE 7
#define FX620_CH_OFFSET 1
#define FX9630_PACKET_PERIOD 8124
#define FX9630_BIND_PACKET_PERIOD 8124
#define FX9630_BIND_CHANNEL 51
#define FX9630_PAYLOAD_SIZE 8
#define FX9630_NUM_CHANNELS 3
//#define FORCE_FX620_ID
//#define FORCE_FX9630_ID
static void __attribute__((unused)) FX_send_packet()
{
//Hopp
if(IS_BIND_DONE)
{
XN297_Hopping(hopping_frequency_no++);
if(sub_protocol == FX9630)
{
XN297_SetTXAddr(rx_tx_addr, 4);
if (hopping_frequency_no > FX9630_NUM_CHANNELS)
hopping_frequency_no = 0;
}
else // FX816 and FX620
{
hopping_frequency_no &= 0x03;
}
}
memset(packet,0x00,packet_length);
//Channels
uint8_t val;
if (sub_protocol == FX9630)
{
packet[0] = convert_channel_8b(THROTTLE);
packet[1] = convert_channel_8b(AILERON);
packet[2] = 0xFF - convert_channel_8b(ELEVATOR);
packet[3] = convert_channel_8b(RUDDER);
packet[4] = 0x20;
packet[5] = GET_FLAG(CH5_SW, 0x01); // DR toggle swich: 0 small throw, 1 large throw
packet[5] |= (Channel_data[CH6] < CHANNEL_MIN_COMMAND ? 0x00 : (Channel_data[CH6] > CHANNEL_MAX_COMMAND ? 0x02 : 0x01)) << 1; // Mode A(0) : 6D small throw, B(1) : 6D large throw, C(2) : 3D
}
else // FX816 and FX620
{
uint8_t offset=sub_protocol == FX816 ? FX816_CH_OFFSET:FX620_CH_OFFSET;
val=convert_channel_8b(AILERON);
if(val>127+FX_SWITCH)
packet[offset] = sub_protocol == FX816 ? 1:0xFF;
else if(val<127-FX_SWITCH)
packet[offset] = sub_protocol == FX816 ? 2:0x00;
else
packet[offset] = sub_protocol == FX816 ? 0:0x7F;
packet[offset+1] = convert_channel_16b_limit(THROTTLE,0,100); //FX816:0x00..0x63, FX620:0x00..0x5E but that should work
}
//Bind and specifics
if(sub_protocol == FX816)
{
if(IS_BIND_IN_PROGRESS)
packet[0] = 0x55;
else
packet[0] = 0xAA;
packet[1] = rx_tx_addr[0];
packet[2] = rx_tx_addr[1];
}
else if(sub_protocol == FX620)
{
if(IS_BIND_IN_PROGRESS)
{
memcpy(packet,rx_tx_addr,3);
packet[3] = hopping_frequency[0];
if(bind_counter > (FX_BIND_COUNT >> 1))
packet[5] = 0x78;
}
else
{
packet[0] = 0x1F; // Is it based on ID??
packet[5] = 0xAB; // Is it based on ID??
}
}
else // FX9630
{
if(IS_BIND_IN_PROGRESS)
{
memcpy(packet,rx_tx_addr, 4);
packet[4] = hopping_frequency[1];
packet[5] = hopping_frequency[2];
packet[7] = 0x55;
}
}
//Check
uint8_t last_packet_idx = packet_length-1;
if (sub_protocol == FX9630 && IS_BIND_IN_PROGRESS)
last_packet_idx--;
val=0;
for(uint8_t i=0;i<last_packet_idx;i++)
val+=packet[i];
if (sub_protocol == FX9630)
val = val ^ 0xFF;
packet[last_packet_idx]=val;
//Debug
#if 0
for(uint8_t i=0;i<packet_length;i++)
debug("%02X ",packet[i]);
debugln("");
#endif
// Send
XN297_SetPower();
XN297_SetTxRxMode(TX_EN);
XN297_WritePayload(packet, packet_length);
}
static void __attribute__((unused)) FX_RF_init()
{
XN297_Configure(XN297_CRCEN, XN297_SCRAMBLED, XN297_1M);
if(sub_protocol == FX816)
{
XN297_SetTXAddr((uint8_t *)"\xcc\xcc\xcc\xcc\xcc", 5);
XN297_RFChannel(FX816_BIND_CHANNEL);
packet_period = FX816_PACKET_PERIOD;
packet_length = FX816_PAYLOAD_SIZE;
}
else if(sub_protocol == FX620)
{
XN297_SetTXAddr((uint8_t *)"\xaa\xbb\xcc", 3);
XN297_RFChannel(FX620_BIND_CHANNEL);
packet_period = FX620_BIND_PACKET_PERIOD;
packet_length = FX620_PAYLOAD_SIZE;
}
else // FX9630
{
XN297_SetTXAddr((uint8_t *)"\x56\x78\x90\x12", 4);
XN297_RFChannel(FX9630_BIND_CHANNEL);
packet_period = FX9630_BIND_PACKET_PERIOD;
packet_length = FX9630_PAYLOAD_SIZE;
}
}
static void __attribute__((unused)) FX_initialize_txid()
{
if(sub_protocol == FX816)
{
//Only 8 IDs: the RX led does not indicate frame loss.
//I didn't open the plane to find out if I could connect there so this is the best I came up with with few trial and errors...
rx_tx_addr[0]=0x35+(rx_tx_addr[3]&0x07); //Original dump=0x35
rx_tx_addr[1]=0x09; //Original dump=0x09
memcpy(hopping_frequency,"\x09\x1B\x30\x42",FX_NUM_CHANNELS); //Original dump=9=0x09,27=0x1B,48=0x30,66=0x42
for(uint8_t i=0;i<FX_NUM_CHANNELS;i++)
hopping_frequency[i]+=rx_tx_addr[3]&0x07;
}
else if(sub_protocol == FX620)
{
rx_tx_addr[0] = rx_tx_addr[3];
hopping_frequency[0] = 0x18 + rx_tx_addr[3]&0x07; // just to try something
#ifdef FORCE_FX620_ID
memcpy(rx_tx_addr,(uint8_t*)"\x34\xA9\x32",3);
hopping_frequency[0] = 0x18; //on dump: 24 34 44 54
#endif
for(uint8_t i=1;i<FX_NUM_CHANNELS;i++)
hopping_frequency[i] = i*10 + hopping_frequency[0];
}
else // FX9630
{
#ifdef FORCE_FX9630_ID
memcpy(rx_tx_addr,(uint8_t*)"\xCE\x31\x9B\x73", 4);
memcpy(hopping_frequency,"\x13\x1A\x38", FX9630_NUM_CHANNELS); //Original dump=19=0x13,26=0x1A,56=0x38
#else
hopping_frequency[0] = 0x13; // constant
hopping_frequency[1] = RX_num & 0x0F + 0x1A;
hopping_frequency[2] = rx_tx_addr[3] & 0x0F + 0x38;
#endif
}
}
uint16_t FX_callback()
{
#ifdef MULTI_SYNC
telemetry_set_input_sync(packet_period);
#endif
if(bind_counter)
if(--bind_counter==0)
{
BIND_DONE;
if(sub_protocol == FX620)
{
XN297_SetTXAddr(rx_tx_addr, 3);
packet_period = FX620_PACKET_PERIOD;
}
}
FX_send_packet();
return packet_period;
}
void FX_init()
{
BIND_IN_PROGRESS; // autobind protocol
FX_initialize_txid();
FX_RF_init();
hopping_frequency_no = 0;
bind_counter=FX_BIND_COUNT;
}
#endif