/* **************************
* By Midelic on RCGroups *
**************************
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(FRSKYX_CC2500_INO)
#include "iface_cc2500.h"
uint8_t chanskip;
uint8_t calData[48][3];
uint8_t channr;
uint8_t pass_ = 1 ;
uint8_t counter_rst;
uint8_t ctr;
uint8_t FS_flag=0;
// uint8_t ptr[4]={0x01,0x12,0x23,0x30};
//uint8_t ptr[4]={0x00,0x11,0x22,0x33};
const PROGMEM uint8_t hop_data[]={
0x02, 0xD4, 0xBB, 0xA2, 0x89,
0x70, 0x57, 0x3E, 0x25, 0x0C,
0xDE, 0xC5, 0xAC, 0x93, 0x7A,
0x61, 0x48, 0x2F, 0x16, 0xE8,
0xCF, 0xB6, 0x9D, 0x84, 0x6B,
0x52, 0x39, 0x20, 0x07, 0xD9,
0xC0, 0xA7, 0x8E, 0x75, 0x5C,
0x43, 0x2A, 0x11, 0xE3, 0xCA,
0xB1, 0x98, 0x7F, 0x66, 0x4D,
0x34, 0x1B, 0x00, 0x1D, 0x03
};
static uint8_t __attribute__((unused)) hop(uint8_t byte)
{
return pgm_read_byte_near(&hop_data[byte]);
}
static void __attribute__((unused)) set_start(uint8_t ch )
{
cc2500_strobe(CC2500_SIDLE);
cc2500_writeReg(CC2500_23_FSCAL3, calData[ch][0]);
cc2500_writeReg(CC2500_24_FSCAL2, calData[ch][1]);
cc2500_writeReg(CC2500_25_FSCAL1, calData[ch][2]);
cc2500_writeReg(CC2500_0A_CHANNR, ch==47?0:pgm_read_word(&hop_data[ch]));
}
static void __attribute__((unused)) frskyX_init()
{
CC2500_Reset();
for(uint8_t i=0;i<36;i++)
{
uint8_t reg=pgm_read_byte_near(&cc2500_conf[i][0]);
uint8_t val=pgm_read_byte_near(&cc2500_conf[i][1]);
if(reg==CC2500_06_PKTLEN)
val=0x1E;
else
if(reg==CC2500_08_PKTCTRL0)
val=0x01;
else
if(reg==CC2500_0B_FSCTRL1)
val=0x0A;
else
if(reg==CC2500_10_MDMCFG4)
val=0x7B;
else
if(reg==CC2500_11_MDMCFG3)
val=0x61;
else
if(reg==CC2500_12_MDMCFG2)
val=0x13;
else
if(reg==CC2500_15_DEVIATN)
val=0x51;
cc2500_writeReg(reg,val);
}
cc2500_writeReg(CC2500_07_PKTCTRL1, 0x04);
cc2500_writeReg(CC2500_0C_FSCTRL0, option);
cc2500_strobe(CC2500_SIDLE);
//
for(uint8_t c=0;c < 47;c++){//calibrate hop channels
cc2500_strobe(CC2500_SIDLE);
cc2500_writeReg(CC2500_0A_CHANNR,pgm_read_word(&hop_data[c]));
cc2500_strobe(CC2500_SCAL);
delayMicroseconds(900);//
calData[c][0] = cc2500_readReg(CC2500_23_FSCAL3);
calData[c][1] = cc2500_readReg(CC2500_24_FSCAL2);
calData[c][2] = cc2500_readReg(CC2500_25_FSCAL1);
}
cc2500_strobe(CC2500_SIDLE);
cc2500_writeReg(CC2500_0A_CHANNR,0x00);
cc2500_strobe(CC2500_SCAL);
delayMicroseconds(900);
calData[47][0] = cc2500_readReg(CC2500_23_FSCAL3);
calData[47][1] = cc2500_readReg(CC2500_24_FSCAL2);
calData[47][2] = cc2500_readReg(CC2500_25_FSCAL1);
//#######END INIT########
}
static void __attribute__((unused)) initialize_data(uint8_t adr)
{
cc2500_writeReg(CC2500_0C_FSCTRL0,option); // Frequency offset hack
cc2500_writeReg(CC2500_18_MCSM0, 0x8);
cc2500_writeReg(CC2500_09_ADDR, adr ? 0x03 : rx_tx_addr[3]);
cc2500_writeReg(CC2500_07_PKTCTRL1,0x05);
}
static uint8_t __attribute__((unused)) crc_Byte( uint8_t byte )
{
crc = (crc<<8) ^ pgm_read_word(&CRCTable[((uint8_t)(crc>>8) ^ byte) & 0xFF]);
return byte;
}
static uint16_t __attribute__((unused)) scaleForPXX( uint8_t i )
{ //mapped 860,2140(125%) range to 64,1984(PXX values);
return (uint16_t)(((Servo_data[i]-PPM_MIN)*3)>>1)+64;
}
static void __attribute__((unused)) frskyX_build_bind_packet()
{
crc=0;
packet[0] = 0x1D;
packet[1] = 0x03;
packet[2] = 0x01;
//
packet[3] = crc_Byte(rx_tx_addr[3]);
packet[4] = crc_Byte(rx_tx_addr[2]);
int idx = ((state -FRSKY_BIND) % 10) * 5;
packet[5] = crc_Byte(idx);
packet[6] = crc_Byte(pgm_read_word(&hop_data[idx++]));
packet[7] = crc_Byte(pgm_read_word(&hop_data[idx++]));
packet[8] = crc_Byte(pgm_read_word(&hop_data[idx++]));
packet[9] = crc_Byte(pgm_read_word(&hop_data[idx++]));
packet[10] = crc_Byte(pgm_read_word(&hop_data[idx++]));
packet[11] = crc_Byte(0x02);
packet[12] = crc_Byte(RX_num);
//
for(uint8_t i=13;i<28;i++)
packet[i]=crc_Byte(0);
//
packet[28]=highByte(crc);
packet[29]=lowByte(crc);
//
}
static void __attribute__((unused)) frskyX_data_frame()
{
//0x1D 0xB3 0xFD 0x02 0x56 0x07 0x15 0x00 0x00 0x00 0x04 0x40 0x00 0x04 0x40 0x00 0x04 0x40 0x00 0x04 0x40 0x08 0x00 0x00 0x00 0x00 0x00 0x00 0x96 0x12
//
uint8_t lpass = pass_ ;
uint16_t chan_0 ;
uint16_t chan_1 ;
uint8_t flag2 = 0;
uint8_t startChan = 0;
crc = 0;
//static uint8_t p = 0;
//
packet[0] = 0x1D;
packet[1] = rx_tx_addr[3];
packet[2] = rx_tx_addr[2];
packet[3] = crc_Byte(0x02);
//
packet[4] = crc_Byte((ctr<<6)+channr); //*64
packet[5] = crc_Byte(counter_rst);
packet[6] = crc_Byte(RX_num);
// FLAGS 00 - standard packet
//10, 12, 14, 16, 18, 1A, 1C, 1E - failsafe packet
//20 - range check packet
packet[7] = crc_Byte(FS_flag);
packet[8] = crc_Byte(flag2);
//
if ( lpass & 1 )
startChan += 8 ;
for(uint8_t i = 0; i <12 ; i+=3)
{//12 bytes
chan_0 = scaleForPXX(startChan);
if(lpass & 1 )
chan_0+=2048;
packet[9+i] = crc_Byte(lowByte(chan_0));//3 bytes*4
startChan++;
chan_1 = scaleForPXX(startChan);
if(lpass & 1 )
chan_1+= 2048;
startChan++;
packet[9+i+1]=crc_Byte((((chan_0>>8) & 0x0F)|(chan_1 << 4)));
packet[9+i+2]=crc_Byte(chan_1>>4);
}
//packet[21]=crc_Byte(0x08);//first
packet[21]=crc_Byte(0x80);//??? when received first telemetry frame is changed to 0x80
//packet[21]=crc_Byte(ptr[p]);//???
//p=(p+1)%4;//repeating 4 bytes sequence pattern every 4th frame.
pass_=lpass+1;
for (uint8_t i=22;i<28;i++)
packet[i]=crc_Byte(0);
packet[28]=highByte(crc);
packet[29]=lowByte(crc);
}
uint16_t ReadFrSkyX()
{
switch(state)
{
default:
set_start(47);
CC2500_SetPower();
cc2500_strobe(CC2500_SFRX);
//
frskyX_build_bind_packet();
cc2500_strobe(CC2500_SIDLE);
cc2500_writeFifo(packet, packet[0]+1);
state++;
return 9000;
case FRSKY_BIND_DONE:
initialize_data(0);
channr=0;
BIND_DONE;
state++;
break;
case FRSKY_DATA1:
LED_ON;
CC2500_SetTxRxMode(TX_EN);
set_start(channr);
CC2500_SetPower();
cc2500_strobe(CC2500_SFRX);
channr = (channr+chanskip)%47;
cc2500_strobe(CC2500_SIDLE);
cc2500_writeFifo(packet, packet[0]+1);
//
frskyX_data_frame();
state++;
return 5500;
case FRSKY_DATA2:
CC2500_SetTxRxMode(RX_EN);
cc2500_strobe(CC2500_SIDLE);
state++;
return 200;
case FRSKY_DATA3:
cc2500_strobe(CC2500_SRX);
state++;
return 3000;
case FRSKY_DATA4:
len = cc2500_readReg(CC2500_3B_RXBYTES | CC2500_READ_BURST) & 0x7F;
if (len &&(len<MAX_PKT))
{
cc2500_readFifo(pkt, len);
#if defined TELEMETRY
frsky_check_telemetry(pkt,len); //check if valid telemetry packets
//parse telemetry packets here
//The same telemetry function used by FrSky(D8).
#endif
}
state = FRSKY_DATA1;
return 300;
}
return 1;
}
uint16_t initFrSkyX()
{
while(!chanskip)
{
randomSeed((uint32_t)analogRead(A6) << 10 | analogRead(A7));
chanskip=random(0xfefefefe)%47;
}
while((chanskip-ctr)%4)
ctr=(ctr+1)%4;
counter_rst=(chanskip-ctr)>>2;
//for test***************
//rx_tx_addr[3]=0xB3;
//rx_tx_addr[2]=0xFD;
//************************
frskyX_init();
//
if(IS_AUTOBIND_FLAG_on)
{
state = FRSKY_BIND;
initialize_data(1);
}
else
{
state = FRSKY_DATA1;
initialize_data(0);
}
return 10000;
}
#endif