mirror of
https://github.com/pascallanger/DIY-Multiprotocol-TX-Module.git
synced 2025-02-04 19:58:13 +00:00
317 lines
7.6 KiB
C++
317 lines
7.6 KiB
C++
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/* **************************
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* By Midelic on RCGroups *
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**************************
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This project is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Multiprotocol is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Multiprotocol. If not, see <http://www.gnu.org/licenses/>.
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*/
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#if defined(FRSKYX_CC2500_INO)
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#include "iface_cc2500.h"
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uint8_t chanskip;
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uint8_t counter_rst;
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uint8_t ctr;
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uint8_t seq_last_sent;
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uint8_t seq_last_rcvd;
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static void __attribute__((unused)) set_start(uint8_t ch )
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{
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CC2500_Strobe(CC2500_SIDLE);
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CC2500_WriteReg(CC2500_25_FSCAL1, calData[ch]);
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CC2500_WriteReg(CC2500_0A_CHANNR, hopping_frequency[ch]);
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}
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static void __attribute__((unused)) frskyX_init()
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{
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for(uint8_t i=0;i<36;i++)
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{
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uint8_t reg=pgm_read_byte_near(&cc2500_conf[i][0]);
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uint8_t val=pgm_read_byte_near(&cc2500_conf[i][1]);
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if(reg==CC2500_06_PKTLEN)
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val=0x1E;
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else
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if(reg==CC2500_08_PKTCTRL0)
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val=0x01;
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else
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if(reg==CC2500_0B_FSCTRL1)
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val=0x0A;
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else
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if(reg==CC2500_10_MDMCFG4)
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val=0x7B;
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else
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if(reg==CC2500_11_MDMCFG3)
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val=0x61;
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else
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if(reg==CC2500_12_MDMCFG2)
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val=0x13;
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else
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if(reg==CC2500_15_DEVIATN)
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val=0x51;
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CC2500_WriteReg(reg,val);
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}
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CC2500_WriteReg(CC2500_07_PKTCTRL1, 0x04);
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prev_option = option ;
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CC2500_WriteReg(CC2500_0C_FSCTRL0, option);
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CC2500_Strobe(CC2500_SIDLE);
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//
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for(uint8_t c=0;c < 48;c++)
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{//calibrate hop channels
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CC2500_Strobe(CC2500_SIDLE);
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CC2500_WriteReg(CC2500_0A_CHANNR,hopping_frequency[c]);
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CC2500_Strobe(CC2500_SCAL);
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delayMicroseconds(900);//
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calData[c] = CC2500_ReadReg(CC2500_25_FSCAL1);
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}
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//#######END INIT########
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}
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static void __attribute__((unused)) initialize_data(uint8_t adr)
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{
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CC2500_WriteReg(CC2500_0C_FSCTRL0,option); // Frequency offset hack
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CC2500_WriteReg(CC2500_18_MCSM0, 0x8);
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CC2500_WriteReg(CC2500_09_ADDR, adr ? 0x03 : rx_tx_addr[3]);
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CC2500_WriteReg(CC2500_07_PKTCTRL1,0x05);
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}
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//**CRC**
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const uint16_t PROGMEM CRC_Short[]={
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0x0000, 0x1189, 0x2312, 0x329B, 0x4624, 0x57AD, 0x6536, 0x74BF,
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0x8C48, 0x9DC1, 0xAF5A, 0xBED3, 0xCA6C, 0xDBE5, 0xE97E, 0xF8F7 };
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static uint16_t CRCTable(uint8_t val)
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{
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uint16_t word ;
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word = pgm_read_word(&CRC_Short[val&0x0F]) ;
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val /= 16 ;
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return word ^ (0x1081 * val) ;
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}
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static uint16_t __attribute__((unused)) crc_x(uint8_t *data, uint8_t len)
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{
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uint16_t crc = 0;
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for(uint8_t i=0; i < len; i++)
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crc = (crc<<8) ^ CRCTable((uint8_t)(crc>>8) ^ *data++);
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return crc;
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}
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// 0-2047, 0 = 817, 1024 = 1500, 2047 = 2182
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//64=860,1024=1500,1984=2140//Taranis 125%
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static uint16_t __attribute__((unused)) scaleForPXX( uint8_t i )
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{ //mapped 860,2140(125%) range to 64,1984(PXX values);
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return (uint16_t)(((Servo_data[i]-servo_min_125)*3)>>1)+64;
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}
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static void __attribute__((unused)) frskyX_build_bind_packet()
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{
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packet[0] = 0x1D;
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packet[1] = 0x03;
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packet[2] = 0x01;
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//
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packet[3] = rx_tx_addr[3];
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packet[4] = rx_tx_addr[2];
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int idx = ((state -FRSKY_BIND) % 10) * 5;
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packet[5] = idx;
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packet[6] = hopping_frequency[idx++];
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packet[7] = hopping_frequency[idx++];
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packet[8] = hopping_frequency[idx++];
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packet[9] = hopping_frequency[idx++];
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packet[10] = hopping_frequency[idx++];
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packet[11] = 0x02;
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packet[12] = RX_num;
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//
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memset(&packet[13], 0, 15);
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uint16_t lcrc = crc_x(&packet[3], 25);
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//
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packet[28] = lcrc >> 8;
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packet[29] = lcrc;
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//
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}
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static void __attribute__((unused)) frskyX_data_frame()
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{
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//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
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//
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static uint8_t lpass;
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uint16_t chan_0 ;
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uint16_t chan_1 ;
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uint8_t startChan = 0;
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//
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packet[0] = 0x1D;
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packet[1] = rx_tx_addr[3];
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packet[2] = rx_tx_addr[2];
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packet[3] = 0x02;
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//
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packet[4] = (ctr<<6)+hopping_frequency_no;
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packet[5] = counter_rst;
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packet[6] = RX_num;
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//packet[7] = FLAGS 00 - standard packet
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//10, 12, 14, 16, 18, 1A, 1C, 1E - failsafe packet
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//20 - range check packet
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packet[7] = 0;
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packet[8] = 0;
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//
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if ( lpass & 1 )
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startChan += 8 ;
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for(uint8_t i = 0; i <12 ; i+=3)
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{//12 bytes
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chan_0 = scaleForPXX(startChan);
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if(lpass & 1 )
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chan_0+=2048;
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startChan+=1;
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//
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chan_1 = scaleForPXX(startChan);
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if(lpass & 1 )
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chan_1+= 2048;
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startChan+=1;
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//
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packet[9+i] = lowByte(chan_0);//3 bytes*4
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packet[9+i+1]=(((chan_0>>8) & 0x0F)|(chan_1 << 4));
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packet[9+i+2]=chan_1>>4;
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}
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packet[21] = seq_last_sent << 4 | seq_last_rcvd;//8 at start
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if (seq_last_sent < 0x08 && seq_last_rcvd < 8)
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seq_last_sent = (seq_last_sent + 1) % 4;
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else if (seq_last_rcvd == 0x00)
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seq_last_sent = 1;
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if(sub_protocol== CH_8 )// in X8 mode send only 8ch every 9ms
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lpass = 0 ;
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else
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lpass += 1 ;
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for (uint8_t i=22;i<28;i++)
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packet[i]=0;
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uint16_t lcrc = crc_x(&packet[3], 25);
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packet[28]=lcrc>>8;//high byte
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packet[29]=lcrc;//low byte
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}
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uint16_t ReadFrSkyX()
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{
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switch(state)
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{
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default:
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set_start(47);
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CC2500_SetPower();
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CC2500_Strobe(CC2500_SFRX);
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//
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frskyX_build_bind_packet();
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CC2500_Strobe(CC2500_SIDLE);
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CC2500_WriteData(packet, packet[0]+1);
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state++;
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return 9000;
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case FRSKY_BIND_DONE:
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initialize_data(0);
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hopping_frequency_no=0;
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BIND_DONE;
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state++;
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break;
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case FRSKY_DATA1:
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if ( prev_option != option )
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{
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CC2500_WriteReg(CC2500_0C_FSCTRL0,option); // Frequency offset hack
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prev_option = option ;
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}
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CC2500_SetTxRxMode(TX_EN);
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set_start(hopping_frequency_no);
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CC2500_SetPower();
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CC2500_Strobe(CC2500_SFRX);
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hopping_frequency_no = (hopping_frequency_no+chanskip)%47;
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CC2500_Strobe(CC2500_SIDLE);
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CC2500_WriteData(packet, packet[0]+1);
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//
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frskyX_data_frame();
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state++;
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return 5500;
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case FRSKY_DATA2:
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CC2500_SetTxRxMode(RX_EN);
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CC2500_Strobe(CC2500_SIDLE);
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state++;
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return 200;
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case FRSKY_DATA3:
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CC2500_Strobe(CC2500_SRX);
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state++;
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return 3000;
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case FRSKY_DATA4:
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len = CC2500_ReadReg(CC2500_3B_RXBYTES | CC2500_READ_BURST) & 0x7F;
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if (len && (len<=(0x0E + 3))) //Telemetry frame is 17
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{
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counter=0;
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CC2500_ReadData(pkt, len);
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#if defined TELEMETRY
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frsky_check_telemetry(pkt,len); //check if valid telemetry packets
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//parse telemetry packets here
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//The same telemetry function used by FrSky(D8).
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#endif
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}
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else
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{
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counter++;
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// restart sequence on missed packet - might need count or timeout instead of one missed
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if(counter>100)
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{//~1sec
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seq_last_sent = 0;
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seq_last_rcvd = 8;
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counter=0;
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#if defined TELEMETRY
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telemetry_lost=1;
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#endif
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}
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CC2500_Strobe(CC2500_SFRX); //flush the RXFIFO
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}
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state = FRSKY_DATA1;
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return 300;
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}
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return 1;
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}
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uint16_t initFrSkyX()
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{
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set_rx_tx_addr(MProtocol_id_master);
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Frsky_init_hop();
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while(!chanskip)
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chanskip=random(0xfefefefe)%47;
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while((chanskip-ctr)%4)
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ctr=(ctr+1)%4;
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counter_rst=(chanskip-ctr)>>2;
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//for test***************
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//rx_tx_addr[3]=0xB3;
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//rx_tx_addr[2]=0xFD;
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//************************
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hopping_frequency[47]=0;
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frskyX_init();
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CC2500_SetTxRxMode(TX_EN);
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//
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if(IS_AUTOBIND_FLAG_on)
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{
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state = FRSKY_BIND;
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initialize_data(1);
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}
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else
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{
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state = FRSKY_DATA1;
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initialize_data(0);
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}
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seq_last_sent = 0;
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seq_last_rcvd = 8;
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return 10000;
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}
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#endif |