shubham c / Mbed 2 deprecated Beacon_final_receiver

iyhda

Dependencies:   mbed

main.cpp@0:c793eb8100c9, 2014-07-15 (annotated)

Committer:
ee12b079
Date:
Tue Jul 15 09:29:35 2014 +0000
Revision:
0:c793eb8100c9
Child:
1:2b6cdf97b912
Short_beacon_receiver

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ee12b079 0:c793eb8100c9 1 //changed the receiver bandwidth to 83.3 khz
ee12b079 0:c793eb8100c9 2 //experiment on bandwidth stuff
ee12b079 0:c793eb8100c9 3 //shaping in transmitter
ee12b079 0:c793eb8100c9 4 //rssi thresh, etc.
ee12b079 0:c793eb8100c9 5 //sync word ....callsign
ee12b079 0:c793eb8100c9 6 //don't wait for sync_match!!!!!!!!!!!!!!!
ee12b079 0:c793eb8100c9 7
ee12b079 0:c793eb8100c9 8 /*
ee12b079 0:c793eb8100c9 9 regIrq2(0x28) :
ee12b079 0:c793eb8100c9 10
ee12b079 0:c793eb8100c9 11 regpacketconfig 1(0x37) :
ee12b079 0:c793eb8100c9 12 set crc detection/calc. on : | 0x10
ee12b079 0:c793eb8100c9 13 crcautoclearoff : | 0x08
ee12b079 0:c793eb8100c9 14
ee12b079 0:c793eb8100c9 15 for data whitening : regpacketconfig 1(0x37) :| 0x40
ee12b079 0:c793eb8100c9 16 */
ee12b079 0:c793eb8100c9 17
ee12b079 0:c793eb8100c9 18 #include "mbed.h"
ee12b079 0:c793eb8100c9 19 #define TIMES 20
ee12b079 0:c793eb8100c9 20 Serial pc(USBTX, USBRX); // tx, rx
ee12b079 0:c793eb8100c9 21 SPI spi(p11, p12, p13); // mosi, miso, sclk
ee12b079 0:c793eb8100c9 22 DigitalOut cs(p8); //slave select or chip select
ee12b079 0:c793eb8100c9 23
ee12b079 0:c793eb8100c9 24 void writereg(uint8_t reg,uint8_t val)
ee12b079 0:c793eb8100c9 25 {
ee12b079 0:c793eb8100c9 26 cs = 0;
ee12b079 0:c793eb8100c9 27 __disable_irq();
ee12b079 0:c793eb8100c9 28 spi.write(reg | 0x80);
ee12b079 0:c793eb8100c9 29 spi.write(val);
ee12b079 0:c793eb8100c9 30 __enable_irq();
ee12b079 0:c793eb8100c9 31 cs = 1;
ee12b079 0:c793eb8100c9 32 }
ee12b079 0:c793eb8100c9 33 uint8_t readreg(uint8_t reg)
ee12b079 0:c793eb8100c9 34 {
ee12b079 0:c793eb8100c9 35 int val;
ee12b079 0:c793eb8100c9 36 cs = 0;
ee12b079 0:c793eb8100c9 37 __disable_irq();
ee12b079 0:c793eb8100c9 38 spi.write(reg & ~0x80);
ee12b079 0:c793eb8100c9 39 val = spi.write(0);
ee12b079 0:c793eb8100c9 40 __enable_irq();
ee12b079 0:c793eb8100c9 41 cs = 1;
ee12b079 0:c793eb8100c9 42 return val;
ee12b079 0:c793eb8100c9 43 }
ee12b079 0:c793eb8100c9 44
ee12b079 0:c793eb8100c9 45 int main(){
ee12b079 0:c793eb8100c9 46 wait(0.1); //wait for POR to complete
ee12b079 0:c793eb8100c9 47 cs = 1; // Chip must be deselected
ee12b079 0:c793eb8100c9 48 int bar = TIMES;
ee12b079 0:c793eb8100c9 49 spi.format(8,0);
ee12b079 0:c793eb8100c9 50 spi.frequency(10000000); //10MHz SCLK frequency(its max for rfm69hcw)
ee12b079 0:c793eb8100c9 51 int u = 0;
ee12b079 0:c793eb8100c9 52 int hk_data_len = 240;
ee12b079 0:c793eb8100c9 53 uint8_t hk[240];
ee12b079 0:c793eb8100c9 54 //initialization
ee12b079 0:c793eb8100c9 55
ee12b079 0:c793eb8100c9 56 //Common configuration registers
ee12b079 0:c793eb8100c9 57 writereg(0x01,0x04); //sequencer off,standby mode
ee12b079 0:c793eb8100c9 58 writereg(0x02,0x08);// | 0x01); //packet, ook, no dc
ee12b079 0:c793eb8100c9 59 writereg(0x03,0x68); //1200bps
ee12b079 0:c793eb8100c9 60 writereg(0x04,0x2B); //1200bps
ee12b079 0:c793eb8100c9 61 writereg(0x07,0x6C);
ee12b079 0:c793eb8100c9 62 writereg(0x08,0xC0);
ee12b079 0:c793eb8100c9 63 writereg(0x09,0x00); //try 6C D0 0B for 435 MHZ //try 6C 40 00 for 432.something //try E4 C0 00 for 915 //6C D6 73 for 435.1Mhz
ee12b079 0:c793eb8100c9 64 // 6D1015 for 436 MHZ
ee12b079 0:c793eb8100c9 65 //rx registers
ee12b079 0:c793eb8100c9 66 writereg(0x18,0x08); //RegLNA using agc
ee12b079 0:c793eb8100c9 67 writereg(0x19,0x42); //Regrxbw (data is successfully received from 5.2 khz onwards for 1200bps)
ee12b079 0:c793eb8100c9 68 //keep it as 0x51 for 83.3kHz, 0x42 for 62.5kHz, 0x49 for 100 kHz, 0x40 for 250khz, 57 for 1.3khz, 56 for 2.6khz
ee12b079 0:c793eb8100c9 69 //46 for 3.9khz
ee12b079 0:c793eb8100c9 70
ee12b079 0:c793eb8100c9 71
ee12b079 0:c793eb8100c9 72 //IRQ and pin mapping
ee12b079 0:c793eb8100c9 73 //irq1: modeready, rssi, syncaddressmatch used.
ee12b079 0:c793eb8100c9 74 //irq2: fifonnotempty, payloadready used.
ee12b079 0:c793eb8100c9 75 //rssi thresh is default = -117 dbm
ee12b079 0:c793eb8100c9 76 writereg(0x29,180); //rssi_thresh = -110 (0x6E) //0xB4 for -180 //0x96 for -150dBm
ee12b079 0:c793eb8100c9 77 //0x78 for -120
ee12b079 0:c793eb8100c9 78
ee12b079 0:c793eb8100c9 79 //Packet Engine Registers
ee12b079 0:c793eb8100c9 80 writereg(0x2C,0x00);
ee12b079 0:c793eb8100c9 81 writereg(0x2D,0x0A);//preamblesize = 10 bytes
ee12b079 0:c793eb8100c9 82 writereg(0x2E,0x80);//sync on , FIFO filling condition : if SyncAddress interrupt occurs
ee12b079 0:c793eb8100c9 83 writereg(0x2F,0x5E);//sync word 1
ee12b079 0:c793eb8100c9 84 writereg(0x37,0x08 | 0x40) ;//| 0x10);//Fixed length, on dc-free, no crc,issue packetready even if crc fails, no address filter
ee12b079 0:c793eb8100c9 85 writereg(0x38,0x00);//payload_length= 0 due to unlimited packet mode
ee12b079 0:c793eb8100c9 86 writereg(0x3C,0x27);//fifothresh is 39 because we want it to be set when it reaches 40
ee12b079 0:c793eb8100c9 87
ee12b079 0:c793eb8100c9 88 pc.printf("press 'r' to start receiver\n");
ee12b079 0:c793eb8100c9 89 while(pc.getc()== 'r'){
ee12b079 0:c793eb8100c9 90 //force rx in WAIT mode
ee12b079 0:c793eb8100c9 91 writereg(0x3D,0x04);//avoid rx deadlocks
ee12b079 0:c793eb8100c9 92 //set to Rx mode
ee12b079 0:c793eb8100c9 93 writereg(0x01,0x10);
ee12b079 0:c793eb8100c9 94
ee12b079 0:c793eb8100c9 95 //wait for modeready
ee12b079 0:c793eb8100c9 96 while((readreg(0x27)&0x80)!=0x80);
ee12b079 0:c793eb8100c9 97 pc.printf("receiver is on, ready to accept.....\n");
ee12b079 0:c793eb8100c9 98
ee12b079 0:c793eb8100c9 99 //wait for rssi to cross rssi_thresh
ee12b079 0:c793eb8100c9 100 while((readreg(0x27)& 0x08) != 0x08);//{pc.printf("w:rssi\n");}
ee12b079 0:c793eb8100c9 101
ee12b079 0:c793eb8100c9 102 //wait for SyncAddressMatch
ee12b079 0:c793eb8100c9 103 while((readreg(0x27) & 0x01) != 0x01);//{pc.printf("w:sync\n");}
ee12b079 0:c793eb8100c9 104
ee12b079 0:c793eb8100c9 105 //pc.printf("receiving.....\n");
ee12b079 0:c793eb8100c9 106 //check for fifo_thresh
ee12b079 0:c793eb8100c9 107 while((readreg(0x28) & 0x20) != 0x20);//{pc.printf("w:fifo_thresh\n");}
ee12b079 0:c793eb8100c9 108
ee12b079 0:c793eb8100c9 109 while(bar == TIMES)//fifo_thresh
ee12b079 0:c793eb8100c9 110 {
ee12b079 0:c793eb8100c9 111 if((hk_data_len - u - 40) >= TIMES)
ee12b079 0:c793eb8100c9 112 bar = TIMES;
ee12b079 0:c793eb8100c9 113 else
ee12b079 0:c793eb8100c9 114 bar = (hk_data_len - u - 40)%TIMES;
ee12b079 0:c793eb8100c9 115 //reading
ee12b079 0:c793eb8100c9 116 cs = 0;
ee12b079 0:c793eb8100c9 117 spi.write(0x00);
ee12b079 0:c793eb8100c9 118 for(int i=0; i<TIMES;i++,u++)
ee12b079 0:c793eb8100c9 119 hk[u] = spi.write(0);
ee12b079 0:c793eb8100c9 120 cs = 1;
ee12b079 0:c793eb8100c9 121 //check for fifo_thresh
ee12b079 0:c793eb8100c9 122 while((readreg(0x28) & 0x20) != 0x20);
ee12b079 0:c793eb8100c9 123 }
ee12b079 0:c793eb8100c9 124 //Check if received
ee12b079 0:c793eb8100c9 125 //while((readreg(0x28) & 0x04) != 0x04);.......donno why not getting fired!!!!!!!
ee12b079 0:c793eb8100c9 126
ee12b079 0:c793eb8100c9 127 //check for fifo_thresh!!!!!
ee12b079 0:c793eb8100c9 128 while((readreg(0x28) & 0x20) != 0x20);
ee12b079 0:c793eb8100c9 129
ee12b079 0:c793eb8100c9 130 pc.printf("\n\npacket received!!! \n\n");
ee12b079 0:c793eb8100c9 131
ee12b079 0:c793eb8100c9 132 wait(1);
ee12b079 0:c793eb8100c9 133 //Switch back to Standby Mode
ee12b079 0:c793eb8100c9 134 writereg(0x01,0x04);
ee12b079 0:c793eb8100c9 135 //wait for modeready
ee12b079 0:c793eb8100c9 136 while((readreg(0x27)&0x80)!=0x80);
ee12b079 0:c793eb8100c9 137
ee12b079 0:c793eb8100c9 138 //reading remaining 40 bytes
ee12b079 0:c793eb8100c9 139 cs = 0;
ee12b079 0:c793eb8100c9 140 spi.write(0x00);
ee12b079 0:c793eb8100c9 141 for (; u < hk_data_len ; u++)
ee12b079 0:c793eb8100c9 142 hk[u] = spi.write(0);
ee12b079 0:c793eb8100c9 143 cs = 1;
ee12b079 0:c793eb8100c9 144 pc.printf("shortbeacon[] : \n");
ee12b079 0:c793eb8100c9 145
ee12b079 0:c793eb8100c9 146 // converting uint_8 to bool
ee12b079 0:c793eb8100c9 147 bool shortbeacon[120];
ee12b079 0:c793eb8100c9 148 for(int i = 0; i<120; i++)
ee12b079 0:c793eb8100c9 149 hk[2*i] == 0xFF ? shortbeacon[i] = 1 :shortbeacon[i] = 0;
ee12b079 0:c793eb8100c9 150 /*for(int i = 0; i<120 ; i++)
ee12b079 0:c793eb8100c9 151 pc.printf(" %d \n",shortbeacon[i]);*/
ee12b079 0:c793eb8100c9 152
ee12b079 0:c793eb8100c9 153 //converting bool to uint_8
ee12b079 0:c793eb8100c9 154 uint8_t s_beacon[15];
ee12b079 0:c793eb8100c9 155 for(int i = 0, m =0 ; i < 15 ; i++ )
ee12b079 0:c793eb8100c9 156 for(int n = 0; n < 8; n++,m++)
ee12b079 0:c793eb8100c9 157 {
ee12b079 0:c793eb8100c9 158 if(shortbeacon[m])
ee12b079 0:c793eb8100c9 159 {
ee12b079 0:c793eb8100c9 160 s_beacon[i]<<=1;
ee12b079 0:c793eb8100c9 161 s_beacon[i] |= 0x01;
ee12b079 0:c793eb8100c9 162 }
ee12b079 0:c793eb8100c9 163 else
ee12b079 0:c793eb8100c9 164 s_beacon[i] <<= 1;
ee12b079 0:c793eb8100c9 165 }
ee12b079 0:c793eb8100c9 166
ee12b079 0:c793eb8100c9 167
ee12b079 0:c793eb8100c9 168 pc.printf("Call Sign : ");
ee12b079 0:c793eb8100c9 169 for(int i = 0; i<7 ; i++)
ee12b079 0:c793eb8100c9 170 pc.printf(" %X ",s_beacon[i]);
ee12b079 0:c793eb8100c9 171
ee12b079 0:c793eb8100c9 172 pc.printf("\n\nVoltage[0] : ");
ee12b079 0:c793eb8100c9 173 pc.printf(" 0x%X \n\n",s_beacon[7]);
ee12b079 0:c793eb8100c9 174
ee12b079 0:c793eb8100c9 175 pc.printf("AngularSpeed[0] : ");
ee12b079 0:c793eb8100c9 176 pc.printf(" 0x%X \n\n",s_beacon[8]);
ee12b079 0:c793eb8100c9 177
ee12b079 0:c793eb8100c9 178 pc.printf("AngularSpeed[1] : ");
ee12b079 0:c793eb8100c9 179 pc.printf(" 0x%X \n\n",s_beacon[9]);
ee12b079 0:c793eb8100c9 180
ee12b079 0:c793eb8100c9 181 pc.printf("SubsystemStatus[0] : ");
ee12b079 0:c793eb8100c9 182 pc.printf(" 0x%X \n\n",s_beacon[10]);
ee12b079 0:c793eb8100c9 183
ee12b079 0:c793eb8100c9 184 pc.printf("Temp[0] : ");
ee12b079 0:c793eb8100c9 185 pc.printf(" 0x%X \n\n",s_beacon[11]);
ee12b079 0:c793eb8100c9 186
ee12b079 0:c793eb8100c9 187 pc.printf("Temp[1] : ");
ee12b079 0:c793eb8100c9 188 pc.printf(" 0x%X \n\n",s_beacon[12]);
ee12b079 0:c793eb8100c9 189
ee12b079 0:c793eb8100c9 190 pc.printf("Temp[2] : ");
ee12b079 0:c793eb8100c9 191 pc.printf(" 0x%X \n\n",s_beacon[13]);
ee12b079 0:c793eb8100c9 192
ee12b079 0:c793eb8100c9 193 pc.printf("ErrorFlag[0] : ");
ee12b079 0:c793eb8100c9 194 pc.printf(" 0x%X \n\n",s_beacon[14]);
ee12b079 0:c793eb8100c9 195
ee12b079 0:c793eb8100c9 196 }
ee12b079 0:c793eb8100c9 197 }