pradeep shekhar / Mbed 2 deprecated BEACON_CODE

Repository for final Beacon code of IITMSAT

Dependencies:   mbed

BCN.cpp@25:90cdfbadea91, 2015-11-07 (annotated)

Committer:
shekhar
Date:
Sat Nov 07 10:23:10 2015 +0000
Revision:
25:90cdfbadea91
Parent:
24:ca96cddf25d0 
Removed the infi 'init' issue

Who changed what in which revision?

UserRevisionLine numberNew contents of line
shekhar 18:3d8e70286f67 1 #include "BCN.h"
shekhar 24:ca96cddf25d0 2 #include <stdio.h>
shekhar 24:ca96cddf25d0 3 #include "pin_config.h"
shekhar 17:afadd6b988a2 4 //Check the pin names
shekhar 17:afadd6b988a2 5 //Takes max 4.3 sec in void FCTN_BCN_TX_MAIN() (temp.calc. + long_beacon + short_beacon)
shekhar 17:afadd6b988a2 6
shekhar 24:ca96cddf25d0 7 Serial pc_bcn(USBTX, USBRX); //tx,rx
shekhar 25:90cdfbadea91 8 //SPI spi(D11, D12, D13); // mosi, miso, sclk
shekhar 25:90cdfbadea91 9 //DigitalOut cs(D10); //slave select or chip select
shekhar 24:ca96cddf25d0 10 SPI spi(PIN16, PIN17, PIN15); // mosi, miso, sclk
shekhar 24:ca96cddf25d0 11 DigitalOut cs(PIN6); //slave select or chip select
shekhar 24:ca96cddf25d0 12 Timer t_i;//timer for checking the time taken by (temp.calc. + long_beacon + short_beacon)
shekhar 24:ca96cddf25d0 13 Timeout rf_sl_timeout;//RF_silence timer
shekhar 24:ca96cddf25d0 14 Ticker loop;//for transmitting every 10 secs
shekhar 17:afadd6b988a2 15
shekhar 17:afadd6b988a2 16 //GLOBAL VARIABLES
shekhar 17:afadd6b988a2 17 uint8_t BCN_INIT_STATUS = 0;
shekhar 17:afadd6b988a2 18 uint8_t BCN_TX_MAIN_STATUS = 0;
shekhar 17:afadd6b988a2 19 uint8_t BCN_TX_STATUS = 0;
shekhar 17:afadd6b988a2 20 uint8_t BCN_TX_EN = 1; //hardcoding for now //check where is this variable toggled??
shekhar 19:6863457ea3d1 21 uint8_t BCN_FEN = 0; //hardcoding for now //write this value to flash
shekhar 17:afadd6b988a2 22 uint8_t BCN_STANDBY = 0; //hardcoding for now //check where is this variable toggled??
shekhar 25:90cdfbadea91 23 uint8_t BCN_TS_BUFFER = 0; // For Temperature
shekhar 25:90cdfbadea91 24 uint8_t ERROR_CHECK = 0;
shekhar 25:90cdfbadea91 25 uint8_t BCN_FAIL_COUNT = 0; //Flag for keeping count of no. of times of BCN failure in init or one transmission in 30 secs (failure in spi communication)
shekhar 25:90cdfbadea91 26 //This Flag when exceeds a threshold, uC should reset.
shekhar 17:afadd6b988a2 27 void FCTN_BCN_INIT()
shekhar 17:afadd6b988a2 28 {
shekhar 24:ca96cddf25d0 29 pc_bcn.printf("FCTN_BCN_INIT\n");
shekhar 24:ca96cddf25d0 30 Init_BEACON_HW();
shekhar 17:afadd6b988a2 31 BCN_INIT_STATUS = 1;
shekhar 24:ca96cddf25d0 32 if(BCN_FEN == 0)//BCN_FEN is in flash
shekhar 24:ca96cddf25d0 33 rf_sl_timeout.attach(&FCTN_BCN_FEN, RF_SILENCE_TIME);
shekhar 17:afadd6b988a2 34 BCN_INIT_STATUS = 0;
shekhar 17:afadd6b988a2 35 }
shekhar 17:afadd6b988a2 36 void FCTN_BCN_FEN()
shekhar 17:afadd6b988a2 37 {
shekhar 24:ca96cddf25d0 38 pc_bcn.printf("FCTN_FEN\n");
shekhar 17:afadd6b988a2 39 BCN_FEN = 1;//write this value to flash
shekhar 17:afadd6b988a2 40 }
shekhar 17:afadd6b988a2 41 void FCTN_BCN_TX_MAIN()
shekhar 17:afadd6b988a2 42 {
shekhar 25:90cdfbadea91 43 ERROR_CHECK=0;
shekhar 24:ca96cddf25d0 44 pc_bcn.printf("FCTN_BCN_TX_MAIN\n");
shekhar 17:afadd6b988a2 45 t_i.start();
shekhar 17:afadd6b988a2 46 int begin = t_i.read_us();
shekhar 17:afadd6b988a2 47 BCN_TX_MAIN_STATUS = 1;
shekhar 17:afadd6b988a2 48
shekhar 17:afadd6b988a2 49 if(BCN_FEN == 1)
shekhar 17:afadd6b988a2 50 {
shekhar 17:afadd6b988a2 51 if(BCN_TX_EN == 1)
shekhar 17:afadd6b988a2 52 {
shekhar 17:afadd6b988a2 53 //Measure and store BCN temperature in BCN_TS_BUFFER
shekhar 17:afadd6b988a2 54 BCN_TS_BUFFER = check_Temperature();
shekhar 24:ca96cddf25d0 55 pc_bcn.printf("\n\ntemperature = %d\n\n",BCN_TS_BUFFER);
shekhar 17:afadd6b988a2 56 //Get BCN_HK data from BCN HW(SPI) //Store BCN_HK data in BCN_HK_BUFFER
shekhar 17:afadd6b988a2 57 if(BCN_STANDBY == 1 )
shekhar 17:afadd6b988a2 58 {
shekhar 17:afadd6b988a2 59 Set_BCN_TX_STATUS(BCN_TX_STANDBY);
shekhar 17:afadd6b988a2 60 BCN_TX_MAIN_STATUS = 0;
shekhar 17:afadd6b988a2 61
shekhar 17:afadd6b988a2 62 // break;
shekhar 17:afadd6b988a2 63 }
shekhar 17:afadd6b988a2 64 else
shekhar 17:afadd6b988a2 65 {
shekhar 17:afadd6b988a2 66 //transmit short beacon and long beacon
shekhar 17:afadd6b988a2 67 SHORT_BCN_TX();
shekhar 23:a864d57f10c4 68 LONG_BCN_TX();
shekhar 17:afadd6b988a2 69
shekhar 17:afadd6b988a2 70 if(Check_ACK_RECEIVED() == 1)
shekhar 17:afadd6b988a2 71 {
shekhar 17:afadd6b988a2 72 Set_BCN_TX_STATUS(BCN_TX_SUCCESS);
shekhar 17:afadd6b988a2 73 BCN_TX_MAIN_STATUS = 0;
shekhar 17:afadd6b988a2 74 }
shekhar 17:afadd6b988a2 75 else
shekhar 17:afadd6b988a2 76 {
shekhar 17:afadd6b988a2 77 Set_BCN_TX_STATUS(BCN_TX_FAILURE);
shekhar 17:afadd6b988a2 78 BCN_TX_MAIN_STATUS = 0;
shekhar 17:afadd6b988a2 79
shekhar 17:afadd6b988a2 80 }
shekhar 17:afadd6b988a2 81 }
shekhar 17:afadd6b988a2 82 }
shekhar 17:afadd6b988a2 83 else
shekhar 17:afadd6b988a2 84 {
shekhar 17:afadd6b988a2 85 Set_BCN_TX_STATUS(BCN_TX_DISABLED);
shekhar 17:afadd6b988a2 86 BCN_TX_MAIN_STATUS = 0;
shekhar 17:afadd6b988a2 87 }
shekhar 17:afadd6b988a2 88 }
shekhar 17:afadd6b988a2 89 else
shekhar 17:afadd6b988a2 90 {
shekhar 17:afadd6b988a2 91 Set_BCN_TX_STATUS(BCN_RF_SILENCE); //Window of RF Silence: None of the Txs should be on.
shekhar 17:afadd6b988a2 92 BCN_TX_MAIN_STATUS = 0;
shekhar 17:afadd6b988a2 93 }
shekhar 17:afadd6b988a2 94 t_i.stop();
shekhar 17:afadd6b988a2 95 int end = t_i.read_us();
shekhar 24:ca96cddf25d0 96 pc_bcn.printf("The time required for FCTN_BCN_TX_MAIN is %d useconds\r\n", end-begin);
shekhar 25:90cdfbadea91 97 ERROR_CHECK = 0;
shekhar 17:afadd6b988a2 98
shekhar 17:afadd6b988a2 99 }
shekhar 17:afadd6b988a2 100
shekhar 17:afadd6b988a2 101 void Set_BCN_TX_STATUS(uint8_t STATUS)
shekhar 17:afadd6b988a2 102 {
shekhar 17:afadd6b988a2 103 BCN_TX_STATUS = STATUS;
shekhar 17:afadd6b988a2 104 }
shekhar 17:afadd6b988a2 105
shekhar 17:afadd6b988a2 106 uint8_t check_Temperature()
shekhar 17:afadd6b988a2 107 {
shekhar 17:afadd6b988a2 108 uint8_t temperature;
shekhar 24:ca96cddf25d0 109 writereg(RF22_REG_0F_ADC_CONFIGURATION,0x00);//set ADC to temp measurement
shekhar 24:ca96cddf25d0 110 writereg(RF22_REG_12_Temperature_Sensor_Calibration,0x20);//measure in degree celsius
shekhar 24:ca96cddf25d0 111 writereg(RF22_REG_0F_ADC_CONFIGURATION,0x80);//start adc
shekhar 17:afadd6b988a2 112 wait(0.1);
shekhar 17:afadd6b988a2 113 temperature = readreg(RF22_REG_11_ADC_Value);
shekhar 17:afadd6b988a2 114 temperature = (float)temperature*0.5 - 64;
shekhar 17:afadd6b988a2 115 return temperature;
shekhar 17:afadd6b988a2 116 }
shekhar 17:afadd6b988a2 117
shekhar 17:afadd6b988a2 118 void SHORT_BCN_TX()
shekhar 17:afadd6b988a2 119 {
shekhar 17:afadd6b988a2 120 writereg(RF22_REG_6E_TX_DATA_RATE,0x01);
shekhar 20:89b6bb0859a1 121 writereg(RF22_REG_6F_TX_DATA_RATE,0x50);//160bps
shekhar 17:afadd6b988a2 122 writereg(RF22_REG_3E_PACKET_LENGTH,SHORT_TX_DATA); //short packet length
shekhar 17:afadd6b988a2 123 wait(0.02);
shekhar 17:afadd6b988a2 124
shekhar 17:afadd6b988a2 125 uint32_t timeout_count = 10e5;
shekhar 17:afadd6b988a2 126 //extract values from short_beacon[]
shekhar 17:afadd6b988a2 127
shekhar 17:afadd6b988a2 128 struct Short_beacon
shekhar 17:afadd6b988a2 129 {
shekhar 17:afadd6b988a2 130 uint8_t Voltage[1];
shekhar 17:afadd6b988a2 131 uint8_t AngularSpeed[2];
shekhar 17:afadd6b988a2 132 uint8_t SubsystemStatus[1];
shekhar 17:afadd6b988a2 133 uint8_t Temp[3];
shekhar 17:afadd6b988a2 134 uint8_t ErrorFlag[1];
shekhar 17:afadd6b988a2 135 }Shortbeacon = { {0x88}, {0x99, 0xAA} , {0xAA},{0xAA,0xDD,0xEE}, {0x00} };
shekhar 17:afadd6b988a2 136
shekhar 17:afadd6b988a2 137 //filling hk data
shekhar 17:afadd6b988a2 138 //uint8_t short_beacon[] = { 0xAB, 0x8A, 0xE2, 0xBB, 0xB8, 0xA2, 0x8E,Shortbeacon.Voltage[0],Shortbeacon.AngularSpeed[0], Shortbeacon.AngularSpeed[1],Shortbeacon.SubsystemStatus[0],Shortbeacon.Temp[0],Shortbeacon.Temp[1],Shortbeacon.Temp[2],Shortbeacon.ErrorFlag[0]};
shekhar 17:afadd6b988a2 139 uint8_t short_beacon[] = { 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,Shortbeacon.Voltage[0],Shortbeacon.AngularSpeed[0], Shortbeacon.AngularSpeed[1],Shortbeacon.SubsystemStatus[0],Shortbeacon.Temp[0],Shortbeacon.Temp[1],Shortbeacon.Temp[2],Shortbeacon.ErrorFlag[0]};
shekhar 17:afadd6b988a2 140
shekhar 17:afadd6b988a2 141 //writereg(RF22_REG_07_OPERATING_MODE1,0x01); //ready mode ??
shekhar 17:afadd6b988a2 142 clearTxBuf();
shekhar 17:afadd6b988a2 143 //writing data first time
shekhar 17:afadd6b988a2 144 int byte = 0;
shekhar 17:afadd6b988a2 145 cs = 0;
shekhar 17:afadd6b988a2 146 spi.write(0xFF);
shekhar 17:afadd6b988a2 147
shekhar 17:afadd6b988a2 148 for (int byte_counter = 0; byte_counter <15 ; byte_counter++)
shekhar 17:afadd6b988a2 149 {
shekhar 17:afadd6b988a2 150 for(int j = 3; j >= 0 ; j--)
shekhar 17:afadd6b988a2 151 {
shekhar 17:afadd6b988a2 152 if((short_beacon[byte_counter] & (uint8_t) pow(2.0,(j*2+1)))!= pow(2.0,(j*2+1)))
shekhar 17:afadd6b988a2 153 {
shekhar 17:afadd6b988a2 154 byte=0x00;
shekhar 17:afadd6b988a2 155 }
shekhar 17:afadd6b988a2 156 else
shekhar 17:afadd6b988a2 157 {
shekhar 17:afadd6b988a2 158 byte=0xF0;
shekhar 17:afadd6b988a2 159 }
shekhar 17:afadd6b988a2 160 if((short_beacon[byte_counter] & (uint8_t) pow(2.0,j*2))!= pow(2.0,j*2))
shekhar 17:afadd6b988a2 161 {
shekhar 17:afadd6b988a2 162 byte=byte | 0x00;
shekhar 17:afadd6b988a2 163 }
shekhar 17:afadd6b988a2 164 else
shekhar 17:afadd6b988a2 165 {
shekhar 17:afadd6b988a2 166 byte=byte | 0x0F;
shekhar 17:afadd6b988a2 167 }
shekhar 17:afadd6b988a2 168 spi.write(byte);
shekhar 17:afadd6b988a2 169 }
shekhar 17:afadd6b988a2 170 }
shekhar 17:afadd6b988a2 171
shekhar 17:afadd6b988a2 172 cs = 1;
shekhar 17:afadd6b988a2 173
shekhar 17:afadd6b988a2 174 //Set to Tx mode
shekhar 24:ca96cddf25d0 175 writereg(RF22_REG_07_OPERATING_MODE1,0x08); //txon
shekhar 24:ca96cddf25d0 176 wait(0.1);// takes time to set to tx mode hence the delay of 0.1.
shekhar 24:ca96cddf25d0 177
shekhar 17:afadd6b988a2 178 //Check for fifoThresh
shekhar 25:90cdfbadea91 179 while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x20) == 0x20)break;else if(timeout_count == 1) reset_rfm(1);
shekhar 17:afadd6b988a2 180 timeout_count=10e5;
shekhar 17:afadd6b988a2 181
shekhar 17:afadd6b988a2 182 //Check for packet_sent
shekhar 25:90cdfbadea91 183 while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x04) == 0x04)break;else if(timeout_count == 1) reset_rfm(1);
shekhar 17:afadd6b988a2 184
shekhar 24:ca96cddf25d0 185 //pc_bcn.printf("Short packet sent\r\n");
shekhar 17:afadd6b988a2 186
shekhar 17:afadd6b988a2 187 writereg(RF22_REG_07_OPERATING_MODE1,0x00); //standby mode
shekhar 17:afadd6b988a2 188
shekhar 17:afadd6b988a2 189 }
shekhar 17:afadd6b988a2 190 void LONG_BCN_TX()
shekhar 17:afadd6b988a2 191 {
shekhar 17:afadd6b988a2 192 writereg(RF22_REG_6E_TX_DATA_RATE,0x04);
shekhar 17:afadd6b988a2 193 writereg(RF22_REG_6F_TX_DATA_RATE,0xEA);//600 bps
shekhar 17:afadd6b988a2 194 writereg(RF22_REG_3E_PACKET_LENGTH,LONG_TX_DATA); //long packet length
shekhar 17:afadd6b988a2 195 wait(0.02);
shekhar 17:afadd6b988a2 196 uint32_t timeout_count=10e5;
shekhar 17:afadd6b988a2 197
shekhar 17:afadd6b988a2 198 //get long_beacon array
shekhar 17:afadd6b988a2 199
shekhar 17:afadd6b988a2 200 uint8_t Long_beacon[75];
shekhar 17:afadd6b988a2 201 for(int i = 0;i<75;i++)
shekhar 17:afadd6b988a2 202 {
shekhar 17:afadd6b988a2 203 Long_beacon[i] = 0xA0;
shekhar 17:afadd6b988a2 204 }
shekhar 17:afadd6b988a2 205
shekhar 17:afadd6b988a2 206 clearTxBuf();
shekhar 17:afadd6b988a2 207 //writing data first time
shekhar 17:afadd6b988a2 208 cs = 0;
shekhar 17:afadd6b988a2 209 spi.write(0xFF);
shekhar 17:afadd6b988a2 210 for(int i=0; i<60;i++)
shekhar 17:afadd6b988a2 211 {
shekhar 17:afadd6b988a2 212 spi.write(Long_beacon[i]);
shekhar 17:afadd6b988a2 213 }
shekhar 17:afadd6b988a2 214 cs = 1;
shekhar 17:afadd6b988a2 215
shekhar 17:afadd6b988a2 216 //Set to Tx mode
shekhar 23:a864d57f10c4 217 writereg(RF22_REG_07_OPERATING_MODE1,0x08);
shekhar 24:ca96cddf25d0 218 wait(0.1);//necessary
shekhar 17:afadd6b988a2 219
shekhar 17:afadd6b988a2 220 //Check for fifoThresh
shekhar 25:90cdfbadea91 221 while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x20) == 0x20)break;else if(timeout_count == 1) reset_rfm(1);
shekhar 17:afadd6b988a2 222 timeout_count=10e5;
shekhar 17:afadd6b988a2 223
shekhar 17:afadd6b988a2 224 cs = 0;
shekhar 17:afadd6b988a2 225 spi.write(0xFF);
shekhar 17:afadd6b988a2 226 for(int i=60; i<75;i++)
shekhar 17:afadd6b988a2 227 {
shekhar 17:afadd6b988a2 228 spi.write(Long_beacon[i]);
shekhar 17:afadd6b988a2 229 }
shekhar 17:afadd6b988a2 230 cs = 1;
shekhar 17:afadd6b988a2 231 wait(0.1);
shekhar 17:afadd6b988a2 232 //Check for fifoThresh
shekhar 25:90cdfbadea91 233 while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x20) == 0x20)break;else if(timeout_count == 1) reset_rfm(1);
shekhar 17:afadd6b988a2 234 timeout_count=10e5;
shekhar 17:afadd6b988a2 235
shekhar 17:afadd6b988a2 236 //Check for packetsent interrupt
shekhar 25:90cdfbadea91 237 while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x04) == 0x04)break;else if(timeout_count == 1) reset_rfm(1);
shekhar 17:afadd6b988a2 238
shekhar 24:ca96cddf25d0 239 //pc_bcn.printf("Long packet sent\r\n");
shekhar 17:afadd6b988a2 240
shekhar 17:afadd6b988a2 241 writereg(RF22_REG_07_OPERATING_MODE1,0x00); //standby mode
shekhar 17:afadd6b988a2 242 }
shekhar 25:90cdfbadea91 243 void reset_rfm(uint8_t fl)
shekhar 17:afadd6b988a2 244 {
shekhar 25:90cdfbadea91 245 if (fl ==1 && ERROR_CHECK ==0)
shekhar 25:90cdfbadea91 246 {BCN_FAIL_COUNT++;
shekhar 25:90cdfbadea91 247 ERROR_CHECK=1;
shekhar 25:90cdfbadea91 248 printf("BCN_FAIL_COUNT++\n");}
shekhar 25:90cdfbadea91 249 else if(fl == 0)
shekhar 25:90cdfbadea91 250 {BCN_FAIL_COUNT = 0;
shekhar 25:90cdfbadea91 251 ERROR_CHECK=0;}
shekhar 17:afadd6b988a2 252 }
shekhar 17:afadd6b988a2 253 void writereg(uint8_t reg,uint8_t val)
shekhar 17:afadd6b988a2 254 {
shekhar 25:90cdfbadea91 255
shekhar 17:afadd6b988a2 256 uint8_t count = 0;
shekhar 17:afadd6b988a2 257 for(;;count++)
shekhar 17:afadd6b988a2 258 {
shekhar 17:afadd6b988a2 259 int read_val =0; cs = 0;spi.write(reg | 0x80);spi.write(val);cs = 1;
shekhar 17:afadd6b988a2 260 if(reg != 0x7 && reg != 0x58 && reg != 0xF)
shekhar 17:afadd6b988a2 261 {
shekhar 17:afadd6b988a2 262 read_val = readreg(reg);
shekhar 17:afadd6b988a2 263 if (read_val == val)
shekhar 17:afadd6b988a2 264 {
shekhar 17:afadd6b988a2 265 break;
shekhar 17:afadd6b988a2 266 }
shekhar 17:afadd6b988a2 267 else if(count == 5)
shekhar 17:afadd6b988a2 268 {
shekhar 25:90cdfbadea91 269 reset_rfm(1); printf("reg = 0x%X\n",reg);break;
shekhar 17:afadd6b988a2 270 }
shekhar 25:90cdfbadea91 271 else init_spi();
shekhar 17:afadd6b988a2 272 }
shekhar 17:afadd6b988a2 273 else
shekhar 17:afadd6b988a2 274 break;
shekhar 17:afadd6b988a2 275 }
shekhar 17:afadd6b988a2 276 }
shekhar 17:afadd6b988a2 277 uint8_t readreg(uint8_t reg)
shekhar 17:afadd6b988a2 278 {
shekhar 17:afadd6b988a2 279 uint8_t val;cs = 0;spi.write(reg & ~0x80);val = spi.write(0);cs = 1;return val;
shekhar 17:afadd6b988a2 280 }
shekhar 17:afadd6b988a2 281 void clearTxBuf()
shekhar 17:afadd6b988a2 282 {
shekhar 17:afadd6b988a2 283 writereg(RF22_REG_08_OPERATING_MODE2,0x01);
shekhar 17:afadd6b988a2 284 writereg(RF22_REG_08_OPERATING_MODE2,0x00);
shekhar 17:afadd6b988a2 285 }
shekhar 23:a864d57f10c4 286 uint8_t setFrequency(double centre)
shekhar 17:afadd6b988a2 287 {
shekhar 17:afadd6b988a2 288 uint8_t fbsel = 0x40;
shekhar 17:afadd6b988a2 289 if (centre >= 480.0) {
shekhar 17:afadd6b988a2 290 centre /= 2;
shekhar 17:afadd6b988a2 291 fbsel |= 0x20;
shekhar 23:a864d57f10c4 292 }
shekhar 17:afadd6b988a2 293 centre /= 10.0;
shekhar 17:afadd6b988a2 294 double integerPart = floor(centre);
shekhar 17:afadd6b988a2 295 double fractionalPart = centre - integerPart;
shekhar 17:afadd6b988a2 296
shekhar 17:afadd6b988a2 297 uint8_t fb = (uint8_t)integerPart - 24; // Range 0 to 23
shekhar 17:afadd6b988a2 298 fbsel |= fb;
shekhar 17:afadd6b988a2 299 uint16_t fc = fractionalPart * 64000;
shekhar 17:afadd6b988a2 300 writereg(RF22_REG_73_FREQUENCY_OFFSET1, 0); // REVISIT
shekhar 17:afadd6b988a2 301 writereg(RF22_REG_74_FREQUENCY_OFFSET2, 0);
shekhar 17:afadd6b988a2 302 writereg(RF22_REG_75_FREQUENCY_BAND_SELECT, fbsel);
shekhar 17:afadd6b988a2 303 writereg(RF22_REG_76_NOMINAL_CARRIER_FREQUENCY1, fc >> 8);
shekhar 17:afadd6b988a2 304 writereg(RF22_REG_77_NOMINAL_CARRIER_FREQUENCY0, fc & 0xff);
shekhar 17:afadd6b988a2 305 return 0;
shekhar 17:afadd6b988a2 306 }
shekhar 25:90cdfbadea91 307 void init_spi()
shekhar 17:afadd6b988a2 308 {
shekhar 17:afadd6b988a2 309 cs=1; // chip must be deselected
shekhar 17:afadd6b988a2 310 wait(0.1);
shekhar 17:afadd6b988a2 311 spi.format(8,0);
shekhar 17:afadd6b988a2 312 spi.frequency(10000000); //10MHz SCLK
shekhar 25:90cdfbadea91 313 }
shekhar 25:90cdfbadea91 314 void Init_BEACON_HW()
shekhar 25:90cdfbadea91 315 {
shekhar 25:90cdfbadea91 316 ERROR_CHECK=0;
shekhar 25:90cdfbadea91 317 wait(0.1);
shekhar 25:90cdfbadea91 318 int i = 5;
shekhar 25:90cdfbadea91 319 while(i--)
shekhar 25:90cdfbadea91 320 {
shekhar 25:90cdfbadea91 321 init_spi();
shekhar 17:afadd6b988a2 322
shekhar 17:afadd6b988a2 323 //should either have a flag for invalid SPI or discard this for actual case or add reset
shekhar 17:afadd6b988a2 324 if (readreg(RF22_REG_00_DEVICE_TYPE) == 0x08)
shekhar 25:90cdfbadea91 325 {pc_bcn.printf("spi connection valid\r\n");
shekhar 25:90cdfbadea91 326 reset_rfm(0);break;}
shekhar 25:90cdfbadea91 327 else if (i == 1)
shekhar 24:ca96cddf25d0 328 {pc_bcn.printf("error in spi connection\r\n");
shekhar 25:90cdfbadea91 329 reset_rfm(1);
shekhar 25:90cdfbadea91 330 return;
shekhar 17:afadd6b988a2 331 }
shekhar 25:90cdfbadea91 332 }
shekhar 17:afadd6b988a2 333
shekhar 17:afadd6b988a2 334 writereg(RF22_REG_07_OPERATING_MODE1,0x80); //sw_reset
shekhar 17:afadd6b988a2 335 wait(0.1); //takes time to reset
shekhar 17:afadd6b988a2 336
shekhar 17:afadd6b988a2 337 clearTxBuf();
shekhar 17:afadd6b988a2 338
shekhar 17:afadd6b988a2 339 writereg(RF22_REG_07_OPERATING_MODE1,0x00); //standby mode
shekhar 17:afadd6b988a2 340
shekhar 17:afadd6b988a2 341 //txfifoalmostempty
shekhar 17:afadd6b988a2 342 writereg(RF22_REG_7D_TX_FIFO_CONTROL2,30);
shekhar 17:afadd6b988a2 343
shekhar 17:afadd6b988a2 344 //Packet-engine registers
shekhar 17:afadd6b988a2 345 writereg(RF22_REG_30_DATA_ACCESS_CONTROL,0x00);
shekhar 17:afadd6b988a2 346
shekhar 17:afadd6b988a2 347 writereg(RF22_REG_33_HEADER_CONTROL2,0x08);
shekhar 17:afadd6b988a2 348 writereg(RF22_REG_34_PREAMBLE_LENGTH,0x00);
shekhar 17:afadd6b988a2 349
shekhar 17:afadd6b988a2 350 writereg(RF22_REG_0B_GPIO_CONFIGURATION0,0x15); // TX state
shekhar 17:afadd6b988a2 351 writereg(RF22_REG_0C_GPIO_CONFIGURATION1,0x12); // RX state
shekhar 17:afadd6b988a2 352
shekhar 23:a864d57f10c4 353 setFrequency(435.0);
shekhar 25:90cdfbadea91 354
shekhar 25:90cdfbadea91 355 i=3;
shekhar 25:90cdfbadea91 356 while(i--)
shekhar 17:afadd6b988a2 357 if((readreg(RF22_REG_02_DEVICE_STATUS)& 0x08)!= 0x00)
shekhar 17:afadd6b988a2 358 {
shekhar 25:90cdfbadea91 359 setFrequency(435.0);
shekhar 25:90cdfbadea91 360 if (i==1)
shekhar 25:90cdfbadea91 361 {pc_bcn.printf("frequency not set properly\r\n");
shekhar 25:90cdfbadea91 362 reset_rfm(1);}
shekhar 17:afadd6b988a2 363 }
shekhar 17:afadd6b988a2 364
shekhar 17:afadd6b988a2 365 //set Modem Configuration
shekhar 17:afadd6b988a2 366 writereg(RF22_REG_58,0x80);
shekhar 17:afadd6b988a2 367
shekhar 17:afadd6b988a2 368 //Data rate set later
shekhar 17:afadd6b988a2 369
shekhar 17:afadd6b988a2 370 writereg(RF22_REG_70_MODULATION_CONTROL1,0x20);
shekhar 17:afadd6b988a2 371 writereg(RF22_REG_71_MODULATION_CONTROL2,0x21);//ook = 0x21
shekhar 17:afadd6b988a2 372
shekhar 17:afadd6b988a2 373 //set tx power
shekhar 17:afadd6b988a2 374 writereg(RF22_REG_6D_TX_POWER,0x07); //20dbm
shekhar 17:afadd6b988a2 375
shekhar 17:afadd6b988a2 376 //TX_packet_length written later
shekhar 25:90cdfbadea91 377 ERROR_CHECK = 0;
shekhar 17:afadd6b988a2 378 }
shekhar 17:afadd6b988a2 379 bool Check_ACK_RECEIVED()
shekhar 17:afadd6b988a2 380 {
shekhar 17:afadd6b988a2 381 if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x04) == 0x04)
shekhar 17:afadd6b988a2 382 {
shekhar 17:afadd6b988a2 383 printf("Packet sent: ACK received\r\n");
shekhar 17:afadd6b988a2 384 return 1;
shekhar 17:afadd6b988a2 385 }
shekhar 17:afadd6b988a2 386 else
shekhar 17:afadd6b988a2 387 {
shekhar 24:ca96cddf25d0 388 pc_bcn.printf("Packet not sent\r\n");
shekhar 17:afadd6b988a2 389 return 0;
shekhar 17:afadd6b988a2 390 }
shekhar 17:afadd6b988a2 391 }
shekhar 25:90cdfbadea91 392 int main()
shekhar 17:afadd6b988a2 393 {
shekhar 17:afadd6b988a2 394 FCTN_BCN_INIT();
shekhar 17:afadd6b988a2 395
shekhar 17:afadd6b988a2 396 loop.attach(&FCTN_BCN_TX_MAIN, 10.0);//in actual case its 30.0
shekhar 17:afadd6b988a2 397
shekhar 17:afadd6b988a2 398 while(1);
shekhar 17:afadd6b988a2 399
shekhar 25:90cdfbadea91 400 }