pradeep shekhar / Mbed 2 deprecated BEACON_CODE

Repository for final Beacon code of IITMSAT

Dependencies:   mbed

BCN.cpp@19:6863457ea3d1, 2015-10-30 (annotated)

Committer:
shekhar
Date:
Fri Oct 30 06:32:46 2015 +0000
Revision:
19:6863457ea3d1
Parent:
18:3d8e70286f67
Child:
20:89b6bb0859a1
changed secs to usecs

Who changed what in which revision?

UserRevisionLine numberNew contents of line
shekhar 18:3d8e70286f67 1 #include "BCN.h"
shekhar 17:afadd6b988a2 2 //Check the pin names
shekhar 17:afadd6b988a2 3 //Takes max 4.3 sec in void FCTN_BCN_TX_MAIN() (temp.calc. + long_beacon + short_beacon)
shekhar 17:afadd6b988a2 4
shekhar 17:afadd6b988a2 5 Serial pc(USBTX, USBRX); //tx,rx
shekhar 17:afadd6b988a2 6 SPI spi(D11, D12, D13); // mosi, miso, sclk
shekhar 17:afadd6b988a2 7 DigitalOut cs(D10); //slave select or chip select
shekhar 17:afadd6b988a2 8 Timer t_i;
shekhar 19:6863457ea3d1 9 Timeout rf_sl_timeout;
shekhar 18:3d8e70286f67 10 Ticker loop;
shekhar 17:afadd6b988a2 11
shekhar 17:afadd6b988a2 12 //GLOBAL VARIABLES
shekhar 17:afadd6b988a2 13 uint8_t BCN_INIT_STATUS = 0;
shekhar 17:afadd6b988a2 14 uint8_t BCN_TX_MAIN_STATUS = 0;
shekhar 17:afadd6b988a2 15 uint8_t BCN_TX_STATUS = 0;
shekhar 17:afadd6b988a2 16 uint8_t BCN_TX_EN = 1; //hardcoding for now //check where is this variable toggled??
shekhar 19:6863457ea3d1 17 uint8_t BCN_FEN = 0; //hardcoding for now //write this value to flash
shekhar 17:afadd6b988a2 18 uint8_t BCN_STANDBY = 0; //hardcoding for now //check where is this variable toggled??
shekhar 17:afadd6b988a2 19 uint8_t BCN_TS_BUFFER = 0; // For Temperature
shekhar 17:afadd6b988a2 20
shekhar 17:afadd6b988a2 21 void FCTN_BCN_INIT()
shekhar 17:afadd6b988a2 22 {
shekhar 17:afadd6b988a2 23 pc.printf("FCTN_BCN_INIT\n");
shekhar 17:afadd6b988a2 24 BCN_INIT_STATUS = 1;
shekhar 18:3d8e70286f67 25 if(BCN_FEN == 0)
shekhar 19:6863457ea3d1 26 rf_sl_timeout.attach(&FCTN_BCN_FEN, 30);
shekhar 17:afadd6b988a2 27 Init_BEACON_HW();
shekhar 17:afadd6b988a2 28 BCN_INIT_STATUS = 0;
shekhar 17:afadd6b988a2 29 }
shekhar 17:afadd6b988a2 30 void FCTN_BCN_FEN()
shekhar 17:afadd6b988a2 31 {
shekhar 17:afadd6b988a2 32 pc.printf("FCTN_FEN\n");
shekhar 17:afadd6b988a2 33 BCN_FEN = 1;//write this value to flash
shekhar 17:afadd6b988a2 34 }
shekhar 17:afadd6b988a2 35 void FCTN_BCN_TX_MAIN()
shekhar 17:afadd6b988a2 36 {
shekhar 17:afadd6b988a2 37 pc.printf("FCTN_BCN_TX_MAIN\n");
shekhar 17:afadd6b988a2 38 t_i.start();
shekhar 17:afadd6b988a2 39 int begin = t_i.read_us();
shekhar 17:afadd6b988a2 40 BCN_TX_MAIN_STATUS = 1;
shekhar 17:afadd6b988a2 41
shekhar 17:afadd6b988a2 42 if(BCN_FEN == 1)
shekhar 17:afadd6b988a2 43 {
shekhar 17:afadd6b988a2 44 if(BCN_TX_EN == 1)
shekhar 17:afadd6b988a2 45 {
shekhar 17:afadd6b988a2 46 //Measure and store BCN temperature in BCN_TS_BUFFER
shekhar 17:afadd6b988a2 47 BCN_TS_BUFFER = check_Temperature();
shekhar 17:afadd6b988a2 48 pc.printf("\n\ntemperature = %d\n\n",BCN_TS_BUFFER);
shekhar 17:afadd6b988a2 49 //Get BCN_HK data from BCN HW(SPI) //Store BCN_HK data in BCN_HK_BUFFER
shekhar 17:afadd6b988a2 50 if(BCN_STANDBY == 1 )
shekhar 17:afadd6b988a2 51 {
shekhar 17:afadd6b988a2 52 Set_BCN_TX_STATUS(BCN_TX_STANDBY);
shekhar 17:afadd6b988a2 53 BCN_TX_MAIN_STATUS = 0;
shekhar 17:afadd6b988a2 54
shekhar 17:afadd6b988a2 55 // break;
shekhar 17:afadd6b988a2 56 }
shekhar 17:afadd6b988a2 57 else
shekhar 17:afadd6b988a2 58 {
shekhar 17:afadd6b988a2 59 //transmit short beacon and long beacon
shekhar 17:afadd6b988a2 60 SHORT_BCN_TX();
shekhar 17:afadd6b988a2 61 LONG_BCN_TX();
shekhar 17:afadd6b988a2 62
shekhar 17:afadd6b988a2 63 if(Check_ACK_RECEIVED() == 1)
shekhar 17:afadd6b988a2 64 {
shekhar 17:afadd6b988a2 65 Set_BCN_TX_STATUS(BCN_TX_SUCCESS);
shekhar 17:afadd6b988a2 66 BCN_TX_MAIN_STATUS = 0;
shekhar 17:afadd6b988a2 67 }
shekhar 17:afadd6b988a2 68 else
shekhar 17:afadd6b988a2 69 {
shekhar 17:afadd6b988a2 70 Set_BCN_TX_STATUS(BCN_TX_FAILURE);
shekhar 17:afadd6b988a2 71 BCN_TX_MAIN_STATUS = 0;
shekhar 17:afadd6b988a2 72
shekhar 17:afadd6b988a2 73 }
shekhar 17:afadd6b988a2 74 }
shekhar 17:afadd6b988a2 75 }
shekhar 17:afadd6b988a2 76 else
shekhar 17:afadd6b988a2 77 {
shekhar 17:afadd6b988a2 78 Set_BCN_TX_STATUS(BCN_TX_DISABLED);
shekhar 17:afadd6b988a2 79 BCN_TX_MAIN_STATUS = 0;
shekhar 17:afadd6b988a2 80 }
shekhar 17:afadd6b988a2 81 }
shekhar 17:afadd6b988a2 82 else
shekhar 17:afadd6b988a2 83 {
shekhar 17:afadd6b988a2 84 Set_BCN_TX_STATUS(BCN_RF_SILENCE); //Window of RF Silence: None of the Txs should be on.
shekhar 17:afadd6b988a2 85 BCN_TX_MAIN_STATUS = 0;
shekhar 17:afadd6b988a2 86 }
shekhar 17:afadd6b988a2 87 t_i.stop();
shekhar 17:afadd6b988a2 88 int end = t_i.read_us();
shekhar 19:6863457ea3d1 89 pc.printf("The time required for FCTN_BCN_TX_MAIN is %d useconds\r\n", end-begin);
shekhar 17:afadd6b988a2 90
shekhar 17:afadd6b988a2 91 }
shekhar 17:afadd6b988a2 92
shekhar 17:afadd6b988a2 93 void Set_BCN_TX_STATUS(uint8_t STATUS)
shekhar 17:afadd6b988a2 94 {
shekhar 17:afadd6b988a2 95 BCN_TX_STATUS = STATUS;
shekhar 17:afadd6b988a2 96 }
shekhar 17:afadd6b988a2 97
shekhar 17:afadd6b988a2 98 uint8_t check_Temperature()
shekhar 17:afadd6b988a2 99 {
shekhar 17:afadd6b988a2 100 uint8_t temperature;
shekhar 17:afadd6b988a2 101 writereg(RF22_REG_0F_ADC_CONFIGURATION,0x80);
shekhar 17:afadd6b988a2 102 writereg(RF22_REG_12_Temperature_Sensor_Calibration,0x20);
shekhar 17:afadd6b988a2 103 wait(0.1);
shekhar 17:afadd6b988a2 104 temperature = readreg(RF22_REG_11_ADC_Value);
shekhar 17:afadd6b988a2 105 temperature = (float)temperature*0.5 - 64;
shekhar 17:afadd6b988a2 106 return temperature;
shekhar 17:afadd6b988a2 107 }
shekhar 17:afadd6b988a2 108
shekhar 17:afadd6b988a2 109 void SHORT_BCN_TX()
shekhar 17:afadd6b988a2 110 {
shekhar 17:afadd6b988a2 111 writereg(RF22_REG_6E_TX_DATA_RATE,0x01);
shekhar 17:afadd6b988a2 112 writereg(RF22_REG_6F_TX_DATA_RATE,0x4F);//160bps
shekhar 17:afadd6b988a2 113 writereg(RF22_REG_3E_PACKET_LENGTH,SHORT_TX_DATA); //short packet length
shekhar 17:afadd6b988a2 114 wait(0.02);
shekhar 17:afadd6b988a2 115
shekhar 17:afadd6b988a2 116 uint32_t timeout_count = 10e5;
shekhar 17:afadd6b988a2 117 //extract values from short_beacon[]
shekhar 17:afadd6b988a2 118
shekhar 17:afadd6b988a2 119 struct Short_beacon
shekhar 17:afadd6b988a2 120 {
shekhar 17:afadd6b988a2 121 uint8_t Voltage[1];
shekhar 17:afadd6b988a2 122 uint8_t AngularSpeed[2];
shekhar 17:afadd6b988a2 123 uint8_t SubsystemStatus[1];
shekhar 17:afadd6b988a2 124 uint8_t Temp[3];
shekhar 17:afadd6b988a2 125 uint8_t ErrorFlag[1];
shekhar 17:afadd6b988a2 126 }Shortbeacon = { {0x88}, {0x99, 0xAA} , {0xAA},{0xAA,0xDD,0xEE}, {0x00} };
shekhar 17:afadd6b988a2 127
shekhar 17:afadd6b988a2 128 //filling hk data
shekhar 17:afadd6b988a2 129 //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 130 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 131
shekhar 17:afadd6b988a2 132 //writereg(RF22_REG_07_OPERATING_MODE1,0x01); //ready mode ??
shekhar 17:afadd6b988a2 133 clearTxBuf();
shekhar 17:afadd6b988a2 134 //writing data first time
shekhar 17:afadd6b988a2 135 int byte = 0;
shekhar 17:afadd6b988a2 136 cs = 0;
shekhar 17:afadd6b988a2 137 spi.write(0xFF);
shekhar 17:afadd6b988a2 138
shekhar 17:afadd6b988a2 139 for (int byte_counter = 0; byte_counter <15 ; byte_counter++)
shekhar 17:afadd6b988a2 140 {
shekhar 17:afadd6b988a2 141 for(int j = 3; j >= 0 ; j--)
shekhar 17:afadd6b988a2 142 {
shekhar 17:afadd6b988a2 143 if((short_beacon[byte_counter] & (uint8_t) pow(2.0,(j*2+1)))!= pow(2.0,(j*2+1)))
shekhar 17:afadd6b988a2 144 {
shekhar 17:afadd6b988a2 145 byte=0x00;
shekhar 17:afadd6b988a2 146 }
shekhar 17:afadd6b988a2 147 else
shekhar 17:afadd6b988a2 148 {
shekhar 17:afadd6b988a2 149 byte=0xF0;
shekhar 17:afadd6b988a2 150 }
shekhar 17:afadd6b988a2 151 if((short_beacon[byte_counter] & (uint8_t) pow(2.0,j*2))!= pow(2.0,j*2))
shekhar 17:afadd6b988a2 152 {
shekhar 17:afadd6b988a2 153 byte=byte | 0x00;
shekhar 17:afadd6b988a2 154 }
shekhar 17:afadd6b988a2 155 else
shekhar 17:afadd6b988a2 156 {
shekhar 17:afadd6b988a2 157 byte=byte | 0x0F;
shekhar 17:afadd6b988a2 158 }
shekhar 17:afadd6b988a2 159 spi.write(byte);
shekhar 17:afadd6b988a2 160 }
shekhar 17:afadd6b988a2 161 }
shekhar 17:afadd6b988a2 162
shekhar 17:afadd6b988a2 163 cs = 1;
shekhar 17:afadd6b988a2 164
shekhar 17:afadd6b988a2 165 //Set to Tx mode
shekhar 17:afadd6b988a2 166 writereg(RF22_REG_07_OPERATING_MODE1,0x09);
shekhar 17:afadd6b988a2 167 wait(0.1);
shekhar 17:afadd6b988a2 168 //Check for fifoThresh
shekhar 17:afadd6b988a2 169 while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x20) == 0x20)break;
shekhar 17:afadd6b988a2 170 timeout_count=10e5;
shekhar 17:afadd6b988a2 171
shekhar 17:afadd6b988a2 172 //Check for packet_sent
shekhar 17:afadd6b988a2 173 while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x04) == 0x04)break;
shekhar 17:afadd6b988a2 174
shekhar 17:afadd6b988a2 175 //pc.printf("Short packet sent\r\n");
shekhar 17:afadd6b988a2 176
shekhar 17:afadd6b988a2 177 writereg(RF22_REG_07_OPERATING_MODE1,0x00); //standby mode
shekhar 17:afadd6b988a2 178
shekhar 17:afadd6b988a2 179 }
shekhar 17:afadd6b988a2 180 void LONG_BCN_TX()
shekhar 17:afadd6b988a2 181 {
shekhar 17:afadd6b988a2 182 writereg(RF22_REG_6E_TX_DATA_RATE,0x04);
shekhar 17:afadd6b988a2 183 writereg(RF22_REG_6F_TX_DATA_RATE,0xEA);//600 bps
shekhar 17:afadd6b988a2 184 writereg(RF22_REG_3E_PACKET_LENGTH,LONG_TX_DATA); //long packet length
shekhar 17:afadd6b988a2 185 wait(0.02);
shekhar 17:afadd6b988a2 186 uint32_t timeout_count=10e5;
shekhar 17:afadd6b988a2 187
shekhar 17:afadd6b988a2 188 //get long_beacon array
shekhar 17:afadd6b988a2 189
shekhar 17:afadd6b988a2 190 uint8_t Long_beacon[75];
shekhar 17:afadd6b988a2 191 for(int i = 0;i<75;i++)
shekhar 17:afadd6b988a2 192 {
shekhar 17:afadd6b988a2 193 Long_beacon[i] = 0xA0;
shekhar 17:afadd6b988a2 194 }
shekhar 17:afadd6b988a2 195
shekhar 17:afadd6b988a2 196
shekhar 17:afadd6b988a2 197
shekhar 17:afadd6b988a2 198
shekhar 17:afadd6b988a2 199 //setModeIdle();
shekhar 17:afadd6b988a2 200 writereg(RF22_REG_07_OPERATING_MODE1,0x01); //ready mode
shekhar 17:afadd6b988a2 201 clearTxBuf();
shekhar 17:afadd6b988a2 202 //writing data first time
shekhar 17:afadd6b988a2 203 cs = 0;
shekhar 17:afadd6b988a2 204 spi.write(0xFF);
shekhar 17:afadd6b988a2 205 for(int i=0; i<60;i++)
shekhar 17:afadd6b988a2 206 {
shekhar 17:afadd6b988a2 207 spi.write(Long_beacon[i]);
shekhar 17:afadd6b988a2 208 }
shekhar 17:afadd6b988a2 209 cs = 1;
shekhar 17:afadd6b988a2 210
shekhar 17:afadd6b988a2 211 //Set to Tx mode
shekhar 17:afadd6b988a2 212 writereg(RF22_REG_07_OPERATING_MODE1,0x09);
shekhar 17:afadd6b988a2 213 wait(0.1);
shekhar 17:afadd6b988a2 214
shekhar 17:afadd6b988a2 215 //Check for fifoThresh
shekhar 17:afadd6b988a2 216 while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x20) == 0x20)break;
shekhar 17:afadd6b988a2 217 timeout_count=10e5;
shekhar 17:afadd6b988a2 218
shekhar 17:afadd6b988a2 219 cs = 0;
shekhar 17:afadd6b988a2 220 spi.write(0xFF);
shekhar 17:afadd6b988a2 221 for(int i=60; i<75;i++)
shekhar 17:afadd6b988a2 222 {
shekhar 17:afadd6b988a2 223 spi.write(Long_beacon[i]);
shekhar 17:afadd6b988a2 224 }
shekhar 17:afadd6b988a2 225 cs = 1;
shekhar 17:afadd6b988a2 226 wait(0.1);
shekhar 17:afadd6b988a2 227 //Check for fifoThresh
shekhar 17:afadd6b988a2 228 while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x20) == 0x20)break;
shekhar 17:afadd6b988a2 229 timeout_count=10e5;
shekhar 17:afadd6b988a2 230
shekhar 17:afadd6b988a2 231 //Check for packetsent interrupt
shekhar 17:afadd6b988a2 232 while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x04) == 0x04)break;
shekhar 17:afadd6b988a2 233
shekhar 17:afadd6b988a2 234 //pc.printf("Long packet sent\r\n");
shekhar 17:afadd6b988a2 235
shekhar 17:afadd6b988a2 236 writereg(RF22_REG_07_OPERATING_MODE1,0x00); //standby mode
shekhar 17:afadd6b988a2 237 }
shekhar 17:afadd6b988a2 238 void reset_uC()
shekhar 17:afadd6b988a2 239 {
shekhar 17:afadd6b988a2 240 FCTN_BCN_INIT();
shekhar 17:afadd6b988a2 241 }
shekhar 17:afadd6b988a2 242 void writereg(uint8_t reg,uint8_t val)
shekhar 17:afadd6b988a2 243 {
shekhar 17:afadd6b988a2 244 uint8_t count = 0;
shekhar 17:afadd6b988a2 245 for(;;count++)
shekhar 17:afadd6b988a2 246 {
shekhar 17:afadd6b988a2 247 int read_val =0; cs = 0;spi.write(reg | 0x80);spi.write(val);cs = 1;
shekhar 17:afadd6b988a2 248 if(reg != 0x7 && reg != 0x58 && reg != 0xF)
shekhar 17:afadd6b988a2 249 {
shekhar 17:afadd6b988a2 250 read_val = readreg(reg);
shekhar 17:afadd6b988a2 251 if (read_val == val)
shekhar 17:afadd6b988a2 252 {
shekhar 17:afadd6b988a2 253 break;
shekhar 17:afadd6b988a2 254 }
shekhar 17:afadd6b988a2 255 else if(count == 5)
shekhar 17:afadd6b988a2 256 {
shekhar 17:afadd6b988a2 257 reset_uC(), printf("reg = 0x%X\n",reg);break;
shekhar 17:afadd6b988a2 258 }
shekhar 17:afadd6b988a2 259 }
shekhar 17:afadd6b988a2 260 else
shekhar 17:afadd6b988a2 261 break;
shekhar 17:afadd6b988a2 262 }
shekhar 17:afadd6b988a2 263 }
shekhar 17:afadd6b988a2 264 uint8_t readreg(uint8_t reg)
shekhar 17:afadd6b988a2 265 {
shekhar 17:afadd6b988a2 266 uint8_t val;cs = 0;spi.write(reg & ~0x80);val = spi.write(0);cs = 1;return val;
shekhar 17:afadd6b988a2 267 }
shekhar 17:afadd6b988a2 268 void clearTxBuf()
shekhar 17:afadd6b988a2 269 {
shekhar 17:afadd6b988a2 270 writereg(RF22_REG_08_OPERATING_MODE2,0x01);
shekhar 17:afadd6b988a2 271 writereg(RF22_REG_08_OPERATING_MODE2,0x00);
shekhar 17:afadd6b988a2 272 }
shekhar 17:afadd6b988a2 273 uint8_t setFrequency(double centre,float afcPullInRange)
shekhar 17:afadd6b988a2 274 {
shekhar 17:afadd6b988a2 275 uint8_t fbsel = 0x40;
shekhar 17:afadd6b988a2 276 uint8_t afclimiter;
shekhar 17:afadd6b988a2 277 if (centre >= 480.0) {
shekhar 17:afadd6b988a2 278 centre /= 2;
shekhar 17:afadd6b988a2 279 fbsel |= 0x20;
shekhar 17:afadd6b988a2 280 afclimiter = afcPullInRange * 1000000.0 / 1250.0;
shekhar 17:afadd6b988a2 281 } else {
shekhar 17:afadd6b988a2 282 if (afcPullInRange < 0.0 || afcPullInRange > 0.159375)
shekhar 17:afadd6b988a2 283 return false;
shekhar 17:afadd6b988a2 284 afclimiter = afcPullInRange * 1000000.0 / 625.0;
shekhar 17:afadd6b988a2 285 }
shekhar 17:afadd6b988a2 286 centre /= 10.0;
shekhar 17:afadd6b988a2 287 double integerPart = floor(centre);
shekhar 17:afadd6b988a2 288 double fractionalPart = centre - integerPart;
shekhar 17:afadd6b988a2 289
shekhar 17:afadd6b988a2 290 uint8_t fb = (uint8_t)integerPart - 24; // Range 0 to 23
shekhar 17:afadd6b988a2 291 fbsel |= fb;
shekhar 17:afadd6b988a2 292 uint16_t fc = fractionalPart * 64000;
shekhar 17:afadd6b988a2 293 writereg(RF22_REG_73_FREQUENCY_OFFSET1, 0); // REVISIT
shekhar 17:afadd6b988a2 294 writereg(RF22_REG_74_FREQUENCY_OFFSET2, 0);
shekhar 17:afadd6b988a2 295 writereg(RF22_REG_75_FREQUENCY_BAND_SELECT, fbsel);
shekhar 17:afadd6b988a2 296 writereg(RF22_REG_76_NOMINAL_CARRIER_FREQUENCY1, fc >> 8);
shekhar 17:afadd6b988a2 297 writereg(RF22_REG_77_NOMINAL_CARRIER_FREQUENCY0, fc & 0xff);
shekhar 17:afadd6b988a2 298 writereg(RF22_REG_2A_AFC_LIMITER, afclimiter);
shekhar 17:afadd6b988a2 299 return 0;
shekhar 17:afadd6b988a2 300 }
shekhar 17:afadd6b988a2 301
shekhar 17:afadd6b988a2 302
shekhar 17:afadd6b988a2 303 void Init_BEACON_HW()
shekhar 17:afadd6b988a2 304 {
shekhar 17:afadd6b988a2 305 wait(0.1);
shekhar 17:afadd6b988a2 306 cs=1; // chip must be deselected
shekhar 17:afadd6b988a2 307 wait(0.1);
shekhar 17:afadd6b988a2 308 spi.format(8,0);
shekhar 17:afadd6b988a2 309 spi.frequency(10000000); //10MHz SCLK
shekhar 17:afadd6b988a2 310
shekhar 17:afadd6b988a2 311 //should either have a flag for invalid SPI or discard this for actual case or add reset
shekhar 17:afadd6b988a2 312 if (readreg(RF22_REG_00_DEVICE_TYPE) == 0x08)
shekhar 17:afadd6b988a2 313 pc.printf("spi connection valid\r\n");
shekhar 17:afadd6b988a2 314 else
shekhar 17:afadd6b988a2 315 {pc.printf("error in spi connection\r\n");
shekhar 17:afadd6b988a2 316 reset_uC();
shekhar 17:afadd6b988a2 317 }
shekhar 17:afadd6b988a2 318
shekhar 17:afadd6b988a2 319 writereg(RF22_REG_07_OPERATING_MODE1,0x80); //sw_reset
shekhar 17:afadd6b988a2 320 wait(0.1); //takes time to reset
shekhar 17:afadd6b988a2 321
shekhar 17:afadd6b988a2 322 clearTxBuf();
shekhar 17:afadd6b988a2 323
shekhar 17:afadd6b988a2 324 writereg(RF22_REG_07_OPERATING_MODE1,0x00); //standby mode
shekhar 17:afadd6b988a2 325
shekhar 17:afadd6b988a2 326 //txfifoalmostempty
shekhar 17:afadd6b988a2 327 writereg(RF22_REG_7D_TX_FIFO_CONTROL2,30);
shekhar 17:afadd6b988a2 328
shekhar 17:afadd6b988a2 329 //Packet-engine registers
shekhar 17:afadd6b988a2 330 writereg(RF22_REG_30_DATA_ACCESS_CONTROL,0x00);
shekhar 17:afadd6b988a2 331
shekhar 17:afadd6b988a2 332 writereg(RF22_REG_33_HEADER_CONTROL2,0x08);
shekhar 17:afadd6b988a2 333 writereg(RF22_REG_34_PREAMBLE_LENGTH,0x00);
shekhar 17:afadd6b988a2 334
shekhar 17:afadd6b988a2 335 writereg(RF22_REG_0B_GPIO_CONFIGURATION0,0x15); // TX state
shekhar 17:afadd6b988a2 336 writereg(RF22_REG_0C_GPIO_CONFIGURATION1,0x12); // RX state
shekhar 17:afadd6b988a2 337
shekhar 18:3d8e70286f67 338 setFrequency(435.0,0.05);
shekhar 17:afadd6b988a2 339
shekhar 17:afadd6b988a2 340 if((readreg(RF22_REG_02_DEVICE_STATUS)& 0x08)!= 0x00)
shekhar 17:afadd6b988a2 341 {
shekhar 17:afadd6b988a2 342 pc.printf("frequency not set properly\r\n");
shekhar 17:afadd6b988a2 343 reset_uC();
shekhar 17:afadd6b988a2 344 }
shekhar 17:afadd6b988a2 345
shekhar 17:afadd6b988a2 346 //set Modem Configuration
shekhar 17:afadd6b988a2 347 writereg(RF22_REG_1C_IF_FILTER_BANDWIDTH,0xdf);
shekhar 17:afadd6b988a2 348 writereg(RF22_REG_1F_CLOCK_RECOVERY_GEARSHIFT_OVERRIDE,0x03);
shekhar 17:afadd6b988a2 349 writereg(RF22_REG_20_CLOCK_RECOVERY_OVERSAMPLING_RATE,0x39);
shekhar 17:afadd6b988a2 350 writereg(RF22_REG_21_CLOCK_RECOVERY_OFFSET2,0x20);
shekhar 17:afadd6b988a2 351 writereg(RF22_REG_22_CLOCK_RECOVERY_OFFSET1,0x68); //updated 20 to 25 reg values from excel sheet for 1.2 Khz freq. deviation,fsk
shekhar 17:afadd6b988a2 352 writereg(RF22_REG_23_CLOCK_RECOVERY_OFFSET0,0xdc);
shekhar 17:afadd6b988a2 353 writereg(RF22_REG_24_CLOCK_RECOVERY_TIMING_LOOP_GAIN1,0x00);
shekhar 17:afadd6b988a2 354 writereg(RF22_REG_25_CLOCK_RECOVERY_TIMING_LOOP_GAIN0,0x6B);
shekhar 17:afadd6b988a2 355 writereg(RF22_REG_2C_OOK_COUNTER_VALUE_1,0x2C);
shekhar 17:afadd6b988a2 356 writereg(RF22_REG_2D_OOK_COUNTER_VALUE_2,0x11); //not required for fsk (OOK counter value)
shekhar 17:afadd6b988a2 357 writereg(RF22_REG_2E_SLICER_PEAK_HOLD,0x2A); //??
shekhar 17:afadd6b988a2 358 writereg(RF22_REG_58,0x80);
shekhar 17:afadd6b988a2 359 writereg(RF22_REG_69_AGC_OVERRIDE1,0x60);
shekhar 17:afadd6b988a2 360
shekhar 17:afadd6b988a2 361 //Data rate set later
shekhar 17:afadd6b988a2 362
shekhar 17:afadd6b988a2 363 writereg(RF22_REG_70_MODULATION_CONTROL1,0x20);
shekhar 17:afadd6b988a2 364 writereg(RF22_REG_71_MODULATION_CONTROL2,0x21);//ook = 0x21
shekhar 17:afadd6b988a2 365
shekhar 17:afadd6b988a2 366 //set tx power
shekhar 17:afadd6b988a2 367 writereg(RF22_REG_6D_TX_POWER,0x07); //20dbm
shekhar 17:afadd6b988a2 368
shekhar 17:afadd6b988a2 369 //TX_packet_length written later
shekhar 17:afadd6b988a2 370 }
shekhar 17:afadd6b988a2 371 bool Check_ACK_RECEIVED()
shekhar 17:afadd6b988a2 372 {
shekhar 17:afadd6b988a2 373 if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x04) == 0x04)
shekhar 17:afadd6b988a2 374 {
shekhar 17:afadd6b988a2 375 printf("Packet sent: ACK received\r\n");
shekhar 17:afadd6b988a2 376 return 1;
shekhar 17:afadd6b988a2 377 }
shekhar 17:afadd6b988a2 378 else
shekhar 17:afadd6b988a2 379 {
shekhar 17:afadd6b988a2 380 pc.printf("Packet not sent\r\n");
shekhar 17:afadd6b988a2 381 return 0;
shekhar 17:afadd6b988a2 382 }
shekhar 17:afadd6b988a2 383 }
shekhar 18:3d8e70286f67 384 int main()
shekhar 17:afadd6b988a2 385 {
shekhar 17:afadd6b988a2 386 FCTN_BCN_INIT();
shekhar 17:afadd6b988a2 387
shekhar 17:afadd6b988a2 388 loop.attach(&FCTN_BCN_TX_MAIN, 10.0);//in actual case its 30.0
shekhar 17:afadd6b988a2 389
shekhar 17:afadd6b988a2 390 while(1);
shekhar 17:afadd6b988a2 391
shekhar 18:3d8e70286f67 392 }