Team Fox / Mbed 2 deprecated Japan_BAE_sensorworking

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Dependencies:   FreescaleIAP mbed-rtos mbed

Fork of Japan_BAE1 by Team Fox

BCN.cpp@12:af1d7e18b868, 2016-04-13 (annotated)

Committer:
Bragadeesh153
Date:
Wed Apr 13 18:34:28 2016 +0000
Revision:
12:af1d7e18b868
Parent:
11:1fdb94ae6563
Child:
13:fb7facaf308b
Working

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Bragadeesh153 12:af1d7e18b868 1
sakthipriya 0:7b4c00e3912f 2 #include "BCN.h"
sakthipriya 0:7b4c00e3912f 3 #include <stdio.h>
sakthipriya 0:7b4c00e3912f 4 #include "pin_config.h"
Bragadeesh153 12:af1d7e18b868 5 //Check the pin names
Bragadeesh153 12:af1d7e18b868 6 //Takes max 4.3 sec in void FCTN_BCN_TX_MAIN() (temp.calc. + long_beacon + short_beacon)
sakthipriya 0:7b4c00e3912f 7
sakthipriya 0:7b4c00e3912f 8 Serial pc_bcn(USBTX, USBRX); //tx,rx
Bragadeesh153 12:af1d7e18b868 9 SPI spi(PIN16, PIN17, PIN15); // mosi, miso, sclk
Bragadeesh153 12:af1d7e18b868 10 DigitalOut cs(PIN87); //slave select or chip select
sakthipriya 0:7b4c00e3912f 11 Timer t_i;
Bragadeesh153 12:af1d7e18b868 12 Timeout rf_sl_timeout;
sakthipriya 0:7b4c00e3912f 13 Ticker loop;
sakthipriya 0:7b4c00e3912f 14
sakthipriya 0:7b4c00e3912f 15
sakthipriya 0:7b4c00e3912f 16 //GLOBAL VARIABLES
Bragadeesh153 12:af1d7e18b868 17 uint8_t BCN_INIT_STATUS = 0;
Bragadeesh153 12:af1d7e18b868 18 uint8_t BCN_TX_MAIN_STATUS = 0;
Bragadeesh153 12:af1d7e18b868 19 uint8_t BCN_TX_STATUS = 0;
sakthipriya 0:7b4c00e3912f 20 uint8_t BCN_TX_EN = 1; //hardcoding for now //check where is this variable toggled??
Bragadeesh153 12:af1d7e18b868 21 uint8_t BCN_FEN = 0; //hardcoding for now //write this value to flash
sakthipriya 0:7b4c00e3912f 22 uint8_t BCN_STANDBY = 0; //hardcoding for now //check where is this variable toggled??
Bragadeesh153 12:af1d7e18b868 23 uint8_t BCN_TS_BUFFER = 0; // For Temperature
Bragadeesh153 12:af1d7e18b868 24 uint8_t BCN_FAIL_COUNT=0;
sakthipriya 0:7b4c00e3912f 25
Bragadeesh153 12:af1d7e18b868 26 void FCTN_BCN_INIT()
sakthipriya 0:7b4c00e3912f 27 {
Bragadeesh153 12:af1d7e18b868 28 pc_bcn.printf("FCTN_BCN_INIT\n");
sakthipriya 0:7b4c00e3912f 29 BCN_INIT_STATUS = 1;
Bragadeesh153 12:af1d7e18b868 30 if(BCN_FEN == 0)
Bragadeesh153 12:af1d7e18b868 31 rf_sl_timeout.attach(&FCTN_BCN_FEN, 30);
sakthipriya 0:7b4c00e3912f 32 Init_BEACON_HW();
sakthipriya 0:7b4c00e3912f 33 BCN_INIT_STATUS = 0;
sakthipriya 0:7b4c00e3912f 34 }
Bragadeesh153 12:af1d7e18b868 35 void FCTN_BCN_FEN()
sakthipriya 0:7b4c00e3912f 36 {
Bragadeesh153 12:af1d7e18b868 37 pc_bcn.printf("FCTN_FEN\n");
sakthipriya 0:7b4c00e3912f 38 BCN_FEN = 1;//write this value to flash
sakthipriya 0:7b4c00e3912f 39 }
Bragadeesh153 12:af1d7e18b868 40 void FCTN_BCN_TX_MAIN()
sakthipriya 0:7b4c00e3912f 41 {
Bragadeesh153 12:af1d7e18b868 42 pc_bcn.printf("FCTN_BCN_TX_MAIN\n");
Bragadeesh153 12:af1d7e18b868 43 t_i.start();
Bragadeesh153 12:af1d7e18b868 44 int begin = t_i.read_us();
sakthipriya 0:7b4c00e3912f 45 BCN_TX_MAIN_STATUS = 1;
sakthipriya 0:7b4c00e3912f 46
sakthipriya 0:7b4c00e3912f 47 if(BCN_FEN == 1)
sakthipriya 0:7b4c00e3912f 48 {
sakthipriya 0:7b4c00e3912f 49 if(BCN_TX_EN == 1)
sakthipriya 0:7b4c00e3912f 50 {
sakthipriya 0:7b4c00e3912f 51 //Measure and store BCN temperature in BCN_TS_BUFFER
sakthipriya 0:7b4c00e3912f 52 BCN_TS_BUFFER = check_Temperature();
sakthipriya 0:7b4c00e3912f 53 pc_bcn.printf("\n\ntemperature = %d\n\n",BCN_TS_BUFFER);
sakthipriya 0:7b4c00e3912f 54 //Get BCN_HK data from BCN HW(SPI) //Store BCN_HK data in BCN_HK_BUFFER
sakthipriya 0:7b4c00e3912f 55 if(BCN_STANDBY == 1 )
sakthipriya 0:7b4c00e3912f 56 {
sakthipriya 0:7b4c00e3912f 57 Set_BCN_TX_STATUS(BCN_TX_STANDBY);
sakthipriya 0:7b4c00e3912f 58 BCN_TX_MAIN_STATUS = 0;
sakthipriya 0:7b4c00e3912f 59
sakthipriya 0:7b4c00e3912f 60 // break;
sakthipriya 0:7b4c00e3912f 61 }
sakthipriya 0:7b4c00e3912f 62 else
sakthipriya 0:7b4c00e3912f 63 {
sakthipriya 0:7b4c00e3912f 64 //transmit short beacon and long beacon
Bragadeesh153 12:af1d7e18b868 65 //SHORT_BCN_TX();
sakthipriya 0:7b4c00e3912f 66 LONG_BCN_TX();
sakthipriya 0:7b4c00e3912f 67
sakthipriya 0:7b4c00e3912f 68 if(Check_ACK_RECEIVED() == 1)
sakthipriya 0:7b4c00e3912f 69 {
sakthipriya 0:7b4c00e3912f 70 Set_BCN_TX_STATUS(BCN_TX_SUCCESS);
sakthipriya 0:7b4c00e3912f 71 BCN_TX_MAIN_STATUS = 0;
sakthipriya 0:7b4c00e3912f 72 }
sakthipriya 0:7b4c00e3912f 73 else
sakthipriya 0:7b4c00e3912f 74 {
sakthipriya 0:7b4c00e3912f 75 Set_BCN_TX_STATUS(BCN_TX_FAILURE);
sakthipriya 0:7b4c00e3912f 76 BCN_TX_MAIN_STATUS = 0;
lakshya 11:1fdb94ae6563 77 BCN_FAIL_COUNT+=1;
sakthipriya 0:7b4c00e3912f 78
sakthipriya 0:7b4c00e3912f 79 }
sakthipriya 0:7b4c00e3912f 80 }
sakthipriya 0:7b4c00e3912f 81 }
sakthipriya 0:7b4c00e3912f 82 else
sakthipriya 0:7b4c00e3912f 83 {
sakthipriya 0:7b4c00e3912f 84 Set_BCN_TX_STATUS(BCN_TX_DISABLED);
sakthipriya 0:7b4c00e3912f 85 BCN_TX_MAIN_STATUS = 0;
sakthipriya 0:7b4c00e3912f 86 }
sakthipriya 0:7b4c00e3912f 87 }
sakthipriya 0:7b4c00e3912f 88 else
sakthipriya 0:7b4c00e3912f 89 {
sakthipriya 0:7b4c00e3912f 90 Set_BCN_TX_STATUS(BCN_RF_SILENCE); //Window of RF Silence: None of the Txs should be on.
sakthipriya 0:7b4c00e3912f 91 BCN_TX_MAIN_STATUS = 0;
sakthipriya 0:7b4c00e3912f 92 }
Bragadeesh153 12:af1d7e18b868 93 t_i.stop();
Bragadeesh153 12:af1d7e18b868 94 int end = t_i.read_us();
Bragadeesh153 12:af1d7e18b868 95 pc_bcn.printf("The time required for FCTN_BCN_TX_MAIN is %d useconds\r\n", end-begin);
Bragadeesh153 12:af1d7e18b868 96
sakthipriya 0:7b4c00e3912f 97 }
sakthipriya 0:7b4c00e3912f 98
sakthipriya 0:7b4c00e3912f 99 void Set_BCN_TX_STATUS(uint8_t STATUS)
sakthipriya 0:7b4c00e3912f 100 {
sakthipriya 0:7b4c00e3912f 101 BCN_TX_STATUS = STATUS;
sakthipriya 0:7b4c00e3912f 102 }
sakthipriya 0:7b4c00e3912f 103
sakthipriya 0:7b4c00e3912f 104 uint8_t check_Temperature()
sakthipriya 0:7b4c00e3912f 105 {
sakthipriya 0:7b4c00e3912f 106 uint8_t temperature;
Bragadeesh153 12:af1d7e18b868 107 writereg(RF22_REG_0F_ADC_CONFIGURATION,0x00);
sakthipriya 0:7b4c00e3912f 108 writereg(RF22_REG_12_Temperature_Sensor_Calibration,0x20);
Bragadeesh153 12:af1d7e18b868 109 writereg(RF22_REG_0F_ADC_CONFIGURATION,0x80);
Bragadeesh153 12:af1d7e18b868 110 wait(0.1);
sakthipriya 0:7b4c00e3912f 111 temperature = readreg(RF22_REG_11_ADC_Value);
sakthipriya 0:7b4c00e3912f 112 temperature = (float)temperature*0.5 - 64;
sakthipriya 0:7b4c00e3912f 113 return temperature;
sakthipriya 0:7b4c00e3912f 114 }
sakthipriya 0:7b4c00e3912f 115
sakthipriya 0:7b4c00e3912f 116 void SHORT_BCN_TX()
sakthipriya 0:7b4c00e3912f 117 {
sakthipriya 0:7b4c00e3912f 118 writereg(RF22_REG_6E_TX_DATA_RATE,0x01);
Bragadeesh153 12:af1d7e18b868 119 writereg(RF22_REG_6F_TX_DATA_RATE,0x50);//160bps
Bragadeesh153 12:af1d7e18b868 120 writereg(RF22_REG_3E_PACKET_LENGTH,SHORT_TX_DATA); //short packet length
Bragadeesh153 12:af1d7e18b868 121 wait(0.02);
Bragadeesh153 12:af1d7e18b868 122
Bragadeesh153 12:af1d7e18b868 123 uint32_t timeout_count = 10e5;
sakthipriya 0:7b4c00e3912f 124 //extract values from short_beacon[]
Bragadeesh153 12:af1d7e18b868 125
sakthipriya 0:7b4c00e3912f 126 struct Short_beacon
sakthipriya 0:7b4c00e3912f 127 {
sakthipriya 0:7b4c00e3912f 128 uint8_t Voltage[1];
sakthipriya 0:7b4c00e3912f 129 uint8_t AngularSpeed[2];
sakthipriya 0:7b4c00e3912f 130 uint8_t SubsystemStatus[1];
sakthipriya 0:7b4c00e3912f 131 uint8_t Temp[3];
sakthipriya 0:7b4c00e3912f 132 uint8_t ErrorFlag[1];
sakthipriya 0:7b4c00e3912f 133 }Shortbeacon = { {0x88}, {0x99, 0xAA} , {0xAA},{0xAA,0xDD,0xEE}, {0x00} };
sakthipriya 0:7b4c00e3912f 134
sakthipriya 0:7b4c00e3912f 135 //filling hk data
sakthipriya 0:7b4c00e3912f 136 //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]};
sakthipriya 0:7b4c00e3912f 137 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]};
Bragadeesh153 12:af1d7e18b868 138
sakthipriya 0:7b4c00e3912f 139 clearTxBuf();
sakthipriya 0:7b4c00e3912f 140 //writing data first time
sakthipriya 0:7b4c00e3912f 141 int byte = 0;
sakthipriya 0:7b4c00e3912f 142 cs = 0;
sakthipriya 0:7b4c00e3912f 143 spi.write(0xFF);
Bragadeesh153 12:af1d7e18b868 144
sakthipriya 0:7b4c00e3912f 145 for (int byte_counter = 0; byte_counter <15 ; byte_counter++)
sakthipriya 0:7b4c00e3912f 146 {
sakthipriya 0:7b4c00e3912f 147 for(int j = 3; j >= 0 ; j--)
sakthipriya 0:7b4c00e3912f 148 {
sakthipriya 0:7b4c00e3912f 149 if((short_beacon[byte_counter] & (uint8_t) pow(2.0,(j*2+1)))!= pow(2.0,(j*2+1)))
sakthipriya 0:7b4c00e3912f 150 {
sakthipriya 0:7b4c00e3912f 151 byte=0x00;
sakthipriya 0:7b4c00e3912f 152 }
sakthipriya 0:7b4c00e3912f 153 else
sakthipriya 0:7b4c00e3912f 154 {
sakthipriya 0:7b4c00e3912f 155 byte=0xF0;
sakthipriya 0:7b4c00e3912f 156 }
sakthipriya 0:7b4c00e3912f 157 if((short_beacon[byte_counter] & (uint8_t) pow(2.0,j*2))!= pow(2.0,j*2))
sakthipriya 0:7b4c00e3912f 158 {
sakthipriya 0:7b4c00e3912f 159 byte=byte | 0x00;
sakthipriya 0:7b4c00e3912f 160 }
sakthipriya 0:7b4c00e3912f 161 else
sakthipriya 0:7b4c00e3912f 162 {
sakthipriya 0:7b4c00e3912f 163 byte=byte | 0x0F;
sakthipriya 0:7b4c00e3912f 164 }
sakthipriya 0:7b4c00e3912f 165 spi.write(byte);
sakthipriya 0:7b4c00e3912f 166 }
sakthipriya 0:7b4c00e3912f 167 }
sakthipriya 0:7b4c00e3912f 168
sakthipriya 0:7b4c00e3912f 169 cs = 1;
Bragadeesh153 12:af1d7e18b868 170
sakthipriya 0:7b4c00e3912f 171 //Set to Tx mode
Bragadeesh153 12:af1d7e18b868 172 writereg(RF22_REG_07_OPERATING_MODE1,0x08);//*
Bragadeesh153 12:af1d7e18b868 173 wait(0.1);
sakthipriya 0:7b4c00e3912f 174 //Check for fifoThresh
Bragadeesh153 12:af1d7e18b868 175 while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x20) == 0x20)break;
Bragadeesh153 12:af1d7e18b868 176 timeout_count=10e5;
Bragadeesh153 12:af1d7e18b868 177
Bragadeesh153 12:af1d7e18b868 178 //Check for packet_sent
Bragadeesh153 12:af1d7e18b868 179 while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x04) == 0x04)break;
Bragadeesh153 12:af1d7e18b868 180
Bragadeesh153 12:af1d7e18b868 181 //pc_bcn.printf("Short packet sent\r\n");
sakthipriya 0:7b4c00e3912f 182
sakthipriya 0:7b4c00e3912f 183 writereg(RF22_REG_07_OPERATING_MODE1,0x00); //standby mode
sakthipriya 0:7b4c00e3912f 184
sakthipriya 0:7b4c00e3912f 185 }
sakthipriya 0:7b4c00e3912f 186 void LONG_BCN_TX()
sakthipriya 0:7b4c00e3912f 187 {
Bragadeesh153 12:af1d7e18b868 188 writereg(RF22_REG_6E_TX_DATA_RATE,0x08);
Bragadeesh153 12:af1d7e18b868 189 writereg(RF22_REG_6F_TX_DATA_RATE,0x31);//1000 bps
sakthipriya 0:7b4c00e3912f 190 writereg(RF22_REG_3E_PACKET_LENGTH,LONG_TX_DATA); //long packet length
sakthipriya 0:7b4c00e3912f 191 wait(0.02);
Bragadeesh153 12:af1d7e18b868 192 uint32_t timeout_count=10e5;
sakthipriya 0:7b4c00e3912f 193
sakthipriya 0:7b4c00e3912f 194 //get long_beacon array
sakthipriya 0:7b4c00e3912f 195
Bragadeesh153 12:af1d7e18b868 196 uint8_t Long_beacon[125];
Bragadeesh153 12:af1d7e18b868 197 for(int i = 0;i<125;)
sakthipriya 0:7b4c00e3912f 198 {
Bragadeesh153 12:af1d7e18b868 199 Long_beacon[i++] = 0xAA;
sakthipriya 0:7b4c00e3912f 200 }
sakthipriya 0:7b4c00e3912f 201
sakthipriya 0:7b4c00e3912f 202
sakthipriya 0:7b4c00e3912f 203
sakthipriya 0:7b4c00e3912f 204
sakthipriya 0:7b4c00e3912f 205 //setModeIdle();
sakthipriya 0:7b4c00e3912f 206 clearTxBuf();
sakthipriya 0:7b4c00e3912f 207 //writing data first time
sakthipriya 0:7b4c00e3912f 208 cs = 0;
sakthipriya 0:7b4c00e3912f 209 spi.write(0xFF);
sakthipriya 0:7b4c00e3912f 210 for(int i=0; i<60;i++)
sakthipriya 0:7b4c00e3912f 211 {
sakthipriya 0:7b4c00e3912f 212 spi.write(Long_beacon[i]);
sakthipriya 0:7b4c00e3912f 213 }
sakthipriya 0:7b4c00e3912f 214 cs = 1;
sakthipriya 0:7b4c00e3912f 215
sakthipriya 0:7b4c00e3912f 216 //Set to Tx mode
Bragadeesh153 12:af1d7e18b868 217 writereg(RF22_REG_07_OPERATING_MODE1,0x08);//*
Bragadeesh153 12:af1d7e18b868 218 wait(0.1);
Bragadeesh153 12:af1d7e18b868 219
sakthipriya 0:7b4c00e3912f 220 //Check for fifoThresh
Bragadeesh153 12:af1d7e18b868 221 while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x20) == 0x20)break;
Bragadeesh153 12:af1d7e18b868 222 timeout_count=10e5;
sakthipriya 0:7b4c00e3912f 223
sakthipriya 0:7b4c00e3912f 224 cs = 0;
sakthipriya 0:7b4c00e3912f 225 spi.write(0xFF);
Bragadeesh153 12:af1d7e18b868 226 for(int i=60; i<125;i++)
sakthipriya 0:7b4c00e3912f 227 {
sakthipriya 0:7b4c00e3912f 228 spi.write(Long_beacon[i]);
sakthipriya 0:7b4c00e3912f 229 }
sakthipriya 0:7b4c00e3912f 230 cs = 1;
Bragadeesh153 12:af1d7e18b868 231 wait(0.1);
sakthipriya 0:7b4c00e3912f 232 //Check for fifoThresh
Bragadeesh153 12:af1d7e18b868 233 while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x20) == 0x20)break;
Bragadeesh153 12:af1d7e18b868 234 timeout_count=10e5;
sakthipriya 0:7b4c00e3912f 235
sakthipriya 0:7b4c00e3912f 236 //Check for packetsent interrupt
Bragadeesh153 12:af1d7e18b868 237 while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x04) == 0x04)break;
sakthipriya 0:7b4c00e3912f 238
Bragadeesh153 12:af1d7e18b868 239 //pc_bcn.printf("Long packet sent\r\n");
sakthipriya 0:7b4c00e3912f 240
sakthipriya 0:7b4c00e3912f 241 writereg(RF22_REG_07_OPERATING_MODE1,0x00); //standby mode
sakthipriya 0:7b4c00e3912f 242 }
Bragadeesh153 12:af1d7e18b868 243 void reset_rfm()
sakthipriya 0:7b4c00e3912f 244 {
Bragadeesh153 12:af1d7e18b868 245 FCTN_BCN_INIT();
sakthipriya 0:7b4c00e3912f 246 }
sakthipriya 0:7b4c00e3912f 247 void writereg(uint8_t reg,uint8_t val)
sakthipriya 0:7b4c00e3912f 248 {
sakthipriya 0:7b4c00e3912f 249 uint8_t count = 0;
sakthipriya 0:7b4c00e3912f 250 for(;;count++)
sakthipriya 0:7b4c00e3912f 251 {
sakthipriya 0:7b4c00e3912f 252 int read_val =0; cs = 0;spi.write(reg | 0x80);spi.write(val);cs = 1;
sakthipriya 0:7b4c00e3912f 253 if(reg != 0x7 && reg != 0x58 && reg != 0xF)
sakthipriya 0:7b4c00e3912f 254 {
sakthipriya 0:7b4c00e3912f 255 read_val = readreg(reg);
sakthipriya 0:7b4c00e3912f 256 if (read_val == val)
sakthipriya 0:7b4c00e3912f 257 {
sakthipriya 0:7b4c00e3912f 258 break;
sakthipriya 0:7b4c00e3912f 259 }
sakthipriya 0:7b4c00e3912f 260 else if(count == 5)
sakthipriya 0:7b4c00e3912f 261 {
Bragadeesh153 12:af1d7e18b868 262 reset_rfm(), printf("reg = 0x%X\n",reg);break;
sakthipriya 0:7b4c00e3912f 263 }
sakthipriya 0:7b4c00e3912f 264 }
sakthipriya 0:7b4c00e3912f 265 else
sakthipriya 0:7b4c00e3912f 266 break;
sakthipriya 0:7b4c00e3912f 267 }
sakthipriya 0:7b4c00e3912f 268 }
sakthipriya 0:7b4c00e3912f 269 uint8_t readreg(uint8_t reg)
sakthipriya 0:7b4c00e3912f 270 {
sakthipriya 0:7b4c00e3912f 271 uint8_t val;cs = 0;spi.write(reg & ~0x80);val = spi.write(0);cs = 1;return val;
sakthipriya 0:7b4c00e3912f 272 }
sakthipriya 0:7b4c00e3912f 273 void clearTxBuf()
sakthipriya 0:7b4c00e3912f 274 {
sakthipriya 0:7b4c00e3912f 275 writereg(RF22_REG_08_OPERATING_MODE2,0x01);
sakthipriya 0:7b4c00e3912f 276 writereg(RF22_REG_08_OPERATING_MODE2,0x00);
sakthipriya 0:7b4c00e3912f 277 }
Bragadeesh153 12:af1d7e18b868 278 uint8_t setFrequency(double centre)
sakthipriya 0:7b4c00e3912f 279 {
sakthipriya 0:7b4c00e3912f 280 uint8_t fbsel = 0x40;
sakthipriya 0:7b4c00e3912f 281 if (centre >= 480.0) {
sakthipriya 0:7b4c00e3912f 282 centre /= 2;
sakthipriya 0:7b4c00e3912f 283 fbsel |= 0x20;
Bragadeesh153 12:af1d7e18b868 284 }
sakthipriya 0:7b4c00e3912f 285 centre /= 10.0;
sakthipriya 0:7b4c00e3912f 286 double integerPart = floor(centre);
sakthipriya 0:7b4c00e3912f 287 double fractionalPart = centre - integerPart;
sakthipriya 0:7b4c00e3912f 288
sakthipriya 0:7b4c00e3912f 289 uint8_t fb = (uint8_t)integerPart - 24; // Range 0 to 23
sakthipriya 0:7b4c00e3912f 290 fbsel |= fb;
sakthipriya 0:7b4c00e3912f 291 uint16_t fc = fractionalPart * 64000;
sakthipriya 0:7b4c00e3912f 292 writereg(RF22_REG_73_FREQUENCY_OFFSET1, 0); // REVISIT
sakthipriya 0:7b4c00e3912f 293 writereg(RF22_REG_74_FREQUENCY_OFFSET2, 0);
sakthipriya 0:7b4c00e3912f 294 writereg(RF22_REG_75_FREQUENCY_BAND_SELECT, fbsel);
sakthipriya 0:7b4c00e3912f 295 writereg(RF22_REG_76_NOMINAL_CARRIER_FREQUENCY1, fc >> 8);
sakthipriya 0:7b4c00e3912f 296 writereg(RF22_REG_77_NOMINAL_CARRIER_FREQUENCY0, fc & 0xff);
sakthipriya 0:7b4c00e3912f 297 return 0;
sakthipriya 0:7b4c00e3912f 298 }
sakthipriya 0:7b4c00e3912f 299
sakthipriya 0:7b4c00e3912f 300
sakthipriya 0:7b4c00e3912f 301 void Init_BEACON_HW()
sakthipriya 0:7b4c00e3912f 302 {
Bragadeesh153 12:af1d7e18b868 303 wait(0.1);
sakthipriya 0:7b4c00e3912f 304 cs=1; // chip must be deselected
Bragadeesh153 12:af1d7e18b868 305 wait(0.1);
sakthipriya 0:7b4c00e3912f 306 spi.format(8,0);
sakthipriya 0:7b4c00e3912f 307 spi.frequency(10000000); //10MHz SCLK
sakthipriya 0:7b4c00e3912f 308
sakthipriya 0:7b4c00e3912f 309 //should either have a flag for invalid SPI or discard this for actual case or add reset
sakthipriya 0:7b4c00e3912f 310 if (readreg(RF22_REG_00_DEVICE_TYPE) == 0x08)
sakthipriya 0:7b4c00e3912f 311 pc_bcn.printf("spi connection valid\r\n");
sakthipriya 0:7b4c00e3912f 312 else
sakthipriya 0:7b4c00e3912f 313 {pc_bcn.printf("error in spi connection\r\n");
Bragadeesh153 12:af1d7e18b868 314 reset_rfm();
sakthipriya 0:7b4c00e3912f 315 }
sakthipriya 0:7b4c00e3912f 316
sakthipriya 0:7b4c00e3912f 317 writereg(RF22_REG_07_OPERATING_MODE1,0x80); //sw_reset
Bragadeesh153 12:af1d7e18b868 318 wait(0.1); //takes time to reset
sakthipriya 0:7b4c00e3912f 319
sakthipriya 0:7b4c00e3912f 320 clearTxBuf();
sakthipriya 0:7b4c00e3912f 321
sakthipriya 0:7b4c00e3912f 322 writereg(RF22_REG_07_OPERATING_MODE1,0x00); //standby mode
sakthipriya 0:7b4c00e3912f 323
sakthipriya 0:7b4c00e3912f 324 //txfifoalmostempty
sakthipriya 0:7b4c00e3912f 325 writereg(RF22_REG_7D_TX_FIFO_CONTROL2,30);
sakthipriya 0:7b4c00e3912f 326
sakthipriya 0:7b4c00e3912f 327 //Packet-engine registers
sakthipriya 0:7b4c00e3912f 328 writereg(RF22_REG_30_DATA_ACCESS_CONTROL,0x00);
sakthipriya 0:7b4c00e3912f 329
sakthipriya 0:7b4c00e3912f 330 writereg(RF22_REG_33_HEADER_CONTROL2,0x08);
sakthipriya 0:7b4c00e3912f 331 writereg(RF22_REG_34_PREAMBLE_LENGTH,0x00);
sakthipriya 0:7b4c00e3912f 332
sakthipriya 0:7b4c00e3912f 333 writereg(RF22_REG_0B_GPIO_CONFIGURATION0,0x15); // TX state
sakthipriya 0:7b4c00e3912f 334 writereg(RF22_REG_0C_GPIO_CONFIGURATION1,0x12); // RX state
sakthipriya 0:7b4c00e3912f 335
Bragadeesh153 12:af1d7e18b868 336 setFrequency(435.0);
sakthipriya 0:7b4c00e3912f 337
sakthipriya 0:7b4c00e3912f 338 if((readreg(RF22_REG_02_DEVICE_STATUS)& 0x08)!= 0x00)
sakthipriya 0:7b4c00e3912f 339 {
Bragadeesh153 12:af1d7e18b868 340 pc_bcn.printf("frequency not set properly\r\n");
Bragadeesh153 12:af1d7e18b868 341 reset_rfm();
sakthipriya 0:7b4c00e3912f 342 }
sakthipriya 0:7b4c00e3912f 343
sakthipriya 0:7b4c00e3912f 344 //set Modem Configuration
Bragadeesh153 12:af1d7e18b868 345 //writereg(RF22_REG_1C_IF_FILTER_BANDWIDTH,0xdf);
Bragadeesh153 12:af1d7e18b868 346 //writereg(RF22_REG_1F_CLOCK_RECOVERY_GEARSHIFT_OVERRIDE,0x03);
Bragadeesh153 12:af1d7e18b868 347 //writereg(RF22_REG_20_CLOCK_RECOVERY_OVERSAMPLING_RATE,0x39);
Bragadeesh153 12:af1d7e18b868 348 //writereg(RF22_REG_21_CLOCK_RECOVERY_OFFSET2,0x20);
Bragadeesh153 12:af1d7e18b868 349 //writereg(RF22_REG_22_CLOCK_RECOVERY_OFFSET1,0x68); //updated 20 to 25 reg values from excel sheet for 1.2 Khz freq. deviation,fsk
Bragadeesh153 12:af1d7e18b868 350 //writereg(RF22_REG_23_CLOCK_RECOVERY_OFFSET0,0xdc);
Bragadeesh153 12:af1d7e18b868 351 //writereg(RF22_REG_24_CLOCK_RECOVERY_TIMING_LOOP_GAIN1,0x00);
Bragadeesh153 12:af1d7e18b868 352 //writereg(RF22_REG_25_CLOCK_RECOVERY_TIMING_LOOP_GAIN0,0x6B);
Bragadeesh153 12:af1d7e18b868 353 //writereg(RF22_REG_2C_OOK_COUNTER_VALUE_1,0x2C);
Bragadeesh153 12:af1d7e18b868 354 //writereg(RF22_REG_2D_OOK_COUNTER_VALUE_2,0x11); //not required for fsk (OOK counter value)
Bragadeesh153 12:af1d7e18b868 355 //writereg(RF22_REG_2E_SLICER_PEAK_HOLD,0x2A); //??
sakthipriya 0:7b4c00e3912f 356 writereg(RF22_REG_58,0x80);
Bragadeesh153 12:af1d7e18b868 357 //writereg(RF22_REG_69_AGC_OVERRIDE1,0x60);
sakthipriya 0:7b4c00e3912f 358
sakthipriya 0:7b4c00e3912f 359 //Data rate set later
sakthipriya 0:7b4c00e3912f 360
sakthipriya 0:7b4c00e3912f 361 writereg(RF22_REG_70_MODULATION_CONTROL1,0x20);
sakthipriya 0:7b4c00e3912f 362 writereg(RF22_REG_71_MODULATION_CONTROL2,0x21);//ook = 0x21
sakthipriya 0:7b4c00e3912f 363
sakthipriya 0:7b4c00e3912f 364 //set tx power
sakthipriya 0:7b4c00e3912f 365 writereg(RF22_REG_6D_TX_POWER,0x07); //20dbm
sakthipriya 0:7b4c00e3912f 366
sakthipriya 0:7b4c00e3912f 367 //TX_packet_length written later
sakthipriya 0:7b4c00e3912f 368 }
sakthipriya 0:7b4c00e3912f 369 bool Check_ACK_RECEIVED()
sakthipriya 0:7b4c00e3912f 370 {
sakthipriya 0:7b4c00e3912f 371 if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x04) == 0x04)
sakthipriya 0:7b4c00e3912f 372 {
sakthipriya 0:7b4c00e3912f 373 printf("Packet sent: ACK received\r\n");
sakthipriya 0:7b4c00e3912f 374 return 1;
sakthipriya 0:7b4c00e3912f 375 }
sakthipriya 0:7b4c00e3912f 376 else
sakthipriya 0:7b4c00e3912f 377 {
sakthipriya 0:7b4c00e3912f 378 pc_bcn.printf("Packet not sent\r\n");
sakthipriya 0:7b4c00e3912f 379 return 0;
sakthipriya 0:7b4c00e3912f 380 }
sakthipriya 0:7b4c00e3912f 381 }