bcn code modification for new short bcn format
Fork of BEACON_CODE by
BCN.cpp
00001 #include "BCN.h" 00002 #include <stdio.h> 00003 #include "pin_config.h" 00004 //Check the pin names 00005 //Takes max 4.3 sec in void FCTN_BCN_TX_MAIN() (temp.calc. + long_beacon + short_beacon) 00006 00007 Serial pc_bcn(USBTX, USBRX); //tx,rx 00008 SPI spi(D11, D12, D13); // mosi, miso, sclk 00009 DigitalOut cs(D10); //slave select or chip select 00010 //SPI spi(PIN16, PIN17, PIN15); // mosi, miso, sclk 00011 //DigitalOut cs(PIN6); //slave select or chip select 00012 Timer t_i;//timer for checking the time taken by (temp.calc. + long_beacon + short_beacon) 00013 //Timer t_is;//timer for short_beacon 00014 //Timer t_il;//timer for long_beacon 00015 Timeout rf_sl_timeout;//RF_silence timer 00016 Ticker loop;//for transmitting every 10 secs 00017 00018 //GLOBAL VARIABLES 00019 uint8_t BCN_INIT_STATUS = 0; 00020 uint8_t BCN_TX_MAIN_STATUS = 0; 00021 uint8_t BCN_TX_STATUS = 0; 00022 uint8_t BCN_TX_EN = 1; //hardcoding for now //check where is this variable toggled?? 00023 uint8_t BCN_FEN = 0; //hardcoding for now //write this value to flash 00024 uint8_t BCN_STANDBY = 0; //hardcoding for now //check where is this variable toggled?? 00025 uint8_t BCN_TS_BUFFER = 0; // For Temperature 00026 uint8_t ERROR_CHECK = 0; 00027 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) 00028 //This Flag when exceeds a threshold, uC should reset. 00029 void FCTN_BCN_INIT() 00030 { 00031 pc_bcn.printf("FCTN_BCN_INIT\n"); 00032 Init_BEACON_HW(); 00033 BCN_INIT_STATUS = 1; 00034 if(BCN_FEN == 0)//BCN_FEN is in flash 00035 rf_sl_timeout.attach(&FCTN_BCN_FEN, RF_SILENCE_TIME); 00036 BCN_INIT_STATUS = 0; 00037 } 00038 void FCTN_BCN_FEN() 00039 { 00040 pc_bcn.printf("FCTN_FEN\n"); 00041 BCN_FEN = 1;//write this value to flash 00042 } 00043 void FCTN_BCN_TX_MAIN() 00044 { 00045 ERROR_CHECK=0; 00046 pc_bcn.printf("FCTN_BCN_TX_MAIN\n"); 00047 t_i.start(); 00048 int begin = t_i.read_us(); 00049 int begins,beginl,ends,endl; 00050 BCN_TX_MAIN_STATUS = 1; 00051 00052 if(BCN_FEN == 1) 00053 { 00054 if(BCN_TX_EN == 1) 00055 { 00056 //Measure and store BCN temperature in BCN_TS_BUFFER 00057 BCN_TS_BUFFER = check_Temperature(); 00058 pc_bcn.printf("\n\ntemperature = %d\n\n",BCN_TS_BUFFER); 00059 //Get BCN_HK data from BCN HW(SPI) //Store BCN_HK data in BCN_HK_BUFFER 00060 if(BCN_STANDBY == 1 ) 00061 { 00062 Set_BCN_TX_STATUS(BCN_TX_STANDBY); 00063 BCN_TX_MAIN_STATUS = 0; 00064 00065 // break; 00066 } 00067 else 00068 { 00069 //transmit short beacon and long beacon 00070 //t_is.start(); 00071 begins = t_i.read_us(); 00072 SHORT_BCN_TX(); 00073 //t_is.stop(); 00074 ends = t_i.read_us(); 00075 00076 //t_il.start(); 00077 beginl = t_i.read_us(); 00078 LONG_BCN_TX(); 00079 //t_il.stop(); 00080 endl = t_i.read_us(); 00081 00082 if(Check_ACK_RECEIVED() == 1) 00083 { 00084 Set_BCN_TX_STATUS(BCN_TX_SUCCESS); 00085 BCN_TX_MAIN_STATUS = 0; 00086 } 00087 else 00088 { 00089 Set_BCN_TX_STATUS(BCN_TX_FAILURE); 00090 BCN_TX_MAIN_STATUS = 0; 00091 00092 } 00093 } 00094 } 00095 else 00096 { 00097 Set_BCN_TX_STATUS(BCN_TX_DISABLED); 00098 BCN_TX_MAIN_STATUS = 0; 00099 } 00100 } 00101 else 00102 { 00103 Set_BCN_TX_STATUS(BCN_RF_SILENCE); //Window of RF Silence: None of the Txs should be on. 00104 BCN_TX_MAIN_STATUS = 0; 00105 } 00106 t_i.stop(); 00107 int end = t_i.read_us(); 00108 pc_bcn.printf("The time required for FCTN_BCN_TX_MAIN is %d useconds\r\n", end-begin); 00109 pc_bcn.printf("The time required for Short_BCN is %d useconds\r\n", ends-begins); 00110 pc_bcn.printf("The time required for Long_BCN is %d useconds\r\n", endl-beginl); 00111 ERROR_CHECK = 0; 00112 00113 } 00114 00115 void Set_BCN_TX_STATUS(uint8_t STATUS) 00116 { 00117 BCN_TX_STATUS = STATUS; 00118 } 00119 00120 uint8_t check_Temperature() 00121 { 00122 uint8_t temperature; 00123 writereg(RF22_REG_0F_ADC_CONFIGURATION,0x00);//set ADC to temp measurement 00124 writereg(RF22_REG_12_Temperature_Sensor_Calibration,0x20);//measure in degree celsius 00125 writereg(RF22_REG_0F_ADC_CONFIGURATION,0x80);//start adc 00126 wait(0.1); 00127 temperature = readreg(RF22_REG_11_ADC_Value); 00128 temperature = (float)temperature*0.5 - 64; 00129 return temperature; 00130 } 00131 00132 void SHORT_BCN_TX() 00133 { 00134 /* 00135 writereg(RF22_REG_6E_TX_DATA_RATE,0x01); 00136 writereg(RF22_REG_6F_TX_DATA_RATE,0x50);//160bps 00137 */ 00138 writereg(RF22_REG_6E_TX_DATA_RATE,0x0A); 00139 writereg(RF22_REG_6F_TX_DATA_RATE,0x7D);//1280bps 00140 00141 writereg(RF22_REG_3E_PACKET_LENGTH,SHORT_TX_DATA); //short packet length 00142 wait(0.02); 00143 00144 uint32_t timeout_count = 10e5; 00145 //extract values from short_beacon[] 00146 00147 struct Short_beacon 00148 { 00149 uint8_t Voltage[1]; 00150 uint8_t AngularSpeed[2]; 00151 uint8_t SubsystemStatus[1]; 00152 uint8_t Temp[3]; 00153 uint8_t ErrorFlag[1]; 00154 }Shortbeacon = { {0x88}, {0x99, 0xAA} , {0xAA},{0xAA,0xDD,0xEE}, {0x00} }; 00155 00156 //filling hk data 00157 //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]}; 00158 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]}; 00159 00160 //writereg(RF22_REG_07_OPERATING_MODE1,0x01); //ready mode ?? 00161 clearTxBuf(); //writing data first time 00162 00163 int byte = 0,byte_count=0; 00164 //int spi_start,spi_end,spi_total=0; 00165 for (int byte_counter = 0; byte_counter <15 ; byte_counter++) 00166 { 00167 //pc_bcn.printf("byte-counter=%d\r\n", byte_counter); 00168 /* 00169 for(int j = 3; j >= 0 ; j--) 00170 { 00171 if((short_beacon[byte_counter] & (uint8_t) pow(2.0,(j*2+1)))!= pow(2.0,(j*2+1))) 00172 { 00173 byte=0x00; 00174 } 00175 else 00176 { 00177 byte=0xF0; 00178 } 00179 if((short_beacon[byte_counter] & (uint8_t) pow(2.0,j*2))!= pow(2.0,j*2)) 00180 { 00181 byte=byte | 0x00; 00182 } 00183 else 00184 { 00185 byte=byte | 0x0F; 00186 } 00187 cs = 0; 00188 spi.write(0xFF); 00189 spi.write(byte); 00190 cs = 1; 00191 } 00192 */ 00193 for(int j = 7; j >= 0 ; j--) 00194 { 00195 //spi_start = t_i.read_us(); 00196 if((short_beacon[byte_counter] & (uint8_t) pow(2.0,j))!= pow(2.0,j)) 00197 { 00198 byte=0x00; 00199 } 00200 else 00201 { 00202 byte=0xFF; 00203 } 00204 00205 cs = 0; 00206 spi.write(0xFF); 00207 spi.write(byte); 00208 spi.write(byte); 00209 spi.write(byte); 00210 spi.write(byte); //Each bit is written 32 times 00211 byte_count+=4; 00212 cs = 1; 00213 00214 //spi_end = t_i.read_us(); 00215 //spi_total += spi_end-spi_start; 00216 //pc_bcn.printf("Time taken to write one byte = %d\r\n",spi_end-spi_start); 00217 } 00218 00219 if(byte_counter % 2 == 1) 00220 { 00221 00222 //Set to Tx mode 00223 writereg(RF22_REG_07_OPERATING_MODE1,0x08); //txon 00224 wait(0.1);// takes time to set to tx mode hence the delay of 0.1. 00225 00226 //Check for fifoThresh 00227 while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x20) == 0x20)break;else if(timeout_count == 1) 00228 { 00229 pc_bcn.printf("Reset\n"); 00230 reset_rfm(1);} 00231 timeout_count=10e5; 00232 00233 } 00234 00235 } 00236 00237 //Set to Tx mode 00238 writereg(RF22_REG_07_OPERATING_MODE1,0x08); //txon 00239 wait(0.1);// takes time to set to tx mode hence the delay of 0.1. 00240 00241 //Check for fifoThresh 00242 while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x20) == 0x20)break;else if(timeout_count == 1) 00243 { 00244 pc_bcn.printf("Reset\n"); 00245 reset_rfm(1);} 00246 timeout_count=10e5; 00247 00248 //Check for packetsent interrupt 00249 while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x04) == 0x04)break;else if(timeout_count == 1) reset_rfm(1); 00250 00251 pc_bcn.printf("Short packet sent, bytes = %d\r\n",byte_count); 00252 00253 writereg(RF22_REG_07_OPERATING_MODE1,0x00); //standby mode 00254 00255 } 00256 void LONG_BCN_TX() 00257 { 00258 /* 00259 writereg(RF22_REG_6E_TX_DATA_RATE,0x04); 00260 writereg(RF22_REG_6F_TX_DATA_RATE,0xEA);//600 bps 00261 */ 00262 writereg(RF22_REG_3E_PACKET_LENGTH,LONG_TX_DATA); //long packet length 00263 wait(0.02); 00264 uint32_t timeout_count=10e5; 00265 00266 //get long_beacon array 00267 00268 uint8_t Long_beacon[LONG_TX_DATA]; 00269 for(int i = 0;i<LONG_TX_DATA;i++) 00270 { 00271 Long_beacon[i] = 0xA0; 00272 } 00273 00274 clearTxBuf(); 00275 //writing data first time 00276 cs = 0; 00277 spi.write(0xFF); 00278 for(int i=0; i<64;i++) 00279 { 00280 spi.write(Long_beacon[i]); 00281 } 00282 cs = 1; 00283 00284 //Set to Tx mode 00285 writereg(RF22_REG_07_OPERATING_MODE1,0x08); 00286 wait(0.1);//necessary 00287 00288 //Check for fifoThresh 00289 while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x20) == 0x20)break;else if(timeout_count == 1) 00290 { 00291 pc_bcn.printf("Reset\n"); 00292 reset_rfm(1);} 00293 timeout_count=10e5; 00294 00295 cs = 0; 00296 spi.write(0xFF); 00297 for(int i=64; i<127;i++) 00298 { 00299 spi.write(Long_beacon[i]); 00300 } 00301 cs = 1; 00302 wait(0.1); 00303 //Check for fifoThresh 00304 while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x20) == 0x20)break;else if(timeout_count == 1) 00305 { 00306 pc_bcn.printf("Reset\n"); 00307 reset_rfm(1);} 00308 timeout_count=10e5; 00309 00310 //Check for packetsent interrupt 00311 while(timeout_count--)if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x04) == 0x04)break;else if(timeout_count == 1) reset_rfm(1); 00312 00313 //pc_bcn.printf("Long packet sent\r\n"); 00314 00315 writereg(RF22_REG_07_OPERATING_MODE1,0x00); //standby mode 00316 } 00317 void reset_rfm(uint8_t fl) 00318 { 00319 if (fl ==1 && ERROR_CHECK ==0) 00320 {BCN_FAIL_COUNT++; 00321 ERROR_CHECK=1; 00322 printf("BCN_FAIL_COUNT++\n");} 00323 else if(fl == 0) 00324 {BCN_FAIL_COUNT = 0; 00325 ERROR_CHECK=0;} 00326 } 00327 void writereg(uint8_t reg,uint8_t val) 00328 { 00329 00330 uint8_t count = 0; 00331 for(;;count++) 00332 { 00333 int read_val =0; cs = 0;spi.write(reg | 0x80);spi.write(val);cs = 1; 00334 if(reg != 0x7 && reg != 0x58 && reg != 0xF) 00335 { 00336 read_val = readreg(reg); 00337 if (read_val == val) 00338 { 00339 break; 00340 } 00341 else if(count == 5) 00342 { 00343 reset_rfm(1); printf("reg = 0x%X\n",reg);break; 00344 } 00345 else init_spi(); 00346 } 00347 else 00348 break; 00349 } 00350 } 00351 uint8_t readreg(uint8_t reg) 00352 { 00353 uint8_t val;cs = 0;spi.write(reg & ~0x80);val = spi.write(0);cs = 1;return val; 00354 } 00355 void clearTxBuf() 00356 { 00357 writereg(RF22_REG_08_OPERATING_MODE2,0x01); 00358 writereg(RF22_REG_08_OPERATING_MODE2,0x00); 00359 } 00360 uint8_t setFrequency(double centre) 00361 { 00362 uint8_t fbsel = 0x40; 00363 if (centre >= 480.0) { 00364 centre /= 2; 00365 fbsel |= 0x20; 00366 } 00367 centre /= 10.0; 00368 double integerPart = floor(centre); 00369 double fractionalPart = centre - integerPart; 00370 00371 uint8_t fb = (uint8_t)integerPart - 24; // Range 0 to 23 00372 fbsel |= fb; 00373 uint16_t fc = fractionalPart * 64000; 00374 writereg(RF22_REG_73_FREQUENCY_OFFSET1, 0); // REVISIT 00375 writereg(RF22_REG_74_FREQUENCY_OFFSET2, 0); 00376 writereg(RF22_REG_75_FREQUENCY_BAND_SELECT, fbsel); 00377 writereg(RF22_REG_76_NOMINAL_CARRIER_FREQUENCY1, fc >> 8); 00378 writereg(RF22_REG_77_NOMINAL_CARRIER_FREQUENCY0, fc & 0xff); 00379 return 0; 00380 } 00381 void init_spi() 00382 { 00383 cs=1; // chip must be deselected 00384 wait(0.1); 00385 spi.format(8,0); 00386 spi.frequency(10000000); //10MHz SCLK 00387 } 00388 void Init_BEACON_HW() 00389 { 00390 ERROR_CHECK=0; 00391 wait(0.1); 00392 int i = 5; 00393 while(i--) 00394 { 00395 init_spi(); 00396 00397 //should either have a flag for invalid SPI or discard this for actual case or add reset 00398 if (readreg(RF22_REG_00_DEVICE_TYPE) == 0x08) 00399 {pc_bcn.printf("spi connection valid\r\n"); 00400 reset_rfm(0);break;} 00401 else if (i == 1) 00402 {pc_bcn.printf("error in spi connection\r\n"); 00403 reset_rfm(1); 00404 return; 00405 } 00406 } 00407 00408 writereg(RF22_REG_07_OPERATING_MODE1,0x80); //sw_reset 00409 wait(0.1); //takes time to reset 00410 00411 clearTxBuf(); 00412 00413 writereg(RF22_REG_07_OPERATING_MODE1,0x00); //standby mode 00414 00415 //txfifoalmostempty 00416 writereg(RF22_REG_7D_TX_FIFO_CONTROL2,30); 00417 00418 //Packet-engine registers 00419 writereg(RF22_REG_30_DATA_ACCESS_CONTROL,0x00); 00420 00421 writereg(RF22_REG_33_HEADER_CONTROL2,0x08); 00422 writereg(RF22_REG_34_PREAMBLE_LENGTH,0x00); 00423 00424 writereg(RF22_REG_0B_GPIO_CONFIGURATION0,0x15); // TX state 00425 writereg(RF22_REG_0C_GPIO_CONFIGURATION1,0x12); // RX state 00426 00427 setFrequency(435.0); 00428 00429 i=3; 00430 while(i--) 00431 if((readreg(RF22_REG_02_DEVICE_STATUS)& 0x08)!= 0x00) 00432 { 00433 setFrequency(435.0); 00434 if (i==1) 00435 {pc_bcn.printf("frequency not set properly\r\n"); 00436 reset_rfm(1);} 00437 } 00438 00439 //set Modem Configuration 00440 writereg(RF22_REG_58,0x80); 00441 00442 //Set Data rate - same for both long and short beacon 00443 00444 writereg(RF22_REG_6E_TX_DATA_RATE,0x0A); 00445 writereg(RF22_REG_6F_TX_DATA_RATE,0x7D);//1280bps 00446 00447 00448 writereg(RF22_REG_70_MODULATION_CONTROL1,0x20); 00449 writereg(RF22_REG_71_MODULATION_CONTROL2,0x21);//ook = 0x21 00450 00451 //set tx power 00452 writereg(RF22_REG_6D_TX_POWER,0x07); //20dbm 00453 00454 //TX_packet_length written later 00455 ERROR_CHECK = 0; 00456 } 00457 bool Check_ACK_RECEIVED() 00458 { 00459 if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x04) == 0x04) 00460 { 00461 printf("Packet sent: ACK received\r\n"); 00462 return 1; 00463 } 00464 else 00465 { 00466 pc_bcn.printf("Packet not sent\r\n"); 00467 return 0; 00468 } 00469 } 00470 int main() 00471 { 00472 FCTN_BCN_INIT(); 00473 00474 loop.attach(&FCTN_BCN_TX_MAIN, 10.0);//in actual case its 30.0 00475 00476 while(1); 00477 00478 }
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