FINAL rfm22 code for BAE
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beacon.cpp
00001 #include "beacon.h" 00002 #include "HK.h" 00003 Serial chavan(USBTX, USBRX); // tx, rx 00004 SPI spi(PTD6,PTD7,PTD5); // mosi, miso, sclk 00005 DigitalOut cs(PTC11); //slave select or chip select 00006 00007 extern ShortBeacy Shortbeacon; 00008 00009 void writereg(uint8_t reg,uint8_t val) 00010 { 00011 cs = 0;__disable_irq();spi.write(reg | 0x80);spi.write(val);__enable_irq();cs = 1; 00012 } 00013 uint8_t readreg(uint8_t reg) 00014 { 00015 int val;cs = 0;__disable_irq();spi.write(reg & ~0x80);val = spi.write(0);__enable_irq();cs = 1;return val; 00016 } 00017 void clearTxBuf() 00018 { 00019 writereg(RF22_REG_08_OPERATING_MODE2,0x01); 00020 writereg(RF22_REG_08_OPERATING_MODE2,0x00); 00021 } 00022 void clearRxBuf() 00023 { 00024 writereg(RF22_REG_08_OPERATING_MODE2,0x02); 00025 writereg(RF22_REG_08_OPERATING_MODE2,0x00); 00026 } 00027 int setFrequency(float centre,float afcPullInRange) 00028 { 00029 //freq setting begins 00030 uint8_t fbsel = 0x40; 00031 uint8_t afclimiter; 00032 if (centre >= 480.0) { 00033 centre /= 2; 00034 fbsel |= 0x20; 00035 afclimiter = afcPullInRange * 1000000.0 / 1250.0; 00036 } else { 00037 if (afcPullInRange < 0.0 || afcPullInRange > 0.159375) 00038 return false; 00039 afclimiter = afcPullInRange * 1000000.0 / 625.0; 00040 } 00041 centre /= 10.0; 00042 float integerPart = floor(centre); 00043 float fractionalPart = centre - integerPart; 00044 00045 uint8_t fb = (uint8_t)integerPart - 24; // Range 0 to 23 00046 fbsel |= fb; 00047 uint16_t fc = fractionalPart * 64000; 00048 writereg(RF22_REG_73_FREQUENCY_OFFSET1, 0); // REVISIT 00049 writereg(RF22_REG_74_FREQUENCY_OFFSET2, 0); 00050 writereg(RF22_REG_75_FREQUENCY_BAND_SELECT, fbsel); 00051 writereg(RF22_REG_76_NOMINAL_CARRIER_FREQUENCY1, fc >> 8); 00052 writereg(RF22_REG_77_NOMINAL_CARRIER_FREQUENCY0, fc & 0xff); 00053 writereg(RF22_REG_2A_AFC_LIMITER, afclimiter); 00054 return 0; 00055 } 00056 00057 void init() 00058 { 00059 //reset() 00060 writereg(RF22_REG_07_OPERATING_MODE1,0x80); //sw_reset 00061 wait(1); //takes time to reset 00062 00063 clearTxBuf(); 00064 clearRxBuf(); 00065 //txfifoalmostempty 00066 writereg(RF22_REG_7D_TX_FIFO_CONTROL2,5); 00067 //rxfifoalmostfull 00068 writereg(RF22_REG_7E_RX_FIFO_CONTROL,20); 00069 //Packet-engine registers 00070 writereg(RF22_REG_30_DATA_ACCESS_CONTROL,0x8E); //RF22_REG_30_DATA_ACCESS_CONTROL, RF22_ENPACRX | RF22_ENPACTX | RF22_ENCRC | RF22_CRC_CRC_16_IBM 00071 //&0x77 = diasable packet rx-tx handling 00072 writereg(RF22_REG_32_HEADER_CONTROL1,0x88); //RF22_REG_32_HEADER_CONTROL1, RF22_BCEN_HEADER3 | RF22_HDCH_HEADER3 00073 writereg(RF22_REG_33_HEADER_CONTROL2,0x42); //RF22_REG_33_HEADER_CONTROL2, RF22_HDLEN_4 | RF22_SYNCLEN_2 00074 writereg(RF22_REG_34_PREAMBLE_LENGTH,8); //RF22_REG_34_PREAMBLE_LENGTH, nibbles); preamble length = 8; 00075 writereg(RF22_REG_36_SYNC_WORD3,0x2D); //syncword3=2D 00076 writereg(RF22_REG_37_SYNC_WORD2,0xD4); //syncword2=D4 00077 writereg(RF22_REG_3F_CHECK_HEADER3,0); //RF22_REG_3F_CHECK_HEADER3, RF22_DEFAULT_NODE_ADDRESS 00078 writereg(RF22_REG_3A_TRANSMIT_HEADER3,0xab); //header_to 00079 writereg(RF22_REG_3B_TRANSMIT_HEADER2,0xbc); //header_from 00080 writereg(RF22_REG_3C_TRANSMIT_HEADER1,0xcd); //header_ids 00081 writereg(RF22_REG_3D_TRANSMIT_HEADER0,0xde); //header_flags 00082 writereg(RF22_REG_3F_CHECK_HEADER3,0xab); 00083 writereg(RF22_REG_40_CHECK_HEADER2,0xbc); 00084 writereg(RF22_REG_41_CHECK_HEADER1,0xcd); 00085 writereg(RF22_REG_42_CHECK_HEADER0,0xde); 00086 00087 //RSSI threshold for clear channel indicator 00088 writereg(RF22_REG_27_RSSI_THRESHOLD,0xA5); //55 for -80dBm, 2D for -100dBm, 7D for -60dBm, A5 for -40dBm, CD for -20 dBm 00089 00090 writereg(RF22_REG_0B_GPIO_CONFIGURATION0,0x15); // TX state ?? 00091 writereg(RF22_REG_0C_GPIO_CONFIGURATION1,0x12); // RX state ?? 00092 00093 //interrupts 00094 // spiWrite(RF22_REG_05_INTERRUPT_ENABLE1, RF22_ENTXFFAEM |RF22_ENRXFFAFULL | RF22_ENPKSENT |RF22_ENPKVALID| RF22_ENCRCERROR); 00095 // spiWrite(RF22_REG_06_INTERRUPT_ENABLE2, RF22_ENPREAVAL); 00096 00097 setFrequency(435.0, 0.05); 00098 00099 //return !(statusRead() & RF22_FREQERR); 00100 if((readreg(RF22_REG_02_DEVICE_STATUS)& 0x08)!= 0x00) 00101 pc.printf("frequency not set properly\n"); 00102 //frequency set 00103 00104 //setModemConfig(FSK_Rb2_4Fd36); FSK_Rb2_4Fd36, ///< FSK, No Manchester, Rb = 2.4kbs, Fd = 36kHz 00105 //setmodemregisters 00106 //0x1b, 0x03, 0x41, 0x60, 0x27, 0x52, 0x00, 0x07, 0x40, 0x0a, 0x1e, 0x80, 0x60, 0x13, 0xa9, 0x2c, 0x22, 0x3a = FSK_RB2_4FD36 00107 //0xc8, 0x03, 0x39, 0x20, 0x68, 0xdc, 0x00, 0x6b, 0x2a, 0x08, 0x2a, 0x80, 0x60, 0x13, 0xa9, 0x2c, 0x21, 0x08 = OOK,2.4, 335 00108 writereg(RF22_REG_1C_IF_FILTER_BANDWIDTH,0x2B); 00109 writereg(RF22_REG_1F_CLOCK_RECOVERY_GEARSHIFT_OVERRIDE,0x03); 00110 writereg(RF22_REG_20_CLOCK_RECOVERY_OVERSAMPLING_RATE,0x41); 00111 writereg(RF22_REG_21_CLOCK_RECOVERY_OFFSET2,0x60); 00112 writereg(RF22_REG_22_CLOCK_RECOVERY_OFFSET1,0x27); //updated 20 to 25 reg values from excel sheet for 1.2 Khz freq. deviation,fsk 00113 writereg(RF22_REG_23_CLOCK_RECOVERY_OFFSET0,0x52); 00114 writereg(RF22_REG_24_CLOCK_RECOVERY_TIMING_LOOP_GAIN1,0x00); 00115 writereg(RF22_REG_25_CLOCK_RECOVERY_TIMING_LOOP_GAIN0,0x51); 00116 /*writereg(RF22_REG_2C_OOK_COUNTER_VALUE_1,0x2a); 00117 writereg(RF22_REG_2D_OOK_COUNTER_VALUE_2,0x08);*/ //not required for fsk (OOK counter value) 00118 writereg(RF22_REG_2E_SLICER_PEAK_HOLD,0x1e); //?? 00119 writereg(RF22_REG_58,0x80); 00120 writereg(RF22_REG_69_AGC_OVERRIDE1,0x60); 00121 writereg(RF22_REG_6E_TX_DATA_RATE1,0x09); 00122 writereg(RF22_REG_6F_TX_DATA_RATE0,0xd5); 00123 writereg(RF22_REG_70_MODULATION_CONTROL1,0x2c); 00124 writereg(RF22_REG_71_MODULATION_CONTROL2,0x22);//ook = 0x21 //fsk = 0x22 00125 writereg(RF22_REG_72_FREQUENCY_DEVIATION,0x02); 00126 //set tx power 00127 writereg(RF22_REG_6D_TX_POWER,0x07); //20dbm 00128 writereg(RF22_REG_3E_PACKET_LENGTH,TX_DATA); //packet length 00129 } 00130 void FUNC_BEA() 00131 { 00132 printf("\nBeacon function entered\n"); 00133 wait(1); // wait for POR to complete //change the timing later 00134 cs=1; // chip must be deselected 00135 wait(1); //change the time later 00136 spi.format(8,0); 00137 spi.frequency(10000000); //10MHz SCLK 00138 if (readreg(RF22_REG_00_DEVICE_TYPE) == 0x08) pc.printf("spi connection valid\n"); 00139 else pc.printf("error in spi connection\n"); 00140 00141 init(); 00142 00143 //******** 00144 //button.rise(&interrupt_func); //interrupt enabled ( rising edge of pin 9) 00145 wait(0.02); // pl. update this value or even avoid it!!! 00146 //extract values from short_beacon[] 00147 uint8_t byte_counter = 0; 00148 /*struct Short_beacon{ 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 00159 for(int i = 0; i < 15 ; i++) 00160 { 00161 chavan.printf("0x%X\n",(short_beacon[i])); 00162 } 00163 //tx settings begin 00164 //setModeIdle(); 00165 writereg(RF22_REG_07_OPERATING_MODE1,0x01); //ready mode 00166 //fillTxBuf(data, len); 00167 clearTxBuf(); 00168 00169 //Set to Tx mode 00170 writereg(RF22_REG_07_OPERATING_MODE1,0x09); 00171 00172 while(byte_counter!=15){ 00173 //Check for fifoThresh 00174 while((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x20) != 0x20); 00175 //writing again 00176 cs = 0; 00177 spi.write(0xFF); 00178 for(int i=7; i>=0 ;i--) 00179 { 00180 //pc.printf("%d\n",byte_counter); 00181 if((short_beacon[byte_counter] & (uint8_t) pow(2.0,i))!=0) 00182 { 00183 spi.write(0xFF); 00184 spi.write(0xFF); 00185 } 00186 else 00187 { 00188 spi.write(0x00); 00189 spi.write(0x00); 00190 00191 } 00192 } 00193 cs = 1; 00194 byte_counter++; 00195 00196 } 00197 //rf22.waitPacketSent(); 00198 while((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x04) != 0x04);//pc.printf(" chck pkt sent!\n"); 00199 printf("\nBeacon function exiting\n"); 00200 00201 }
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