pradeep shekhar
/
dec26_fsk_shortbeacon_tx
FINAL rfm22 code for BAE
beacon.cpp@0:9c23dd0ffbeb, 2014-12-26 (annotated)
- Committer:
- shekhar
- Date:
- Fri Dec 26 10:03:13 2014 +0000
- Revision:
- 0:9c23dd0ffbeb
FINAL RFM22 BEACON code for BAE
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
shekhar | 0:9c23dd0ffbeb | 1 | #include "beacon.h" |
shekhar | 0:9c23dd0ffbeb | 2 | #include "HK.h" |
shekhar | 0:9c23dd0ffbeb | 3 | Serial chavan(USBTX, USBRX); // tx, rx |
shekhar | 0:9c23dd0ffbeb | 4 | SPI spi(PTD6,PTD7,PTD5); // mosi, miso, sclk |
shekhar | 0:9c23dd0ffbeb | 5 | DigitalOut cs(PTC11); //slave select or chip select |
shekhar | 0:9c23dd0ffbeb | 6 | |
shekhar | 0:9c23dd0ffbeb | 7 | extern ShortBeacy Shortbeacon; |
shekhar | 0:9c23dd0ffbeb | 8 | |
shekhar | 0:9c23dd0ffbeb | 9 | void writereg(uint8_t reg,uint8_t val) |
shekhar | 0:9c23dd0ffbeb | 10 | { |
shekhar | 0:9c23dd0ffbeb | 11 | cs = 0;__disable_irq();spi.write(reg | 0x80);spi.write(val);__enable_irq();cs = 1; |
shekhar | 0:9c23dd0ffbeb | 12 | } |
shekhar | 0:9c23dd0ffbeb | 13 | uint8_t readreg(uint8_t reg) |
shekhar | 0:9c23dd0ffbeb | 14 | { |
shekhar | 0:9c23dd0ffbeb | 15 | int val;cs = 0;__disable_irq();spi.write(reg & ~0x80);val = spi.write(0);__enable_irq();cs = 1;return val; |
shekhar | 0:9c23dd0ffbeb | 16 | } |
shekhar | 0:9c23dd0ffbeb | 17 | void clearTxBuf() |
shekhar | 0:9c23dd0ffbeb | 18 | { |
shekhar | 0:9c23dd0ffbeb | 19 | writereg(RF22_REG_08_OPERATING_MODE2,0x01); |
shekhar | 0:9c23dd0ffbeb | 20 | writereg(RF22_REG_08_OPERATING_MODE2,0x00); |
shekhar | 0:9c23dd0ffbeb | 21 | } |
shekhar | 0:9c23dd0ffbeb | 22 | void clearRxBuf() |
shekhar | 0:9c23dd0ffbeb | 23 | { |
shekhar | 0:9c23dd0ffbeb | 24 | writereg(RF22_REG_08_OPERATING_MODE2,0x02); |
shekhar | 0:9c23dd0ffbeb | 25 | writereg(RF22_REG_08_OPERATING_MODE2,0x00); |
shekhar | 0:9c23dd0ffbeb | 26 | } |
shekhar | 0:9c23dd0ffbeb | 27 | int setFrequency(float centre,float afcPullInRange) |
shekhar | 0:9c23dd0ffbeb | 28 | { |
shekhar | 0:9c23dd0ffbeb | 29 | //freq setting begins |
shekhar | 0:9c23dd0ffbeb | 30 | uint8_t fbsel = 0x40; |
shekhar | 0:9c23dd0ffbeb | 31 | uint8_t afclimiter; |
shekhar | 0:9c23dd0ffbeb | 32 | if (centre >= 480.0) { |
shekhar | 0:9c23dd0ffbeb | 33 | centre /= 2; |
shekhar | 0:9c23dd0ffbeb | 34 | fbsel |= 0x20; |
shekhar | 0:9c23dd0ffbeb | 35 | afclimiter = afcPullInRange * 1000000.0 / 1250.0; |
shekhar | 0:9c23dd0ffbeb | 36 | } else { |
shekhar | 0:9c23dd0ffbeb | 37 | if (afcPullInRange < 0.0 || afcPullInRange > 0.159375) |
shekhar | 0:9c23dd0ffbeb | 38 | return false; |
shekhar | 0:9c23dd0ffbeb | 39 | afclimiter = afcPullInRange * 1000000.0 / 625.0; |
shekhar | 0:9c23dd0ffbeb | 40 | } |
shekhar | 0:9c23dd0ffbeb | 41 | centre /= 10.0; |
shekhar | 0:9c23dd0ffbeb | 42 | float integerPart = floor(centre); |
shekhar | 0:9c23dd0ffbeb | 43 | float fractionalPart = centre - integerPart; |
shekhar | 0:9c23dd0ffbeb | 44 | |
shekhar | 0:9c23dd0ffbeb | 45 | uint8_t fb = (uint8_t)integerPart - 24; // Range 0 to 23 |
shekhar | 0:9c23dd0ffbeb | 46 | fbsel |= fb; |
shekhar | 0:9c23dd0ffbeb | 47 | uint16_t fc = fractionalPart * 64000; |
shekhar | 0:9c23dd0ffbeb | 48 | writereg(RF22_REG_73_FREQUENCY_OFFSET1, 0); // REVISIT |
shekhar | 0:9c23dd0ffbeb | 49 | writereg(RF22_REG_74_FREQUENCY_OFFSET2, 0); |
shekhar | 0:9c23dd0ffbeb | 50 | writereg(RF22_REG_75_FREQUENCY_BAND_SELECT, fbsel); |
shekhar | 0:9c23dd0ffbeb | 51 | writereg(RF22_REG_76_NOMINAL_CARRIER_FREQUENCY1, fc >> 8); |
shekhar | 0:9c23dd0ffbeb | 52 | writereg(RF22_REG_77_NOMINAL_CARRIER_FREQUENCY0, fc & 0xff); |
shekhar | 0:9c23dd0ffbeb | 53 | writereg(RF22_REG_2A_AFC_LIMITER, afclimiter); |
shekhar | 0:9c23dd0ffbeb | 54 | return 0; |
shekhar | 0:9c23dd0ffbeb | 55 | } |
shekhar | 0:9c23dd0ffbeb | 56 | |
shekhar | 0:9c23dd0ffbeb | 57 | void init() |
shekhar | 0:9c23dd0ffbeb | 58 | { |
shekhar | 0:9c23dd0ffbeb | 59 | //reset() |
shekhar | 0:9c23dd0ffbeb | 60 | writereg(RF22_REG_07_OPERATING_MODE1,0x80); //sw_reset |
shekhar | 0:9c23dd0ffbeb | 61 | wait(1); //takes time to reset |
shekhar | 0:9c23dd0ffbeb | 62 | |
shekhar | 0:9c23dd0ffbeb | 63 | clearTxBuf(); |
shekhar | 0:9c23dd0ffbeb | 64 | clearRxBuf(); |
shekhar | 0:9c23dd0ffbeb | 65 | //txfifoalmostempty |
shekhar | 0:9c23dd0ffbeb | 66 | writereg(RF22_REG_7D_TX_FIFO_CONTROL2,5); |
shekhar | 0:9c23dd0ffbeb | 67 | //rxfifoalmostfull |
shekhar | 0:9c23dd0ffbeb | 68 | writereg(RF22_REG_7E_RX_FIFO_CONTROL,20); |
shekhar | 0:9c23dd0ffbeb | 69 | //Packet-engine registers |
shekhar | 0:9c23dd0ffbeb | 70 | 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 |
shekhar | 0:9c23dd0ffbeb | 71 | //&0x77 = diasable packet rx-tx handling |
shekhar | 0:9c23dd0ffbeb | 72 | writereg(RF22_REG_32_HEADER_CONTROL1,0x88); //RF22_REG_32_HEADER_CONTROL1, RF22_BCEN_HEADER3 | RF22_HDCH_HEADER3 |
shekhar | 0:9c23dd0ffbeb | 73 | writereg(RF22_REG_33_HEADER_CONTROL2,0x42); //RF22_REG_33_HEADER_CONTROL2, RF22_HDLEN_4 | RF22_SYNCLEN_2 |
shekhar | 0:9c23dd0ffbeb | 74 | writereg(RF22_REG_34_PREAMBLE_LENGTH,8); //RF22_REG_34_PREAMBLE_LENGTH, nibbles); preamble length = 8; |
shekhar | 0:9c23dd0ffbeb | 75 | writereg(RF22_REG_36_SYNC_WORD3,0x2D); //syncword3=2D |
shekhar | 0:9c23dd0ffbeb | 76 | writereg(RF22_REG_37_SYNC_WORD2,0xD4); //syncword2=D4 |
shekhar | 0:9c23dd0ffbeb | 77 | writereg(RF22_REG_3F_CHECK_HEADER3,0); //RF22_REG_3F_CHECK_HEADER3, RF22_DEFAULT_NODE_ADDRESS |
shekhar | 0:9c23dd0ffbeb | 78 | writereg(RF22_REG_3A_TRANSMIT_HEADER3,0xab); //header_to |
shekhar | 0:9c23dd0ffbeb | 79 | writereg(RF22_REG_3B_TRANSMIT_HEADER2,0xbc); //header_from |
shekhar | 0:9c23dd0ffbeb | 80 | writereg(RF22_REG_3C_TRANSMIT_HEADER1,0xcd); //header_ids |
shekhar | 0:9c23dd0ffbeb | 81 | writereg(RF22_REG_3D_TRANSMIT_HEADER0,0xde); //header_flags |
shekhar | 0:9c23dd0ffbeb | 82 | writereg(RF22_REG_3F_CHECK_HEADER3,0xab); |
shekhar | 0:9c23dd0ffbeb | 83 | writereg(RF22_REG_40_CHECK_HEADER2,0xbc); |
shekhar | 0:9c23dd0ffbeb | 84 | writereg(RF22_REG_41_CHECK_HEADER1,0xcd); |
shekhar | 0:9c23dd0ffbeb | 85 | writereg(RF22_REG_42_CHECK_HEADER0,0xde); |
shekhar | 0:9c23dd0ffbeb | 86 | |
shekhar | 0:9c23dd0ffbeb | 87 | //RSSI threshold for clear channel indicator |
shekhar | 0:9c23dd0ffbeb | 88 | writereg(RF22_REG_27_RSSI_THRESHOLD,0xA5); //55 for -80dBm, 2D for -100dBm, 7D for -60dBm, A5 for -40dBm, CD for -20 dBm |
shekhar | 0:9c23dd0ffbeb | 89 | |
shekhar | 0:9c23dd0ffbeb | 90 | writereg(RF22_REG_0B_GPIO_CONFIGURATION0,0x15); // TX state ?? |
shekhar | 0:9c23dd0ffbeb | 91 | writereg(RF22_REG_0C_GPIO_CONFIGURATION1,0x12); // RX state ?? |
shekhar | 0:9c23dd0ffbeb | 92 | |
shekhar | 0:9c23dd0ffbeb | 93 | //interrupts |
shekhar | 0:9c23dd0ffbeb | 94 | // spiWrite(RF22_REG_05_INTERRUPT_ENABLE1, RF22_ENTXFFAEM |RF22_ENRXFFAFULL | RF22_ENPKSENT |RF22_ENPKVALID| RF22_ENCRCERROR); |
shekhar | 0:9c23dd0ffbeb | 95 | // spiWrite(RF22_REG_06_INTERRUPT_ENABLE2, RF22_ENPREAVAL); |
shekhar | 0:9c23dd0ffbeb | 96 | |
shekhar | 0:9c23dd0ffbeb | 97 | setFrequency(435.0, 0.05); |
shekhar | 0:9c23dd0ffbeb | 98 | |
shekhar | 0:9c23dd0ffbeb | 99 | //return !(statusRead() & RF22_FREQERR); |
shekhar | 0:9c23dd0ffbeb | 100 | if((readreg(RF22_REG_02_DEVICE_STATUS)& 0x08)!= 0x00) |
shekhar | 0:9c23dd0ffbeb | 101 | pc.printf("frequency not set properly\n"); |
shekhar | 0:9c23dd0ffbeb | 102 | //frequency set |
shekhar | 0:9c23dd0ffbeb | 103 | |
shekhar | 0:9c23dd0ffbeb | 104 | //setModemConfig(FSK_Rb2_4Fd36); FSK_Rb2_4Fd36, ///< FSK, No Manchester, Rb = 2.4kbs, Fd = 36kHz |
shekhar | 0:9c23dd0ffbeb | 105 | //setmodemregisters |
shekhar | 0:9c23dd0ffbeb | 106 | //0x1b, 0x03, 0x41, 0x60, 0x27, 0x52, 0x00, 0x07, 0x40, 0x0a, 0x1e, 0x80, 0x60, 0x13, 0xa9, 0x2c, 0x22, 0x3a = FSK_RB2_4FD36 |
shekhar | 0:9c23dd0ffbeb | 107 | //0xc8, 0x03, 0x39, 0x20, 0x68, 0xdc, 0x00, 0x6b, 0x2a, 0x08, 0x2a, 0x80, 0x60, 0x13, 0xa9, 0x2c, 0x21, 0x08 = OOK,2.4, 335 |
shekhar | 0:9c23dd0ffbeb | 108 | writereg(RF22_REG_1C_IF_FILTER_BANDWIDTH,0x2B); |
shekhar | 0:9c23dd0ffbeb | 109 | writereg(RF22_REG_1F_CLOCK_RECOVERY_GEARSHIFT_OVERRIDE,0x03); |
shekhar | 0:9c23dd0ffbeb | 110 | writereg(RF22_REG_20_CLOCK_RECOVERY_OVERSAMPLING_RATE,0x41); |
shekhar | 0:9c23dd0ffbeb | 111 | writereg(RF22_REG_21_CLOCK_RECOVERY_OFFSET2,0x60); |
shekhar | 0:9c23dd0ffbeb | 112 | writereg(RF22_REG_22_CLOCK_RECOVERY_OFFSET1,0x27); //updated 20 to 25 reg values from excel sheet for 1.2 Khz freq. deviation,fsk |
shekhar | 0:9c23dd0ffbeb | 113 | writereg(RF22_REG_23_CLOCK_RECOVERY_OFFSET0,0x52); |
shekhar | 0:9c23dd0ffbeb | 114 | writereg(RF22_REG_24_CLOCK_RECOVERY_TIMING_LOOP_GAIN1,0x00); |
shekhar | 0:9c23dd0ffbeb | 115 | writereg(RF22_REG_25_CLOCK_RECOVERY_TIMING_LOOP_GAIN0,0x51); |
shekhar | 0:9c23dd0ffbeb | 116 | /*writereg(RF22_REG_2C_OOK_COUNTER_VALUE_1,0x2a); |
shekhar | 0:9c23dd0ffbeb | 117 | writereg(RF22_REG_2D_OOK_COUNTER_VALUE_2,0x08);*/ //not required for fsk (OOK counter value) |
shekhar | 0:9c23dd0ffbeb | 118 | writereg(RF22_REG_2E_SLICER_PEAK_HOLD,0x1e); //?? |
shekhar | 0:9c23dd0ffbeb | 119 | writereg(RF22_REG_58,0x80); |
shekhar | 0:9c23dd0ffbeb | 120 | writereg(RF22_REG_69_AGC_OVERRIDE1,0x60); |
shekhar | 0:9c23dd0ffbeb | 121 | writereg(RF22_REG_6E_TX_DATA_RATE1,0x09); |
shekhar | 0:9c23dd0ffbeb | 122 | writereg(RF22_REG_6F_TX_DATA_RATE0,0xd5); |
shekhar | 0:9c23dd0ffbeb | 123 | writereg(RF22_REG_70_MODULATION_CONTROL1,0x2c); |
shekhar | 0:9c23dd0ffbeb | 124 | writereg(RF22_REG_71_MODULATION_CONTROL2,0x22);//ook = 0x21 //fsk = 0x22 |
shekhar | 0:9c23dd0ffbeb | 125 | writereg(RF22_REG_72_FREQUENCY_DEVIATION,0x02); |
shekhar | 0:9c23dd0ffbeb | 126 | //set tx power |
shekhar | 0:9c23dd0ffbeb | 127 | writereg(RF22_REG_6D_TX_POWER,0x07); //20dbm |
shekhar | 0:9c23dd0ffbeb | 128 | writereg(RF22_REG_3E_PACKET_LENGTH,TX_DATA); //packet length |
shekhar | 0:9c23dd0ffbeb | 129 | } |
shekhar | 0:9c23dd0ffbeb | 130 | void FUNC_BEA() |
shekhar | 0:9c23dd0ffbeb | 131 | { |
shekhar | 0:9c23dd0ffbeb | 132 | printf("\nBeacon function entered\n"); |
shekhar | 0:9c23dd0ffbeb | 133 | wait(1); // wait for POR to complete //change the timing later |
shekhar | 0:9c23dd0ffbeb | 134 | cs=1; // chip must be deselected |
shekhar | 0:9c23dd0ffbeb | 135 | wait(1); //change the time later |
shekhar | 0:9c23dd0ffbeb | 136 | spi.format(8,0); |
shekhar | 0:9c23dd0ffbeb | 137 | spi.frequency(10000000); //10MHz SCLK |
shekhar | 0:9c23dd0ffbeb | 138 | if (readreg(RF22_REG_00_DEVICE_TYPE) == 0x08) pc.printf("spi connection valid\n"); |
shekhar | 0:9c23dd0ffbeb | 139 | else pc.printf("error in spi connection\n"); |
shekhar | 0:9c23dd0ffbeb | 140 | |
shekhar | 0:9c23dd0ffbeb | 141 | init(); |
shekhar | 0:9c23dd0ffbeb | 142 | |
shekhar | 0:9c23dd0ffbeb | 143 | //******** |
shekhar | 0:9c23dd0ffbeb | 144 | //button.rise(&interrupt_func); //interrupt enabled ( rising edge of pin 9) |
shekhar | 0:9c23dd0ffbeb | 145 | wait(0.02); // pl. update this value or even avoid it!!! |
shekhar | 0:9c23dd0ffbeb | 146 | //extract values from short_beacon[] |
shekhar | 0:9c23dd0ffbeb | 147 | uint8_t byte_counter = 0; |
shekhar | 0:9c23dd0ffbeb | 148 | /*struct Short_beacon{ |
shekhar | 0:9c23dd0ffbeb | 149 | uint8_t Voltage[1]; |
shekhar | 0:9c23dd0ffbeb | 150 | uint8_t AngularSpeed[2]; |
shekhar | 0:9c23dd0ffbeb | 151 | uint8_t SubsystemStatus[1]; |
shekhar | 0:9c23dd0ffbeb | 152 | uint8_t Temp[3]; |
shekhar | 0:9c23dd0ffbeb | 153 | uint8_t ErrorFlag[1]; |
shekhar | 0:9c23dd0ffbeb | 154 | }Shortbeacon = { {0x88}, {0x99, 0xAA} , {0xAA},{0xAA,0xDD,0xEE}, {0x00} }; |
shekhar | 0:9c23dd0ffbeb | 155 | */ |
shekhar | 0:9c23dd0ffbeb | 156 | //filling hk data |
shekhar | 0:9c23dd0ffbeb | 157 | 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 | 0:9c23dd0ffbeb | 158 | |
shekhar | 0:9c23dd0ffbeb | 159 | for(int i = 0; i < 15 ; i++) |
shekhar | 0:9c23dd0ffbeb | 160 | { |
shekhar | 0:9c23dd0ffbeb | 161 | chavan.printf("0x%X\n",(short_beacon[i])); |
shekhar | 0:9c23dd0ffbeb | 162 | } |
shekhar | 0:9c23dd0ffbeb | 163 | //tx settings begin |
shekhar | 0:9c23dd0ffbeb | 164 | //setModeIdle(); |
shekhar | 0:9c23dd0ffbeb | 165 | writereg(RF22_REG_07_OPERATING_MODE1,0x01); //ready mode |
shekhar | 0:9c23dd0ffbeb | 166 | //fillTxBuf(data, len); |
shekhar | 0:9c23dd0ffbeb | 167 | clearTxBuf(); |
shekhar | 0:9c23dd0ffbeb | 168 | |
shekhar | 0:9c23dd0ffbeb | 169 | //Set to Tx mode |
shekhar | 0:9c23dd0ffbeb | 170 | writereg(RF22_REG_07_OPERATING_MODE1,0x09); |
shekhar | 0:9c23dd0ffbeb | 171 | |
shekhar | 0:9c23dd0ffbeb | 172 | while(byte_counter!=15){ |
shekhar | 0:9c23dd0ffbeb | 173 | //Check for fifoThresh |
shekhar | 0:9c23dd0ffbeb | 174 | while((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x20) != 0x20); |
shekhar | 0:9c23dd0ffbeb | 175 | //writing again |
shekhar | 0:9c23dd0ffbeb | 176 | cs = 0; |
shekhar | 0:9c23dd0ffbeb | 177 | spi.write(0xFF); |
shekhar | 0:9c23dd0ffbeb | 178 | for(int i=7; i>=0 ;i--) |
shekhar | 0:9c23dd0ffbeb | 179 | { |
shekhar | 0:9c23dd0ffbeb | 180 | //pc.printf("%d\n",byte_counter); |
shekhar | 0:9c23dd0ffbeb | 181 | if((short_beacon[byte_counter] & (uint8_t) pow(2.0,i))!=0) |
shekhar | 0:9c23dd0ffbeb | 182 | { |
shekhar | 0:9c23dd0ffbeb | 183 | spi.write(0xFF); |
shekhar | 0:9c23dd0ffbeb | 184 | spi.write(0xFF); |
shekhar | 0:9c23dd0ffbeb | 185 | } |
shekhar | 0:9c23dd0ffbeb | 186 | else |
shekhar | 0:9c23dd0ffbeb | 187 | { |
shekhar | 0:9c23dd0ffbeb | 188 | spi.write(0x00); |
shekhar | 0:9c23dd0ffbeb | 189 | spi.write(0x00); |
shekhar | 0:9c23dd0ffbeb | 190 | |
shekhar | 0:9c23dd0ffbeb | 191 | } |
shekhar | 0:9c23dd0ffbeb | 192 | } |
shekhar | 0:9c23dd0ffbeb | 193 | cs = 1; |
shekhar | 0:9c23dd0ffbeb | 194 | byte_counter++; |
shekhar | 0:9c23dd0ffbeb | 195 | |
shekhar | 0:9c23dd0ffbeb | 196 | } |
shekhar | 0:9c23dd0ffbeb | 197 | //rf22.waitPacketSent(); |
shekhar | 0:9c23dd0ffbeb | 198 | while((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x04) != 0x04);//pc.printf(" chck pkt sent!\n"); |
shekhar | 0:9c23dd0ffbeb | 199 | printf("\nBeacon function exiting\n"); |
shekhar | 0:9c23dd0ffbeb | 200 | |
shekhar | 0:9c23dd0ffbeb | 201 | } |