This is final Standalone code tested on Beacon. #FSK

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main.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 #include "beacon.h"
00009 Serial pc(USBTX, USBRX);          // tx, rx
00010 SPI spi(D11, D12, D13);              // mosi, miso, sclk
00011 DigitalOut cs(D10);                //slave select or chip select
00012 Serial chavan(USBTX, USBRX);           // tx, rx
00013 
00014 void writereg(uint8_t reg,uint8_t val)
00015 {
00016     cs = 0;__disable_irq();spi.write(reg | 0x80);spi.write(val);__enable_irq();cs = 1;
00017 }
00018 uint8_t readreg(uint8_t reg)
00019 {
00020     int val;cs = 0;__disable_irq();spi.write(reg & ~0x80);val = spi.write(0);__enable_irq();cs = 1;return val;
00021 }
00022 void clearTxBuf()
00023 {
00024     writereg(RF22_REG_08_OPERATING_MODE2,0x01);
00025     writereg(RF22_REG_08_OPERATING_MODE2,0x00);
00026 }
00027 void clearRxBuf()
00028 {
00029     writereg(RF22_REG_08_OPERATING_MODE2,0x02);
00030     writereg(RF22_REG_08_OPERATING_MODE2,0x00);
00031 }
00032 int setFrequency(float centre,float afcPullInRange)
00033 {
00034 //freq setting begins 
00035     uint8_t fbsel = 0x40;
00036     uint8_t afclimiter;
00037     if (centre >= 480.0) {
00038         centre /= 2;
00039         fbsel |= 0x20;
00040         afclimiter = afcPullInRange * 1000000.0 / 1250.0;
00041     } else {
00042         if (afcPullInRange < 0.0 || afcPullInRange > 0.159375)
00043             return false;
00044         afclimiter = afcPullInRange * 1000000.0 / 625.0;
00045     }
00046     centre /= 10.0;
00047     float integerPart = floor(centre);
00048     float fractionalPart = centre - integerPart;
00049  
00050     uint8_t fb = (uint8_t)integerPart - 24; // Range 0 to 23
00051     fbsel |= fb;
00052     uint16_t fc = fractionalPart * 64000;
00053     writereg(RF22_REG_73_FREQUENCY_OFFSET1, 0);  // REVISIT
00054     writereg(RF22_REG_74_FREQUENCY_OFFSET2, 0);
00055     writereg(RF22_REG_75_FREQUENCY_BAND_SELECT, fbsel);
00056     writereg(RF22_REG_76_NOMINAL_CARRIER_FREQUENCY1, fc >> 8);
00057     writereg(RF22_REG_77_NOMINAL_CARRIER_FREQUENCY0, fc & 0xff);
00058     writereg(RF22_REG_2A_AFC_LIMITER, afclimiter);
00059     return 0;
00060 }
00061 
00062 void init()
00063 {
00064     //reset()
00065     writereg(RF22_REG_07_OPERATING_MODE1,0x80);        //sw_reset
00066     wait(1);                    //takes time to reset                                  
00067 
00068     clearTxBuf();                                                             
00069     clearRxBuf();                                                             
00070     //txfifoalmostempty
00071     writereg(RF22_REG_7D_TX_FIFO_CONTROL2,5);
00072     //rxfifoalmostfull
00073     writereg(RF22_REG_7E_RX_FIFO_CONTROL,20);
00074     //Packet-engine registers
00075     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
00076     //&0x77 = diasable packet rx-tx handling
00077     writereg(RF22_REG_32_HEADER_CONTROL1,0x88);    //RF22_REG_32_HEADER_CONTROL1, RF22_BCEN_HEADER3 | RF22_HDCH_HEADER3
00078     writereg(RF22_REG_33_HEADER_CONTROL2,0x42);    //RF22_REG_33_HEADER_CONTROL2, RF22_HDLEN_4 | RF22_SYNCLEN_2
00079     writereg(RF22_REG_34_PREAMBLE_LENGTH,8);       //RF22_REG_34_PREAMBLE_LENGTH, nibbles); preamble length = 8;
00080     writereg(RF22_REG_36_SYNC_WORD3,0x2D);    //syncword3=2D
00081     writereg(RF22_REG_37_SYNC_WORD2,0xD4);    //syncword2=D4
00082     writereg(RF22_REG_3F_CHECK_HEADER3,0);    //RF22_REG_3F_CHECK_HEADER3, RF22_DEFAULT_NODE_ADDRESS
00083     writereg(RF22_REG_3A_TRANSMIT_HEADER3,0xab);    //header_to
00084     writereg(RF22_REG_3B_TRANSMIT_HEADER2,0xbc);    //header_from 
00085     writereg(RF22_REG_3C_TRANSMIT_HEADER1,0xcd);    //header_ids
00086     writereg(RF22_REG_3D_TRANSMIT_HEADER0,0xde);    //header_flags
00087     writereg(RF22_REG_3F_CHECK_HEADER3,0xab);   
00088     writereg(RF22_REG_40_CHECK_HEADER2,0xbc);   
00089     writereg(RF22_REG_41_CHECK_HEADER1,0xcd);   
00090     writereg(RF22_REG_42_CHECK_HEADER0,0xde);
00091     
00092     //RSSI threshold for clear channel indicator
00093     writereg(RF22_REG_27_RSSI_THRESHOLD,0xA5);         //55 for -80dBm, 2D for -100dBm, 7D for -60dBm, A5 for -40dBm, CD for -20 dBm
00094     
00095     writereg(RF22_REG_0B_GPIO_CONFIGURATION0,0x15); // TX state                        ??
00096     writereg(RF22_REG_0C_GPIO_CONFIGURATION1,0x12); // RX state                        ??
00097     
00098     //interrupts
00099     // spiWrite(RF22_REG_05_INTERRUPT_ENABLE1, RF22_ENTXFFAEM |RF22_ENRXFFAFULL | RF22_ENPKSENT |RF22_ENPKVALID| RF22_ENCRCERROR);
00100     // spiWrite(RF22_REG_06_INTERRUPT_ENABLE2, RF22_ENPREAVAL);
00101     
00102     setFrequency(435.0, 0.05);
00103     
00104     //return !(statusRead() & RF22_FREQERR);
00105     if((readreg(RF22_REG_02_DEVICE_STATUS)& 0x08)!= 0x00)
00106     pc.printf("frequency not set properly\n");
00107     //frequency set
00108 
00109     //setModemConfig(FSK_Rb2_4Fd36);       FSK_Rb2_4Fd36,       ///< FSK, No Manchester, Rb = 2.4kbs,  Fd = 36kHz
00110     //setmodemregisters
00111     //0x1b, 0x03, 0x41, 0x60, 0x27, 0x52, 0x00, 0x07, 0x40, 0x0a, 0x1e, 0x80, 0x60, 0x13, 0xa9, 0x2c, 0x22, 0x3a = FSK_RB2_4FD36
00112     //0xc8, 0x03, 0x39, 0x20, 0x68, 0xdc, 0x00, 0x6b, 0x2a, 0x08, 0x2a, 0x80, 0x60, 0x13, 0xa9, 0x2c, 0x21, 0x08 = OOK,2.4, 335
00113     writereg(RF22_REG_1C_IF_FILTER_BANDWIDTH,0x2B);
00114     writereg(RF22_REG_1F_CLOCK_RECOVERY_GEARSHIFT_OVERRIDE,0x03);
00115     writereg(RF22_REG_20_CLOCK_RECOVERY_OVERSAMPLING_RATE,0x41);
00116     writereg(RF22_REG_21_CLOCK_RECOVERY_OFFSET2,0x60);                     
00117     writereg(RF22_REG_22_CLOCK_RECOVERY_OFFSET1,0x27);           //updated 20 to 25 reg values from excel sheet for 1.2 Khz freq. deviation,fsk
00118     writereg(RF22_REG_23_CLOCK_RECOVERY_OFFSET0,0x52);
00119     writereg(RF22_REG_24_CLOCK_RECOVERY_TIMING_LOOP_GAIN1,0x00);
00120     writereg(RF22_REG_25_CLOCK_RECOVERY_TIMING_LOOP_GAIN0,0x51);
00121     /*writereg(RF22_REG_2C_OOK_COUNTER_VALUE_1,0x2a);
00122     writereg(RF22_REG_2D_OOK_COUNTER_VALUE_2,0x08);*/    //not required for fsk (OOK counter value)
00123     writereg(RF22_REG_2E_SLICER_PEAK_HOLD,0x1e);         //??
00124     writereg(RF22_REG_58,0x80);
00125     writereg(RF22_REG_69_AGC_OVERRIDE1,0x60);
00126     writereg(RF22_REG_6E_TX_DATA_RATE1,0x09);
00127     writereg(RF22_REG_6F_TX_DATA_RATE0,0xd5);
00128     writereg(RF22_REG_70_MODULATION_CONTROL1,0x2c);
00129     writereg(RF22_REG_71_MODULATION_CONTROL2,0x22);//ook = 0x21 //fsk = 0x22
00130     writereg(RF22_REG_72_FREQUENCY_DEVIATION,0x02);
00131     //set tx power
00132     writereg(RF22_REG_6D_TX_POWER,0x07);    //20dbm
00133     writereg(RF22_REG_3E_PACKET_LENGTH,TX_DATA); //packet length     
00134 }
00135 int main()
00136 {
00137     printf("\nBeacon function entered\n");
00138     wait(1);                     // wait for POR to complete   //change the timing later
00139     cs=1;                          // chip must be deselected
00140     wait(1);                    //change the time later
00141     spi.format(8,0);
00142     spi.frequency(10000000);       //10MHz SCLK    
00143     if (readreg(RF22_REG_00_DEVICE_TYPE) == 0x08) pc.printf("spi connection valid\n");
00144     else pc.printf("error in spi connection\n");
00145 
00146     init();   
00147     
00148     //********
00149     //button.rise(&interrupt_func);         //interrupt enabled ( rising edge of pin 9)
00150     wait(0.02);                                                           // pl. update this value  or even avoid it!!!                  
00151     //extract values from short_beacon[]
00152     uint8_t byte_counter = 0;
00153     struct Short_beacon{
00154         uint8_t Voltage[1];
00155         uint8_t AngularSpeed[2];
00156         uint8_t SubsystemStatus[1];
00157         uint8_t Temp[3];
00158         uint8_t ErrorFlag[1];
00159         }Shortbeacon = { {0x88}, {0x99, 0xAA} , {0xAA},{0xAA,0xDD,0xEE}, {0x00} };
00160     
00161     //filling hk data
00162     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]};
00163     
00164     for(int i = 0; i < 15 ; i++)
00165     {
00166         chavan.printf("0x%X\n",(short_beacon[i]));    
00167     }
00168     //tx settings begin
00169     //setModeIdle();
00170     writereg(RF22_REG_07_OPERATING_MODE1,0x01);        //ready mode
00171     //fillTxBuf(data, len);
00172     clearTxBuf();  
00173         
00174     //Set to Tx mode
00175     writereg(RF22_REG_07_OPERATING_MODE1,0x09);
00176     
00177     while(byte_counter!=15){
00178         //Check for fifoThresh
00179         while((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x20) != 0x20);
00180         //writing again
00181         cs = 0;
00182         spi.write(0xFF);   
00183         for(int i=7; i>=0 ;i--)
00184         {
00185             //pc.printf("%d\n",byte_counter);
00186             if((short_beacon[byte_counter] & (uint8_t) pow(2.0,i))!=0)
00187         {
00188             spi.write(0xFF);
00189             spi.write(0xFF);
00190         }
00191         else
00192         {
00193             spi.write(0x00);
00194             spi.write(0x00);
00195             
00196         }
00197         }
00198         cs = 1;
00199         byte_counter++;
00200         
00201     }  
00202     //rf22.waitPacketSent();
00203     while((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x04) != 0x04)pc.printf(" chck pkt sent!\n");     
00204     printf("\nBeacon function exiting\n");
00205     
00206 }