pradeep shekhar
/
14-8-15_beacon_testing
Repo for beacon testing
main.cpp
- Committer:
- shekhar
- Date:
- 2015-10-04
- Revision:
- 5:3d447f4786f1
- Parent:
- 4:b51ca6ee9136
- Child:
- 6:f0fb224c958b
File content as of revision 5:3d447f4786f1:
#include "beacon.h" Serial pc(USBTX, USBRX); // tx, rx SPI spi(D11, D12, D13); // mosi, miso, sclk //SPI spi(PTA16, PTA17, PTA15); // mosi, miso, sclk DigitalOut cs(D10); //slave select or chip select void writereg(uint8_t reg,uint8_t val) { cs = 0;spi.write(reg | 0x80);spi.write(val);cs = 1; } uint8_t readreg(uint8_t reg) { int val;cs = 0;spi.write(reg & ~0x80);val = spi.write(0);cs = 1;return val; } void clearTxBuf() { writereg(RF22_REG_08_OPERATING_MODE2,0x01); writereg(RF22_REG_08_OPERATING_MODE2,0x00); } void clearRxBuf() { writereg(RF22_REG_08_OPERATING_MODE2,0x02); writereg(RF22_REG_08_OPERATING_MODE2,0x00); } int setFrequency(float centre,float afcPullInRange) { //freq setting begins uint8_t fbsel = 0x40; uint8_t afclimiter; if (centre >= 480.0) { centre /= 2; fbsel |= 0x20; afclimiter = afcPullInRange * 1000000.0 / 1250.0; } else { if (afcPullInRange < 0.0 || afcPullInRange > 0.159375) return false; afclimiter = afcPullInRange * 1000000.0 / 625.0; } centre /= 10.0; float integerPart = floor(centre); float fractionalPart = centre - integerPart; uint8_t fb = (uint8_t)integerPart - 24; // Range 0 to 23 fbsel |= fb; uint16_t fc = fractionalPart * 64000; writereg(RF22_REG_73_FREQUENCY_OFFSET1, 0); // REVISIT writereg(RF22_REG_74_FREQUENCY_OFFSET2, 0); writereg(RF22_REG_75_FREQUENCY_BAND_SELECT, fbsel); writereg(RF22_REG_76_NOMINAL_CARRIER_FREQUENCY1, fc >> 8); writereg(RF22_REG_77_NOMINAL_CARRIER_FREQUENCY0, fc & 0xff); writereg(RF22_REG_2A_AFC_LIMITER, afclimiter); return 0; } void init() { //reset() writereg(RF22_REG_07_OPERATING_MODE1,0x80); //sw_reset wait(1); //takes time to reset clearTxBuf(); clearRxBuf(); //txfifoalmostempty writereg(RF22_REG_7D_TX_FIFO_CONTROL2,10); //rxfifoalmostfull writereg(RF22_REG_7E_RX_FIFO_CONTROL,20); //Packet-engine registers writereg(RF22_REG_30_DATA_ACCESS_CONTROL,0x00); //RF22_REG_30_DATA_ACCESS_CONTROL, RF22_ENPACRX | RF22_ENPACTX | RF22_ENCRC | RF22_CRC_CRC_16_IBM //0x00 //writereg(RF22_REG_32_HEADER_CONTROL1,0x88); //RF22_REG_32_HEADER_CONTROL1, RF22_BCEN_HEADER3 | RF22_HDCH_HEADER3 //not reqiured for tx writereg(RF22_REG_33_HEADER_CONTROL2,0x08); //RF22_REG_33_HEADER_CONTROL2, RF22_HDLEN_4 | RF22_SYNCLEN_2 //why 0x42 //or 0x00?? writereg(RF22_REG_34_PREAMBLE_LENGTH,0x00); //RF22_REG_34_PREAMBLE_LENGTH, nibbles); preamble length = 8; //why is preamble used?? //writereg(RF22_REG_36_SYNC_WORD3,0x2D); //syncword3=2D //why?? //writereg(RF22_REG_37_SYNC_WORD2,0xD4); //syncword2=D4 //why?? //writereg(RF22_REG_3F_CHECK_HEADER3,0); //RF22_REG_3F_CHECK_HEADER3, RF22_DEFAULT_NODE_ADDRESS //why all these headers //writereg(RF22_REG_3A_TRANSMIT_HEADER3,0xab); //header_to //writereg(RF22_REG_3B_TRANSMIT_HEADER2,0xbc); //header_from //writereg(RF22_REG_3C_TRANSMIT_HEADER1,0xcd); //header_ids //writereg(RF22_REG_3D_TRANSMIT_HEADER0,0xde); //header_flags //writereg(RF22_REG_3F_CHECK_HEADER3,0xab); //writereg(RF22_REG_40_CHECK_HEADER2,0xbc); //writereg(RF22_REG_41_CHECK_HEADER1,0xcd); //writereg(RF22_REG_42_CHECK_HEADER0,0xde); //RSSI threshold for clear channel indicator //rx //writereg(RF22_REG_27_RSSI_THRESHOLD,0xA5); //55 for -80dBm, 2D for -100dBm, 7D for -60dBm, A5 for -40dBm, CD for -20 dBm writereg(RF22_REG_0B_GPIO_CONFIGURATION0,0x15); // TX state ?? writereg(RF22_REG_0C_GPIO_CONFIGURATION1,0x12); // RX state ?? //interrupts // spiWrite(RF22_REG_05_INTERRUPT_ENABLE1, RF22_ENTXFFAEM |RF22_ENRXFFAFULL | RF22_ENPKSENT |RF22_ENPKVALID| RF22_ENCRCERROR); // spiWrite(RF22_REG_06_INTERRUPT_ENABLE2, RF22_ENPREAVAL); setFrequency(435.0, 0.05);//check //return !(statusRead() & RF22_FREQERR); if((readreg(RF22_REG_02_DEVICE_STATUS)& 0x08)!= 0x00) pc.printf("frequency not set properly\n"); //frequency set //setModemConfig(FSK_Rb2_4Fd36); FSK_Rb2_4Fd36, ///< FSK, No Manchester, Rb = 2.4kbs, Fd = 36kHz //setmodemregisters //0x1b, 0x03, 0x41, 0x60, 0x27, 0x52, 0x00, 0x07, 0x40, 0x0a, 0x1e, 0x80, 0x60, 0x13, 0xa9, 0x2c, 0x22, 0x3a = FSK_RB2_4FD36 //0xc8, 0x03, 0x39, 0x20, 0x68, 0xdc, 0x00, 0x6b, 0x2a, 0x08, 0x2a, 0x80, 0x60, 0x13, 0xa9, 0x2c, 0x21, 0x08 = OOK,2.4, 335 writereg(RF22_REG_1C_IF_FILTER_BANDWIDTH,0xdf); writereg(RF22_REG_1F_CLOCK_RECOVERY_GEARSHIFT_OVERRIDE,0x03); writereg(RF22_REG_20_CLOCK_RECOVERY_OVERSAMPLING_RATE,0x39); writereg(RF22_REG_21_CLOCK_RECOVERY_OFFSET2,0x20); writereg(RF22_REG_22_CLOCK_RECOVERY_OFFSET1,0x68); //updated 20 to 25 reg values from excel sheet for 1.2 Khz freq. deviation,fsk writereg(RF22_REG_23_CLOCK_RECOVERY_OFFSET0,0xdc); writereg(RF22_REG_24_CLOCK_RECOVERY_TIMING_LOOP_GAIN1,0x00); writereg(RF22_REG_25_CLOCK_RECOVERY_TIMING_LOOP_GAIN0,0x6B); writereg(RF22_REG_2C_OOK_COUNTER_VALUE_1,0x2C); writereg(RF22_REG_2D_OOK_COUNTER_VALUE_2,0x11); //not required for fsk (OOK counter value) writereg(RF22_REG_2E_SLICER_PEAK_HOLD,0x2A); //?? writereg(RF22_REG_58,0x80); writereg(RF22_REG_69_AGC_OVERRIDE1,0x60); //check...//also depends on 0x70[5] writereg(RF22_REG_6E_TX_DATA_RATE1,0x02);//TX at 0.123kbps=:6E=0x01; 6F=0x06 writereg(RF22_REG_6F_TX_DATA_RATE0,0x9F);//TX at 1.2kbps: 6E=0x09; 6F=0xd5 //Formula: tx_datarate*(2^21)/10^6 //For 0.160kbps 6E = 01 6F=50 //for 0.320kbps 029F writereg(RF22_REG_70_MODULATION_CONTROL1,0x2c); writereg(RF22_REG_71_MODULATION_CONTROL2,0x21);//ook = 0x21 //fsk = 0x22 writereg(RF22_REG_72_FREQUENCY_DEVIATION,0x50); //required for OOK??? //set tx power writereg(RF22_REG_6D_TX_POWER,0x07); //20dbm //why 0x06?? 0x07 is for max//is the previous bits required? //writereg(RF22_REG_6D_TX_POWER,0x00); //-1dbm writereg(RF22_REG_3E_PACKET_LENGTH,TX_DATA); //packet length //packet length not required } int main() { wait(1); // wait for POR to complete //change the timing later cs=1; // chip must be deselected wait(1); //change the time later spi.format(8,0); spi.frequency(10000000); //10MHz SCLK if (readreg(RF22_REG_00_DEVICE_TYPE) == 0x08) pc.printf("spi connection valid\n"); else pc.printf("error in spi connection\n"); init(); //init complete pc.printf("init complete.....press t to send\n"); //******** while(pc.getc()=='t') //1 { /*uint8_t data[] = "Hello World!"; pc.printf("%d %d %d %d %d %d %d %d %d %d %d %d",data[0],data[1],data[2],data[3],data[4],data[5],data[6],data[7],data[8],data[9],data[10],data[11],data[12]);*/ uint8_t data[255]; //starts from 0,1,2,3,4!!!; int i = 0; //for loops int u = 0; //universal count for hk array int bar = 0; //filling hk data /*for(int n=0; n<1; n++) data[n] = 0xAA; data[1] = 0x3A; */ //for(int n=0; n<15; n++) /*data[0] = 0xAB; data[1] = 0x8A; data[2] = 0xE2; data[3] = 0xBB; data[4] = 0xB8; data[5] = 0xA2; data[6] = 0x8E; data[7] = 0x88; data[8] = 0x99; data[9] = 0xAA; data[10] = 0xAA; data[11] = 0xAA; data[12] = 0xDD; data[13] = 0xEE; data[14] = 0x00; */ /*for(int n=50; n<60; n++) data[n] = n; */ //for(int n=60; n<120; n++) // data[n] = 0x11; /*for(int n=75; n<97; n++) data[n] = 0xBC; for(int n=97; n<110; n++) data[n] = 0xEC; for(int n=110; n<120; n++) data[n] = 0xFC; */ for(int n=0; n<255; n++) data[n] = 0xAB; /*uint8_t stuff[] = "IITMSAT IITMSAT"; for(int i = 0 ; i < 15 ; ++i){ data[i] = stuff[i]; }*/ //for(int n=150; n<TX_DATA; n++) // data[n] = 0x11; //tx settings begin //setModeIdle(); writereg(RF22_REG_07_OPERATING_MODE1,0x01); //ready mode //fillTxBuf(data, len); clearTxBuf(); //Filling Data into FIFO for the first time /*cs = 0; spi.write(0xFF); //fifo write access for(i=0; i<datalen; i++){ spi.write(data[i]); pc.printf("0x%X \n",data[u+i]); } u=i;//check its 64 cs = 1; */ //Set to Tx mode writereg(RF22_REG_07_OPERATING_MODE1,0x09); //Check for fifoempty Thresh //while((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x20) != 0x20); u = 0; while(u!=TX_DATA) { if((TX_DATA - u) >= TIMES) bar = TIMES; else bar = (TX_DATA - u); //writing again cs = 0; spi.write(0xFF); //FIFO write access //for(i=0; i<bar; i++,u++) for(i=0; i<(bar/2); i++) { u=u+2; //spi.write(data[i]); spi.write(0xFF); spi.write(0x00); pc.printf("%d\n",u); } //u = u + i; cs = 1; //Check for fifoThresh while((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x20) != 0x20); } //rf22.waitPacketSent(); while((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x04) != 0x04)pc.printf(" chck pkt sent!\n"); pc.printf(" packet sent "); } }