Diff: BCN.cpp

Revision:

0:7b4c00e3912f

Child:

11:1fdb94ae6563

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/BCN.cpp	Thu Dec 24 19:15:43 2015 +0000
@@ -0,0 +1,403 @@
+#include "BCN.h"
+#include <stdio.h>
+#include "pin_config.h"
+
+Serial pc_bcn(USBTX, USBRX);        //tx,rx
+SPI spi(PIN16, PIN17, PIN15);              // mosi, miso, sclk
+DigitalOut cs(PIN6);                //slave select or chip select
+Timer t;
+Timer t_i;
+Ticker loop;
+
+
+//GLOBAL VARIABLES
+uint8_t BCN_INIT_STATUS;
+uint8_t BCN_TX_MAIN_STATUS;
+uint8_t BCN_TX_STATUS;
+uint8_t BCN_TX_EN = 1;              //hardcoding for now    //check where is this variable toggled??
+uint8_t BCN_FEN = 1;                //write this to non-erasable memory.
+uint8_t BCN_STANDBY = 0;            //hardcoding for now    //check where is this variable toggled??
+uint8_t BCN_TS_BUFFER;              // For Temperature 
+
+
+void P_BCN_INIT()
+{
+    pc_bcn.printf("P_BCN_INIT\n");
+    BCN_INIT_STATUS = 1;
+    Init_BEACON_HW();
+    if (BCN_FEN == 0)
+        t.start();//Start the timer for RF_Silence
+    BCN_INIT_STATUS = 0;
+}
+void P_BCN_FEN()
+{
+    pc_bcn.printf("P_FEN\n");
+    BCN_FEN = 1;//write this value to flash
+}
+void P_BCN_TX_MAIN()
+{
+    pc_bcn.printf("P_BCN_TX_MAIN\n");
+    BCN_TX_MAIN_STATUS = 1;
+    
+    if(BCN_FEN == 1)
+    {
+        if(BCN_TX_EN == 1)
+        {
+            //Measure and store BCN temperature in BCN_TS_BUFFER
+            BCN_TS_BUFFER = check_Temperature();
+            pc_bcn.printf("\n\ntemperature = %d\n\n",BCN_TS_BUFFER);
+            //Get BCN_HK data from BCN HW(SPI) //Store BCN_HK data in BCN_HK_BUFFER
+            if(BCN_STANDBY == 1 )
+            {
+                Set_BCN_TX_STATUS(BCN_TX_STANDBY);
+                BCN_TX_MAIN_STATUS = 0;
+                
+                // break;
+            }
+            else
+            {       
+                    //transmit short beacon and long beacon
+                    t_i.start();
+                    int begin = t_i.read_us();
+                    SHORT_BCN_TX();
+                    LONG_BCN_TX();
+                    t_i.stop();
+                    int end = t_i.read_us();
+                    pc_bcn.printf("The time required for short and long is %d seconds\r\n", end-begin);
+                    
+                    if(Check_ACK_RECEIVED() == 1)
+                    {
+                        Set_BCN_TX_STATUS(BCN_TX_SUCCESS);
+                        BCN_TX_MAIN_STATUS = 0;   
+                    }
+                    else
+                    {
+                        Set_BCN_TX_STATUS(BCN_TX_FAILURE);
+                        BCN_TX_MAIN_STATUS = 0;
+                        
+                    }
+             }
+        }
+        else
+        {
+            Set_BCN_TX_STATUS(BCN_TX_DISABLED);
+            BCN_TX_MAIN_STATUS = 0;
+        }
+    }
+    else
+    {
+        Set_BCN_TX_STATUS(BCN_RF_SILENCE);  //Window of RF Silence: None of the Txs should be on.
+        BCN_TX_MAIN_STATUS = 0;
+    }
+}
+
+void Set_BCN_TX_STATUS(uint8_t STATUS)
+{
+    BCN_TX_STATUS = STATUS;
+}
+
+uint8_t check_Temperature()
+{   
+    uint8_t temperature;
+    writereg(RF22_REG_0F_ADC_CONFIGURATION,0x80);            
+    writereg(RF22_REG_12_Temperature_Sensor_Calibration,0x20);
+    wait(1);
+    temperature = readreg(RF22_REG_11_ADC_Value);
+    temperature = (float)temperature*0.5 - 64;
+    return temperature;
+}
+
+void SHORT_BCN_TX()
+{
+    writereg(RF22_REG_6E_TX_DATA_RATE,0x01);
+    writereg(RF22_REG_6F_TX_DATA_RATE,0x4F);//160bps
+    writereg(RF22_REG_3E_PACKET_LENGTH,SHORT_TX_DATA); //short packet length
+    /*
+    init();
+    //init complete
+    pc_bcn.printf("init complete.....press t to send\n");
+    while(pc_bcn.getc()=='t')
+    {   */
+    //button.rise(&interrupt_func);         //interrupt enabled ( rising edge of pin 9)
+    wait(0.02);                                                           // pl. update this value  or even avoid it!!!                  
+    int i=0;
+    //extract values from short_beacon[]
+    struct Short_beacon
+    {
+        uint8_t Voltage[1];
+        uint8_t AngularSpeed[2];
+        uint8_t SubsystemStatus[1];
+        uint8_t Temp[3];
+        uint8_t ErrorFlag[1];
+    }Shortbeacon = { {0x88}, {0x99, 0xAA} , {0xAA},{0xAA,0xDD,0xEE}, {0x00} };
+    
+    //filling hk data
+    //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]};
+    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]};
+    
+    //uint8_t short_beacon[15];
+//    for(int i = 0;i<15;i++)
+//    {
+//        short_beacon[i] = 0xAA;
+//    }
+    
+    //writereg(RF22_REG_07_OPERATING_MODE1,0x01);        //ready mode       ??    
+    clearTxBuf();     
+    //writing data first time
+    int byte = 0;
+    cs = 0;
+    spi.write(0xFF);   
+    pc_bcn.printf("line 151");
+    for (int byte_counter = 0; byte_counter <15 ; byte_counter++)
+    {
+        for(int j = 3; j >= 0 ; j--)
+        {
+            if((short_beacon[byte_counter] & (uint8_t) pow(2.0,(j*2+1)))!= pow(2.0,(j*2+1)))
+            {
+                byte=0x00;
+            }
+            else
+            { 
+                byte=0xF0;
+            }  
+            if((short_beacon[byte_counter] & (uint8_t) pow(2.0,j*2))!= pow(2.0,j*2))
+            {
+                byte=byte | 0x00;
+            }
+            else
+            { 
+               byte=byte | 0x0F;
+            }
+            spi.write(byte);
+         }
+    }   
+    
+    cs = 1;
+    pc_bcn.printf("line 177\n");
+    //Set to Tx mode
+    writereg(RF22_REG_07_OPERATING_MODE1,0x09);
+      
+    //Check for fifoThresh
+    while((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x20) != 0x20);
+    //pc_bcn.printf("fifothresh1?\n");
+    pc_bcn.printf("line 184\n");
+    //rf22.waitPacketSent();
+    while((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x04) != 0x04);
+        //pc_bcn.printf(" chk pkt sent!\r\n");     
+    pc_bcn.printf("Short packet sent\r\n");
+    
+    writereg(RF22_REG_07_OPERATING_MODE1,0x00);        //standby mode
+    
+}
+void LONG_BCN_TX()
+{
+    writereg(RF22_REG_6E_TX_DATA_RATE,0x04);
+    writereg(RF22_REG_6F_TX_DATA_RATE,0xEA);//600 bps
+    writereg(RF22_REG_3E_PACKET_LENGTH,LONG_TX_DATA); //long packet length
+    wait(0.02);                                                           
+   
+   
+    //get long_beacon array
+    
+    uint8_t Long_beacon[75];
+    for(int i = 0;i<75;i++)
+    {
+        Long_beacon[i] = 0xA0;
+    }
+   
+   
+   
+    
+    //setModeIdle();
+    writereg(RF22_REG_07_OPERATING_MODE1,0x01);        //ready mode    
+    clearTxBuf();     
+    //writing data first time
+    cs = 0;
+    spi.write(0xFF);   
+    for(int i=0; i<60;i++)
+    {
+        spi.write(Long_beacon[i]);
+    }
+    cs = 1;
+    
+    //Set to Tx mode
+    writereg(RF22_REG_07_OPERATING_MODE1,0x09);
+
+    //Check for fifoThresh
+    while((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x20) != 0x20);
+    
+    cs = 0;
+    spi.write(0xFF);   
+    for(int i=60; i<75;i++)
+    {
+        spi.write(Long_beacon[i]);
+    }
+    cs = 1;
+    wait(0.01);
+    //Check for fifoThresh
+    while((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x20) != 0x20);
+    
+    //Check for packetsent interrupt
+    while((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x04) != 0x04);
+         
+    pc_bcn.printf("Long packet sent\r\n");
+    
+    writereg(RF22_REG_07_OPERATING_MODE1,0x00);        //standby mode
+}
+void reset_uC()
+{
+    P_BCN_INIT();
+}
+void writereg(uint8_t reg,uint8_t val)
+{
+    uint8_t count = 0; 
+    for(;;count++)
+    {
+        int read_val =0; cs = 0;spi.write(reg | 0x80);spi.write(val);cs = 1;
+        if(reg != 0x7 && reg != 0x58 && reg != 0xF) 
+        {        
+            read_val = readreg(reg);
+            if (read_val == val)
+            {
+                break;    
+            }
+            else if(count == 5)
+            {
+                reset_uC(), printf("reg = 0x%X\n",reg);break;
+            }
+        }
+        else
+        break;
+    }
+}   
+uint8_t readreg(uint8_t reg)
+{
+    uint8_t 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);
+}
+uint8_t setFrequency(double centre,float afcPullInRange)
+{
+    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;
+    double integerPart = floor(centre);
+    double 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_BEACON_HW()
+{
+    cs=1;                          // chip must be deselected
+    spi.format(8,0);
+    spi.frequency(10000000);       //10MHz SCLK
+    
+    //should either have a flag for invalid SPI or discard this for actual case or add reset
+    if (readreg(RF22_REG_00_DEVICE_TYPE) == 0x08)
+        pc_bcn.printf("spi connection valid\r\n");
+    else
+        {pc_bcn.printf("error in spi connection\r\n");
+        reset_uC();
+        }
+    
+    writereg(RF22_REG_07_OPERATING_MODE1,0x80);        //sw_reset
+    wait(1);                    //takes time to reset                                  
+
+    clearTxBuf();                                                                                                                        
+    
+    writereg(RF22_REG_07_OPERATING_MODE1,0x00);        //standby mode
+       
+    //txfifoalmostempty
+    writereg(RF22_REG_7D_TX_FIFO_CONTROL2,30);
+
+    //Packet-engine registers
+    writereg(RF22_REG_30_DATA_ACCESS_CONTROL,0x00); 
+    
+    writereg(RF22_REG_33_HEADER_CONTROL2,0x08);    
+    writereg(RF22_REG_34_PREAMBLE_LENGTH,0x00);       
+
+    writereg(RF22_REG_0B_GPIO_CONFIGURATION0,0x15); // TX state                        
+    writereg(RF22_REG_0C_GPIO_CONFIGURATION1,0x12); // RX state                        
+
+    setFrequency(435.0,05);
+
+    if((readreg(RF22_REG_02_DEVICE_STATUS)& 0x08)!= 0x00)
+        {
+            //pc_bcn.printf("frequency not set properly\r\n");
+            reset_uC();
+        }
+
+    //set Modem Configuration
+    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);
+    
+    //Data rate set later
+      
+    writereg(RF22_REG_70_MODULATION_CONTROL1,0x20);
+    writereg(RF22_REG_71_MODULATION_CONTROL2,0x21);//ook = 0x21
+    
+    //set tx power
+    writereg(RF22_REG_6D_TX_POWER,0x07);    //20dbm
+    
+    //TX_packet_length written later
+}
+bool Check_ACK_RECEIVED()
+{
+    if((readreg(RF22_REG_03_INTERRUPT_STATUS1) & 0x04) == 0x04)  
+    {
+        printf("Packet sent: ACK received\r\n");
+        return 1;   
+    }
+    else
+    {
+        pc_bcn.printf("Packet not sent\r\n");
+        return 0;
+    }
+}
+/*int main()
+{
+    P_BCN_INIT(); 
+    
+    loop.attach(&P_BCN_TX_MAIN, 10.0);
+    
+    while(t.read() < RF_SILENCE_TIME);
+        
+    P_BCN_FEN();
+    
+    while(1);
+    
+}*/
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