File content as of revision 3:3d9e5f48b0c1:

//switch off the sync!!!!!!!
//switch off the preamble!!!!!!!
/*for crc in tx:
regIrq2(0x28) :

regpacketconfig 1(0x37) :
set crc detection/calc. on : | 0x10
crcautoclearoff : | 0x08  

for data whitening : regpacketconfig 1(0x37) :| 0x40
for 



*/
// 6CC000 for 435 MHz
//set all values as FF for checking on spectrum analyzer
#include "beacon.h"
#include "HK.h"
Serial chavan(USBTX, USBRX);           // tx, rx
SPI spi(PTD6,PTD7,PTD5);               // mosi, miso, sclk
DigitalOut cs_bar(PTC11);                 //slave select or chip select
//InterruptIn button(p9);
//#define TIMES 16      
//Timer t;

/*void interrupt_func()
{
    chavan.printf("INTERRUPT_FUNC TRIGGERED\n  wait for 3 secs\n"); 
    wait(3);
    
}*/

extern  ShortBeacy Shortbeacon;
void writereg(uint8_t reg,uint8_t val)
{
    cs_bar = 0;
    spi.write(reg | 0x80);      
    spi.write(val);
    cs_bar = 1;
}
uint8_t readreg(uint8_t reg)
{
    uint8_t val;
    cs_bar = 0;
    spi.write(reg & ~0x80);        
    val = spi.write(0);
    cs_bar = 1;
    return val;
}
        
void FUNC_BEA() {
    
    //button.rise(&interrupt_func);         //interrupt enabled ( rising edge of pin 9)
    printf("\nBeacon function entered\n");
    wait(0.02);                             //takes 10 ms for POR event + 10ms for safety                 
    
    uint8_t byte_counter = 0;
    
    /*struct Short_beacon{
        uint8_t Voltage[1];
        uint8_t AngularSpeed[2];
        uint8_t SubsystemStatus[1];
        uint8_t Temp[3];
        uint8_t ErrorFlag[1];
        }Shortbeacon = { {0x22}, {0x22, 0x33} , {0x00},{0x00,0x00,0x00}, {0xFE} };
    */
    //filling hk data
    //ShortBeacon Shortbeacon;
    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]};
    
    //mask
    //uint8_t mask[] = {0x80, 0x40, 0x20,0x10,0x8,0x4,0x2,0x1};
        
    for(int i = 0; i < 15 ; i++)
    {
        chavan.printf("0x%X\n",(short_beacon[i]));    
    }
    
    spi.format(8,0);                    
    spi.frequency(10000000);             //10MHz SCLK frequency(its max for rfm69hcw)
    cs_bar = 1;                              // Chip must be deselected
    
    //initialization
    //Common configuration registers
    writereg(0x01,0x04);       //sequencer on,standby mode
    writereg(0x02,0x08);       //packet-mode used  , ook modultion , no dc-shaping
    writereg(0x03,0x68);       //1200bps datarate
    writereg(0x04,0x2B);       //1200bps datarate
    writereg(0x07,0x6C);       //Frequency MSB
    writereg(0x08,0xC0);       //Frequency MID
    writereg(0x09,0x00);       //Frequency LSB        ....6C C0 00 for 435 MHZ   
    
    //Transmitter registers
    // RegPaLevel(default +13 dBm)
    
    //IRQ and Pin Mapping Registers
    //no DIO mapped yet
    //regirq1(0x27): modeready (8th bit) will be checked for interrupts
    //regIrq2(0x28): fifothresh (5th bit) ,packetsent(3rd bit) will be checked for interrupts
    
    //Packet Engine Registers
    writereg(0x2C,0x00);        //set preamble
    writereg(0x2D,0x0A);        //set preamble
    writereg(0x2E,0x80);        //sync off        
    writereg(0x2F,0x5E);        //sync word 1               
    writereg(0x37,0x08 | 0x40);// | 0x10);        //packetconfig1, 0x40 for data whitening (only for testing)                
    writereg(0x38,0x00);        //payload length = 0 ... unlimited payload mode
    writereg(0x3C,0xB0);         //fifothresh = 48      because we want it cleared once its 40!!!!
    //Initialization complete
    
    //while(chavan.getc() == 't'){
    //t.start();  
    //Filling Data into FIFO 64 BYTES : eff.32 bits = 4bytes                  //fread
    cs_bar = 0; 
    spi.write(0x80);//fifo write access
    for(byte_counter=0 ; byte_counter<4; byte_counter++)
    {    
        for(int i=7; i>=0  ; i--)
        {
            if((short_beacon[byte_counter] & (uint8_t) pow(2.0,i))!=0)
            //if((short_beacon[byte_counter] & mask[i]) != 0)
            {
                spi.write(0xFF);
                spi.write(0xFF);
            }
    else
            {
                spi.write(0x00);
                spi.write(0x00);
            }
        }
    }
    cs_bar = 1; //cs_bar
                
    //Check for fifoThresh
    printf("\nfor loop executed\n");
    while((readreg(0x28) & 0x20) != 0x20);                         
    printf("\nwhile loop executed\n");
    //Highpower settings
    writereg(0x11,0x7F);    //RegPalevel (20db)                //~
    writereg(0x13,0x0F);    //RegOCP
    writereg(0x5A,0x5D);    //RegTestPa1
    writereg(0x5C,0x7C);    //RegTestPa2
        
    //Set to Tx mode
    writereg(0x01,0x0C);
    
        printf("\npre 2nd while loop\n");
        //Check for fifoThresh
        while((readreg(0x28) & 0x20) != 0x00);  
        printf("\n2nd while loop executed\n");        
        while(byte_counter!=15){
            
        //writing again
        cs_bar = 0;
        spi.write(0x80);   
        for(int i=7; i>=0 ;i--)
        {
            if((short_beacon[byte_counter] & (uint8_t) pow(2.0,i))!=0)
            //if((short_beacon[byte_counter] & mask[i]) != 0)
        {
            spi.write(0xFF);
            spi.write(0xFF);
        }
        else
        {
            spi.write(0x00);
            spi.write(0x00);
        }
        }
        cs_bar = 1;
        byte_counter++;
                       
        //Check for fifoThresh
        while((readreg(0x28) & 0x20) != 0x00);
    }
    printf("\n3rd big while loop executed\n");
    //wait for packet sent bit to fire
    while((readreg(0x28) & 0x08) != 0x08);
    printf("\n4th while loop executed\n");
    //chavan.printf("packet sent!!! \n");    
    
    //Switch back to Standby Mode
    writereg(0x01,0x04);
    
    //Lowpowermode
    writereg(0x11,0x9F);    //RegPalevel (13db)
    writereg(0x13,0x1A);    //RegOCP
    writereg(0x5A,0x55);    //RegTestPa1(setting PA_BOOST on RFIO)
    writereg(0x5C,0x70);    //RegTestPa2(setting PA_BOOST on RFIO)
    
    //wait for modeready
    while((readreg(0x27)&0x80)!=0x80);
    
    //t.stop();
    //chavan.printf(" time taken to init + transmit = %f \n", t.read()) ;
    //}
printf("\nBeacon function exiting\n");
}