File content as of revision 43:d89fe237a684:

// by Matthias Grob & Manuel Stalder - ETH Zürich - 2015
#include "mbed.h"
#include "PC.h"                                     // Serial Port via USB for debugging with Terminal
#include "DW1000.h"                                 // our DW1000 device driver
#include "MMRanging.h"                              // our self developed raning application

PC          pc(USBTX, USBRX, 921600);               // USB UART Terminal
DW1000      dw(PA_7, PA_6, PA_5, PB_6, PB_9);       // Device driver instanceSPI pins: (MOSI, MISO, SCLK, CS, IRQ)
MMRanging   r(dw);                                  // Ranging class for getting distances and later positions

int average_index = 0;

int main() {
    pc.printf("\r\nDecaWave 1.0   up and running!\r\n");  
    dw.setEUI(0xFAEDCD01FAEDCD01);                                  // basic methods called to check if we have a working SPI connection
    pc.printf("DEVICE_ID register: 0x%X\r\n", dw.getDeviceID());
    pc.printf("EUI register: %016llX\r\n", dw.getEUI());
    pc.printf("Voltage: %fV\r\n", dw.getVoltage());
    pc.printf("System Configuration: %llX\r\n", dw.readRegister40(DW1000_SYS_CFG, 0));
    pc.printf("Size of Rangingframe: %d\r\n", sizeof(r.TX));
    
    pc.printf("Antenna Delay TX: %d\r\n", dw.readRegister16(DW1000_TX_ANTD, 0));
    pc.printf("Antenna Delay RX: %d\r\n", dw.readRegister16(DW1000_LDE_CTRL, 0x1804));
    pc.printf("TX Power: %llX\r\n", dw.readRegister40(DW1000_TX_POWER, 0));
    //r.receiver = true;
    if (r.receiver)
        r.address = 1;
    else
        r.address = 0; // sender node has address 0
    pc.printf("Address: %d\r\n", r.address);
    //wait(1);
    
    while(1) {
        if (!r.receiver) {
            #if 0 // normal operation
                r.requestRangingAll();
                for (int i = 1; i <= 4; i++) {  // Request ranging to all anchors
                    pc.printf("%f, ", r.distances[i]);
                    //pc.printf("%f s\r\n", r.roundtriptimes[i]);
                }
                pc.printf("\r\n");
            #endif
            #if 0 // calibration of antennadelay
                float rangings[1000];
                int index = 0;
            
                r.requestRanging(1);
                if (r.distances[1] < 100) {
                    rangings[index] = r.distances[1];
                    //pc.printf("%f, ", r.distances[1]);
                    index++;
                }
                if (index == 1000) {
                    for(int i = 0; i < 999; i++)
                        rangings[999] += rangings[i];
                    float mean = rangings[999] / 1000;
                    pc.printf("\r\n\r\nMean: %f Delay: %d\r\n\r\n", mean, setdelay);
                    wait(2);
                    if(mean > 5)
                        setdelay += 10;
                    else
                        setdelay--;
                    if(abs(mean-5) < 0.003f) {
                        pc.printf("\r\n\r\nDELAY: %d\r\n\r\n", setdelay);
                        return 0;
                    }
                    dw.writeRegister16(DW1000_TX_ANTD, 0, setdelay / 2);
                    dw.writeRegister16(DW1000_LDE_CTRL, 0x1804, setdelay / 2);
                    index = 0; 
                }
            #endif
        } else {
            //pc.printf("%lld\r\n", r.timeDifference40Bit(r.rangingtimingsReceiver[0][0], r.rangingtimingsReceiver[0][1]));  // debuging output to find 40Bit overflows on receiver side
        }
        
        #if 1 // averaging the distance with a ringbuffer
            float averaged = 0;
            float average[1000];
            
            int i = 1;
            r.requestRanging(i);
            average[average_index] = r.distances[i];
            average_index++;
            if(average_index == 1000) {
                average_index = 0;
                for(int j = 0; j < 1000; j++)
                    averaged += average[j];
                averaged /= 1000;
                pc.printf("Distance: %f\r\n", averaged);
                pc.printf("Calibrated: %f\r\n", -0.123 *averaged*averaged + 2.564 * averaged - 5.332 );
            }
        #endif
        
        #if 0 // Output bars on console
            for(int i = 1; i < 3; i++) {
                pc.printf("%lld [", r.tofs[i]);
                int dots = r.tofs[i]*70/1400;
                if (abs(dots) < 10000)
                    for(int j = 0; j < dots; j++)
                        pc.printf("=");
                pc.printf("]\r\n");
            }
        #endif
        
        #ifdef EVENTS   // Output interrupt callback events for debugging (defined in MMRanging.h)
            for(int j = 0; j < 10; j++)
                if(r.event[j][0] == '!') {
                    pc.printf("%s\r\n", r.event[j]);
                    r.event[j][0] = 'X';
                }
            r.event_i = 0;
        #endif
        //pc.printf("Status: %llX\r\n", dw.getStatus());
        //pc.printf("TX Control: %llX\r\n", dw.readRegister40(DW1000_TX_FCTRL, 0));
        //pc.printf("\r\n");
        wait(0.002);
        //wait(0.2);
    }
}