CaryCoders / AS3935

AS3935 Lightning sensor library

Dependents:   zeus

Fork of AS3935 by valentin spanu

include the mbed library with this snippet

#include "mbed.h"
#include "AS3935.h"

 // frdm-kl25z sd card connections for spi1 
 // ------------------------------------------------
 // Header -- kl25z -- SD/MMC          
 // J2-20  -- PTE1  -- MOSI
 // J9-13  -- PTE4  -- CS
 // J2-14  -- GND   -- Vss (GND) 
 // J9-9   -- PTE2  -- SCK
 // J9-11  -- PTE3  -- MISO
 
AS3935 ld(PTE1, PTE3, PTE2, PTE4, "ld", 100000); // MOSI, MISO, SCK, CS, SPI bus freq (hz) 
InterruptIn IntLightning(PTA12); //IRQ AS3935
DigitalOut led1(LED_RED);
Serial pc(USBTX, USBRX);

void DetectLightning()
{
    char OriginInt;
     wait_ms(2); 
    OriginInt = ld.interruptSource();
    if (OriginInt == 1) { //
        pc.printf(" Noise level too high\r\n");
        }
    if (OriginInt == 4) { //
        pc.printf(" Disturber\r\n");
        }
    if (OriginInt == 8) { // detection
        // pc.printf(" Lightning detection\r\n");
        pc.printf(" Lightning detection, distance=%dkm\r\n", ld.lightningDistanceKm());
        ld.clearStats();

        }
}

 
int main() {
    pc.baud(9600);
    pc.printf("\r\nstart lightning detector\r\n");
    
    //initialisations
    ld.reset();
    ld.setTuneCap(5); // 500kHz
    ld.powerUp();
    ld.setIndoors();  
    ld.setMinimumLightnings(1);
    //ld.setSpikeRejection(2);
    ld.setNoiseFloor(2);
    ld.disableDisturbers();
    //ld.enableDisturbers();
    ld.setWatchdogThreshold(2);
    wait_ms(10);
    IntLightning.rise(&DetectLightning);
    int MinBlysk = ld.getMinimumLightnings();
    int Noise = ld.getNoiseFloor();
    int TuneCap = ld.getTuneCap();
    int SpikeRej = ld.getSpikeRejection();
    int WatchDog = ld.getWatchdogThreshold();
     
    pc.printf(" Min wylad: %i", MinBlysk);
    pc.printf("\r\n");
    pc.printf(" Noise: %i", Noise);
    pc.printf("\r\n");
    pc.printf(" Tune CAP: %i", TuneCap);
    pc.printf("\r\n");
    pc.printf(" Spike rej: %i", SpikeRej);
    pc.printf("\r\n");
    pc.printf(" Watchdog: %i", WatchDog);
    pc.printf("\r\n");
    while(1) {
        led1 = ! led1;
        wait(0.2);
     }
    
 
 }

Diff: AS3935.cpp

Revision:
12:ac6ba62a31c6
Parent:
11:ee2e7a573227
Child:
15:afbf7ba667e7
--- a/AS3935.cpp	Wed Jun 24 16:36:47 2015 +0000
+++ b/AS3935.cpp	Wed Jun 24 18:18:37 2015 +0000
@@ -222,7 +222,7 @@
     intrIn.rise(intrPulseCntr); 
     
     _SPITransfer2(0x3D, 0x96);                        // send command to calibrate the internal RC oscillators           
-    _SPITransfer2(8, 0x20);                           // put TRCO on the IRQ line for measurement   
+    registerWrite(AS3935_DISP_TRCO, 1);               // put TRCO on the IRQ line for measurement   
     wait_ms(20);                                      // wait for the chip to output the frequency, ususally ~2 ms 
     
     pulseTimer.reset(); 
@@ -234,13 +234,14 @@
     {
       timeNow = pulseTimer.read_ms(); 
     }
-    _SPITransfer2(8, 0);                              // stop the output of the frequncy on IRQ line       
+    
+    registerWrite(AS3935_DISP_TRCO, 0);               // stop the output of the frequncy on IRQ line       
     measFreq = sgIntrPulseCount << 1;                 // calculate the measure frequency based upon period of capture and freq scaler
 
     printf("timer RCO: %ld Hz\n\r", measFreq);
     
-    trco=registerRead(0x3A, 0x80);                      // Read out Calibration of TRCO done
-    srco=registerRead(0x3B, 0x80);                      // Readout Calibration of SRCO done
+    trco=registerRead(0x3A, 0x80);                    // Read out Calibration of TRCO done
+    srco=registerRead(0x3B, 0x80);                    // Readout Calibration of SRCO done
     if(trco != 0x00 && srco != 0x00)
     {
         rc = 1;
@@ -285,6 +286,7 @@
       {
         timeNow = pulseTimer.read_ms(); 
       }
+      
       _SPITransfer2(8, 0x00);                           // stop the output of the frequncy on IRQ line 
       
       measFreq = sgIntrPulseCount << 7;                 // calulate the measure frequency based upon period of capture and freq scaler