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:
3:c536a9aa2a1c
Parent:
2:3b3b435ca8d9
Child:
4:ab1f1b65468b
--- a/AS3935.cpp	Thu Jun 11 15:53:51 2015 +0000
+++ b/AS3935.cpp	Thu Jun 11 19:45:11 2015 +0000
@@ -21,7 +21,7 @@
 #include "AS3935.h"
 #include "pinmap.h"
 
-AS3935::AS3935(PinName mosi, PinName miso, PinName sclk, PinName cs, const char* name, PinName cd, int hz) :  m_Spi(mosi, miso, sclk), m_Cs(cs, 1), m_Cd(cd), m_FREQ(hz)
+AS3935::AS3935(PinName mosi, PinName miso, PinName sclk, PinName cs, const char* name, int hz) :  m_Spi(mosi, miso, sclk), m_Cs(cs, 1),  m_FREQ(hz)
 {
  
     //Enable the internal pull-up resistor on MISO
@@ -29,6 +29,9 @@
 
     //Configure the SPI bus
     m_Spi.format(8, 1);
+    printf("spi bus frequency set to %d hz\r\n",hz);
+    m_Spi.frequency(hz);
+  
 }
  
 char AS3935::_SPITransfer2(char high, char low)
@@ -201,4 +204,33 @@
     registerWrite(AS3935_CL_STAT,1);
     registerWrite(AS3935_CL_STAT,0);
     registerWrite(AS3935_CL_STAT,1);
-}
\ No newline at end of file
+}
+
+int AS3935::calibrateRCOs (void)
+{
+    int rc;
+    uint8_t trco;
+    uint8_t srco;
+    m_Cs = 0;
+    m_Spi.write(0x3D);        // Direct Command Calibrate RCO
+    m_Spi.write(0x96);
+    m_Cs = 1;
+    wait_ms(1);                          // wait 1ms
+    registerWrite(0x08, 0x40, 0x40);    // ERRATA: after power down mode
+    wait_ms(2);                                   // wait 1ms
+    registerWrite(0x08, 0x40, 0x00);    // ERRATA: after power down mode
+    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;
+        printf("cal is done\r\n");
+    }
+    else
+    {
+        printf("cal is not done\r\n");
+        rc = 0;
+    }
+
+    return rc;
+}