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:
1:f2d9ed33c276
Parent:
0:346c723cac97
Child:
2:3b3b435ca8d9
--- a/AS3935.cpp	Sat Apr 05 23:24:41 2014 +0000
+++ b/AS3935.cpp	Thu Jun 11 15:47:29 2015 +0000
@@ -18,26 +18,49 @@
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */
 
-#include "AS3935.hpp"
+#include "AS3935.h"
+#include "pinmap.h"
 
-AS3935::AS3935(PinName sda, PinName scl, int adresse): i2c(sda, scl), _adress(adresse) {        
-        
+#if 0
+AS3935::AS3935(PinName sda, PinName scl, int adress, int hz): i2c(sda, scl), _adress(adress), m_FREQ(hz) {        
+
         wait_ms(11);
-    }
-
+        //Configure the SPI bus
+        m_Spi.format(8, 1);
+}
     //~AS3935(){
         
     //}
-        
+#endif
+#if 1
+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)
+{
+ 
+    //Enable the internal pull-up resistor on MISO
+    pin_mode(miso, PullUp);
+
+    //Configure the SPI bus
+    m_Spi.format(8, 1);
+}
+#endif        
+ 
+ 
+char AS3935::_SPITransfer2(char high, char low)
+{
+    m_Cs = 0;
+    m_Spi.write(high);
+    char regval = m_Spi.write(low);
+    // printf("raw transfer for reg %x is 0x%02x\r\n", high, regval);
+    m_Cs = 1;
+    return regval;  
+}
+
 char AS3935::_rawRegisterRead(char reg)
 {
-    char data;
-    i2c.write( _adress, &reg, 1, true);
-    i2c.read(_adress, &data, 1);
-    return data;
-    
+    return _SPITransfer2((reg & 0x3F) | 0x40, 0);
 }
 
+
 char AS3935::_ffsz(char mask)
 {
     char i = 0;
@@ -59,7 +82,7 @@
 
 void AS3935::registerWrite(char reg, char mask, char data)
 {
-    char cmd[2];
+   
     char regval;
     regval = _rawRegisterRead(reg);
     regval &= ~(mask);
@@ -69,51 +92,52 @@
     //else {
       //  regval |= data;
        // }
-    cmd[0] = reg;
-    cmd[1] = regval;
-    i2c.write( _adress, cmd, 2);
-
+       
+    m_Cs = 0;
+    m_Spi.write(reg);
+    m_Spi.write(regval);
+    //printf("raw transfer for reg %x is 0x%02x\r\n", high, regval);
+    m_Cs = 1;
+    wait_ms(2);
 }
 
 char AS3935::registerRead(char reg, char mask)
-    {
+{
     char regval;
     regval = _rawRegisterRead(reg);
+    // printf("raw regval is 0x%02x\r\n", regval);
     regval = regval & mask;
-    //if (mask){
-        regval >>= (_ffsz(mask));
-      //  }
+    regval >>= (_ffsz(mask));
     return regval;
 }
 
 void AS3935::reset()
-    {
-    char cmd[2];
-    cmd[0] = 0x3C;
-    cmd[1] = 0x96;
-    i2c.write( _adress, cmd, 2);
+ {
+    m_Cs = 0;
+    m_Spi.write(0x3D);
+    m_Spi.write(0x96);
+    m_Cs = 1;
     wait_ms(2);
-    }
-
-
+} 
 
 void AS3935::powerDown()
-    {
+{
     registerWrite(AS3935_PWD,1);
-    }
+}
 
 void AS3935::powerUp()
-    {
-    char cmd[2];
-    cmd[0] = 0x3D;
-    cmd[1] = 0x96;
+{
+ 
     registerWrite(AS3935_PWD,0);
-    i2c.write( _adress, cmd, 2);
+    m_Cs = 0;
+    m_Spi.write(0x3D);
+    m_Spi.write(0x96);
+    m_Cs = 1;
     wait_ms(3);
     registerWrite(AS3935_DISP_TRCO,1);
     wait_ms(2);
     registerWrite(AS3935_DISP_TRCO,0);
-    }
+}
 
 int AS3935::interruptSource()
     {