Diff: magsensorv2.cpp

Revision:

0:8664d36d4ff3

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/magsensorv2.cpp	Thu Aug 14 17:32:01 2014 +0000
@@ -0,0 +1,148 @@
+
+#include "mbed.h"
+#include "MAG3110.h"
+#include "SLCD.h"
+/* 
+Test of magnetometer and other sensors on the KL46Z board. Not clear to me at this
+time what the conversion factor of the magnetic field values map to.
+set up state machine to cycle through what is displayed on the LCD screen. Remember
+there are 4 characthers plus a "free" decimal point. - 140721 sc 
+*/
+#define MESSTIME 0.5
+#define BLINKTIME 500
+#define DATATIME 200
+#define LEDOFF 1
+#define LEDON 0
+#define MESSAGETIME 0.3
+#define LIGHT "LGHT"
+#define MAGX_LBL "MAGX"
+#define MAGY_LBL "MAGY"
+#define BOTIX_LBL "BOTX"
+
+// States
+#define NUMSTATES 4
+#define L_STATE 0
+#define MAGX_STATE 1
+#define MAGY_STATE 2
+#define BOTIX_STATE 3
+
+#define PROGNAME "MAG v2.0"
+#define LPRNAME "MV2.0"
+
+// look at this site for PIN defintions. http://mbed.org/platforms/FRDM-KL46Z/
+// #define PRINTDBUG
+
+MAG3110 mag(PTE25, PTE24);
+
+SLCD slcd; //define LCD display
+AnalogIn LightSensor(PTE22);
+AnalogIn MaxBotix(PTB0);
+Serial pc(USBTX, USBRX);
+Timer LEDTimer;
+Timer DATATimer;
+
+void LCDMess(char *lMess){
+        slcd.Home();
+        slcd.clear();
+        slcd.printf(lMess);
+} 
+
+void LCDTMess(char *lMess, float Ddelay){
+        slcd.Home();
+        slcd.clear();
+        slcd.printf(lMess);
+        wait(Ddelay);
+}
+int main() {
+    DigitalOut Rled(LED_RED);
+    DigitalOut Gled(LED_GREEN);
+    int displayState = 2; // show magy first on LCD
+    int LButtonState;
+    DigitalIn LftButton(PTC3);
+    int ledState = true;
+    float lightValue; //Read from ADC connected to ambient light sensor (photo transistor)
+    int magX = 0, magY = 0, magZ = 0; // Magnetic field data
+    float MaxBValue;
+    char lcdData[10];
+
+// Do once... equivalent to the setup fucntion in the Arduino paradigm
+    mag.begin();
+// Setup event timers for LED blink and taking magnetometer data
+    LEDTimer.start();
+    LEDTimer.reset();
+    DATATimer.start();
+    DATATimer.reset();
+  // Show program name LCD and Serial
+    pc.printf(PROGNAME);
+    LCDTMess(LPRNAME,MESSTIME);
+// Do forever... equivalent to the loop fucntion in the Arduino paradigm
+    while (true) {
+        // read the inverted logic of the left button on the board.
+        LButtonState = !LftButton;
+        if (LButtonState) {  //Change data that is displayed cycle through states 
+            displayState++;
+            displayState = displayState % NUMSTATES; // Roll over if greater than the number of states defined
+            switch (displayState) {
+                case L_STATE: {
+                    LCDTMess(LIGHT,MESSTIME);
+                    break;
+                 }
+                 case MAGX_STATE: {
+                    LCDTMess(MAGX_LBL,MESSTIME);
+                    break;
+                 }
+                  case MAGY_STATE:{
+                    LCDTMess(MAGY_LBL,MESSTIME);
+                    break;
+                 }
+                  case BOTIX_STATE:{
+                    LCDTMess(BOTIX_LBL,MESSTIME);
+                    break;
+                }
+                 
+            }
+        }
+// Manage mag and light data
+        if (DATATimer.read_ms() > DATATIME){ //take data at DATATIME intervals
+            DATATimer.reset();
+            lightValue = 1.0-LightSensor.read();  
+            mag.getValues(&magX, &magY, &magZ);
+            MaxBValue = MaxBotix.read();
+            
+#ifdef PRINTDBUG
+            pc.printf("%f\r\n", lightValue);
+            pc.printf("%d\r\n", magX);
+            pc.printf("%d\r\n", magY);
+            pc.printf("%d\r\n", MaxBotix);
+#endif
+        
+            switch (displayState) {
+                case L_STATE: {
+                    sprintf (lcdData,"%4.3f",lightValue);
+                    break;
+                 }
+                 case MAGX_STATE: {
+                     sprintf (lcdData,"%4d",magX/100);
+                    break;
+                 }
+                 case MAGY_STATE: {
+                     sprintf (lcdData,"%4d",magY/10);
+                    break;
+                 }
+                 case BOTIX_STATE:{
+                    sprintf (lcdData,"%4.3f",MaxBValue);
+                    break;
+                 }
+            }
+            LCDMess(lcdData);
+        }
+// Manage LED's
+        if(LEDTimer.read_ms() > BLINKTIME) { // Blink LED's for dramatic effect.
+                LEDTimer.reset();
+            ledState = !ledState;
+            Rled = ledState;
+            Gled = !ledState;
+        }
+       
+    }
+}
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