Diff: drivers/ACS712/ACS712.h

Revision:

0:964eb6a2ef00

diff -r 000000000000 -r 964eb6a2ef00 drivers/ACS712/ACS712.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/drivers/ACS712/ACS712.h	Wed Mar 18 22:23:48 2015 +0000
@@ -0,0 +1,43 @@
+#ifndef ACS712_H
+#define ACS712_H
+
+/****
+    This class calculates the current drawn by the robot. It requires that EVERYTHING else is turned off when
+    calibration is in progress.
+    Requirement: Turn off mouse sensors somehow.
+*/
+
+#include "mbed.h"
+//#include "robot.h"
+
+#define HIGH_CURRENT 130       //increase of current when switch is turned on [mA]
+#define LOW_CURRENT 36          //current draw when everything is turned off [mA]
+#define SWITCH_PIN PTB18//HIGH_CURRENT_SWITCH
+#define SENSOR_PIN PTC2//CURRENTSENSOR_PIN
+
+#define CALIBRATION_SAMPLES 50 //the number of samples taken for the calibration
+
+class ACS712
+{
+private:
+
+    AnalogIn sensor;            //reads the value from current sensor
+    DigitalOut currentSwitch;   //turn this on to send current through a resistor
+    
+    float b;        //offset
+    float m;        //slope
+    float current;  //[mA]
+    float sensor_val;   //[% of 3.3V]
+    
+public:
+    
+    ACS712();
+    void calibrate();          //calculates m and b
+    float get_current();        //returns the current [mA]
+    float read_sensor();        //reads sensor [% of 3.3V]
+    float read_sensor(int n, int t);    //reads sensor <n> times and returns the average
+};
+
+
+
+#endif
\ No newline at end of file