Diff: Get_IMD/IMD.cpp

Revision:

8:ecf68db484af

Child:

12:e0adb697fcdb

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Get_IMD/IMD.cpp	Fri Oct 10 21:46:52 2014 +0000
@@ -0,0 +1,68 @@
+#include "IMD.h"
+
+CANBuffer *tx_IMD_Buffer;
+
+IMD::IMD(CANBuffer *can): _p(P1_26) {
+    _p.rise(this, &IMD::rise);
+    _p.fall(this, &IMD::fall);
+    _period = 0.0;
+    _pulsewidth = 0.0;
+    
+    tx_IMD_Buffer = can;
+}
+
+void IMD::rise() {
+    _period = _t.read();
+    _t.reset();
+}
+    
+void IMD::fall() {
+    _pulsewidth = _t.read();
+}
+
+float IMD::frequency() { return 1/_period; }
+float IMD::pulse_width() { return _pulsewidth; }
+float IMD::duty() { return _pulsewidth / _period; }
+
+/*
+    Status      State
+    1           Normal
+    2           under voltage
+    3           Insulation measurement: good
+    4           Insulation measurement: bad
+    5           Device error
+    6           Connection fault earth
+*/
+void update_IMD(void const *arg){
+    IMD *instance = (IMD *)arg;
+    char data[4] = {0};
+    while(1){
+        float freq = instance->frequency();
+        float duty = instance->duty();
+        
+        if(freq >= 5 && freq <15){
+            data[0] = 1;   
+        }else if(freq >= 15 && freq < 25){
+            data[0] = 2;   
+        }else if(freq >= 25 && freq < 35){
+            if(duty <= 15){
+                data[0] = 3;
+            } else if(duty > 85 && duty < 100){
+                data[0] = 4;   
+            }   
+        }else if(freq >= 35 && freq < 45){
+            data[0] = 5;   
+        }else if(freq >= 45 && freq < 55){
+            data[0] = 6;
+        }
+        
+        CANMessage txMessage(TX_IMD_ID, data, 4);
+        tx_IMD_Buffer->txWrite(txMessage);
+        
+        Thread::wait(100);  //10 Hz update    
+    }
+}
+
+void IMD::start_update(){
+    Thread update_thread(update_IMD, this);
+}