Diff: MAX31855.cpp

Revision:

0:cd9dd4f2c484

Child:

1:aa96d283eead

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MAX31855.cpp	Tue Sep 09 08:17:42 2014 +0000
@@ -0,0 +1,74 @@
+#include "MAX31855.h"
+
+//***********************************/************************************
+//                         Constructors                                 //
+//***********************************/************************************
+MAX31855::MAX31855(PinName mosi, PinName miso, PinName sck, PinName ncs) :_spi(mosi,miso,sck), _ncs(ncs)
+{
+    _ncs = 1;   //CS high
+    _spi.format(16,0);
+    _spi.frequency(1000000);
+}
+
+//***********************************/************************************
+//                                Get Set                               //
+//***********************************/************************************
+bool MAX31855::opened(void)
+{
+    read();
+    return _oc;
+}
+
+bool MAX31855::fault(void)
+{
+    read();
+    return _fault;
+}
+
+bool MAX31855::scToVcc(void)
+{
+    read();
+    return _scv;
+}
+
+bool MAX31855::scToGnd(void)
+{
+    read();
+    return _scg;
+}
+
+
+
+//***********************************/************************************
+//                             Public Methods                           //
+//***********************************/************************************
+float MAX31855::thermocouple(void)
+{
+    read();
+    return _t;
+}
+
+float MAX31855::chip(void)
+{
+    read();
+    return _chip_t;
+}
+    
+//***********************************/************************************
+//                             Protected Methods                        //
+//***********************************/************************************
+void MAX31855::read(void)
+{
+    _ncs = 0;
+    unsigned short high = _spi.write(0);
+    unsigned short  low = _spi.write(0);
+    _ncs = 1;
+    
+    _t = (high>>2)/4.0;
+    _chip_t = (low>>4)/16.0;
+    _fault = high&0x01;
+    _scv = low&0x04;
+    _scg = low&0x02;
+    _oc = low&0x01;
+    
+}
\ No newline at end of file