Added all useful libraires

lib/MAX6675/max6675.h

@@ -0,0 +1,49 @@
+#ifndef max6675_h
+#define max6675_h
+
+#include "mbed.h"
+
+/*
+#include "mbed.h"
+#include "max6675.h"
+
+max6675 sensor(D5,D3,D6);  //miso, sclk, cs
+Serial pc(USBTX,USBRX);
+
+int main()
+{
+    pc.baud(921600);
+    pc.printf("\033[0m\033[2J\033[HMAX6675 Thermocouple!\r\n\n\n");
+
+    int cf = 0; // 0 Centigrade, 1 Fahrenheit
+
+    while (1) {
+
+        float temp = sensor.gettemp(cf);
+        if (cf) {
+            printf(" Temp: %4.2f%cF \n\033[2K\033[1A",temp,176);
+        } else {
+            printf(" Temp: %4.2f%cC \n\033[2K\033[1A",temp,176);
+        }
+        wait_ms(250);   // requires 250mS for temperature conversion process
+    }
+}
+*/
+
+
+class max6675
+{    
+  public:
+  
+    max6675(PinName miso, PinName sclk, PinName cs);
+        
+    // read temperature 0 Centigrade, 1 Fahrenheit       
+    float gettemp(int cf);    
+    
+  private:  
+    SPI max;
+    DigitalOut _cs;
+    Timer t;    
+};
+
+#endif