Diff: AnalogIn.h

Revision:

0:a8fa94490a0a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/AnalogIn.h	Sat Sep 22 10:32:07 2012 +0000
@@ -0,0 +1,99 @@
+/* mbed Microcontroller Library - AnalogIn
+ * Copyright (c) 2006-2011 ARM Limited. All rights reserved.
+ */ 
+
+#ifndef MBED_ANALOGIN_H
+#define MBED_ANALOGIN_H
+
+#include "device.h"
+
+#if DEVICE_ANALOGIN
+
+#include "platform.h"
+#include "PinNames.h"
+#include "PeripheralNames.h"
+#include "Base.h"
+
+namespace mbed {
+
+/* Class: AnalogIn
+ *  An analog input, used for reading the voltage on a pin 
+ *
+ * Example:
+ * > // Print messages when the AnalogIn is greater than 50%
+ * >
+ * > #include "mbed.h"
+ * >
+ * > AnalogIn temperature(p20);
+ * >
+ * > int main() {
+ * >     while(1) {
+ * >         if(temperature > 0.5) {
+ * >             printf("Too hot! (%f)", temperature.read());             
+ * >         }
+ * >     }
+ * > }
+ */
+class AnalogIn :  public Base {
+
+public:
+
+    /* Constructor: AnalogIn
+     *  Create an AnalogIn, connected to the specified pin
+     *
+     * Variables:
+     *  pin - AnalogIn pin to connect to 
+     *  name - (optional) A string to identify the object
+     */
+	AnalogIn(PinName pin, const char *name = NULL);
+	
+    /* Function: read
+     * Read the input voltage, represented as a float in the range [0.0, 1.0]
+     *
+     * Variables:
+     *  returns - A floating-point value representing the current input voltage,
+     *            measured as a percentage
+     */
+    float read();	
+
+    /* Function: read_u16
+     *  Read the input voltage, represented as an unsigned short in the range [0x0, 0xFFFF]
+     *
+     * Variables:
+     *  returns - 16-bit unsigned short representing the current input voltage,
+     *            normalised to a 16-bit value 
+     */
+    unsigned short read_u16();
+
+#ifdef MBED_OPERATORS
+    /* Function: operator float
+     *  An operator shorthand for <read()>
+     *
+     * The float() operator can be used as a shorthand for <read()> to simplify common code sequences
+     *
+     * Example:
+     * > float x = volume.read();
+     * > float x = volume;
+     * >
+     * > if(volume.read() > 0.25) { ... }
+     * > if(volume > 0.25) { ... }
+     */
+    operator float();
+#endif
+
+#ifdef MBED_RPC
+    virtual const struct rpc_method *get_rpc_methods();
+    static struct rpc_class *get_rpc_class();
+#endif
+
+protected:
+
+    ADCName _adc;
+    
+};
+
+} // namespace mbed
+
+#endif
+
+#endif