Pulse1.h

00001 
00002 #ifndef MBED_PULSE1_H
00003 #define MBED_PULSE1_H
00004 
00005 #include "mbed.h"
00006 
00007 /** Pulse Input/Output Class(es)
00008  */
00009  
00010 class PulseInOut   {
00011     public:
00012         /** Create a PulseInOut object connected to the specified pin
00013         * @param pin i/o pin to connect to
00014         */
00015         PulseInOut(PinName);
00016         ~PulseInOut();
00017         /** Set the value of the pin
00018         * @param val Value to set, 0 for LOW, otherwise HIGH
00019         */
00020         void write(int val);
00021         /** Send a pulse of a given value for a specified time
00022         * @param val Value to set, 0 for LOW, otherwise HIGH
00023         * @param time Length of pulse in microseconds
00024         */
00025         void write_us(int val, int time);
00026         /** Return the length of the next HIGH pulse in microsconds
00027         */
00028         int read_high_us();
00029         /** Return the length of the next HIGH pulse in microseconds or -1 if longer than timeout
00030         * @param timeout Time before pulse reading aborts and returns -1, in microseconds
00031         */
00032         int read_high_us(int timeout);
00033         /** Return the length of the next LOW pulse in microsconds
00034         */
00035         int read_low_us();
00036         /** Return the length of the next LOW pulse in microseconds or -1 if longer than timeout
00037         * @param timeout Time before pulse reading aborts and returns -1, in microseconds
00038         */
00039         int read_low_us(int timeout);
00040         /** Return the length of the next pulse in microsconds
00041         */
00042         int read_us();
00043         /** Return the length of the next pulse in microseconds or -1 if longer than timeout
00044         * @param timeout Time before pulse reading aborts and returns -1, in microseconds
00045         */
00046         int read_us(int timeout);
00047     private:
00048         int startval;
00049         Timer pulsetime, runtime;
00050         DigitalInOut io;
00051 };
00052 
00053 #endif