Pulse1.cpp

00001  
00002 #include "Pulse1.h"
00003 
00004 PulseInOut::PulseInOut(PinName pin):
00005         startval(0), pulsetime(), runtime(), io(pin)    {
00006 }
00007 
00008 
00009 PulseInOut::~PulseInOut() {
00010 }
00011 
00012 void PulseInOut::write(int val) {
00013     io.output();
00014     io = val;
00015 }
00016 
00017 void PulseInOut::write_us(int val, int time)   {
00018     io.output();
00019     io = val;
00020     wait_us(time);
00021     io = !val;
00022 }
00023 
00024 int PulseInOut::read_high_us()  {
00025     pulsetime.reset();
00026     io.input();
00027     while (io == 1) {
00028     }
00029     while (io == 0) {
00030     }
00031     pulsetime.start();
00032     while (io == 1) {
00033     }
00034     pulsetime.stop();
00035     return pulsetime.read_us();
00036 }
00037 
00038 int PulseInOut::read_high_us(int timeout)  {
00039     runtime.reset();
00040     runtime.start();
00041     pulsetime.reset();
00042     io.input();
00043     while (io == 1) {
00044         if (runtime.read_us() > timeout)   return -1;
00045     }
00046     while (io == 0) {
00047         if (runtime.read_us() > timeout)   return -1;
00048     }
00049     pulsetime.start();
00050     while (io == 1) {
00051         if (runtime.read_us() > timeout)   return -1;
00052     }
00053     pulsetime.stop();
00054     return pulsetime.read_us();
00055 }
00056 
00057 int PulseInOut::read_low_us()   {
00058     pulsetime.reset();
00059     io.input();
00060     Temp1.start();
00061     while (io == 0 ) {
00062     }
00063     
00064     while (io == 1) {
00065     }
00066     
00067     pulsetime.start();
00068     while (io == 0) {
00069     }
00070     pulsetime.stop();
00071     return pulsetime.read_us();
00072 }
00073 
00074 int PulseInOut::read_low_us(int timeout)   {
00075     runtime.reset();
00076     runtime.start();
00077     pulsetime.reset();
00078     io.input();
00079     while (io == 0) {
00080         if (runtime.read_us() > timeout)   return -1;
00081     }
00082     while (io == 1) {
00083         if (runtime.read_us() > timeout)   return -1;
00084     }
00085     pulsetime.start();
00086     while (io == 0) {
00087         if (runtime.read_us() > timeout)   return -1;
00088     }
00089     pulsetime.stop();
00090     return pulsetime.read_us();
00091 }
00092 
00093 int PulseInOut::read_us()  {
00094     pulsetime.reset();
00095     io.input();
00096     startval = io;
00097     while (io == startval)   {
00098     }
00099     pulsetime.start();
00100     while (io != startval)  {
00101     }
00102     pulsetime.stop();
00103     return pulsetime.read_us();
00104 }
00105 
00106 int PulseInOut::read_us(int timeout)   {
00107     runtime.reset();
00108     runtime.start();
00109     pulsetime.reset();
00110     io.input();
00111     startval = io;
00112     while (io == startval)  {
00113         if (runtime.read_us() > timeout)   return -1;
00114     }
00115     pulsetime.start();
00116     while (io != startval)   {
00117         if (runtime.read_us() > timeout)   return -1;
00118     }
00119     pulsetime.stop();
00120     return pulsetime.read_us();
00121 }