ExioInBuffer.h

00001 /*
00002  * ExioInBuffer.h
00003  *
00004  * Created: 2016.11.05
00005  *
00006  */
00007  
00008 #ifndef _EXIOINBUFFER_H_
00009 #define _EXIOINBUFFER_H_
00010 
00011 #include "mbed.h"
00012 #include "rtos.h"
00013 #include "ExioMcp23s17.h"
00014 
00015 class ExioInBuffer {
00016 public:
00017     ExioInBuffer(ExioMcp23s17* device, ExioPort port) :
00018         _device(device),
00019         _port(port),
00020         _buffer(0x00),
00021         _timer(&ExioInBuffer::threadHelper, osTimerPeriodic, (void *)this)
00022     {
00023         // set the port as input
00024         _device->ioDirection(_port, 0xff);
00025         _device->ioPullup(_port, 0xff);
00026         _device->ioPolarity(_port, 0xff);
00027     }
00028     
00029     uint8_t readPort()
00030     {
00031         return _buffer;
00032     }
00033     
00034     void run(uint32_t millsec)
00035     {
00036         _timer.start(millsec);
00037     }
00038     
00039     void stop()
00040     {
00041         _timer.stop();
00042     }
00043 
00044 protected:
00045     ExioMcp23s17* _device;
00046     ExioPort _port;
00047     uint8_t _buffer;
00048     RtosTimer _timer;
00049     
00050     static void threadHelper(const void* arg)
00051     {
00052         ExioInBuffer* instance = (ExioInBuffer*)arg;
00053         instance->update();
00054     }
00055     
00056     void update() {
00057         _buffer = _device->readPort(_port);
00058     }
00059 };
00060 
00061 #endif //_EXIOINBUFFER_H_