ExioMcp23s17DigitalIn.h

00001 /*
00002  * ExioMcp23s17DigitalIn.h
00003  *
00004  * Created: 2016.10.30
00005  *
00006  */
00007  
00008 #ifndef _EXIOMCP2317SDIGITALIN_H_
00009 #define _EXIOMCP2317SDIGITALIN_H_
00010 
00011 #include "mbed.h"
00012 #include "ExioMcp23s17.h"
00013 
00014 class ExioMcp23s17DigitalIn {
00015 public:
00016     ExioMcp23s17DigitalIn(ExioMcp23s17* _pDevice, ExioPort _port, int _pin) : 
00017         pDevice(_pDevice),
00018         port(_port),
00019         pin(_pin)
00020     {
00021         // set as input
00022         uint8_t tmp = pDevice->ioDirection(port);
00023         pDevice->ioDirection(port, tmp | (1 << pin));
00024     }
00025     
00026     void mode(PinMode pull)
00027     {
00028         uint8_t tmp = pDevice->ioPullup(port);
00029         switch (pull) {
00030         case PullUp:
00031             pDevice->ioPullup(port, tmp | (1 << pin));
00032             break;
00033         case PullNone:
00034             pDevice->ioPullup(port, tmp & ~(1 << pin));
00035             break;
00036         default:
00037             error("PinMode must be PullUp or PullNone");
00038         }
00039     }
00040     
00041     int read()
00042     {
00043         uint8_t data = pDevice->readPort(port);
00044         int bv = data & (1 << pin);
00045         return bv ? 1 : 0;
00046     }
00047     
00048 protected:
00049     ExioMcp23s17* pDevice;
00050     ExioPort port;
00051     int pin;
00052 };
00053 
00054 #endif //_EXIOMCP2317SDIGITALIN_H_