UHS2_gpio.cpp

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/* Copyright (C) 2011 Circuits At Home, LTD. All rights reserved.
 
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
 
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
 
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
Contact information
-------------------
 
Circuits At Home, LTD
Web      :  http://www.circuitsathome.com
e-mail   :  support@circuitsathome.com
 
UHS2_GPIO implements "wiring" style GPIO access. Implemented by Brian Walton brian@riban.co.uk
 */
 
#include "UHS2_gpio.h"
 
UHS2_GPIO::UHS2_GPIO(USB *pUsb) : m_pUsb(pUsb)
{
}
 
void UHS2_GPIO::digitalWrite(uint8_t pin, uint8_t val) {
        if(pin > 7)
                return;
        uint8_t nValue = m_pUsb->gpioRdOutput();
        uint8_t nMask = 1 << pin;
        nValue &= (~nMask);
        if(val)
                nValue |= (nMask);
        m_pUsb->gpioWr(nValue);
}
 
int UHS2_GPIO::digitalRead(uint8_t pin) {
        if(pin > 7)
                return -1;
        uint8_t nMask = 1 << pin;
        uint8_t nValue = m_pUsb->gpioRd();
        return ((nValue & nMask)?1:0);
}
 
int UHS2_GPIO::digitalReadOutput(uint8_t pin) {
        if(pin > 7)
                return -1;
        uint8_t nMask = 1 << pin;
        uint8_t nValue = m_pUsb->gpioRdOutput();
        return ((nValue & nMask)?1:0);
}