Parallel Interface

[Cesar]

Well, yes and no.
The 'problem' with the parallel port is that you can (and usually want to) manipulate individual pins. not just (or nesseseraly) transmit data.

void ParalellPort::setPin(int pin, int value)
{
    int oldValue = getChar(pin);
    if (value != 0) {
        putChar(oldValue | 1 << pin);
    } else {
        putChar(oldValue & (~ (1 << pin)) );
    }
}
 
int ParalellPort::getPin(int pin)
{
    return (getChar() & (1 << pin)) ? 1 ? 0;
}

void ParalellPort::setPin(int pin, int value)
{
    int oldValue = getChar(pin);
    if (value != 0) {
        putChar(oldValue | 1 << pin);
    } else {
        putChar(oldValue & (~ (1 << pin)) );
    }
}

int ParalellPort::getPin(int pin)
{
    return (getChar() & (1 << pin)) ? 1 ? 0;
}

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