72 lines
1.3 KiB
C++
72 lines
1.3 KiB
C++
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/*
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* Author: Josh Holtrop
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* Date: 2009-05-03
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* See VFD.h for documentation
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*/
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#include <stdio.h> /* perror() */
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#include <unistd.h> /* usleep() */
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <fcntl.h>
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#include <linux/parport.h>
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#include <linux/ppdev.h>
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#include <iostream>
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using namespace std;
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#include "VFD.h"
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VFD::VFD()
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{
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m_ppfd = -1;
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}
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bool VFD::connect(const std::string & parport)
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{
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const int mode = IEEE1284_MODE_BYTE;
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const int direction = 0;
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if ( (m_ppfd = open(parport.c_str(), O_RDWR)) < 0)
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{
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cerr << "Error opening '" << parport << "'";
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perror("");
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}
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else if (ioctl(m_ppfd, PPCLAIM, NULL))
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{
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perror("Could not claim parallel port");
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}
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else if (ioctl(m_ppfd, PPSETMODE, &mode))
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{
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perror("Could not set parallel port mode");
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ioctl(m_ppfd, PPRELEASE);
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}
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else if (ioctl(m_ppfd, PPDATADIR, &direction))
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{
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perror("Could not set parallel port direction");
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ioctl(m_ppfd, PPRELEASE);
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}
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else
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{
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return true;
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}
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if (m_ppfd >= 0)
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{
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close(m_ppfd);
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m_ppfd = -1;
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}
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return false;
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}
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void VFD::disconnect()
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{
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if (m_ppfd >= 0)
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{
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ioctl(m_ppfd, PPRELEASE);
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close(m_ppfd);
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m_ppfd = -1;
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}
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}
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