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Code: Alles auswählen

#!/usr/bin/env python
# -*- coding: iso-8859-15 -*-

def main():
    try:
        prn = open("/dev/usb/lp0", 'wb')
        # Initialize
        prn.write("\x1B\x40")

        # Cut paper
        prn.write("\x1D\x56\00")
        prn.close()
    except IOError:
        print "Drucker ist nicht schreibbar"

if __name__ == "__main__":
    main()

Code: Alles auswählen

    const char prnInit[] = {0x1B, 0x40};
    const char prnLineFeed[] = {0x0A};
    const char prnCutPaper[] = {0x1D, 0x56, 0x00};
    QFile prnDev("/dev/usb/lp0");

    if (!prnDev.open(QIODevice::WriteOnly)) {
        m_ui->labelMessage->setText(m_ui->labelMessage->text() + "Can't write to printer device\n");
        return;
    }
    prnDev.write(prnInit);
    prnDev.write(prnCutPaper);
    prnDev.close();

Code: Alles auswählen

QFile file( "/dev/lp0" );
if( !file.open(QIODevice::WriteOnly) )
{
    return;
}
file.write( QByteArray::fromHex("1B40") ); //init printer
//die Hex-Werte werden nicht in \x1B sondern in 1B direkt angegeben
//weitere Kommandos
file.flush();
file.close();