Messages in this thread | | | Date | Wed, 5 Mar 2003 07:49:23 +0100 (CET) | From | Peter Svensson <> | Subject | Re: Direct access to parport |
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On Tue, 4 Mar 2003, Eric Lammerts wrote:
> On Tue, 4 Mar 2003, Uwe Reimann wrote: > > I'd like to connect some self made hardware to the parallel port and > > read the values of the dataline using linux. Can this be done in > > userspace or do I have to write kernel code to do so? I'm currently > > thinking of writing a device like lp, which in turn uses the parport > > device. Does this sound like a good idea? > > >From userspace it's quite simple:
[ioperm-based suggestion removed]
A better idea may be to use ppdev - the portable and safe way to access a paralell port directly. This driver is in the stock kernels. This prevents races between the kernel and userland over control for the paralell port.
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