Showroom USI example: parallel port
h.mayer at inode.at
Mon Oct 11 21:58:04 CEST 2004
It works!!! :-)))
For some reason ioperm always fails, but iopl(3); seems to succeed!
I'm not sure what you mean with the following statements:
> In any case you should reread what I told, i.e working with LXRT does
> not mean you cannot do it in kernel space.
Sure, I could do it in kernel space aswell, but I thought the big
advantage of LXRT is to avoid kernel modules and therefore ease development ?
> So if you want to have your parallel port handler in kernel space work
> as usual but do use the LXRT scheduler always.
I'm planning to have my par-port interrupt capture module in kernel space
and a user-space process for reading the data from a FIFO or shared memory
and write that data to disk. (alpha version without writing data to the
disk is already working)
But if I want to do disk I/O I cannot be in hard real time via LXRT, can I ?
Thank you very much!
More information about the Rtai