Re: Crystalfontz LCD display from kernel?

From: Tim Pushor (timp_at_crossthread.com)
Date: 09/24/04

  • Next message: Peter Pentchev: "Re: Kernel-loadable Root Kits" 
    Date: Thu, 23 Sep 2004 17:31:26 -0600
To: "Daniel O'Connor" <doconnor@gsoft.com.au>

    Daniel O'Connor wrote:

    >On Thu, 23 Sep 2004 04:18, Tim Pushor wrote:
    >
    >
    >>My question is, I would really like to be able to display various things
    >>during startup, shutdown, and once shutdown is complete to the LCD. I
    >>assume I would have to modify the kernel for this. I done lots of C
    >>programming, and hardware interface programming in C and assembler, but
    >>never any UNIX kernel programming.
    >>
    >>First of all, is this doable? Also, would it be easier (from the kernel
    >>programming perspective) to do this via USB or Serial?
    >>
    >>
    >
    >Opening a device etc from the kernel would be moderatly painful..
    >It write a userland program which did it first and then port it.
    >
    >
    >
    Daniel,

    Theres' really nothing to port. I just want to output various things at
    different points in the bootup process, and again when the system is
    safe to shut off.

    How painful is it to open/use a device from inside the kernel?

    Thanks,
    Tim

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