Date: Thu, 23 Sep 2004 17:31:26 -0600 From: Tim Pushor <timp@crossthread.com> To: "Daniel O'Connor" <doconnor@gsoft.com.au> Cc: freebsd-hackers@freebsd.org Subject: Re: Crystalfontz LCD display from kernel? Message-ID: <41535CCE.8070503@crossthread.com> In-Reply-To: <200409232201.30201.doconnor@gsoft.com.au> References: <4151C8F6.5060905@crossthread.com> <200409232201.30201.doconnor@gsoft.com.au>
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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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