Re: [ts-7000] 7260 SPI C Programming Example

[Peter Gammie <>]

On Fri, Jul 30, 2010 at 8:11 PM, Breton M. Saunders <> wrote:

It isn't the code style that worries me.

It is the myth that one can write a reliable driver (real-time or not) as a user mode program that concerns me greatly.

There is a reason why real drivers run inside the kernel, and do not use peekpoke.h!

I'll mildly disagree with this - using Linux 2.6.33.x and the -RT patches and high-res timers, I have a rock-solid flicker-free multiplexed display hanging off the LCD port of a ts7250, being driven from entirely user space, using mmap'd I/O. By "rock solid" I mean while playing mp3s, dropbear sessions, etc. The scheduling overhead is a bit of a killer, I grant...

... but I have to wonder if the OP can use the kernel's SPI drivers... it is not hard to get a recent kernel working on the ts72xx boards, just consult the archives.

cheers

peter

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