Wolfgang Denk wrote:
According to README,only RBC823 does have a custom keyboard so far.I looked up
This is wrong.
Many systems have a custom keyboard of one kind or another. See for example LWMON and R360 and TRAB, which allow to bind arbitrary command sequences to arbitrary key combinations.
Or see HMI-10 which uses a custom PS/2 multiplexor to attach a standard PC keuyboard as input device.
Thanks for your detailed points.I knew LWMON with a i2c keyboard driver from your post.BTW,which file is this LWMON keyboard driver in ELDK3.0 kernel code?As for others,I would like to have a look at them.
What are you going to use the "keyboard" for? To detect single key presses and to switch functions in U-Boot, like truning on/off of log,messages, booting a different image and the like? Or as input device for interactive use?
For interactive use.We have a special keyboard with 80 keys or so.We plan to code the driver in LINUX.But if implentmented in u-boot as well,it would be perfect.
It makes little sense to use a configuration for one board on completely different hardware. You need a detailed understanding of that hardware,
I have no RBC823 hardware scheme but wanted to do like that to test some possibilities.I really cannot understand RBC823 init process of its keyboard.
and of your own, and in nearly all cases you will have to adapt the code. Simpy copying a connfiguration is a pretty good guarantee to run you into problems.
I know my hardware more than the driver I am programming.Coding a custom driver is a big challenge to me.Anyway,I just editted some drivers before.I hope to find a good example to follow.
Thanks for your kind help!
Sam
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