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Question about writing IO mapped device driver?
- From: "HuangQiang" <jameshq at liverpool dot ac dot uk>
- To: "eCos" <ecos-discuss at sources dot redhat dot com>
- Date: Fri, 14 Dec 2001 08:26:06 -0000
- Subject: [ECOS] Question about writing IO mapped device driver?
Hi all:
I am using ARM E7T, I would like to have some external IO mapped device
like: LCD, Keypad, CAN controller... Is it resonable (worthy of doing so)
to write the device driver for such ext devices? I can control the ext
device via the memory access directly, but I would like to do it in a more
standard way. so I plan to make the device driver. I also knew that quite a
lot deivce driver in eCOS use two layer design, one for logical layer and
one for the physical layer (hardware). I wondered that is there any
available general logical layer device driver for such mapped IO devices? So
I can concentrate on the (hardware ) physical layer device driver. Or any
standard way for the writing the logical layer for the memory mapped IO
devices?
Thanks for your help!
james