March 2002
Intermediate to advanced
432 pages
9h
English
Content preview from Embedded Linux®: Hardware, Software, and Interfacing
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The Hardware Design Process
The hardware design process can be broken down into eight phases:
Design the external interface hardware.
Find space in the memory map.
Find the CPU configuration register base address.
Configure the memory controller.
Assign the output module enable signal.
Configure the I/O port controller.
Write the helloworldbit testing device driver.
Write the liftmon_snowcon device driver.
Using memory-mapped I/O requires the interface circuit to appear as though it is a static RAM device. The circuit should respond to memory chip selection, write enabling, output enabling, and the bidirectional data bus, and it should perform address decoding. The I/O requirements of six inputs and eight outputs can be implemented by using bytewide ...
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