[ECOS] How to integrate two different 16x5x DUART hardware into a application?

[wang cui]

On my target board, I use LPC2220 as processor, there is another Phlips 
16C2550B DUART chip.
In my application, I should make use of 4 UART channels.

As I looked over the serial infrastructure of eCos, I think it is hard to 
use the "16x5x generic serial device drivers" for both chip concurrently.
1. The "ser_16x5x.c" rely on a "CYGDAT_IO_SERIAL_GENERIC_16X5X_INL", and 
this macro has been defined in "ARM LPC2XXX serial device drivers" package. 
How to add 16C2550B's description info to "ser_16x5x.c"?
2. "ser_16x5x.c" use "CYGPRI_IO_SERIAL_GENERIC_16X5X_STEP" macro to reflect 
delta of UART registers. In LPC2XXX, the UART's register step is 4 bytes, 
while on my target board, 16C2550B has been designed with register step 2 
bytes. How to solve this condition?

Thanks.



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