SCC character recognition/DMA

All,

I have an Embedded Planet with a LITE_DW Motorola 823 PPC
using a HIOX interface board.

Has anyone attempted to utilize the character-recognition
feature of the SCC ports with any success?

Also, I have been researching the uart.c and related files but I
don't see if DMA is used to shuttle data to/from the serial
ports. Has that been attempted?

Regards,
     Michael Pergola
     Software Engineer
     Danfoss Air-Conditioning & Refrigeration Division
     7941 Corporate Blvd.
     Baltimore, MD  21236     (410) 931-8250 x4259


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"Pergola, Michael" wrote:

Has anyone attempted to utilize the character-recognition
feature of the SCC ports with any success?

Yes, it does work, just make sure you have an SCC to use (there
is only one on the 823, which is typically wired for Ethernet).

...... but I
don't see if DMA is used to shuttle data to/from the serial
ports. Has that been attempted?

The DMA must be used.  It is the only way the CPM moves data to/from
the devices.  There is no programmed I/O to 8xx peripherals except
the GPIO pins.


	-- Dan

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