[lwip-users] [lwip] Word mode transfers in an ethernet driver

[Dan Lewis]

I'm porting lwIP to a PC104 board that uses the RealTek RTL8019AS
Ethernet controller. The board has the RealTek chip configured for
word-mode transfers. The sample driver transfers data to/from the
Ethernet controller by walking through the pbuf chain and then (within
each pbuf) transfers the pbuf contents to the Ethernet controller one
byte at a time. I'd like to transfer the data one 16-bit word at a time.
Does anyone know whether or not pbufs always contain an even number of
bytes (except possibly the last pbuf in the chain)?

Thanks in advance!

Dan Lewis, Chair
Computer Engineering 
Santa Clara University
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