IORD issue

Nios® V/II Embedded Design Suite (EDS)

Support for Embedded Development Tools, Processors (SoCs and Nios® V/II processor), Embedded Development Suites (EDSs), Boot and Configuration, Operating Systems, C and C++

IORD issue

1,004 Views

Hey,

I'm trying to receive packets from a PC using a modified version the DE2_NET program. I can receive a packet, but it doesn't read the length correctly. Furthermore, when I hard-code the length (say, to 64), I can view the packet received, but although it resembles the packet sent, there are inconsistencies. Example: The destination and source MAC addresses come through as follows:

Sent: 01 60 6E 11 02 0F 00 11 11 13 3E F4

Received: 01 60 06 11 02 0F 04 11 01 13 60 F4

I traced the problem into DM9000A.c --> ReceivePacket( ) and found that those are the values obtained from the call IORD(DM9000A_BASE, IO_data). What's going on here?

Also: the program had been receiving packets with the correct data until I replaced the DE2 board. Could this problem (integrity of packet data) be affected by some damaged part of a seemingly functional DE2 board?

Link Copied

0 Replies

Community support is provided Monday to Friday. Other contact methods are available here.

Intel does not verify all solutions, including but not limited to any file transfers that may appear in this community. Accordingly, Intel disclaims all express and implied warranties, including without limitation, the implied warranties of merchantability, fitness for a particular purpose, and non-infringement, as well as any warranty arising from course of performance, course of dealing, or usage in trade.

For more complete information about compiler optimizations, see our Optimization Notice.