Posted on May 17, 2011 at 09:58Hi all,
I am debugging an app wich receives Ethenet packets via DMA ring buffer. I break early at ENET interrupt, and the problem I am facing is: all DMA RING registers for the actual ring element:
dmaCntl
dmaAddr
dmaNext
dmaPackStatus
are correct, except that dmaPackStatus (which is set by DMA HW) reports a wrong rx packet size. Size should be
u16 size = (u16)( (pDescr->dmaPackStatus & 0x7ff) - 4);
but If I send a get 42 bytes Broadcast packet (logged with Wireshark)
0000 ff ff ff ff ff ff 00 16 36 15 9a 7b 08 06 00 01 ........ 6..{....
0010 08 00 06 04 00 01 00 16 36 15 9a 7b c0 a8 00 63 ........ 6..{...c
0020 00 00 00 00 00 00 c0 a8 00 fe
I receive and indication of 106 bytes received, this is my buffer dump:
FF FF FF FF FF FF 00 16 36 15 9A 7B 08 06 00 01 08 00 06 04 00 01 00 16
36 15 9A 7B C0 A8 00 63 00 00 00 00 00 00 C0 A8 00 FE 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00
VERY strange, cause it seem not to happen with all packets types.
Did anybody had a similar problem ?!?!? I am using ENET library 2.0.
Thanks in advance !
