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As for the empty data packet, it can come from the CPU data cache. Try to flush the data cache before sending the packet, or use the alt_remap_uncached() function to modify your pointer to the memory buffer that you fill in.
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I tried to use uncashed but the result is the same.
8 Frame 69 (126 bytes on wire, 126 bytes captured) Arrival Time: Nov 24, 2009 13:50:20.538005000
Frame Number: 69 Frame Length: 126 bytes capture Length: 126 bytes
0
Ethernet II, src: 00:07:ab:f0:Od:ba (00:07:ab:f0:Od:ba),
Dst: 00:00:00_00:00:00 (00:00:00:00:00:00) S
Destination: 00:00:00_00:00:00 (00:00:00:00:00:00)
Address: 00:00:00_00:00:00 (00:00:00:00:00:00)
0 = IG bit: individual address (unicast)
0 = LG bit: Globally unique address (factory default)
Ј В
mds Header(unknown(0)/unknown(0)) В
mds Header
...0 0000 0000 0000 = Packet Len: 0
0000 0000 00.. = Dst index: 0x0000
00 0000 0000 = src index: 0x0000
0000 0000 0000 = VSAN: 0
В mds Trailer
eof: unknown (0) CRC: 0x00000000
Where can I have a look of configuring of SGDMA and how to бфлу a descriptor for daata memory to transmit?
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