Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

Ethernet on Bemicro SDK

I'm trying to port the standard net example onto the BeMicroSDK which uses the DP83848C PHY. To keep it simple, I've disabled DHCP and hard-coded a Static IP for now. Everything seems to synth...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

For what it's worth, auto-negotiation does not involve packet transmit/receive. It's a function performed within the PHY, and the NIOS software determines it's success/failure by reading the PHY status registers via the MDIO. Your problem might be something simple like the cable or possibly a bad pin assignment (although if it were a bad pin assignment I'm not sure you would have gotten that far).

Regarding SRAM, I believe the standard ethernet example (and also my BeMicro SDK projects) have onchip SRAM for SGDMA descriptor storage; the packets themselves are in DDR however. If you are following the standard example, you shouldn't have any trouble like memory corruption.