• State Not Answered
  • Locked Locked
  • Replies 10 replies
  • Subscribers 21 subscribers
  • Views 2478 views
  • Users 0 members are here
2025 survey

We are running a survey to help us improve the experience for all of our members. If you see the survey appear, please take the time to tell us about your experience if you can.

Options
Related
How was your experience today?
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

lpc2378 and ethernet dp83848 problem

gayathri k

hi,
i am using a lpc2378 board with the ethernet PHY chip dp83848i,
And also i am using the sample code provided by keil for ethernet transmission..
In that code Tx_only part is working fine...
But in Rx_bouce, the interrupt which is to be generated when a packet is recieved by the lpc2378 from PHY, is not getting generated.And also the voltage of the signal out of PHY is 1.8volts with spikes at a range of 3.3v
In the Tx_only program we got the data out from lpc2378 at 3.3v
Dont know what the problem is!!!! why recieve part is not working!!!!!
Please Some one help me out...
its urgent.. THANKS IN ADVANCE..

Gayathri.K

Parents
  • 0 in reply to gayathri k

    "This may not be possible since we are not sharing these ENET_RXD0 & ENET_RXD1 pins with any other function."

    Maybe not intentionally, but have you made sure that you haven't intentionally missed changing the pin configuration from GPIO to ENET_RXD0/ENET_RXD1?

    The fact is that the signal levels behaves as if you have two outputs colliding. When both outputs wants 3.3V, all is fine. When one output wants 3.3V and the other wants 0V, you will get some voltage in between - a bit depending on how strong the two outputs are.

Reply
  • 0 in reply to gayathri k

    "This may not be possible since we are not sharing these ENET_RXD0 & ENET_RXD1 pins with any other function."

    Maybe not intentionally, but have you made sure that you haven't intentionally missed changing the pin configuration from GPIO to ENET_RXD0/ENET_RXD1?

    The fact is that the signal levels behaves as if you have two outputs colliding. When both outputs wants 3.3V, all is fine. When one output wants 3.3V and the other wants 0V, you will get some voltage in between - a bit depending on how strong the two outputs are.

Children