Thank you for your reply, was getting worried I wasn't ever going to get anywhere on this Ethernet part of this project.. The lan has a1 thru A7. We assume it's just saving a pin because pin a0 is never high on any of the then address given. The manual has no other info on why there is no a0 pin.
For 32 bit memory interface the address mapping is oneone hence it has not been explicitly mentioned. After reviewing the code I have a few questions. I see this as an example on how to use CS0 vs. Site Search User. Mentions Tags More Cancel. Ask a related question What is a related question? A related question is a question created from another question. When the related question is created, it will be automatically linked to the original question.
Ask a new question Ask a new question Cancel. Tags More Cancel. Share More Cancel. Similar topics. This thread has been locked. Intellectual points. I am trying to config the EMIF. The Ethernet Controller is connected as seen bellow: I have several question: 1. I am looking forward to your answer s. With kindly regards. Hi Werner,. Up 0 Down Cancel.
Hello Vivek, thank you very much for your answer. All data pins stay low : What am I doing wrong? Greetings, Werner. Regards, ViveK Singh. Thank you for any assistance you may be able to offer, Chuck. Hi Walker, We may not exactly have what you are looking for but I am opening this thread and assigning one my colleague to provide any additional on this. Regards, Vivek Singh. That would be great, we're as most projects are under a tight time crunch, and this was dumped in my lap.
What ever info you have will help greatly. Since the emif can be used with multiple type devices, I was hoping there was sample code out there for other type of uses to help get me started In figuring this thing out. I have 1week to let them know if the device they built works or not, I don't have to finish the project, just prove we are able to communicate using udp-protocol from a computer using labview thru this network adapter addon to our main project using the fd chip using our emif port..
Thanks Chuck. Chuck, I'm not the intended colleague, but I'll see if I can help out. Do you have a current schematic that you can share? The original schematic in the thread had errors so it would be good for us to review what you are working with now. Chuck, As Tommy suggested, please update the schematics to get them looked at. Your approach seems proper.
If the address and data lines from x EMIF to the LAN Async 16 bit host bus interface are wired correctly and if you are putting the right address on the bus you should see the value read properly. There could be a protocol that you might have to follow. I haven't read the data sheet completely to understand this but please check if it is direct addressing or if you have to go through a mailbox type of registers where you put address and read data through mailbox registers.
Do you need any right shifts to reach the proper address on the LAN? Also please scope out all the address pins and CS from MCU and see if the address pins are able toggle properly. For ex: you put 0x5A5A and 0xA5A5 on the address and see the pins being set properly.
Hope this helps. Best Regards Santosh Athuru. Attached is the drawing of our connection.. Thanks, Chuck Link to pdf :. Chuck, It looks like you have the same error in the address bus and CS hook-up as the original post. You may want to double-check the LAN signal behavior. Manual for the chip is at bottom if that helps. Chuck, At a minimum, the CSn and address bus signals should be fixed. The Fx address signals are offset by one position for 16b asynchronous memories.
CS0 is also not capable of interfacing with asynchronous memories. Wasn't sure about the cs What can we do to reassign Cs0? Also we are using 32 bit mode not Even in there examples schematics Chuck, There isn't a way to change the CSn assignment except by physical pin routing or by overriding the behavior manually through GPIO control. I only see 16 data bits in the schematic so I assume that it is operating in 16b-word mode.
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