2008-05-18 14:12:11     WIFI on Blackfin BF548 - Report and Questions

Document created by Aaronwu Employee on Aug 6, 2013
Version 1Show Document
  • View in full screen mode

2008-05-18 14:12:11     WIFI on Blackfin BF548 - Report and Questions

Tom Hynes (UNITED STATES)

Message: 55993   

 

I am working on a project to put a Blackfin linux imaging system with WIFI on a Micro UAV.

 

www.continentalctrls.com

 

  This is what I have learned about WIFI and Blackfin:

<br style="font-weight: bold;" /> BF548 Rocks

 

   The BF548 is probably the way to go because it supports multiple SDIO ports. SDIO is better than SPI because: (a) 4 bits wide instead of 1, (b) It supports bidirectional DMA (c) There are multiple SDIO ports, so one can be for the WIFI and one for a flash disk, eliminating a serious sharing problem. (d) Robin said

 

SPI != SDIO<br style="font-style: italic;" /> <br style="font-style: italic;" /> SPI will stink. SDIO should be OK<br style="font-style: italic;" />

  The BF537 has an embedded Ethernet mac, which the 548 doesn't, but if you are running an SDIO Ethernet stack it doesn't matter. Also, the Bf537 needs an external PHY, and the BF548 EZ-Kit has a combination, one chip, external MAC and PHY so chip count is same even you want 100BaseT.

 

  I am working on a Cadsoft/Eagle library for the BF548 and EZKit components. If anyone has already done it (or wants a copy of my non guaranteed effort) let me know.

 

  Are there any tricks/issues with BF548 and uclinux?

<br style="font-weight: bold;" /> Marvell Linux for User Group and Embedded Works SDIO WIFI

 

  There is a user group dedicated to linux on the Marvell chip.

 

http://lists.infradead.org/pipermail/libertas-dev/

 

 

This chip is found in multiple modules, such as from www.wi2wi.com and

 

www.embeddedworks.net/wlan/oem_SMD_80211g.html#wlan105

 

     Nick Moszer of Packet Digital is trying to get the above Embedded Works product to work with a BF548 EZKit.  He is running into some problems. Apparently,  the Blackfin 548 SDIO interface has some issues with padding and alignment, and Nick had to modify the driver to send packets with powers of 2 size.

 

Nick is still working on it, and I would really like to see that work because it is small, inexpensive, and they even have an SD card format product.

 

<br style="font-weight: bold;" /> wi2wi.com Marvell Package

 

Another company, www.wi2wi.com , also has a Marvell based package. I have been in contact with the very helpful people there. However, I could find no one working on Blackfin linux.

 

 

connectblue wifi

 

In a previous thread, Antonia Pasini said he was working on it:

 

 

http://blackfin.uclinux.org/gf/project/stamp/forum/?action=ForumBrowse&forum_id=7&_forum_action=ForumMessageBrowse&thread_id=26267

 

 

  There is also supposed to be a dev board with ConnectBlue and Blackfin, but I don't know about uclinux support:

 

 

http://www.analog.com/en/press/0,2890,0%255F36%255F183253,00.html

 

 

  Anyone making progress with ConnectBlue wifi on the Blackfin?

 

<br style="font-weight: bold;" /> Quatech Blackfin Support

 

  http://www.quatech.com/press/Embedded_radios_expansion.php

 

 

  Quatech (DPAC division) has a new product supporting SDIO and the BF548 EZ-Kit. It will be available in a couple of weeks. They say they are working with Analog and it will support uclinux. This implies someone has tested it with a BF548 and uclinux. That would be great. This is a little bigger than the EmbeddedWorks module. Is someone within the community already testing this?

 

 

Atheros Linux

 

  Atheros is another WIFI chipset with linux support. EmbeddedWorks is coming out with a tiny module with a built in antenna connector based on this chipset. Has anyone ported Atheros linux wifi to the Blackfin?

<br style="font-weight: bold;" />

 

QuoteReplyEditDelete

 

 

2008-05-19 10:32:10     Re: WIFI on Blackfin BF548 - Report and Questions

Robin Getz (UNITED STATES)

Message: 56013   

 

Tom:

 

We have not picked up the 802.11 support on the 548 yet - we are working on some other things first.

 

Our first 802.11 will likely be on USB, not SDIO (which would come 2nd).

 

As for the Quatech comment - They may be working with ADI, but I don't have any of their modules, and no one on this side is working on things yet.

 

-Robin

QuoteReplyEditDelete

 

 

2008-05-19 19:50:39     Re: WIFI on Blackfin BF548 - Report and Questions

Kris Dickie (CANADA)

Message: 56021   

 

Along with Tom, I would love to see an 802.11 driver on SDIO, as that is the direction our custom board is headed as well. Looking at the Spectec SDW-823 model (SD-micro).

QuoteReplyEditDelete

 

 

2008-05-20 10:51:02     Re: WIFI on Blackfin BF548 - Report and Questions

Nick Moszer (UNITED STATES)

Message: 56058   

 

W/ regards to Atheros, this post should be helpful:

 

http://lists.openmoko.org/pipermail/openmoko-kernel/2008-March/001758.html

 

 

 

As far as I can tell, he still hasn't posted those drivers to their SVN.

Attachments

    Outcomes