2008-03-20 17:03:14 Wifi on BF548-ezkit
Nick Moszer (UNITED STATES)
Message: 52857 Hello,
I was wondering if anyone has gotten non-usb wifi to work on a BF548-ezkit or with a BF548/BF549 in general.
I'm currently working on getting an SDIO wifi card to work with this board.
Thanks!
QuoteReplyEditDelete
2008-03-20 17:39:37 Re: Wifi on BF548-ezkit
Mike Frysinger (UNITED STATES)
Message: 52860 in the past we've tested wireless over SPI and CF, but i dont think we've tested over the SD port yet
QuoteReplyEditDelete
2008-03-20 23:00:51 Re: Wifi on BF548-ezkit
hua zhu (CHINA)
Message: 52863
we've tested both connexant and marvell wifi modules on SPI port, but due to the significant SPI DMA bug, DMA can't be used , and data transfer(1.5Mbps) brings too heavy burn on blackfin processor that blocks others tasks. so wifi performance over SPI/SDIO will not be acceptable before this SPI DMA bug removed.
maybe USB 2.0 interface could bring hope.
QuoteReplyEditDelete
2008-03-21 00:16:58 Re: Wifi on BF548-ezkit
Robin Getz (UNITED STATES)
Message: 52865 Hua:
SPI != SDIO
SPI will stink. SDIO should be OK. We are thinking about writing a SPI framework driver for the SPORT (for devices like WiFi) which don't have the same issues as the existing SPI hardware.
-Robin
QuoteReplyEditDelete
2008-03-21 00:36:48 Re: Wifi on BF548-ezkit
hua zhu (CHINA)
Message: 52867
oh, that sounds great if DMA may work up, but could this solve the SPORT clock misallignment problem?
QuoteReplyEditDelete
2008-03-21 03:16:10 Re: Wifi on BF548-ezkit
Kris Dickie (CANADA)
Message: 52872 For the project we are working on, we would also like to use Wifi over SDIO, so I am looking forward to seeing some more developments in this area as well. Thanks.
QuoteReplyEditDelete
2008-03-22 20:17:05 Re: Wifi on BF548-ezkit
Dominik Herwald (GERMANY)
Message: 52930 Using a SPORT for SPI would be just great! =)
I think this would be a very very useful feature for many projects.
Other question:
*If* the mentioned SPI DMA bug would be resolved, would this solve the major
performance problems or is the SPI Hardware too limited in general?
TranslateQuoteReplyEditDelete
2008-03-23 22:30:47 Re: Wifi on BF548-ezkit
Andrew Ray (CHINA)
Message: 52951 SPI DMA can't be used for marvell wifi?I think you make some mistake,it work well for our board(bf536).
QuoteReplyEditDelete
2008-03-24 00:42:09 Re: Wifi on BF548-ezkit
浩 何 (CHINA)
Message: 52952
hi: andrew ray
I am working at plant wifi(driver) to my bf536 board through spi port
but it can't work at all
can you give me a example of how to send message to wifi module and how to read the data on SPI_RDBR
thanks! my e_mail is hehao3344@126.com
thank you!!
TranslateQuoteReplyEditDelete
2008-03-24 07:12:44 Re: Wifi on BF548-ezkit
Robin Getz (UNITED STATES)
Message: 52964 Andrew:
I think it depends...
If you are writing a specific driver for SPI/Wifi or using the standard Linux SPI infrastructure.
If you are writing a mondo blob for SPI/Wifi it may work, but we don't normally do this since it is not scalable.
-Robin
QuoteReplyEditDelete
2008-03-24 07:18:54 Re: Wifi on BF548-ezkit
Dominik Herwald (GERMANY)
Message: 52965 Andrew,
do you use standard Linux SPI Drivers or something different?
Do you have other devices on the same SPI Bus?
Regards,
Dominik
TranslateQuoteReplyEditDelete
2008-03-24 07:21:28 Re: Wifi on BF548-ezkit
Robin Getz (UNITED STATES)
Message: 52966 Dominik:
It is not really a SPI DMA bug - the SPI hardware only supports simplex DMA (Rx or Tx) - many devices want both.
Many devices are sensitive to exactly how many bytes are transfered in/out - it is difficult to control this with the SPI/DMA hardware today.
It really has nothing to do with software.
-Robin
QuoteReplyEditDelete
2008-03-24 07:51:24 Re: Wifi on BF548-ezkit
Dominik Herwald (GERMANY)
Message: 52969 Robin,
OK I see.
Back to SPORT-SPI again:
Do you want to use some method like this:
https://www.analog.com/UploadedFiles/Application_Notes/35189297889832EE_304_Blackfin.pdf
(with TFSx connected to the CS Signal?)
Otherwise there is some external glue logic required to make the SPORT act as SPI, but of course this would be no problem for most applications:
http://www.dsprelated.com/showmessage/15769/1.php
Regards,
Dominik
TranslateQuoteReplyEditDelete
2008-03-24 10:25:06 Re: Wifi on BF548-ezkit
Nick Moszer (UNITED STATES)
Message: 52973 Thanks for all the replies guys..
So far I've pretty much narrowed this down to either an Atheros 6k or a Marvell chip. The Atheros has a driver from the openmoko guys that is still in development. The Marvell chip is supposed to have drivers in the kernel (2.6.24) from (I think) the OLPC project.
When (if) I get something working I'll pass along how it's done.
Thanks!
QuoteReplyEditDelete
2008-03-25 02:20:38 Re: Wifi on BF548-ezkit
Andrew Ray (CHINA)
Message: 52989
Dominik,
I write the own SPI driver, not standard Linux SPI drivers.By the way, I just test the marvell wifi modules for our board, not share the SPI Bus for other devices.
QuoteReplyEditDelete
2008-03-25 03:26:42 回复： Re: Wifi on BF548-ezkit
浩 何 (CHINA)
Message: 52991
hello:
Andrew Ray
my board is bf537 and my wifi module is marvell 8686
please tell my how to probe the wi-fi device and how to read/write the spi
i have word for a long time on this project
my email is hehao3344@126.com please
thank you !!!
TranslateQuoteReplyEditDelete
2008-11-21 00:58:29 Re: 回复： Re: Wifi on BF548-ezkit
Adam Harriman (UNITED STATES)
Message: 65644
This company has a module that was tested at over 12MB/sec.
http://www.sagrad.com/products/802.11/diamondback/
There is an GPL version of the hardware interface that allows custom protocal development or integration into GPL based 802.11 stacks.
There is a licensed version fo the code that was tested on the BF successfully. The host loading was high at max throughput.
The company may still have some adaptor boards available that plug into the back of the BF EVK.
Adam
SG901-1028 Diamondback R7.1 (2).pdf
QuoteReplyEditDelete
2008-12-04 02:26:24 Re: Wifi on BF548-ezkit
dillon hua (CHINA)
Message: 66271
hi he hao:
have you resolve the wifi issue,in our application,we use wifi to transfer video data to outside ,so we just use dma write function
QuoteReplyEditDelete
2008-12-04 05:04:59 Re: Wifi on BF548-ezkit
Yi Li (CHINA)
Message: 66341
Dillon,
We've made update to SPI dma funtions in spi_bf5xx.c in SVN trunk. Maybe you can have a try.
Also we've tested a SDIO/Wifi module on BF548. The SDIO/Wifi driver patch has been checked into SVN trunk at uclinux-dist/bfin_patch/sdio_wifi_patch/. Please follow the README to run the driver. Due to kernel upgrading, the driver cannot work with latest mainline linux kernel for now. But it has been tested on SVN trunk kernel.
-Yi