2008-05-03 02:26:01     sport emulate uart

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2008-05-03 02:26:01     sport emulate uart

Dong Bo (CHINA)

Message: 55390   

 

Hi guys

 

i am a newbie of blackfin :-), now i just make a based bf533's board, with 2 Ethernet ports, one SD/MMC, one USB port, and everything working ok.

 

the default bf533 just have one uart port, but for my appliance i need 3 uart ports, so, i am try sport_uart.c program, but always not get it working :-(.

 

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root:~> modprobe bfin_sport_uart

root:~> cat /proc/tty/driver/SPORT-UART

serinfo:1.0 driver revision:

root:~> cat /dev/ttySS0

cat: /dev/ttySS0: No such device or address

root:~> cat /dev/ttySS1

cat: /dev/ttySS1: No such device or address

root:~> lsmod

Module                  Size  Used by

bfin_sport_uart         3828  0

 

root:-> uname -a

 

Linux blue 2.6.19.3-ADI-2007R1.1-svn #1 Fri May 2 21:34:23 CST 2008 blackfin

 

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my board working at 500MHZ with 125MHZ bus,  should i to change bfin_sport_uart.h register define for my board's SCLK ?

 

or any guy have multi uart ports solution for BF533?

 

Thanks

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2008-05-03 04:36:44     Re: sport emulate uart

Mike Frysinger (UNITED STATES)

Message: 55410   

 

if you're a newbie, it means you're just getting started, so why are you using 2007R1.1 ?  you should be using the 2008R1 release.

 

there is no board-specific information in the header file you mentioned, so i dont understand what exactly you'd be changing

 

if the device node is not being created automatically, you have a problem in the kernel.  please consult the documentation:

http://docs.blackfin.uclinux.org/doku.php?id=uclinux-dist:dev-management#troubleshooting

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2008-05-03 07:12:03     Re: sport emulate uart

Dong Bo (CHINA)

Message: 55416   

 

thanks for your reply, my appliance program working on 2007r1, but i will try forward to 2008r1.

 

and another question for hardware, before i try that program, should i follow http://docs.blackfin.uclinux.org/doku.php?id=sport_uart to short the RFSx and DRx? or i can directly try that program(not short the RFSx and DRx)?

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2008-05-03 07:38:49     Re: sport emulate uart

Mike Frysinger (UNITED STATES)

Message: 55419   

 

presumably the short isnt there just for fun, but i'm not a hardware guy so i cant say for sure

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2008-05-03 07:48:14     Re: sport emulate uart

Dong Bo (CHINA)

Message: 55422   

 

thanks Mike.

 

does any guys have some experience on that, thank you ;-)

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2008-05-03 14:32:36     Re: sport emulate uart

Terry Markovich (UNITED STATES)

Message: 55426   

 

The RFSx pin must be connected to the DRx pin, see app note EE-191 for more info.

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2008-05-04 09:01:13     Re: sport emulate uart

Robin Getz (UNITED STATES)

Message: 55463   

 

Dong:

 

Mike & Terry are correct - the schematics and directions are not in the wiki for fun  - if you don't do it that way, and it doesn't work, don't complain here

 

As Terry indicated - the EE note that this is based from is also referenced in the wiki - it has a little more detail than we do.

 

Robin

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