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[Gumstix-users] MIDI and verdex pro

From: Darren Gibbs <tsquank@ya...> - 2008-11-30 20:22

Howdy,

Way back when (2.6.11 days) I built an image for a basix that does  
MIDI and some audio analysis for a low-volume product.  I haven't  
needed to change anything for quite a while so I haven't been closely  
tracking all of the software changes and the switch to OE.  Now that  
the basix is being EOLed, I need to bring up my app on a verdex pro.

To do MIDI (~31250bps) on the basix's FF and HW UARTS I had to modify  
pxa.c to allow custom baud rates, turn off AFE on HWUART, and re-build  
the kernel.

Then I could set up the port like this:

setserial /dev/ttyS3 divisor 29 spd_cust
stty -F /dev/ttyS3 speed 38400

and also enable the HWUART:

modprobe proc_gpio
echo AF1 out > /proc/gpio/GPIO48
echo AF1 in > /proc/gpio/GPIO49
echo AF1 in > /proc/gpio/GPIO50
echo AF1 out > /proc/gpio/GPIO51
for i in 42 43 44 45;do echo GPIO in > /proc/gpio/GPIO$i;done

Anyone know if these steps are still necessary in the newer kernel  
builds for the verdex pro?  It would be great to be able to use a  
stock kernel if I can!

I've been searching the gumstix site and using google but have had a  
hard time finding even simple info like which UARTs are available on  
the audiostix2.  Not even mentioned on the store's product page?!

Based on this picture:
http://pubs.gumstix.org/boards/AUDIOSTIX/PCB00012-R791/PCB00012-R791.bot.png
it seems that all 4 UARTS are brought out on audiostix2?

Is this the most current info on how the verdex pro's ports are used?
http://www.gumstix.net/Hardware/view/Expansion-boards/Basix-Connex-Verdex/Verdex-Pro-UARTs/112.html

It says that the BTUART is not exposed, but it seems the lines appear  
on the audiostix2.

Is it possible to get to the serial console on FFUART with a tweener,  
and then have MIDI on ST and BT UARTs on the audiostix?

Thanks for any pointers/info,

Darren

Thread View

Thread	Author	Date
[Gumstix-users] MIDI and verdex pro	Darren Gibbs <tsquank@ya...>

Re: [Gumstix-users] MIDI and verdex pro

From: Dave Hylands <dhylands@gm...> - 2008-12-01 05:51

Hi Darren,

> I've been searching the gumstix site and using google but have had a
> hard time finding even simple info like which UARTs are available on
> the audiostix2.  Not even mentioned on the store's product page?!
>
> Based on this picture:
> http://pubs.gumstix.org/boards/AUDIOSTIX/PCB00012-R791/PCB00012-R791.bot.png
> it seems that all 4 UARTS are brought out on audiostix2?

The audiostix2 exports all 4 UARTs, but only the PXA255 (i.e. basix
and connex) have 4 UARTs.

The verdex, and verdex pro (PXA270 based) only have 3 UARTs.

> Is this the most current info on how the verdex pro's ports are used?
> http://www.gumstix.net/Hardware/view/Expansion-boards/Basix-Connex-Verdex/Verdex-Pro-UARTs/112.html

So that information seems quite confusing to me, since the PXA270 only
doesn't have the HWUART port.

> It says that the BTUART is not exposed, but it seems the lines appear
> on the audiostix2.

You need to compare the 60-pin pinout for the basix/connex and the verdex:
<http://www.gumstix.net/Hardware/view/Hardware-Feature-Overview-Sheets/Verdex-Pro-Verdex-Connex-Basix-60-pin-connector/112.html>

and remember that the audiostix2 works with both.

> Is it possible to get to the serial console on FFUART with a tweener,
> and then have MIDI on ST and BT UARTs on the audiostix?

Yeah - you could also get the FFUART from the audiostix - you just
need a serial adapter. Using the Tweener makes the stack pretty
unstable, but it should work fine.

-- 
Dave Hylands
Shuswap, BC, Canada
http://www.DaveHylands.com/

Re: [Gumstix-users] MIDI and verdex pro

From: Darren Gibbs <tsquank@ya...> - 2008-12-01 18:12

thanks Dave!

On Nov 30, 2008, at 9:51 PM, Dave Hylands wrote:

> Hi Darren,
>
>> I've been searching the gumstix site and using google but have had a
>> hard time finding even simple info like which UARTs are available on
>> the audiostix2.  Not even mentioned on the store's product page?!
>>
>> Based on this picture:
>> http://pubs.gumstix.org/boards/AUDIOSTIX/PCB00012-R791/PCB00012-R791.bot.png
>> it seems that all 4 UARTS are brought out on audiostix2?
>
> The audiostix2 exports all 4 UARTs, but only the PXA255 (i.e. basix
> and connex) have 4 UARTs.
>
> The verdex, and verdex pro (PXA270 based) only have 3 UARTs.
>
>> Is this the most current info on how the verdex pro's ports are used?
>> http://www.gumstix.net/Hardware/view/Expansion-boards/Basix-Connex-Verdex/Verdex-Pro-UARTs/112.html
>
> So that information seems quite confusing to me, since the PXA270 only
> doesn't have the HWUART port.
>
>> It says that the BTUART is not exposed, but it seems the lines appear
>> on the audiostix2.
>
> You need to compare the 60-pin pinout for the basix/connex and the  
> verdex:
> <http://www.gumstix.net/Hardware/view/Hardware-Feature-Overview-Sheets/Verdex-Pro-Verdex-Connex-Basix-60-pin-connector/112.html 
> >
>
> and remember that the audiostix2 works with both.
>
>> Is it possible to get to the serial console on FFUART with a tweener,
>> and then have MIDI on ST and BT UARTs on the audiostix?
>
> Yeah - you could also get the FFUART from the audiostix - you just
> need a serial adapter. Using the Tweener makes the stack pretty
> unstable, but it should work fine.