Support for Botic Linux driver

[dwjames]

Hi all, can someone help with the syntax and placement for configuring to use 2 external clocks (45/49) please?
I see I can add the kernel option to the uEnv.txt file on the sd card, so I tried for example adding this to the end of the file

 snd_soc_botic.clk_44k1=45158400

But I'm still playing at double speed...

Also, is there some auto-detect on the mck input for the BBB? It seems that if I am connected to the external clocks via mck, that the Botic driver will always use these, regardless of what I type in the uEnv.txt for snd_soc_botic.ext_masterclk

Also, can someone explain the format for the options where there's a plus?
For example in snd_soc_botic.ext_masterclk where I want to invert the selection and use external clocks, do I write
snd_soc_botic.ext_masterclk=34
?

Thanks,
James

 

[linuxfan]

Regarding clock speed configuration, see post 319
http://www.diyaudio.com/forums/twisted-pear/258254-support-botic-linux-driver-32.html#post4166474

 

[miero]

dwjames: 3+4 is not 34 but 7

you can also verify your settings by printing following files

cat /sys/module/snd_soc_botic/parameters/clk_44k1
cat /sys/module/snd_soc_botic/parameters/clk_48k
cat /sys/module/snd_soc_botic/parameters/ext_masterclk

the last one should be 7 in your case

 

[lintweaker]

@dwjames
To follow up, if needed you can change the clk on the fly:

echo 45158400 | sudo tee /sys/module/snd_soc_botic/parameters/clk_44k1

 

[dwjames]

thanks guys. 3+4 =7 and 'all the config on that 1 line' were the 2 bits of info I was missing.
I only have 1 external clock at the moment, but the 44khz test files play at the right speed now
Almost there....

 

[dwjames]

woo and yay!
all sorted it seems
here's the line from my config uEnv.txt

optargs=coherent_pool=1M snd_soc_botic.ext_masterclk=3 snd_soc_botic.clk_44k1=45158400 snd_soc_botic.clk_48k=49152000

 

[stijn001]

I used that guide some time back - works well. With the Botic distro as a base the install is easier and there is no need for the script to get it to start automatically. This is my cheat-sheet.

Thanks Chris, worked a treat. The only problem is that I now want a high-end dac in every room of the house.

 

[miero]

You should move HW related discussion to appropriate thread...

 

[Dmitry Korneev]

Tell me where to get the signal to switch external generators, the desired frequency range of the external oscillator
There are two different oscillator frequencies as their switching. Where to get the signal

 

[miero]

Dmitry:
P9_24 - D15/7 - uart1_txd (external masterclock switch) - GPIO0_15

 

[Dmitry Korneev]

1 = 24576000
0 = 22579200
This is the way out?
Correctly written?

 

[miero]

(this depends on the kernel option in uEnv.txt)

snd_soc_botic.ext_masterclk=3

or

snd_soc_botic.ext_masterclk=7 ... for inverse clock switch

 

[Q181699]

Issue #3 shutdown problem

Not yet, I'll try to find time for this during the weekend.

Hi Miero,
is there any progress fixing shutdown problem with unmounted network storage? Could you send me a pre-version for test?
Thanks in advance.

 

[Herznn]

TinyMPD solve this problem as follows:
1. share volumes not thru fstab, but thru adding a script (e.g. "sharemount.sh") in bootlocal.sh file.
2. add shutdown script to unmount share before poweroff.

 

[Herznn]

I noticed the problem of the Botic:
MPD does not see more than 124 folders in share disk.
Solving:
uncomment strings at usr/local/etc/mpd.conf file:
follow_outside_symlinks "yes"
follow_inside_symlinks "yes"

 

[Q181699]

Issue #3

I noticed the problem of the Botic:
MPD does not see more than 124 folders in share disk.
Solving:
uncomment strings at usr/local/etc/mpd.conf file:
follow_outside_symlinks "yes"
follow_inside_symlinks "yes"

Hi Herznn,

thanks for quick help. But both lines are uncommented yet!? And I don't have 124 folders in share disk. Any other idea? This is an open forum, Russ got Mieros solution...? Open for commercial usage or open for DIY?

 

[miero]

Herznn: are you mounting disk with symlinked files and directories? I do not understand why allowing symlinks would help otherwise...

Q181699: any news with testing beta?

 

[Herznn]

MPD does work bad with DB when media files immersed structure more than 2-3 hierarchical directories.
I've MacOS jurnaled formatted disk which shared via NFS entirely and havemost hierarchical structure.
And MPD index DB for only 124 folders at summary. I looked as implemented in TynyMPD, that has no this problem. And it works.
Uncomment booth string.

 

[Herznn]

TynyMPD is free and noncommercial project for Intel/AMD-based platform. While noncommercial...

 

[miero]

I'm not going to configure non-secure options for MPD or put malware into distribution...