On Thursday, July 2, 2015 at 10:55:40 AM UTC-6, J Evans wrote:
>
> > I ran all steps as given by the instructions
> > (http://elinux.org/CircuitCo:Audio_Cape_RevB) including installing a
> new DT overlay, disabling HDMI and adding to the slots file.
>
> >Then I try speaker-test -D default:EVM and put an oscilloscope on pin
> >P9_28. No waveform comes out. This should be the I2S serial output, but
> it's just a flat line. I have no idea how to debug this.
>
> What do you get if you check pinctrl? Are things set up as expected?
>
> sudo cat /sys/kernel/debug/pinctrl/44e10800.pinmux/pinmux-pins
>
>
> Seems like it:
Relevant pins:
>From dts:
pinctrl-single,pins = <
0x1ac 0x00 /* mcasp0_ahclkx,
MODE0 | INPUT */
0x19c 0x22 /*
mcasp0_ahclkr, */
0x194 0x20 /* mcasp0_fsx,
MODE0 | OUTPUT */
0x190 0x20 /*
mcasp0_aclkr.mcasp0_aclkx, MODE0 | OUTPUT_PULLDOWN */
0x198 0x20
>;
>From pinmux-pins (in same order as above):
pin 107 (44e109ac): 48038000.mcasp (GPIO UNCLAIMED) function
pinmux_bone_audio_cape_audio_pins group pinmux_bone_audio_cape_audio_pins
pin 103 (44e1099c): 48038000.mcasp (GPIO UNCLAIMED) function
pinmux_bone_audio_cape_audio_pins group pinmux_bone_audio_cape_audio_pins
pin 101 (44e10994): 48038000.mcasp (GPIO UNCLAIMED) function
pinmux_bone_audio_cape_audio_pins group pinmux_bone_audio_cape_audio_pins
pin 100 (44e10990): 48038000.mcasp (GPIO UNCLAIMED) function
pinmux_bone_audio_cape_audio_pins group pinmux_bone_audio_cape_audio_pins
pin 102 (44e10998): 48038000.mcasp (GPIO UNCLAIMED) function
pinmux_bone_audio_cape_audio_pins group pinmux_bone_audio_cape_audio_pins
And in /sys/kernel/debug/pinctrl/44e10800.pinmux/pinmux-pins all the modes
are as they should be from the .dts, except offset 0x198 has 0x70 instead
of the given 0x20 mode from the .dts file.
I have tried this on two separate BBB's with identical results.
root@beaglebone:~# cat /sys/devices/bone_capemgr.9/slots
0: 54:PF---
1: 55:PF---
2: 56:PF---
3: 57:PF---
4: ff:P-O-L Bone-LT-eMMC-2G,00A0,Texas Instrument,BB-BONE-EMMC-2G
5: ff:P-O-- Bone-Black-HDMI,00A0,Texas Instrument,BB-BONELT-HDMI
6: ff:P-O-- Bone-Black-HDMIN,00A0,Texas Instrument,BB-BONELT-HDMIN
7: ff:P-O-L Override Board Name,00A0,Override Manuf,BB-BONE-AUDI-02
--
For more options, visit http://beagleboard.org/discuss
---
You received this message because you are subscribed to the Google Groups
"BeagleBoard" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
For more options, visit https://groups.google.com/d/optout.
