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No I2S signal (output) - probably soft issue #8
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Can you run "perl /opt/scripts/device/bone/show-pins.pl" to get the current pin status? What is the video resolution? https://elinux.org/Beagleboard:BeagleBoneBlack_HDMI might be a bit informative. Audio output is only available at certain video resolutions. |
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Hello everyone,
I have a little mystery,
I have a BeagleBone Black Wireless with OS
Linux beaglebone 4.9.45-ti-r57 #1 SMP PREEMPT Fri Aug 25 22:58:38 UTC 2017 armv7l
And when I play sound (48kHz 2 channels 32 signed LE WAV) with aplay I have no signal at all on the pin P9-31 (bitclock) nor P9-29, nor P9-28
I have an oscilloscope, to check this
I managed with this board to use the I2s a few weeks back with aplay and even by sending audio to it via bluetooth, but for a reason i don't know it does not work anymore.
I started up fresh from the official image, and so far i've done this:
aplay -L
and-l
(see ouputs below)All settings seems fine, the pin used are:
SData in 2 <=> P9-pin 28
LRClock in 2 <=> P9-pin 29
BClock in 2 <=> P9-pin 31
GND is on P9-45 but i also tried on P9-1 and P9-2
(pinout below for info)
I expect this cabling to be right as it worked in the past...
Can anyone help me?
I know the I2S output is shared with the screen output, so i though i would not have to reconfigure pins
details
aplay
pactl info
pinout
pin config
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