AudioInjector on Up board

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pbossart
Posts: 1
Joined: Wed Feb 15, 2017 9:20 am

AudioInjector on Up board

Post by pbossart » Wed Feb 15, 2017 9:29 am

When I plug the Hifiberry DAC+ on a Cherrytrail-based Up board (same pinout on the extension connector as RPi model B), I can see the I2C address, no issue

# i2cdetect -y -r 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- 4d -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

When I plug the AudioInjector in the same position, nothing:

# i2cdetect -y -r 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

Is there any special trick I would need to do before reading i2c registers?
Thanks!

flatmax
Posts: 609
Joined: Sat Jul 23, 2016 11:39 pm

Re: AudioInjector on Up board

Post by flatmax » Sat Feb 18, 2017 2:17 pm

hi there,

Never seen i2cdetect before ... hmmm. Not sure what you are trying to accomplish ?

Matt
Check out our audiophile quality crossovers : https://bit.ly/2kb1nzZ
Please review the Zero sound card on Amazon USA : https://www.amazon.com/dp/B075V1VNDD
---
Check out our new forum on github : https://github.com/Audio-Injector

Brian
Posts: 1
Joined: Tue Sep 12, 2017 4:14 am

Re: AudioInjector on Up board

Post by Brian » Tue Sep 12, 2017 4:24 am

Did you ever get this working? How does Raspi know to connect the driver to the i2c port if the chip can't be detected?

flatmax
Posts: 609
Joined: Sat Jul 23, 2016 11:39 pm

Re: AudioInjector on Up board

Post by flatmax » Sat Sep 16, 2017 1:42 pm

The connection are direct lines ... is it possible to test if the static voltage on the lines is 3.3V ?

Matt
Check out our audiophile quality crossovers : https://bit.ly/2kb1nzZ
Please review the Zero sound card on Amazon USA : https://www.amazon.com/dp/B075V1VNDD
---
Check out our new forum on github : https://github.com/Audio-Injector

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