Reflowed pins again and soldered i2c wires directly to Hermes pads.
Now I have no lock at all.
Beginning to wish I had just left it alone... 😡
Now I have no lock at all.
Beginning to wish I had just left it alone... 😡
Oh well.., but was it necessary to solder directly?
Also, I assume that you confirmed that your buffalo dac was identified as a slave device by the command below on i2c wire connection.
Code:
i2cdetect -y -r 1...
I tried with headers and plugs, but I couldn't be sure that they were making good connections.Oh well.., but was it necessary to solder directly?
Also, I assume that you confirmed that your buffalo dac was identified as a slave device by the command below on i2c wire connection.
...Code:i2cdetect -y -r 1
No, I've never seen that command before! Assume I know nothing about Linux (pretty much true).
I got the following response:
I think I'll give up and reinstall the Volumite. At least I know that works (and my ears are suffering from having to listen to everything at full volume!)
Code:
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --I think I'll give up and reinstall the Volumite. At least I know that works (and my ears are suffering from having to listen to everything at full volume!)
Aha, your dac was not identified as a slave device, the address of which should be shown as 48 somewhere in the listing above.
Did you connect GND line between the dac and BBB? If not, try it if that will work before your ear drums are broken. Otherwise...., take care.
Ha ha. Yes all the lines were connected (to one board, no DVCC to the other just as the Volumite was connected).
I am not familiar with the Buffalo DAC. Are there pull-up resistors on the I2C SDA en SCL lines on the Buffalo DAC side?
I2C on BBB needs pull-ups to work properly.
I don't know, but I can't believe that Russ would design something that didn't work with Buffalo DACs.
Resistance between either SDA or SCL and VCC on my Buffalo II is 2K ohms, a good number for pull-up. So my guess is that added resistance is not required. But one point - easily overlooked - did you dismount the 8 pin control chip from the socket next to the I2C header on Buffalo? I understand that is required.
Frank
I didn't have the firmware chip in the socket on the Buffalo boards, as I'd been using the Volumite.
When I can face going back to it, I'll install headers and make cables with plugs. I'm sure it must be a connection issue.
When I can face going back to it, I'll install headers and make cables with plugs. I'm sure it must be a connection issue.
Hi Brian,
after examination of Hermes-BBB board, I've found Flags header. Those are the pins that should be used to trigger Otto (or any other device), that you've mentioned in the Cronus thread, right?
after examination of Hermes-BBB board, I've found Flags header. Those are the pins that should be used to trigger Otto (or any other device), that you've mentioned in the Cronus thread, right?
Yes - you can use flags header. Just keep in mind they are connected directly to the BBB GPIO pins.
Cheers!
Russ
Cheers!
Russ
Hi,
I have a lipo battery without protection circuit. Is the software/hardware of bbb/hermes equipped with battery protection for overcharging and overdraining?
I have a lipo battery without protection circuit. Is the software/hardware of bbb/hermes equipped with battery protection for overcharging and overdraining?
No, it is designed to utilize the protection integrated into the battery pack (thermal sensing, etc).
It has been talked about elsewhere. Any cell with built in protection circuitry should work fine.
Here is one EBay example: http://www.ebay.com/itm/3-7V-500-mA...Po-062535-for-bluetooth-mp3-mp4-/251918829532
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can anyone advise how much current is pulled from the 5v supply to the BBB and Hermes with a battery connected too? I seem to have undersized my supply by quite some margin.... thanks,
James
James
Too bad 🙁
I guess It would be possible for the bbb to just check the battery voltage for overcharging and draining protection.
The BBB has the capability - just do a little googling. The Hermes-BBB has connections to the required TP pads on the BBB - they are even brought out to header for an NTC and the battery.
Still the protected batteries are so cheap - it seems a little silly not to use them.
Still the protected batteries are so cheap - it seems a little silly not to use them.