Hi,
sorry for not introducing myself first - i have a quite delicate Problem with my Phonic Firefly 808 Universal (Firewire/USB) from 2012, which i bought in non working condition and getting Schematics / Service Manuals for this thing, as well as for other devices based on the BridgeCo DM-Series (DM-Series was also utilized by Terratec, M-Audio etc, any Audio Interface which incoorporates Firewire)), looks very impossible -idk why, because this Platform and technology around it is quite outdated.
Well, it was said by the seller that it cannot be recogized by USB any longer, and a close inspection revealed that the D+Trace of the USB Port was "flying" around; no idea how that could happen. Means that i had to make a new connection, which i eventually did. But it looks like as the Firefly "resets" for each two seconds, because the Power light dims down for a short amount of time - before it does that again in a repeated loop.
Oscilloscope shows that the Voltage on the CPU PCB drops for a short period, but not on the serving Main PCB. So hooked up a logic analyzer to something "what seems to be a 4-Pin debug port" - no idea which Format it has, i suppose serial, and it outputs something, but repeatedly for each two seconds.
USB D+ and D- is low all the Time, even with a computer connected, which in conclusion cannot be right. They go straight into the Main DM1500 ASIC, which seems to boot a stripped down Linux Kernel from Flash. Of course there is also no Datasheet of that ASIC anywhere available, because the Company, which bought BridgeCo around a decade ago, closed Business at the very beginning of 2023.
So the question is: Whats happening here. As for my own experience of programming Microcontrollers for +30 Years, it -might- be possible that the integrated USB port of the ASIC changes State from unconfigured to something that does not "quite" like 3.3 / 5 Volts being pulled directly to GND in case of a defect, but i assume that should happen right after power up. And the ASIC itself won´t get hot at all, but seems to run (otherwise i wouldnt get "debug data" out of it, in whatever format it is). A diode Test revels at least no short curcuit between GND and the USB D-Pins.
Any help - and probaly someone which can share additional information about that specific Platform, at best a Service Manual for the Firefly, is very welcome!
Best regards!
sorry for not introducing myself first - i have a quite delicate Problem with my Phonic Firefly 808 Universal (Firewire/USB) from 2012, which i bought in non working condition and getting Schematics / Service Manuals for this thing, as well as for other devices based on the BridgeCo DM-Series (DM-Series was also utilized by Terratec, M-Audio etc, any Audio Interface which incoorporates Firewire)), looks very impossible -idk why, because this Platform and technology around it is quite outdated.
Well, it was said by the seller that it cannot be recogized by USB any longer, and a close inspection revealed that the D+Trace of the USB Port was "flying" around; no idea how that could happen. Means that i had to make a new connection, which i eventually did. But it looks like as the Firefly "resets" for each two seconds, because the Power light dims down for a short amount of time - before it does that again in a repeated loop.
Oscilloscope shows that the Voltage on the CPU PCB drops for a short period, but not on the serving Main PCB. So hooked up a logic analyzer to something "what seems to be a 4-Pin debug port" - no idea which Format it has, i suppose serial, and it outputs something, but repeatedly for each two seconds.
USB D+ and D- is low all the Time, even with a computer connected, which in conclusion cannot be right. They go straight into the Main DM1500 ASIC, which seems to boot a stripped down Linux Kernel from Flash. Of course there is also no Datasheet of that ASIC anywhere available, because the Company, which bought BridgeCo around a decade ago, closed Business at the very beginning of 2023.
So the question is: Whats happening here. As for my own experience of programming Microcontrollers for +30 Years, it -might- be possible that the integrated USB port of the ASIC changes State from unconfigured to something that does not "quite" like 3.3 / 5 Volts being pulled directly to GND in case of a defect, but i assume that should happen right after power up. And the ASIC itself won´t get hot at all, but seems to run (otherwise i wouldnt get "debug data" out of it, in whatever format it is). A diode Test revels at least no short curcuit between GND and the USB D-Pins.
Any help - and probaly someone which can share additional information about that specific Platform, at best a Service Manual for the Firefly, is very welcome!
Best regards!