which task does the I2C IC U307 about md380tools HOT 5 CLOSED

I became curious about this too. I think it has something to do with the vocoder. The IC is called the HR_V3000S according to the schematic. There is very little information out there about it, sadly. I found lots of other Chinese DMR radios mentioning use of the "DVIS HRV3000" as the vocoder. I presume "DVIS" is a knock-off of DVSI, which makes the real AMBE vocoders. "HR" is the same prefix as the DMR processor IC. It would not surprise me that China has reverse engineered or implemented the AMBE+ spec. I don't think this 6-pin chip is actually the vocoder, but perhaps it's a hardware token/dongle to activate the actual vocoder inside the STM32? I see that the pin map refers to it as a watch dog peripheral, but that doesn't seem to fit in.

Tapping the I2C bus would provide some valuable information. There is also a pack of code called "HR_V3000-vocoder-use" floating around on a bunch of sketchy Chinese download sites that you can find through Google. They make you either pay or upload lots of stuff to get the files. I think it would be very interesting to get a look at whatever that code is.

from md380tools.

from the dr6000 schematic ... alpu-mp ->
http://wenku.baidu.com/view/cb189e29dd36a32d737581aa.html?re=view
http://www.xcjy876.com/html/98y56bz6aa0370za40425y77.html
I can't find an pdf :(

from md380tools.

How to download from wenku.baidu: http://pastebin.com/ynJ9kLdU

Else: http://www.qsl.net/kb9mwr/projects/dv/dmr/ALPU-MP_datasheet_v2.16.pdf

from md380tools.

Tnx

Am 13. Juni 2016 03:24:44 MESZ, schrieb kb9mwr [email protected]:

How to download from wenku.baidu: http://pastebin.com/ynJ9kLdU

Else:
http://www.qsl.net/kb9mwr/projects/dv/dmr/ALPU-MP_datasheet_v2.16.pdf

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now on #168

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