06-09-2010 12:25 PM
Wow - good work! How did you find out the interface details? Or, is it a trade secret? <G>
I'm looking forward to your thread describing it!
06-10-2010 01:25 AM
After buying my Fuze, I found this forum while looking for better ways to hook it up in the car.
I saw this thread, and I got curious about how the docks communicated, so I bought one.
I think I had my dock for about an hour before I cracked it open and connected the Oscilloscope.
Quite honestly, I don't have much use for a dock in my house. But I want the car hookup to be
just right, and I'm willing to work for it.
Anyway.. the first PIC I used didn't have comparators, so that had a problem reading 3 volt signals
into a 5 volt PIC.. I found an older PIC that has 2 comparators on board, and things were looking good.
I wrote the code, and it worked, but not reliably. After two days of looking for trouble in the code, I
raised the clock speed of the PIC from 8 Mhz to 20.. and suddenly it worked perfect. If it ain't right,
run it faster!
Regarding the "ugly details".. I'm not sure yet how much I'll tell. I think this forum is a really great
resource, and I want to make sure I won't be upsetting our "host" by making the information available.
If any admins want to comment on this, I'd love to hear it!
I was also considering selling a few of these, but it's not lending itself easily to that end. The connector
itself has to be hand-wired. I thought of doing it the way SanDisk did the stock cable, but it turns out that
they used an unusually thin circuit board. Normal FR-4 is too thick to fit between the two rows of pins.
It's certainly a bit more complicated than just a jumper too..
Maybe for now I'll just build mine, and see what happens after it's running. I'll try to get my next parts
order out this week, and might be soldering things together by the middle of next week.
More details will follow.. as I get time to finish this.