From f23fc25976ac5218ee6e8801685300db7b1b0bd1 Mon Sep 17 00:00:00 2001 From: Bdale Garbee Date: Fri, 2 Jun 2023 12:25:47 -0600 Subject: [PATCH] add notes about TeleMini USB to FAQ list --- FAQs/telemini_v3_usb.mdwn | 41 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 FAQs/telemini_v3_usb.mdwn diff --git a/FAQs/telemini_v3_usb.mdwn b/FAQs/telemini_v3_usb.mdwn new file mode 100644 index 0000000..02aabfe --- /dev/null +++ b/FAQs/telemini_v3_usb.mdwn @@ -0,0 +1,41 @@ +# Can I configure and/or update the firmware on a TeleMini v3.0 board over USB? + +Conceptually, it's easy. In practice, it's really fiddly, because what you +have to play with are 3 small holes in the board on 0.050 inch centers. + +Leaving the micro USB connector off is one of the ways we made TeleMini +fit in an 18mm tube. But the main system on chip has USB available +still, so when he laid out the board, Keith brought the required pins +out, thinking it might be helpful in debugging or something, and our +software should know what to do if it sees a TeleMini show up on USB. + +On one edge of the board, there are 6 holes in a +row, one of which has a square pad, though you really have to squint at +it to see which pad that is. It's the third pad in from one end, and +has 2 round holes on one side and 3 on the other. The side with two is +what you care about... they are the USB plus and minus data lines. 3 +connections will do it, GND / D+ / D-. + +To actually connect to these holes, the quickest hack is probably to +take some existing USB A to mini or micro B cable, cut the B connector +off, then carefully strip the outer jacket, strip the conductors, twist +and tin their stranded leads, and just stick them into the appropriate +holes. Note that the usual color code for such cables is black for +ground, red for 5V (avoid like the plague getting that near our +boards!), green and white for the data lines. On the cables we buy for +TeleDongle, et al, green is D+ and white is D-, but sadly not everyone +seems to get that right who sells cheap cables. I've never seen anyone +mess up the red and black wires. Fortunately, if you get the data lines +reversed, it won't hurt anything, it just won't work. + +It's going to be a bit of a challenge to keep everything making contact +long enough to talk to the board. You might consider finding some +50-mil pitch header pins to solder the wires to so you have a single +thing you're putting in and out of the holes. Or maybe some micro +grabbers on each wire? If you come up with some great solution, please +let us know so we can share the information. + +In any case, once you have the USB port wired up, with a battery and +power switch hooked up to the board it should show up as a USB device on +your computer and you should be able to use altosui to configure it and +update the firmware just like any of our other products. -- 2.47.2