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Forum Index : Microcontroller and PC projects : Armmite - STM32H7: Nucleo 144 backpack

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lizby
Guru

Joined: 17/05/2016
Location: United States
Posts: 3309
Posted: 06:13pm 03 Mar 2019
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Thanks--all good now with GUI INTERRUPT.
PicoMite, Armmite F4, SensorKits, MMBasic Hardware, Games, etc. on fruitoftheshed
 
Lappa
Newbie

Joined: 24/03/2019
Location: Australia
Posts: 6
Posted: 09:04am 05 Apr 2019
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Is anyone selling the backpacks in Australia?
Cheers
 
seco61
Senior Member

Joined: 15/06/2011
Location: Australia
Posts: 205
Posted: 02:32am 03 May 2019
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Hi.

I recently ordered 10 PCBs and the components to populate them.
I can probably sell 5 of them... I have 5 of the nucleo H7 boards so will keep 5 backpacks. I can also vouch for JLCPCB - extremely quick turnaround, very cheap and they did not charge me the postage for my first order!

I assembled the first one last night - that is a hell of a lot of soldering!! There must be something like 500 solder joints to make (including the connector on the nucleo board - I did install all of the available connectors on the backpack board).

It worked after I fixed the one solder joint that did not take correctly (the +5V pin on the micro USB connector - they are a bugger to solder!).

Uploaded the latest 5.05.06 firmware with ST-Link with no issues.

I attached a 5" SSD1963 display and a console connection via a USB-serial converter and now I have to port some of my programs to it. But it is all working well (well done Peter). I also put an extra long 3 pin connector on the console port so that I could connect to it from both sides of the PCB - very handy when the display is attached.

Edited by seco61 2019-05-04

Regards

Gerard (vk3cg/vk3grs)
 
matherp
Guru

Joined: 11/12/2012
Location: United Kingdom
Posts: 10064
Posted: 07:10am 03 May 2019
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  Quote  It worked after I fixed the one solder joint that did not take correctly (the +5V pin on the micro USB connector - they are a bugger to solder!).


I tin the PCB and connector, then lots of flux and use the heatgun until the connector settles into the solder, let cool, check connections, then solder the legs. Works for me.

  Quote  I also put an extra long 3 pin connector on the console port so that I could connect to it from both sides of the PCB - very handy when the display is attached.


I use 2 tricks for this. One is to use right angle headers for the console, but the best is to stand the display off using these.

I cut the pins so they sit flush into the existing 40 pin socket on the backpack. Then you can get connectors to all the backpack pins with no issue


Edited by matherp 2019-05-04
 
seco61
Senior Member

Joined: 15/06/2011
Location: Australia
Posts: 205
Posted: 04:54am 06 May 2019
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Hi Peter.

I followed your suggestion and used the extended headers. I did not cut the legs and used 23mm stand-offs (an 8mm and 15mm together using a 15mm and 6mm screw). This gave plenty of room for all the other connections - though I still connect the console cable to the back...

Regards

Gerard

Regards

Gerard (vk3cg/vk3grs)
 
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