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Tinine Guru Joined: 30/03/2016 Location: United KingdomPosts: 1646
Posted: 06:12am 15 Oct 2018
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Over a year ago, I acquired a couple of E-100s and I populated both Click sockets. One was an RS232 module and the other was the LS7366 quadrature encoder interface (SPI).
I remember having trouble getting something working and was about to consult this community when I came across another post that mentioned linking a couple of pads on the bottom of the board. I did this and my problem went away. I still don't see any mention of these pads on Geoff's site.
Can anyone please remind me of what they are... something to do with routing Rx and TX, maybe?
Grogster Admin Group Joined: 31/12/2012 Location: New ZealandPosts: 9753
Posted: 06:19am 15 Oct 2018
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I assume you mean these pads:
When the E100 was designed, there was no clarity on exactly which way the serial connection was. IE: On the Click modules, was TX in or out?
To cover this, we put the little pads to allow you to reverse the serial TXD and RXD if that ever proved to be necessary.
The silkscreen shows the way we(Geoff and I) thought it should be, but you could solder-blob the middle and other pads to reverse the serial connections.
This does not seem to have been necessary, as it would appear our original interpretation was correct, and normally, all you need to do, is solder-blob to the two pads as indicated to route the serial port to the CLICK sockets.Smoke makes things work. When the smoke gets out, it stops!
Tinine Guru Joined: 30/03/2016 Location: United KingdomPosts: 1646
Posted: 07:04am 15 Oct 2018
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Yeah,that was it... many thanks
Grogster Admin Group Joined: 31/12/2012 Location: New ZealandPosts: 9753
Posted: 07:06am 15 Oct 2018
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I recognise that username. You were on the PICAXE forums, were you not?Smoke makes things work. When the smoke gets out, it stops!
CaptainBoing Guru Joined: 07/09/2016 Location: United KingdomPosts: 2171
Posted: 08:31am 15 Oct 2018
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That's why I like MOSI & MISO
Grogster Admin Group Joined: 31/12/2012 Location: New ZealandPosts: 9753
Posted: 09:05am 15 Oct 2018
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Indeed.
EDIT: But having said that, even now - twenty years after I first became aware of asynchronous serial, I am STILL getting confused by TXD and RXD.
TXD with respect to......which end was it now???? (rhetorical)Edited by Grogster 2018-10-16Smoke makes things work. When the smoke gets out, it stops!
Tinine Guru Joined: 30/03/2016 Location: United KingdomPosts: 1646
Posted: 10:05am 15 Oct 2018
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Yikes... I had a PICAXE about seven years ago but couldn't get excited about it. I don't remember being a forum member but probably was because there are always questions... That would be one heck of a memory if so
CaptainBoing Guru Joined: 07/09/2016 Location: United KingdomPosts: 2171
Posted: 10:11am 15 Oct 2018
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zackly.
I use a 3.5mm stereo jack to connect to the console on all MMs that I make myself. The "WRT" is always the "console consumer" e.g. PC, my phone etc. Fortunately Rx Tx GND matches nicely to Ring, Tip, Ground... so long as I follow that I get it right first time... god knows I need easy to remember mnemonics like that now-a-days.
Notice. New forum software under development. It's going to miss a few functions and look a bit ugly for a while, but I'm working on it full time now as the old forum was too unstable. Couple days, all good. If you notice any issues, please contact me.
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You were on the PICAXE forums, were you not?
