fourfour Posted May 17, 2013 Report Posted May 17, 2013 Hey guys. I feel super stupid atm. I can't get anything to work as expected. I need to get back the basics here. I am have the LPC17 and a DOUT connected via J8. I hooked up an LED to Vs and D7 and entered 'set dout all 0'. I am still getting 5v at D7 all the time. Nothing else is connected. What am I doing wrong? Board specs attached. Thanks!! -eric Quote
kpete Posted May 17, 2013 Report Posted May 17, 2013 Why don't you try setting all the Dout's to 1 with the command "set dout all 1" and see if it changes things. The outputs might be inverted in your configuration. Pete Quote
fourfour Posted May 18, 2013 Author Report Posted May 18, 2013 Hey Pete. Ya, I tried that already. I also tried setting individual pins to 0|1 and nothing happens. Quote
Duggle Posted May 18, 2013 Report Posted May 18, 2013 Have you eliminated basic wiring error? (I suppose the cable could be in backwards...) Can you post a picture? Quote
fourfour Posted May 18, 2013 Author Report Posted May 18, 2013 Hey Duggle. I am getting voltage to the DOUT board, tried using J8 and J9. Here are some pics, thanks for your help!! https://s3.amazonaws.com/uploads.hipchat.com/14874/54948/jijmbr9a06d226i/IMG_9264.jpg https://s3.amazonaws.com/uploads.hipchat.com/14874/54948/szsbs0p7lz9nyxs/IMG_1599.JPG Quote
Spirit Posted May 18, 2013 Report Posted May 18, 2013 hi as i see on you pic it seems the 74HCT541 seems to we wrong connected... /spirit Quote
TK. Posted May 18, 2013 Report Posted May 18, 2013 Correct! @fourfour: don't forget to spend spirit a beer for his careful observation! :) Best Regards, Thorsten. Quote
fourfour Posted May 18, 2013 Author Report Posted May 18, 2013 @spirit: oh my, thanks for catching that. Unfortunately, that didn't solve the issue. LED still on all the time. I checked my wiring again over the whole board. (how do you send a beer?) Quote
Duggle Posted May 19, 2013 Report Posted May 19, 2013 It's not clear from the photos the connections from core to dout (all wires are white). Why not IDC/ribbons? They can be sourced cheaply (from the right places) they are very quick, neat, extremely reliable, and hard to get wrong connections. Quote
fourfour Posted May 19, 2013 Author Report Posted May 19, 2013 @duggle: I assumed they just mirrored J8 e.g Vs Vd Si Sc Rc I have some ribbons on order. The site didn't state that I needed to order them separately. Thanks for your help. Quote
Spirit Posted May 19, 2013 Report Posted May 19, 2013 (edited) ahh yes you also see that on the pic but you use the wrong Row pins... you need to use J9: VS VD SO <----!!!! SC RC1 SI = for DIN (Buttons/Encoders) SO= DOUT (LED) /Spirit Edited May 19, 2013 by Spirit Quote
fourfour Posted May 19, 2013 Author Report Posted May 19, 2013 Ok! We have liftoff! Thanks so much everyone. Quote
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