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Forum Index : Microcontroller and PC projects : SDI problems

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Bizzie
Senior Member

Joined: 06/07/2014
Location: Australia
Posts: 185
Posted: 07:05pm 16 Jun 2015
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Not sure if I should start a new topic or use matherp's - MM2: 2.4" SPI Colour Touchscreen topic. Anyhow here it is as a new topic!

I have purchased 4 : TFT 2.4" Touchscreens from the link on matherp's topic.
I am having no luck in getting 2 of them to work (Not game to get the others out of their packaging).

They are breadboarded as the following image shows.




Can anyone see any problems? I have the jumper referred to closed and I measure 3.3v on pin 1 of the display. As this is the first time I have used SPI I have no idea what voltages I may be able to measure on other pins.

How do you best solve a problem like this?

I have successfully loaded all 3 of matherp's programs using MMedit into the uMite and can also edit etc from TT so I know it is not a uMite problem. uMite is running V4.6 .

Hoping someone can help.
Rob White
 
BobD

Guru

Joined: 07/12/2011
Location: Australia
Posts: 935
Posted: 07:25pm 16 Jun 2015
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Rob
There have been several problems successfully fixed by finding that the breadboard wasn't making good contact, only intermittent contact, or no contact at all. Have you checked this?
Bob
 
TassyJim

Guru

Joined: 07/08/2011
Location: Australia
Posts: 5923
Posted: 07:27pm 16 Jun 2015
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I can't see your connection to the LED pin.
I think it's pin 23 on your breadboard and needs a ~18 ohm to 5V or 3.3V

Jim
VK7JH
MMedit   MMBasic Help
 
Bizzie
Senior Member

Joined: 06/07/2014
Location: Australia
Posts: 185
Posted: 07:29pm 16 Jun 2015
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I was aware of this issue and rewired with new wires in a different position on the board.
Rob White
 
Bizzie
Senior Member

Joined: 06/07/2014
Location: Australia
Posts: 185
Posted: 07:37pm 16 Jun 2015
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  Quote  I can't see your connection to the LED pin.
I think it's pin 23 on your breadboard and needs a ~18 ohm to 5V or 3.3V



Thanks Jim That did the job!! Knew it would be simple.

Fixed in less than half an hour Internet's great isn't it.

Rob
Rob White
 
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