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Forum Index : Microcontroller and PC projects : 8x7-seg display on MM

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lang70
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Joined: 11/10/2012
Location: Australia
Posts: 3

Posted: 01:12pm 11 Oct 2012

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I have original MM and trying luck with connecting to dealextreme 8x 7-seg dsply with butns (uses TM1638 IC). says is 3wire serial device (DIO,clk,strobe). should I be using I2C to communicate?

bigmik

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Joined: 20/06/2011
Location: Australia
Posts: 2914

Posted: 02:27pm 11 Oct 2012

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lang70 said I have original MM and trying luck with connecting to dealextreme 8x 7-seg dsply with butns (uses TM1638 IC). says is 3wire serial device (DIO,clk,strobe). should I be using I2C to communicate?

Hi,

I think they are Clocked IO or maybe SPI driven.. You may need to use SPI routines if they will work... I havent used them before so I will leave that open for others to comment on... I bought one of those modules myself but havent tried it yet. I was going to use it on my DM as it has SHIFTOUT/SHIFTIN commands with DMBasic (not MMBasic for DM) which would make this simpler.

Some info with C example is available HERE
Data sheet of the TM1638 is HERE

Regards,

Mick

Mick's uMite Stuff can be found >>> HERE (Kindly hosted by Dontronics) <<<

CircuitGizmos

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Joined: 08/09/2011
Location: United States
Posts: 1425

Posted: 04:20am 12 Oct 2012

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Definitely not I2C. It looks like a modified SPI - more to do than just SPI, though. You might want to start out by toggling all of the lines by yourself. You can do that step-by-step to make sure that they are doing what you wish.

Take a look at the post I did with the VFD. I included all of my code. You can steal and modify that code if you want. It clocks out data and toggles the clock for each bit.

http://www.thebackshed.com/forum/forum_posts.asp?TID=5224&PN =1

Here is an Arduino library for the part:
http://code.google.com/p/tm1638-library/

And code for a TI processor:
http://sourceforge.net/projects/msp430-tm1638/ Edited by CircuitGizmos 2012-10-13

Micromites and Maximites! - Beginning Maximite

jdh2550
Regular Member

Joined: 16/07/2012
Location: United States
Posts: 62

Posted: 09:26am 19 Oct 2012

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Check out this thread: http://www.thebackshed.com/forum/forum_posts.asp?TID=5245&PN =1

That's the same chip.

Sorry, I missed this thread when I posted that one. I don't have the segment stuff posted yet - I'll be working on it this weekend. I'll update that thread when I get it done.

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