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Forum Index : Microcontroller and PC projects : Anyone want to help test my I2c code

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ksdesigns

Senior Member

Joined: 25/06/2011
Location: United States
Posts: 143
Posted: 03:05pm 08 Jul 2011
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Don
I was hoping to get some feedback to see if it works well for other people first
and it is done the correct way modular so its easy to add.
just need to add some comments to the code and i will send it to Geoff
ken
 
donmck

Guru

Joined: 09/06/2011
Location: Australia
Posts: 1310
Posted: 08:10pm 08 Jul 2011
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  ksdesigns said   Don
I was hoping to get some feedback to see if it works well for other people first
and it is done the correct way modular so its easy to add.
just need to add some comments to the code and i will send it to Geoff
ken


no worries, thanks Ken,

I thought it may have been a silly statement mentioning it to you, but felt I better just in case.

Just hope users give you feed back fairly quickly.

Cheers Don...
https://www.32v8.com/1
 
stuarts

Senior Member

Joined: 15/06/2011
Location: Australia
Posts: 194
Posted: 02:14am 09 Jul 2011
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Ken, grrrrrr, cant find a 26 way header to make a I2C cable. Off to the shops to get a couple and then fix my code to run with your firmware.

Stuart
Time is nature's way of keeping everything from happening all at once.
 
stuarts

Senior Member

Joined: 15/06/2011
Location: Australia
Posts: 194
Posted: 07:14am 09 Jul 2011
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Ken, I've just changed my program that I've been using to test my I2C basic code to use your i2cwrite command and its running fine. I'll have a go later with the DS1631 code and see how that goes.

Thanks for all your work.

Geoff, would it be possible to release the 2.4a source so that Ken could recompile.

I'm really missing my edit command.

Stuart
Time is nature's way of keeping everything from happening all at once.
 
stuarts

Senior Member

Joined: 15/06/2011
Location: Australia
Posts: 194
Posted: 02:12pm 09 Jul 2011
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Ken, one thing I dont really understand, and I've never used an I2C memory device. When you send an address to the memory to select a memory location, is it a 16 bit or and 8 bit address. How does your code handle different devices of different capacities?



Tomorrow I'll attack the DS1631 code and get it running under your firmware. If it is as easy as the PCF8574 code earlier today it will be a breeze.

Stuart
Time is nature's way of keeping everything from happening all at once.
 
stuarts

Senior Member

Joined: 15/06/2011
Location: Australia
Posts: 194
Posted: 12:39pm 10 Jul 2011
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Ken, I put a great long post here about how I couldn't get the DS1631 to work, moved to my other PC to look at the signals with the CRO and it seems to be working now. stay posted.

Stuart
Edited by stuarts 2011-07-11
Time is nature's way of keeping everything from happening all at once.
 
stuarts

Senior Member

Joined: 15/06/2011
Location: Australia
Posts: 194
Posted: 01:52pm 10 Jul 2011
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Ken, I've just got my 2 DS1631 thermometers running.

So far, as far as I can see your code is running very nicely.


10: CLS
20: REM *** T1 is first thermometer, T2 is second thermometer ***
30: I2CINIT(100)
40: I2CWRITE(&h90,&hac,&h06): REM *** T1, set cont conv, 2 bit fract temp ***
50: I2CWRITE(&h90,&h51): REM *** T1 start temp conv ***
60: I2CWRITE(&h92,&hac,&h06): REM *** T2, set cont conv, 2 bit fract temp ***
70: I2CWRITE(&h92,&h51): REM *** T2 start temp conv ***
80: PAUSE 1000
90: i2cbuf(0)=0:i2cbuf(1)=0: REM *** clear used bytes of i2c buffer ***
100: I2CREAD(&h90,&haa,2): REM *** T1, read 2 bytes of temperature ***
110: PRINT i2cbuf(0)+i2cbuf(1)/256;" degrees ";
120: i2cbuf(0)=0:i2cbuf(1)=0: REM *** clear used bytes of i2c buffer ***
130: I2CREAD(&h92,&haa,2): REM *** T2, read 2 bytes of temperature ***
140: PRINT i2cbuf(0)+i2cbuf(1)/256;" degrees"
150: PAUSE 1000
160: GOTO 90


Many thanks for your work.

Stuart
Time is nature's way of keeping everything from happening all at once.
 
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