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sensorDigitalIn weird values

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sensorDigitalIn weird values

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mightor

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Joined: Wed Mar 05, 2008 8:14 am
Posts: 2862
Location: Rotterdam, The Netherlands

sensorDigitalIn weird values

Hey guys,

I am trying to write some code to make the NXTCam work on the VEX Cortex by bit-banging I2C. I can see perfectly fine I2C messages being sent back and forth (using a protocol analyser), only the firmware is not really digging it.


	Code: int READSDA() { SensorType[SDATA] = sensorDigitalIn; wait1Msec(1); int val = SensorValue[SDATA]; writeDebugStreamLine("sdata: %d", val); return val; }

This keeps spitting out values between 245 and 246. Is there a reason this would be anything other than 0 or 1, seeing as it's a digital in? SDA has pull-ups that should pull it to +5V when it is set to sensorDigitalIn. I have also tried increasing the wait time, nothing makes a difference.
I've tried this with both a HT Colour Sensor V2 and the NXTCam V3, both give me the similar results.
I am using ROBOTC 3.13b.

- Xander

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Fri Jun 29, 2012 3:27 pm

JohnWatson

Site Admin

Joined: Thu May 24, 2012 12:15 pm
Posts: 386

Re: sensorDigitalIn weird values

Hey Xander,

Sorry for the long wait on the response; have you checked your flux capacitor values on the NXTCam?

But in all seriousness, I'm guessing this is probably an issue with the 3.13 build (betas are fun), I'll make sure Tim and some of the more code-savvy members get a look at this and get it taken care of.

Thanks for the heads up, and if you come across any other issues please let us know!

John

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Fri Jul 06, 2012 11:11 am

mightor

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Joined: Wed Mar 05, 2008 8:14 am
Posts: 2862
Location: Rotterdam, The Netherlands

Re: sensorDigitalIn weird values


	Quote: Sorry for the long wait on the response; have you checked your flux capacitor values on the NXTCam?

Yes, I even tried switching it off and back on, no dice, I'm still stuck 2012.


	Quote: But in all seriousness, I'm guessing this is probably an issue with the 3.13 build (betas are fun), I'll make sure Tim and some of the more code-savvy members get a look at this and get it taken care of.

I'll wait for a new build, I hope Dick recovers from the last compiler bomb I sent him

- Xander

Fri Jul 06, 2012 12:03 pm

JohnWatson

Site Admin

Joined: Thu May 24, 2012 12:15 pm
Posts: 386

Re: sensorDigitalIn weird values

"Compiler bomb". I like that term so much, I may just steal it from you and start using it in my everyday speech.

Fri Jul 06, 2012 1:05 pm

mightor

Moderator

Joined: Wed Mar 05, 2008 8:14 am
Posts: 2862
Location: Rotterdam, The Netherlands

Re: sensorDigitalIn weird values

My driver suite is the real reason Dick's hair has been thinning out!

- Xander

Fri Jul 06, 2012 2:02 pm

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