Split from: A Few Truly Bad Puns

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avr-mike
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#1
Posted by avr-mike: Mon. Jul 23, 2018 - 02:45 PM
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I'm having trouble with this code:


int counter = 0;
int good    = 0x2A;

ISR(TIMER0_OVF_vect) { ++counter; }

int bit_slice (int x) {
    return (x & 0x3C);
    // these don't work either....
    // return (x & 0x7E);
    // return (x & 0x3E);
}   

bool truth (int x) 
{ 
    return (bit_slice(counter) == good); 
}

It's like the counter is not even updating.

The truth is not good no matter how I slice it.

 

--Mike

 

Tags:

Tools, Compilers and General Programming
Last Edited: Mon. Jul 23, 2018 - 04:56 PM
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valusoft
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Posted by valusoft: Mon. Jul 23, 2018 - 02:48 PM
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Stop hijacking the pun thread!

 

Moderator

 

Ross McKenzie ValuSoft Melbourne Australia

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awneil
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Posted by awneil: Mon. Jul 23, 2018 - 02:49 PM (Reply to #2)
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or the pun-ishment will be severe?

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avr-mike
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Posted by avr-mike: Mon. Jul 23, 2018 - 03:03 PM (Reply to #2)
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OMG -- both of those ARE puns!!!  :-)

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Gold Markclawson
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Posted by clawson: Mon. Jul 23, 2018 - 03:07 PM
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Image result for joke overhead

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awneil
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Posted by awneil: Mon. Jul 23, 2018 - 03:11 PM
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laugh blush surprise

Top Tips:

  1. How to properly post source code - see: https://www.avrfreaks.net/comment... - also how to properly include images/pictures
  2. "Garbage" characters on a serial terminal are (almost?) invariably due to wrong baud rate - see: https://learn.sparkfun.com/tutorials/serial-communication
  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
  4. Difference between a crystal, and a crystal oscillator: https://www.avrfreaks.net/comment...
  5. When your question is resolved, mark the solution: https://www.avrfreaks.net/comment...
  6. Beginner's "Getting Started" tips: https://www.avrfreaks.net/comment...
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jgmdesign
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Posted by jgmdesign: Mon. Jul 23, 2018 - 04:55 PM
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Make the counter volatile and it shouldn't the problem. Variables used in ISRs that are also used elsewhere must be declared volatile.

Jim

I would rather attempt something great and fail, than attempt nothing and succeed - Fortune Cookie

 

"The critical shortage here is not stuff, but time." - Johan Ekdahl

 

"Step N is required before you can do step N+1!" - ka7ehk

 

"If you want a career with a known path - become an undertaker. Dead people don't sue!" - Kartman

"Why is there a "Highway to Hell" and only a "Stairway to Heaven"? A prediction of the expected traffic load?"  - Lee "theusch"

 

Speak sweetly. It makes your words easier to digest when at a later date you have to eat them ;-)  - Source Unknown

Please Read: Code-of-Conduct

Atmel Studio6.2/AS7, DipTrace, Quartus, MPLAB, RSLogix user

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awneil
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Posted by awneil: Mon. Jul 23, 2018 - 05:00 PM (Reply to #7)
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did you miss #4 ?

 

wink

Top Tips:

  1. How to properly post source code - see: https://www.avrfreaks.net/comment... - also how to properly include images/pictures
  2. "Garbage" characters on a serial terminal are (almost?) invariably due to wrong baud rate - see: https://learn.sparkfun.com/tutorials/serial-communication
  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
  4. Difference between a crystal, and a crystal oscillator: https://www.avrfreaks.net/comment...
  5. When your question is resolved, mark the solution: https://www.avrfreaks.net/comment...
  6. Beginner's "Getting Started" tips: https://www.avrfreaks.net/comment...
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jgmdesign
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Posted by jgmdesign: Mon. Jul 23, 2018 - 05:09 PM
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awneil wrote:

did you miss #4 ?

 

wink

So much for my being helpful

Jim

I would rather attempt something great and fail, than attempt nothing and succeed - Fortune Cookie

 

"The critical shortage here is not stuff, but time." - Johan Ekdahl

 

"Step N is required before you can do step N+1!" - ka7ehk

 

"If you want a career with a known path - become an undertaker. Dead people don't sue!" - Kartman

"Why is there a "Highway to Hell" and only a "Stairway to Heaven"? A prediction of the expected traffic load?"  - Lee "theusch"

 

Speak sweetly. It makes your words easier to digest when at a later date you have to eat them ;-)  - Source Unknown

Please Read: Code-of-Conduct

Atmel Studio6.2/AS7, DipTrace, Quartus, MPLAB, RSLogix user

Last Edited: Mon. Jul 23, 2018 - 05:10 PM
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