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Re: [avr-gcc-list] light up and led
From: |
Vincent Trouilliez |
Subject: |
Re: [avr-gcc-list] light up and led |
Date: |
Thu, 06 Oct 2005 13:17:39 +0200 |
> ok i made it turn on. now i've attempted to make it blink,
> unsuccessfully. the light just stays off now.
> unsigned char i;
> DDRA |= 1<<PA0;
> while (1) {
> for (i=0; i<20000; i++) wait();
> PORTA |= 1<<PA0;
That's normal I think. You turn the LED on when i reaches 20,000, but
you have declared i as a byte, so it will never exceed 255.
You should declare i as unsigned int, not unsigned char.
> also, is there a more elegant way of doing time delays?
Your "wait" function is mostly useless I think, you could just remove it
altogether, and increase the loop count a bit to compensate
But you might prefer using the built-in "delay" functions, have a look
in the avr-libc documentation, page 22: "busy-wait delay loops".
--
Vince
- [avr-gcc-list] light up and led, Timothy Smith, 2005/10/06
- Re: [avr-gcc-list] light up and led, Bernard Fouché, 2005/10/06
- Re: [avr-gcc-list] light up and led, Joerg Wunsch, 2005/10/06
- Re: [avr-gcc-list] light up and led, Timothy Smith, 2005/10/06
- Re: [avr-gcc-list] light up and led,
Vincent Trouilliez <=
- Re: [avr-gcc-list] light up and led, Joerg Wunsch, 2005/10/06
- Re: [avr-gcc-list] light up and led, Patrick Blanchard, 2005/10/06
- Re: [avr-gcc-list] light up and led, Joerg Wunsch, 2005/10/06
- Re: [avr-gcc-list] light up and led, Timothy Smith, 2005/10/06
- Re: [avr-gcc-list] light up and led, Daniel Mayo, 2005/10/06
- Re: [avr-gcc-list] light up and led, Timothy Smith, 2005/10/06
- Re: [avr-gcc-list] light up and led, Patrick Blanchard, 2005/10/06
- Re: [avr-gcc-list] light up and led, Timothy Smith, 2005/10/06
- Re: [avr-gcc-list] light up and led, Patrick Blanchard, 2005/10/06
- Message not available
- Message not available
- Re: [avr-gcc-list] light up and led, Patrick Blanchard, 2005/10/07