AVR-Chat

Thanks Brian, yes h/w is all O.K.

I got the answer from the 'AVR-Club' and thought everyone may like to
know as it may help others starting out like me.

Someone else has pointed out that the AT90S2313 has 1 x 8 bit port
(Port B) and 1 x 7 bit port (Port D).  My program (yeah the whole two
lines I wrote myself) continually scans Port D (only 7 bits) and
places the value out onto Port B (eight bits).

The highest order push button (SW7) is not connected to Port D.

Sounds simple when someone points it out - had me tearing my hair out
last night.

I suppose that's the real value of these groups.  Thanks very much
everyone.

Regards
John

p.s. Probably back with more dumb questions as my learning journey
goes.  Thanks all for your feedback.


--- In AVR-Chat@yahoogroups.com, "Brian Fairchild" <b.fairchild@d...>
wrote:
> Have you checked your hardware?
>  
> Brian
> 
> -----Original Message-----
> From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On
> Behalf Of John Preller
> Sent: 25 August 2005 15:06
> To: AVR-Chat@yahoogroups.com
> Subject: [AVR-Chat] Help with C program on ATmel AT90S2313 (beginner)
> 
> 
> All,
> 
> This is my first attempt at using C and using the AVR platform.  I
> used the Codevision AVR C compiler to automatically produce the code
> below (as I have got a long road ahead of me before I can produce my
> own code from scratch).  The code is supposed to light an LED when the
> corresponding push button in pushed.  Problem is that the high order
> LED (bit 7) is always on.  All other LED's come on when you press the
> corresponding push button, but LED 7 is always on.  I can't see what
> is causing it in the code.  Can anyone shed some light on it for me
> please?
> 
> Much appreciated.
> 
> Cheers
> John
> 
> Code Below:
> ~~~~~~~~~~~~~~~~~~~~~
> /*****************************************************
> This program was produced by the
> CodeWizardAVR V1.24.6 Evaluation
> Automatic Program Generator
> C Copyright 1998-2005 Pavel Haiduc, HP InfoTech s.r.l.
> http://www.hpinfotech.com
> e-mail:office@h...
> 
> Project : 
> Version : 
> Date    : 25/08/2005
> Author  : Freeware, for evaluation and non-commercial use only
> Company : 
> Comments: 
> 
> 
> Chip type           : AT90S2313
> Clock frequency     : 3.680000 MHz
> Memory model        : Tiny
> External SRAM size  : 0
> Data Stack size     : 32
> *****************************************************/
> 
> #include <90s2313.h>
> 
> // Declare your global variables here
> void main(void)
> {
> // Declare your local variables here
> int data;
> // Input/Output Ports initialization
> // Port B initialization
> // Func7=Out Func6=Out Func5=Out Func4=Out Func3=Out Func2=Out
> Func1=Out Func0=Out 
> // State7=0 State6=0 State5=0 State4=0 State3=0 State2=0 State1=0
> State0=0 
> PORTB=0x00;
> DDRB=0xFF;
> 
> // Port D initialization
> // Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 
> // State6=T State5=T State4=T State3=T State2=T State1=T State0=T 
> PORTD=0x00;
> DDRD=0x00;
> 
> // Timer/Counter 0 initialization
> // Clock source: System Clock
> // Clock value: Timer 0 Stopped
> TCCR0=0x00;
> TCNT0=0x00;
> 
> // Timer/Counter 1 initialization
> // Clock source: System Clock
> // Clock value: Timer 1 Stopped
> // Mode: Normal top=FFFFh
> // OC1 output: Discon.
> // Noise Canceler: Off
> // Input Capture on Falling Edge
> // Timer 1 Overflow Interrupt: Off
> // Input Capture Interrupt: Off
> // Compare Match Interrupt: Off
> TCCR1A=0x00;
> TCCR1B=0x00;
> TCNT1H=0x00;
> TCNT1L=0x00;
> OCR1H=0x00;
> OCR1L=0x00;
> 
> // External Interrupt(s) initialization
> // INT0: Off
> // INT1: Off
> GIMSK=0x00;
> MCUCR=0x00;
> 
> // Timer(s)/Counter(s) Interrupt(s) initialization
> TIMSK=0x00;
> 
> // Analog Comparator initialization
> // Analog Comparator: Off
> // Analog Comparator Input Capture by Timer/Counter 1: Off
> ACSR=0x80;
> 
> while (1)
>       {
>       data=PIND;
>       PORTB=data;
>       
>             };
> }
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> 
> 
> 
> 
> 
> 
> 
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