AVR-Chat

You have to "build" the code. I use the SDK500 and Studio4.x. The build will 
generate the object code. If an error occurs, it will flag it.
Try using the GPIOR0, 1, 2 registers with the instructions given in the 
manual. Only GRIOR0 will  work.
D
----- Original Message ----- 
From: "Don Jackson" <ae5k.radio@gmail.com>
To: <AVR-Chat@yahoogroups.com>
Sent: Wednesday, August 31, 2005 10:46 PM
Subject: Re: Re: Re: [AVR-Chat] Errors in manuals ...


> Hi Dennis,
>
> Thanks for the reply to my query.
>
> I do not wish to revisit the debate on the RET and RETI stuff, and also
> do not wish to provoke a lot of debate on the GPIORx either, but in my
> copy of the Atmel Data Sheet (just updated my copy tonight), 2545F dated
> 06/05 (and it said the same thing in my older year old version):
>
> page 24: General Purpose I/O Registers within the address range 0x00 -
> 0x1F are directly bit-accessible using the SBI, CBI, SBIS, and SBIC
> instructions.
>
> page 337: shows GPIOR0 at 0x1E (which implies it IS bit-accessible using
> SBI, etc.) and it shows GPIOR1 at 0x2A and GPIOR2 at 0x2B (which implies
> is IS NOT bit-accessible using SBI, etc.).  I believe this is what you
> found, isn't it?
>
> Don
>
> PS - as a side note, it is interesting that at least my PDF reader
> program will not allow "copy & paste" of text in this datasheet ;-)
>
> Dennis wrote:
>> The GPIOR0, 1 & 2 do not all respond to the instructions specified. Only
>> GPIOr0 does. I use the LDS and STS with all 3.
>> If you look at the RET and RETI instructions, the stack operations are 
>> the
>> same, according to the manual. However, the RET does return to the
>> instruction following the CALL whereas the RETI returns to the 
>> instruction
>> at point of interrupt. In the case of the RETI, after much debate and 
>> RTFM
>> bull, you have to use a polled type of interrupt.
>> D
>> ----- Original Message ----- 
>> From: "Don Jackson" <ae5k.radio@gmail.com>
>> To: <AVR-Chat@yahoogroups.com>
>> Sent: Wednesday, August 31, 2005 8:51 PM
>> Subject: Re: Re: [AVR-Chat] Errors in manuals ...
>>
>>
>>
>>>Dennis wrote:
>>>
>>>
>>>>>>Data sheet definitions are sometimes wrong as are manuals. I found 
>>>>>>that
>>>>>>out
>>>>>>the hard way with the mega168.
>>>>>>....
>>>
>>>Would you be so kind as to let us know what is wrong in the mega168 data
>>>sheet?  I'm about to use this one...
>>>
>>>Thanks,
>>>Don
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