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aj22r
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#1
Posted by aj22r: Mon. Dec 4, 2017 - 08:03 PM
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So i have this piece of code 

inline void sendByte(uint8_t clr) {
	for(uint8_t i = 0; i < 8; i++) {
		if((clr & (1 << (7-i))) > 0) {
			asm volatile(
				"sbi %[port], %[pin] \n\t"
				".rept %[delayH] \n\t"
				"nop \n\t"
				".endr \n\t"
				"cbi %[port], %[pin] \n\t"
				".rept %[delayL] \n\t"
				"nop \n\t"
				".endr \n\t"
				::
				[port]	"I" (_SFR_IO_ADDR(PORT)),
				[pin]	"I" (PIN),
				[delayH]	"I" (T1HC),
				[delayL]	"I" (T1LC)
			);
		} else {
			
		}
	}
}

and when i compile it it gives me this error, any idea how to fix this?

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Tools, Atmel Studio (AVR-related)
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Bronze Marktheusch
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Posted by theusch: Mon. Dec 4, 2017 - 08:43 PM
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1)  Your error list shows a span of over 100 lines -- much more than the posted fragment.

2)  Which line is 51?  Which line is 55?

3)  Aaah, GCC inline assembler.  The infinite-value toolchain.  Those with a good supply of eye of newt might be able to help but not us mere mortals.

 

(if I had to guess, it applies to pin or PIN)

You can put lipstick on a pig, but it is still a pig.

I've never met a pig I didn't like, as long as you have some salt and pepper.

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Bronze Marktheusch
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Posted by theusch: Mon. Dec 4, 2017 - 08:45 PM
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aj22r wrote:
asm volatile( "sbi %[port], %[pin] \n\t"  line 51?

".rept %[delayH] \n\t"

"nop \n\t"

".endr \n\t"

"cbi %[port], %[pin] \n\t" line 55?

You can put lipstick on a pig, but it is still a pig.

I've never met a pig I didn't like, as long as you have some salt and pepper.

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El Tangas
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Posted by El Tangas: Mon. Dec 4, 2017 - 09:07 PM
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When you look into inline gcc assembly... it looks back at you.

 

I suppose in your program PIN is higher than 7 and then the sbi and cbi instructions go out of range? Or maybe PIN is not a constant?

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awneil
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Posted by awneil: Mon. Dec 4, 2017 - 09:20 PM
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aj22r wrote:
So i have this piece of code

Is that something you wrote yourself, or something you found elsewhere ?

 

	for(uint8_t i = 0; i < 8; i++) {
		if((clr & (1 << (7-i))) > 0)

Think about the possible values for i in that loop;

 

For each of those values, think about what 

(1 << (7-i))

becomes ...

 

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aj22r
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Posted by aj22r: Mon. Dec 4, 2017 - 09:21 PM (Reply to #4)
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I forgot to mention this:
#define PORT PORTB
#define PIN 0x20

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aj22r
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Posted by aj22r: Mon. Dec 4, 2017 - 09:23 PM
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Is that something you wrote yourself, or something you found elsewhere ?

I found the assembly part elsewhere, but the other stuff i wrote myself

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Bronze MarkJohanEkdahl
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Posted by JohanEkdahl: Mon. Dec 4, 2017 - 09:53 PM
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It is very hard for us to map the error messages to the source code snippet you posted.

 

Do us all two favors so that we can help you better.

 

FAVOR 1:

i) Do a rebuild (i.e. a clean followed by a build)

ii) Switch to the Output tab (where the complete build output is shown)

iii) Select everything

iv) Copy

v) Paste into post you make here

 

FAVOR 2:

Post complete source so that we can see all #define's etc. If they are in a separate header file then post that too.

As of January 15, 2018, Site fix-up work has begun! Now do your part and report any bugs or deficiencies here. 

No guarantees, but if we don't report problems they won't get much of  a chance to be fixed! Details/discussions at link given just above.

 

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awneil
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Posted by awneil: Mon. Dec 4, 2017 - 09:59 PM (Reply to #7)
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go on - what about the loop values, then.

 

Use pencil & paper if necessary...

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sternst
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Posted by sternst: Mon. Dec 4, 2017 - 10:02 PM
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				"sbi %[port], %[pin] \n\t"
...
				"cbi %[port], %[pin] \n\t"
...
				[pin]	"I" (PIN),

#define PIN 0x20

You have to define PIN as a bit number (5 in this case), not as a mask.

Stefan Ernst

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sternst
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Posted by sternst: Mon. Dec 4, 2017 - 10:03 PM
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awneil wrote:
go on - what about the loop values, then.
I do not see any problem. "i" goes from 0 to 7, so "(7-i)" goes from 7 to 0.

Stefan Ernst

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El Tangas
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Posted by El Tangas: Mon. Dec 4, 2017 - 10:09 PM (Reply to #10)
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Exactly, sbi and cbi assembly instructions take the bit number as argument, and not the bit mask.

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awneil
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Posted by awneil: Mon. Dec 4, 2017 - 10:22 PM (Reply to #11)
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Is zero positive ... ?

 

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sternst
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Posted by sternst: Mon. Dec 4, 2017 - 10:32 PM
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awneil wrote:
Is zero positive ... ?
What are you talking about?

Stefan Ernst

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awneil
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Posted by awneil: Mon. Dec 4, 2017 - 10:39 PM (Reply to #14)
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The message said, "must be positive..."

 

But I agree that it's a red herring - it'll be the "bit position - not mask" issue ...

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sternst
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Posted by sternst: Mon. Dec 4, 2017 - 10:47 PM
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awneil wrote:
The message said, "must be positive..."
Oh, the error message. I thought it was also related to the loop values.

Stefan Ernst

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joeymorin
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Posted by joeymorin: Mon. Dec 4, 2017 - 11:10 PM
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The message said, "must be positive..."

The error message has an error ;-)

"Experience is what enables you to recognise a mistake the second time you make it."

"Good judgement comes from experience.  Experience comes from bad judgement."

"Wisdom is always wont to arrive late, and to be a little approximate on first possession."

"When you hear hoofbeats, think horses, not unicorns."

"Fast.  Cheap.  Good.  Pick two."

"We see a lot of arses on handlebars around here." - [J Ekdahl]

 

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Greg_Muth
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Posted by Greg_Muth: Mon. Dec 4, 2017 - 11:34 PM
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He who fights with bugs should look to it that he himself does not become a bug.  And...

When you look into inline gcc assembly... it looks back at you.

 

Greg Muth

Portland, OR, US

Xplained/Pro/Mini Boards mostly

 

Make Xmega Great Again!

 

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Greg_Muth
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Posted by Greg_Muth: Mon. Dec 4, 2017 - 11:42 PM
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The error message has an error ;-)

...but the difference between the positive integers and the non-negative integers is 0.devil

Greg Muth

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El Tangas
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Posted by El Tangas: Mon. Dec 4, 2017 - 11:43 PM
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awneil wrote:

Is zero positive ... ?

 

 

Well, it's non-negative :P

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awneil
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Posted by awneil: Tue. Dec 5, 2017 - 12:00 AM (Reply to #20)
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I think this is a rigidly defined area of doubt and uncertainty ...

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  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...
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skeeve
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Posted by skeeve: Tue. Dec 5, 2017 - 01:51 AM
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Anyone remember one-eyed no-nosed nothings?

Iluvatar is the better part of Valar.

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joeymorin
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Posted by joeymorin: Tue. Dec 5, 2017 - 04:14 AM
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No, but I remember one-eyed one-horned flying purple people eaters.

"Experience is what enables you to recognise a mistake the second time you make it."

"Good judgement comes from experience.  Experience comes from bad judgement."

"Wisdom is always wont to arrive late, and to be a little approximate on first possession."

"When you hear hoofbeats, think horses, not unicorns."

"Fast.  Cheap.  Good.  Pick two."

"We see a lot of arses on handlebars around here." - [J Ekdahl]

 

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sparrow2
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Posted by sparrow2: Tue. Dec 5, 2017 - 08:55 AM
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What do you try to do?

 

sbi can't take parameters, it's a fixed instruction!

 

To do what you want you have to make it with a AND with a mask and then use brne/breq.

Last Edited: Tue. Dec 5, 2017 - 12:12 PM
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Gold Markclawson
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Posted by clawson: Tue. Dec 5, 2017 - 09:07 AM
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joeymorin wrote:
purple people eater
Which is what my twin brother called the first car he ever owned - a purple mark 2 Cortina:

 

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Posted by Kartman: Tue. Dec 5, 2017 - 10:17 AM (Reply to #25)
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Ooh baby! That’s shagadelic!

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El Tangas
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Posted by El Tangas: Tue. Dec 5, 2017 - 02:00 PM (Reply to #26)
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Yep, those seats must have seen plenty of action back in the day ;-)

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skeeve
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Posted by skeeve: Wed. Dec 6, 2017 - 04:39 AM
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joeymorin wrote:
No, but I remember one-eyed one-horned flying purple people eaters.
I have the movie.

Iluvatar is the better part of Valar.

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joeymorin
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Posted by joeymorin: Wed. Dec 6, 2017 - 04:50 AM
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I didn't even know it existed!  I had the '45 of the song.

 

NPH before Doogie and Dr. Horrible... I wonder if it's worth watching...?

"Experience is what enables you to recognise a mistake the second time you make it."

"Good judgement comes from experience.  Experience comes from bad judgement."

"Wisdom is always wont to arrive late, and to be a little approximate on first possession."

"When you hear hoofbeats, think horses, not unicorns."

"Fast.  Cheap.  Good.  Pick two."

"We see a lot of arses on handlebars around here." - [J Ekdahl]

 

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Bronze Marktheusch
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Posted by theusch: Wed. Dec 6, 2017 - 03:57 PM
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joeymorin wrote:
NPH before Doogie and Dr. Horrible... I wonder if it's worth watching...?

Now you made me do a Google session, and the "Songfacts" are interesting

http://www.songfacts.com/detail....

...which includes

The song got its own Disney Channel film in 1988 with Purple People Eater, in which a young boy plays the song and accidentally summons the creature itself, who then befriends him on an adventure. Neil Patrick Harris plays the boy, who later went on to play Doogie Howser M.D..

...and hits for the "movie" on Wikipedia and IMDB.

You can put lipstick on a pig, but it is still a pig.

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joeymorin
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Posted by joeymorin: Wed. Dec 6, 2017 - 04:11 PM
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Then there's C.W. McCall's 'Convoy'... followed by Kris Kristofferson's 'Convoy'  ;-)

 

 

"Experience is what enables you to recognise a mistake the second time you make it."

"Good judgement comes from experience.  Experience comes from bad judgement."

"Wisdom is always wont to arrive late, and to be a little approximate on first possession."

"When you hear hoofbeats, think horses, not unicorns."

"Fast.  Cheap.  Good.  Pick two."

"We see a lot of arses on handlebars around here." - [J Ekdahl]

 

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Posted by jgmdesign: Wed. Dec 6, 2017 - 05:38 PM
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My Apologies to the OP for the community dragging your thread into the abyss.

 

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

 

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joeymorin
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Posted by joeymorin: Wed. Dec 6, 2017 - 05:40 PM
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My Apologies to the OP for the community dragging your thread into the abyss.

Yeah, that was me :(

"Experience is what enables you to recognise a mistake the second time you make it."

"Good judgement comes from experience.  Experience comes from bad judgement."

"Wisdom is always wont to arrive late, and to be a little approximate on first possession."

"When you hear hoofbeats, think horses, not unicorns."

"Fast.  Cheap.  Good.  Pick two."

"We see a lot of arses on handlebars around here." - [J Ekdahl]

 

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