Pages: [1] 2   Go Down
Author Topic: hello world!!!  (Read 813 times)
0 Members and 1 Guest are viewing this topic.
Offline Offline
Newbie
*
Karma: 0
Posts: 14
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Hi!
I found something strange maybe, i tried the example hello world on arduino mega with the lcd keypad shield from dfrobot and when i put 3 "!!!" on the print the is a bug and i can't send code to arduino, 2 "!!" walks but not 3. Is it normal?
Logged

Offline Offline
Edison Member
*
Karma: 57
Posts: 2078
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Yes, it's a bug.

There are improvements made to the bootloader of the Mega.
You could try to write the bootloader if you have programmer (or Arduino as ISP) using the ICSP header (the 6 pins).
Logged

Global Moderator
UK
Offline Offline
Brattain Member
*****
Karma: 238
Posts: 24317
I don't think you connected the grounds, Dave.
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Of course, you have to ask yourself why you would ever put more than one exclamation mark in a print.
AFAIK, the only legitimate use of more than one identical consecutive punctuation mark is for ellipsis...
« Last Edit: June 26, 2013, 05:30:34 am by AWOL » Logged

"Pete, it's a fool looks for logic in the chambers of the human heart." Ulysses Everett McGill.
Do not send technical questions via personal messaging - they will be ignored.

Offline Offline
Newbie
*
Karma: 0
Posts: 14
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

i didn't rode in the arduino documentation it was forgiven to use 3 times ponctuation mark. I post it more to help people if they got the same problem because i found it i share it that's all. Answer to answer not to help! Ask yourself why you answer my post!
Logged

Seattle, WA USA
Offline Offline
Brattain Member
*****
Karma: 548
Posts: 46026
Seattle, WA USA
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Quote
Ask yourself why you answer my post!
You did something useless that caused a problem. There is no valid reason to use three or more exclamation points in a row. Doing so is a documented issue. It triggers debug mode in the bootloader of the Mega. So, don't do.

Sure, it's exciting to get something to appear on the LCD, but the LCD knew it could do it, so it doesn't get all excited about doing its job.

So, why ARE you using three !!!??????????????????????????????????????????????????????
Logged

Global Moderator
UK
Offline Offline
Brattain Member
*****
Karma: 238
Posts: 24317
I don't think you connected the grounds, Dave.
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Quote
Ask yourself why you answer my post!
I asked myself, and I replied "because this is a known feature, it is documented, and there has been one almost identical "bug report" already this week".

Quote
i didn't rode in the arduino documentation it was forgiven to use 3 times ponctuation mark.
It isn't written anywhere because, like looking for a gas-leak with a candle, it is assumed that people wouldn't be that silly.
« Last Edit: June 26, 2013, 06:27:29 am by AWOL » Logged

"Pete, it's a fool looks for logic in the chambers of the human heart." Ulysses Everett McGill.
Do not send technical questions via personal messaging - they will be ignored.

Offline Offline
Newbie
*
Karma: 0
Posts: 14
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Ok Thank you, i began arduino yesterday so i don't see this post and i didn't parse the forum to find this. Next time i hope you will give me the link with the answer before saying me "ask yourself".
Logged

Global Moderator
UK
Offline Offline
Brattain Member
*****
Karma: 238
Posts: 24317
I don't think you connected the grounds, Dave.
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Just out of interest, what was the answer to the question "why you would ever put more than one exclamation mark in a print"?
Logged

"Pete, it's a fool looks for logic in the chambers of the human heart." Ulysses Everett McGill.
Do not send technical questions via personal messaging - they will be ignored.

Offline Offline
Newbie
*
Karma: 0
Posts: 14
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

I want to print something on my arduino. do i have to justify it?
Logged

Leeds, England
Offline Offline
Sr. Member
****
Karma: 8
Posts: 417
Quick, chuck it in the bin before the boss finds out...
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Quote
I want to print something on my arduino. do i have to justify it?

Not at all. But if you are asking a question of the other people on forum is it unreasonable for them to ask questions in return?
Logged

Beginners guide to using the Seeedstudio SIM900 GPRS/GSM Shield

Offline Offline
Newbie
*
Karma: 0
Posts: 14
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

I don't have problem with questions but why ask me a question without responding my first question when you have the answer?
Logged

Global Moderator
UK
Offline Offline
Brattain Member
*****
Karma: 238
Posts: 24317
I don't think you connected the grounds, Dave.
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Quote
why ask me a question without responding my first question when you have the answer?
The answer was already there in reply #1.
Or, you could have looked for it.
I'm a moderator, not a search engine.
Logged

"Pete, it's a fool looks for logic in the chambers of the human heart." Ulysses Everett McGill.
Do not send technical questions via personal messaging - they will be ignored.

UK
Offline Offline
Shannon Member
****
Karma: 183
Posts: 11154
-
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

There is no valid reason to use three or more exclamation points in a row.

Utter rubbish. There is no reason not to use arbitrary sequences of any characters I choose to use. The fact that the bootloader breaks when this particular sequence is used is a design fault in the bootloader, nothing more.
Logged

I only provide help via the forum - please do not contact me for private consultancy.

Global Moderator
UK
Offline Offline
Brattain Member
*****
Karma: 238
Posts: 24317
I don't think you connected the grounds, Dave.
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Quote
The fact that the bootloader breaks
Where did this idea of "break" come in?
It does what it is supposed to do.
That it isn't well documented is unfortunate.
Logged

"Pete, it's a fool looks for logic in the chambers of the human heart." Ulysses Everett McGill.
Do not send technical questions via personal messaging - they will be ignored.

Leeds, England
Offline Offline
Sr. Member
****
Karma: 8
Posts: 417
Quick, chuck it in the bin before the boss finds out...
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

And the fact that you can't search for '!!!' is even more unfortunate! All I got was a message suggesting that I'd forgotten to enter the search criteria.
Logged

Beginners guide to using the Seeedstudio SIM900 GPRS/GSM Shield

Pages: [1] 2   Go Up
Jump to: