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Results tagged with sketch
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user 10794
A sketch is compiled code that is uploaded to an Arduino board.
6
votes
Is there any way to download a sketch from an Arduino?
There are likely to be one of two scenarios:
Your sketch was short, in which case you might, after weeks of work, turn the assembler code back into C
Your sketch was long, in which case it would be virtually … impossible to turn it back into C
In the "short sketch" case, you are better off just rewriting from scratch. …
- 38.7k
3
votes
Problem: "stray '#' in program"
From the Instructable you linked:
matrix8x8.pde is a program in Processing to build your own displays.
You downloaded the Processing code, not the Arduino code. See above that:
cube8x8x8.pd …
- 38.7k
0
votes
Accepted
compare two hex files
The lines in a typical hex file include a VLI (variable length indicator). The hex files output from the IDE might have different lengths than those produced by avrdude. As a simple example:
File 1:
…
- 38.7k
1
vote
Why is my variable not getting updated?
I modified your code to produce a working example:
const unsigned long fiveMinutes = 20 * 1000UL;
unsigned long lastCheck = 0 - fiveMinutes;
unsigned long now = 0;
void setup ()
{
Serial.begin ( …
- 38.7k
2
votes
How do nested for loops work?
What you have there is a nested loop. The first for statement runs 8 times, incrementing r from 0 to 7. For each of those 8 iterations the second for statement runs, incrementing c from 0 to 7. Thus t …
- 38.7k
1
vote
Include Git tag (or SVN revision) in Arduino sketch?
A possibility would be to run a cron job that periodically (say, every minute) updates a .h file with the current commit ID from the branch, and include that in the sketch. …
- 38.7k
4
votes
Accepted
How to execute commands on Arduino (via PC) without touching the current sketch?
The simple thing would be for your sketch to read from the serial port continuously. … Or can I somehow detect from within the sketch code that there is a USB connection, and have that trigger the unlock? …
- 38.7k
5
votes
What exactly does the Arduino preprocessor do?
In case they are not, here is the first part of that answer:
This is how the IDE organizes your "sketch":
The main .ino file is the one of the same name as the folder it is in. … A side-effect of all this is that you can consider the main sketch (the .ino files) to be C++ to all intents and purposes. …
- 38.7k
2
votes
Existence of a non blocking and task yield framework for Arduino programming
My recommendation would be to simply code without needing blocking. I have examples here.
Petri Häkkinen coded a game - Toorum's Quest - without using any real-time library. That game (on a Uno) has …
- 38.7k
1
vote
Accepted
TMP36 probe reading 0 on analog
The image on the linked tutorial has the middle pin of the TMP036 going to the analog input, whereas you have it going to 5V, so that is not going to help one bit.
In other words, it is wired wrongly …
- 38.7k
2
votes
if statement does not work with fraction, but works with decimal equivalent
1/440 will be treated as an integer expression, returning zero.
To make it work, make one or both operands a floating-point type. In your case:
if(t >= (float)1 / 440){ //Fraction
t = 0;
}
Or:
…
- 38.7k
9
votes
What's taking up so much RAM in an almost empty sketch?
On this page about putting constant data into program memory I obsessively tracked down every last byte of memory used in a small sketch. … That particular sketch actually used even more RAM:
Free memory = 1702
So where did the 346 bytes go? …
- 38.7k
0
votes
Accepted
Separate ATmega 2560 - turn on a single LED - troubleshooting
You are saying that the LED lights if you write LOW to it.
I need to pull the output pin to LOW to make the LED work
That's exactly what you expect.
Since the other end of the LED is wired t …
- 38.7k
1
vote
Accepted
Take an Arduino or Teensy prototype to Mass production - Loading software onto microcontroller
Also, he said the other option would be to recode my Arduino sketch from scratch using an AVR code.
I don't see why that would be necessary, in any way. …
- 38.7k
1
vote
AES Simplified for Arduino - Having hard time achieving desired result
We've been trying for some time now from endless conversions to splitting up our plain text into chunks of 16 characters so that we can encrypt the message.
To address this question/issue, belo …
- 38.7k