20
votes
Accepted
Does an Arduino get worn out by too much command execution?
No, the code doesn't "wear out" the MCU. In general no matter what you are doing roughly the same level of activity is being performed. Even delay() does lots of work while it's "idling".
There are ...
- 106k
18
votes
Accepted
What are the traditional ways to optimize program memory usage?
What are the generally practiced methods for the optimization program
memory usage?
First, note you are searching for ways to lower SRAM memory. This contains global (variable) memory and heap space (...
- 13k
12
votes
Optimizing code for ATtiny10
As I stated in a comment, this device would be too small for me to
consider programming it using an Arduino core. I would rather stick with
the avr-libc and direct port manipulation:
#include <...
- 44.8k
7
votes
What are the traditional ways to optimize program memory usage?
I just want to add a single bullet to Michel Keijzers’ excellent answer:
think about every single item you are storing in memory and ask
yourself the question: do I really need to keep this in RAM?
...
- 44.8k
7
votes
Optimizing code for ATtiny10
If the button is pressed by a human and your clock is high enough (MHz range), you can use a trick and get rid of the RNG.
You can replace it with a free running counter like this:
unsigned char count ...
- 171
6
votes
Does an Arduino get worn out by too much command execution?
For a hobbyist:
About the only life limiting software related issue might be writing to the FLASH memory as fast as you can from inside a program. But few programs make use of variables that need to ...
- 7,503
6
votes
Does an Arduino get worn out by too much command execution?
It's not. Well, it might slowly wear out if you run it like 20 years....(like most other physical products)? At least it does not rely on code complexity but how many writing operation done in the ...
- 216
6
votes
Accepted
Does the compiled binary of a sketch include uncalled functions from a library?
In general only the functions actually used by your code are included in the final linkage of the binary.
However it's not always possible for the compiler to know what is used and what isn't.
In the ...
- 106k
6
votes
How to move a servo quickly and without delay function
The quickest way possible from LightON to LightOFF is simply servo1.write(lightOFF); without loops or delays, in one go; no need to do it degree by degree. For example:
int lightON = 180;
int lightOFF ...
- 1,795
5
votes
Accepted
Porting code from Arduino IDE to other IDEs - expected code size reduction
You don't need to abandon the Arduino IDE.
Let me quote from my forum post about sketch sizes.
Introduction
Every now and again this subject pops up on the Arduino forum. Why does it take 1000 bytes ...
- 38.8k
5
votes
Does an Arduino get worn out by too much command execution?
... (or generally any other micro-controller) ...
The other answers are great, but there is one small exception.
Ferroelectric RAM (FRAM) is a form of memory that combines the non-volatility of flash ...
- 17.7k
5
votes
Accepted
Storage usage of methods compared to copied code
It.... depends
A call to function involves a few things
Save the context
Move the parameter(s) to the appropriate registers
Enter the function
Execute
Eventually save the return value to a register
...
- 2,721
4
votes
Accepted
Const data optimisation for Arduino
This question is not really about the Arduino. It is about GNU C/C++ compiler optimizations.
By adding the keyword const the compiler can do a lot of optimization. One is that the value does not ...
- 7,979
4
votes
Is there a more elegant way to check highest / lowest sample data?
This is a variation on the struct idea with an object-oriented flavor.
If you put the current, low and high values of any sensor inside a
struct, you could also morph this struct into a class and ...
- 44.8k
4
votes
What are the traditional ways to optimize program memory usage?
What are the generally practiced methods for the optimization program memory usage?
(nb. as per Edgar's comment I emphasise that this is about using PROGMEM more efficiently.)
If you can replace ...
- 261
4
votes
Generate a true analog signal using Arduino
I see that MCP4725 uses Wire library with the default clock of 100,000 kb/sec.
At a rough estimation each call to MCP.writeDAC or MCP.getValue will be at least 32 bits long and you use three of them ...
- 359
4
votes
Accepted
How to cut down size of imported DigiKeyboard library
With input from @EdgarBonet, I looked into the functions used and it turned out that the String() function, I used once in my code, takes up about 3kB of space in the compiled program.
I ended up ...
- 105
3
votes
code optimazation 6x6 Matrix
You can use arrays to hold sets of row pin numbers or column pin numbers, which then allows use of for loops for pinMode() settings and for testing LEDs one after another, as shown in code below.
...
- 8,910
3
votes
Accepted
Array Addressing
No, but you can use a struct:
struct flags {
uint8_t power;
uint8_t jump3;
uint8_t jump7;
.... etc ....
};
struct flags myFlags;
myFlags.power = 1;
if (myFlags.jump3) {
.... ...
- 106k
3
votes
How to increase life of EEPROM?
If your data occupies only a small fraction of your EEPROM, you could use one of the wear leveling algorithms. The essence of these algorithms is to write to a different location each time, so writes ...
- 1,278
3
votes
Does an Arduino get worn out by too much command execution?
Probably not ... The Atmel chip might get warmer over time (even a delay does not prevent this), however if it has a possibility to release its heat I don't see a problem. But mostly only overclocking ...
- 13k
3
votes
Accepted
Need help optimizing snake game code for Arduino Nano
16x16 = 256
So there are 256 possible places to put a piece of snake.
The max length of the snake will be 256 (fill the board completely).
So if we take an array of bytes (0-255) that is 256 bytes ...
- 2,715
3
votes
Merging of two functions
Functions like
boolean Water_Level_Check_A(){
boolean Result = digitalRead(Water_Level_A);
return Result;
}
Are really overcomplicated. You're just calling one function and returning that ...
- 3,646
3
votes
Best practice to declare a 'static' text and save memory
The "traditional" way is to use PROGMEM and use const char * strings.
I don't use the "traditional" way. Instead I use some "helper" classes and macros that WString.h provides.
This does mean, ...
- 106k
3
votes
Accepted
FIXING BUG when Using Wire library to obtain compass heading
The problem comes from the low-pass filter you are using:
// Smoothing the output angle / Low pass filter
headingFiltered = headingFiltered*0.85 + headingDegrees*0.15;
This filter is designed to ...
- 44.8k
3
votes
I have made a Nano send 4 pot values to an Uno please help with code
If your goal is to "talk" to a computer vs. a human, then a format that can be parsed easily is better than one that is easy to read.
For example, you have:
I received: 255
I received: 247
I ...
- 1,045
3
votes
How do I create a code that lets me use an array of 10 thermistors on one arduino?
You haven't said which (of the many kinds) of "Arduino" you plan to use, but Uno being the most common, I'll assume that. You also haven't said why/whether you must use a particular ...
- 15.4k
3
votes
Optimizing code for ATtiny10
Are you sure the pins are correct?
Maybe use a smaller random number generator per https://arduino.stackexchange.com/a/18092/6628 ?
static uint8_t lfsr = 0x01;
const byte LFSR_MASK = 0x8e;
void setup(...
- 2,340
3
votes
Is there any way to efficiently code reading of four sensors and sending a serial output once it does detect a reading?
There are always other ways to code something (at least if it's non-trivial). What does 'efficiency' mean to you, in this case? If speed is a concern, increase the baud rate. Whenever at least one ...
- 15.4k
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