Questions tagged [code-optimization]
The process of improving the efficiency of a program such that is uses less memory and/or less computational time.
132 questions
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I need compact code to fit in memory
I feel a little like I am back in 1975 trying to fit my code in 4K of RAM.
I am writing some code for an ATTiny88, and the code is starting to get big, relatively speaking. I need to save every byte ...
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How to swap byte order?
Background
I'm reading a 24-bit ADC value into a uint32. Using SPI bus, here's the logic:
value = SPI.transfer(0); // read first 8 bits (MSB first)
value <<= 8; // shift ...
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Sampling rate for Adafruit LSM6DSOX and Arduino MKR WIFI 1010
Please let me know if this post has the wrong tags, I will make sure to change it.
My goal is to get the highest sampling rate possible from the Adafruit LSM6DSOX (6667Hz) using the Arduino MKR WIFI ...
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Optimizing code for ATtiny10
I'm trying to squeeze code onto an ATtiny10, but I'm just not getting there. I'm using 1060 bytes and only have space for 1024 bytes.
The code is simple enough; I need to read a button pin. If high it ...
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How do I create a code that lets me use an array of 10 thermistors on one arduino?
I am new to programming and am trying to create an array of 10 thermistors on one arduino. So far I have found a code for Temperature Sensor Using NTC Thermistor that is only for one thermistor. How ...
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How to optimize checking for specific string in a UART stream
I want to check for specific string (like "RecordStart") in a UART stream (115 200 baud 8N1) from a camera, to know when it is recording or not/if there is an SD. I am using an ESP32-WROOM-...
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best practice for performance: empty loop() when using interrupt?
I'm working on a little midi hardware project and I'm using attachInterrupt() to assign a callback function to an interrupt pin.
Nothing gets done in the loop function, so it looks like this:
void ...
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What are the traditional ways to optimize program memory usage?
While doing big projects using Arduino boards (Uno, Atmega328P MCU). I used to get warnings like this
Sketch uses 13764 bytes (44%) of program storage space. Maximum is 30720 bytes.
Global variables ...
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Is there any way to efficiently code reading of four sensors and sending a serial output once it does detect a reading?
I am actually wondering if there's a way to efficiently do this block of code. There are two things in my specifications and these are:
Four IR Sensors that detects blockage. Basically just to ...
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How to move a servo quickly and without delay function
Im trying to move a servo from one place to another while using the typical for loop you find in the servo's library example:
int lightON = 180;
int lightOFF = 90;
for (pos1 = lightOFF; pos1 <= ...
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How to cut down size of imported DigiKeyboard library
I'm working on a project with a Digispark ATTiny85, that performs keystrokes using the DigisparkKeyboard library (https://github.com/digistump/DigisparkArduinoIntegration/tree/master/libraries/...
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Set EEPROM from PC before program
I have been working on an arduino program, which has gotten rather large. I am close to hitting the 32k limit on Flash for my ATmega328p. I would like lower my program size by saving some of my many ...
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How can I declare an array of variable size (Globally)
I'd like to make three arrays of the same length. According to the documentation, Arrays must be defined as int myArray[10]; where 10 can be substituted for a known length (another integer), or filled ...
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Generate a true analog signal using Arduino
I am looking for a way to create a true analog output with the arduino uno. I am constantly reading an analog input on a0 pin, all i want to do is send the same signal as output. I know arduino ...
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Optimised random alphanumeric string generator
I'm trying to build arduino nonce generator, but the only thing I found is this question on arduino forum but I can't find out how to make it work for me. I checked and Serial.available() is always 0 ...
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