Questions tagged [performance]
The performance tag has no summary.
34 questions
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ESP-IDF logging library slows down ISR processing
I'm hacking a project with ESP32-WROOM module. I'm running some timers with alarms along with some peripherals triggering ISRs. In the ISR routine I'm sending events to a queue, and receiving them in ...
- 103
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Arduino Nano is performing really slowly, even though the calculations are simple and there are no delays
I'm working on a tiny ping-pong game based on Arduino Nano. Its modes are "person vs person" and "person vs computer" (the computer just tries to keep its racket at the same Y ...
- 143
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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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UDP Packet Loss
I have an application on a PC that sends 10 UDP packets to an Arduino Portenta board. When sending packets with no delay, half of them are lost. Wireshark shows the packets are correctly sent by the ...
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Hardware implementation of trigonometric functions? [closed]
Is anybody aware as to whether there are any modern microcontrollers that have hardware implementations of trigonometric functions? According to my understanding, modern CPUs have basic maths ...
- 101
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What is the overhead of a saturated serial connection at 256k baud?
I have am putting together multiple arduinos on a RS485 network (connected to Rx/Tx on the arduino and using Serial - connection via one of these https://www.ebay.co.uk/itm/272929871278) - RS485 ...
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363
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Asymmetric encryption on a Teensy?
I want to monitor an input and then send the information in an encrypted way that can't be easily unlocked even if a malicious actor gets access to the device itself. I'm new to using the Teensy ...
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Having a bunch of global variables or calculate them on the go on an Arduino, as far as memory is concerned
So I'm new in the arduino world but I have a grasp of object oriented programming, and decided to write a little library for running games on an arduino mega using a display. My question is, I'm ...
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Reliably using analogRead as a compact digitalRead
My goal is to reduce pins being used for micro-controllers with limited pins, or projects requiring a few different digital input values.
How I intend to do so is by using ADC pins to gather four ...
- 167
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I have three load cells can I sum all the three into Arduino to be one output? If yes how?
I am doing stand thrust and I have three load cells to measure the force. I would like to know if I can sum them to gather into the Arduino or I should use a junction box.
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Reduce time between two consecutive SPI transfers on ESP32
I'm trying to drive an external DAC via SPI interface using ESP32 chip. But I cannot achieve the desired speed (>1M transfers/sec, each transfer consists of 16bits). The reason is not the SPI speed ...
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Use of "static" with "RTClib"
I've got a question concerning the Arduino library "RTClib" by Adafruit and the use of the word "static".
Here you can see an excerpt from the example provided for the pcf8523 real-time clock:
#...
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2
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483
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Difference in increment & decrement loop execution speed
I was experimenting with for loops when I noticed that a simple increment loop executes faster than a decrement loop. I can't think of any reason why it should be like that. Is there something in my ...
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Why does Arduino IDE take so long to open?
I have Arduino IDE, version 1.8.10 (Windows 10 x64, 8GB RAM, i5-7200 @2.5GHz) on a network drive mapped to D:, on a 100Mbit wired network and fast file server.
If I navigate to the network shared ...
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real-time reading of a quadrature encoder at full resolution with only one interrupt on ATmega328
I want to read a quadrature rotary encoders at full resolution with only one interrupt on Arduino Nano (ATmega328). So I found out that we can use XOR to reach a full resolution:
Where pin 3 ...
- 143