However, to answer your actual question, there is a more accurate alternative to delayMicroseconds (): the function _delay_us () from the AVR-libc is cycle-accurate and, for example. The interval is specified in microseconds, which may be an integer or floating point number, for more highly precise timing. The standalone would give me the required functionality using the delay() function for delays between 3 milliseconds and 1 millisecond. Essa função funciona bastante precisamente para valores maiores que 3 microssegundos. 967295 microSeconds. The following program demonstrates the problem. One is using the not so recommended delay() function and the other way is using millis(). I'd like to see the code, please, of an analog reading taking 100us and the code used to measure the time of the ADC reading. Hello I am using a TB6600 stepper driver using the code example below and it works fine but I need a way for it to work without using delayMicroseconds, because I don't want delays when I eventually start adding other functions. Set the duty cycle for each PWM signal. </p> </div> <div dir="auto"> <p dir="auto">Currently, the largest value that. Assumes a 8 or 16 MHz clock. SofwareSerial bit banging) by disabling interrupts during its core delay code. Except This Statement. **This code works in Arduino with the delayMicroseconds () function. การหน่วงเวลา. They use the same 3 wire connector, ground. This. 024 milliseconds, then incrementing by 2 (rather than 1) every 41 or 42 ticks, to pull it back into synch; thus some millis () values are skipped. However, there’s a big problem: its maximum size ends up being too small for long-term programs! To see how that works, consider: the largest value that micros () can produce is 2^32-1, or 4,294,967,295. h> PinFlasher flasher (13); // set led on pin 13 as the output and turns it off, i. The digitalWrite () function takes a substantial portion of your 20. Below in the function oneMillisecondDelay, delay (1) does generate a one millisecond delay, but in the function tenMillisecondDelay, delay (10) generates only a two millisecond delay. This could change in future Arduino releases. Timing chart for signal input and output for micro-spectrometer Hamamatsu. Provide details and share your research! But avoid. We can also use variables in the delay function. txt files . Diese Funktion arbeitet im Bereich von 3 Mikrosekunden und mehr sehr genau. Não é possível assegurar que delayMicroseconds () irá funcionar corretamente para valores menores. 0 CH340/ATmega328P、Nano V3. Instead, set a flag and put the loop in the Arduino sketch’s loop()-method. I have been working with an Arduino and have encountered a very strange problem. We’ll be using the DWT and STM32. The timer setup is documented in wiring. Currently, the largest value that will produce an accurate. millis () will wrap around to 0 after about 49 days (micros. 本Lessonは【計量・重量センサ】について。2つの部品から構成。ロードセル、ADコンバータ。」ロードセルは量やトルクなどを検出するセンサ。アルミ起歪体にひずみゲージがホイートストンブリッジ回路構成で貼りつけられており荷重に応じた電圧をリニアに出力します。このセンサとArduinoを. Não é possível assegurar que delayMicroseconds () irá funcionar corretamente para valores menores. There are a thousand microseconds in a millisecond and a million microseconds in a second. Pito's answer works, but more importantly, do you understand why it works? Also, the #include directive was never intended to be used with source code files (e. e: 10:50:30. While delayMicroseconds () directly uses the value of the hardware timer, delay () and millis () are handled by the ISR. Usage. If ESP Timers prove problematic, then I like your assembler-delay idea. #include <PinFlasher. Wir können nicht garantieren, dass delayMicroseconds () genau für kürzere Verzögerungszeiten funktionieren. Duemilanove and Nano. My code works but my minimum delay is 880ns (due too the interrupt latency maybe?) and i can only add 1us by 1us. I have been working on an LED controller that uses a Return-to-zero protocol that requires me to send high and low signals at delays of 0. 3. I've seen arduino only accepts delayMicroseconds( a ), where a is an integer and a>=1. After that, you can use vTaskDelay (. You can call micros () to find the elapsed time to microsecond resolution. I need to get rid off delays cuz the readings can't be late. 1 minute = 60 seconds. You can use delayMicroseconds to delay short periods. refer to writeMicroseconds () Writes a value in microseconds (uS) to the servo, controlling the shaft accordingly. The Arduino Servo class keeps sending the last pulse every 20ms. Blink without Delay - Arduino Tutorial. Graphs: [Attached. Arduinoでus（マイクロ秒）間隔のパルスを作る方法 背景 loopでdelayMicroseconds関数を利用してパルスを作っていたところ、同時に別のタスクもさせたくなったので、loopの外部でパルスを作る方法を探してみました。. Wir können nicht garantieren, dass delayMicroseconds () genau für kürzere Verzögerungszeiten funktionieren. The delayMicroseconds () function will provide accurate delays as may be needed for some types of applications (e. Asking for help, clarification, or responding to other answers. You will need: Arduino. On standard servos a parameter value of 1000 is fully counter-clockwise, 2000 is fully clockwise, and 1500 is in the middle. Language. No entanto, certas coisas continuam a acontecer enquanto a função delay () está controlando o microcontrolador, porque a função delay não desativa. Using Arduino Programming Questions. For a more complete version that can handle various clock frequencies, see the delayMicroseconds() function from the Arduino AVR core. delay (1) = 494 Hz at flow computer. For delays longer than a few thousand microseconds, you should use. What I am doing is I'm trying to write a sample program to make the arduino turn a light on and off on pin 6. The value is unsigned long (4-bytes or 32-bits). This could change in future Arduino releases. priority (number);AUTHOR: Jacob Hylén. There is a more important difference between the two functions other than the unit of time the accept as parameters the function delay() calculates time using the time interript of the arduino. Viewed 4k times. I've tried using other available libraries but they require inputs of 2 or 4 pin connections when I am using 3. There is hardware PWM on six output pins, but if you meant to make a square wave in software, the delay(int milliseconds) won't delay for less than one millisecond. Improve this answer. As soon as you need to do a few things at the same time, you. While these functions are easy, your program can not do other work during the delay. 5 microsecond wide pulse every 249. I've read a posts about possible interrupts by kernel,. I encountered the following problem when using it: if I use a value such as delay_us(20), it doesn't work! Driving a pin (from high to low and vice. delayMicroseconds just counts. So 1 cycle equals 1/1000000 seconds or 1us. delay (5000) - means delay of 5 sec. How the HC-SR04 Ultrasonic Distance Sensor Works? It emits an ultrasound at 40 000 Hz which travels. do the other actions. The Time1. MartinL October 22, 2015, 8:47am 2. This could change in future Arduino releases. Before we overflow (about 71 minutes and. We’ve seen the HAL_Delay () utility in the built-in HAL libraries by STMicroelectronics. } blocks the loop. Good day, i recently bought an UNO so i can learn some arduino programming. g. It has a time limit of approximately 50 days, after this time, it will overflow and go back to zero. *; Arduino arduino; int speakerOut = 11;Again, the problem is with the arithmetic, not with the delay () function. 3 did NOT have any type of guaranteed resolution whatsoever. There are 1,000 microseconds in one millisecond, and 1 million microseconds in one second. This means that the functions’ return values will start all over from zero. Pauses the program for the amount of time (in microseconds) specified as parameter. delayMicroseconds (delay) 함수는 매개 변수 delay에 주어진 값만큼 us (마이크로세컨드: microsecond) 단위로 대기하는 기능을 제공합니다. TWO - a blocking delay, but one that does NOT use timers (timer0, timer1, or timer2) and is able to work with libraries which have a lot of timing issues or which corrupt millis() or timer0 counts. 8. c The Arduino micros () is a function that returns to you the time elapsed (in microseconds) since the Arduino board was powered up. Diese Zahl läuft nach ca. Posts: 4689. I made my codes and I notice that something wrong in my output. Fungsi delayMicroseconds sama persis dengan delay (ms), hanya saja pemilihan tipe untuk penulisan program tertentu yang. With delayMicroseconds() you can provide a number of microseconds to sleep. I have a feeling the datatype associated with "delay" may be integer or. It accepts a single integer as an argument. 7 days. Pauses the program for the amount of time (in microseconds) specified as parameter. Currently, the largest value that will produce an accurate delay is 16383; larger values can produce an extremely short delay. delay ()함수의 매개변수는 ms로 1/1,000 초였죠. 0 License. You should see different times if you wait for the serial output to finish:Hello, Currently I am controlling my Arduino code via NI Visa from Labview. If the ISR is getting executed during your measurement, then the execution time of the ISR will. It works on processor cycles. If I take 64 readings with a 1ms interval for stability that's 64 milliseconds. See full list on deepbluembedded. The problem is that as of now the hardware is removing a few milliseconds on the delay and so the time in the server ends up being p. ให้อัพโหลดโค้ดตัวอย่างข้างบนลงบอร์ด Arduino คำสั่ง delayMicroseconds จะหน่วงเวลา 1000 us หรือ 1000/1,000,000 วินาที ค่าจะวิ่งเร็วมากๆThe list of supported commands for ATtiny85 are pinMode () digitalWrite () digitalRead () analogRead () analogWrite () shiftOut () pulseIn () millis () micros () delay () delayMicroseconds () Logged. I did need a multiple MHz blink, and thus a nanosecond delay. esp_timer set of APIs provides one-shot and periodic timers, microsecond time resolution, and 64-bit range. all was working well until I tried to use the OneWire library. ミリ秒には1000マイクロ秒、1秒には100万マイクロ秒があります。. Don't delay more than 500 µs or so, or you'll miss a timer overflow. h). On the boards from the Arduino Portenta family this function has a resolution of one microsecond on all cores. 次に、Arduinoがプログラムを指定した時間だけ止める関数を確認していきます。 この関数は、入門編のスケッチにもよくでてきます。 こちらの関数は2つあります。 お馴染みの関数です。 delay()関数; delayMicroseconds()関数 delay()関数The SmartDelay class for non blocking delays in arduino sketches. Arduino: What is the difference between delay() and delaymicroseconds()Helpful? Please support me on Patreon: than. In the example above code line delay (86400000); and delays (3600000); find. begin (9600); } void loop () { Serial. ino" file with it, as a second tab. delayMicroseconds関数 delayMicroseconds関数は指定した時間(μs)プログラムを止めます。 使用例 Arduino IDEで使用するdelay関数の使い方は以下の通りです。試しにこのプログラムをArduino UNOで実行すると、13ピンのLEDが蛍の様に不規則に明るさが変化します。10. The delay () function allows you to pause the execution of your Arduino program for a specified period. SPI in STM32F103C8. When you call delay, it keeps the timer running sending pulses during the wait. Note that some manufactures do not follow this. inotplayingrn: duration = pulseIn (echoPin, HIGH); Please READ the documentation on the pulseLn () function call. I read other answers before asking this question, but they rely on the time module, which prior to Python 3. 0, if you wanted 50 milliseconds, it would be 0. If you're using an Uno, then the timing standard of 0. However, to answer your actual question, there is a more accurate alternative to delayMicroseconds (): the function _delay_us () from the AVR-libc is cycle-accurate and, for example. Then I thought to make the delay smaller so I changed delay(1) to delayMicroseconds(100) and it did crash again. Arduino millis () Function. More knowledgeable programmers usually avoid the use of delay () for timing of events longer than 10’s of milliseconds unless the Arduino sketch is very simple. Description. Which produces ~11. 5hardwarearduinoavrootloadersoptibootMakefile. As far as I understand the “delayUs( uint32_t delay )” has a minimum resolution of 500 microseconds. h >. millis () is incremented (for 16 MHz AVR chips and some others) every 1. MartinL October 22, 2015, 8:47am 2. The Arduino programming language Reference, organized into Functions, Variable and Constant, and Structure keywords. Just like delay () has a microsecond-version called delayMicroseconds (), millis () has micros (). 5ms. 5 uS between each leading edge. And there are 1,000 milliseconds in a second. Using simple code to write out the microseconds every delay(1000) I get the following: Zero - Delay Time: 20876. Note that, there are a few cycles between the delays, so as you get shorter timeperiods, you will get less and less accuracy. (or Lo and back Hi) Usual fast way is Direct Port Manipulation (vs digitalWrite. For example here are the counter-timer input frequencies and periods after pre-scaling, for an ATMega2560's counter-timer 2, and a basic clock rate of 16MHz. 967295 seconds. As we want the delay of 1 microsecond, the timer frequency must be (1/ (1 us)), i. Servo - writeMicroseconds () Writes a value in microseconds (us) to the servo, controlling the shaft accordingly. Is there a better method, like to create separate module for counting in microseconds using micros timer?done with delay (). Viewed 2k times. Description. On a standard servo, this will set the angle of the shaft. Der zurückgegebene Wert ist immer ein Vielfaches. All variables used to hold millis or micros should be unsigned long. do the other actions. h) will allow you to busy-wait for a. 1 hour = 60 minutes. Even a simple loop causes it to crash: ELF file SHA256: 0000000000000000 Backtrace: 0x4008860c:0x3ffbf8f0 0x40088889:0x3ffbf910 0x401300bc. When flashing the same code on an ATtiny85 with 1 MHz the us-delay is factor 8 too long. In most examples you need to use delay techniques in the java environment but these all operate on the order of milliseconds (1000 microseconds). There are a thousand microseconds in a millisecond and a million microseconds in a second. hw_timer_t * timerBegin(uint32_t frequency); frequency select timer frequency in Hz. Description. Now, the ESP32 is flashed with the new firmware. But for some reason Timer0 is being disabled, and can't use the delay(), millis() and delayMicroseconds(). This number overflows i. Duemilanove and Nano), this function has a resolution of four microseconds (i. In this tutorial, I’ll show you a couple of methods to implement STM32 delay functions both in microseconds and milliseconds. delayMicroseconds() Description. On standard servos a parameter value of 1000 is fully counter-clockwise, 2000 is fully clockwise, and 1500 is in the middle. Serial communication that. Pauses the program for the amount of time (in microseconds) specified as parameter. This could change in future Arduino releases. It would be good to have a version that works by actually allowing the scheduler to switch to other tasks on fast processors, and. On the arduino, I would use an interrupt to detect the pin change to high. Wir können nicht garantieren, dass delayMicroseconds () genau für kürzere Verzögerungszeiten funktionieren. There are a thousand microseconds in a millisecond, and a million microseconds in a second. About . They seem incredibly poor in accuracy/consistency and I'm struggling to understand why. For delays longer than a few thousand microseconds, you should use delay () instead. This number will overflow (go back to zero), after approximately 70 minutes. 1ミリ秒以上. The argument decides how much amount of time we want to pause the code. 1. You should explicitly declare your delay value as an. BC Robotics Inc. OUTPUT); // sets the digital pin as output } void loop() { digitalWrite(outPin, HIGH); // sets the pin on delayMicroseconds(50); // pauses for 50 microseconds digitalWrite(outPin, LOW); //. These last four options are achieved by various combinations of the RS1 and RS2 control bits. delay function does not return any values. This could change in future Arduino releases. There are a thousand microseconds in a millisecond, and a million microseconds in a second. Yes, delay (8000); in your void timeDelay () {. Returns the number of microseconds since the Arduino board began running the current program. Pauses the program for the amount of time (in microseconds) specified as parameter. . 19us pulses. We need to provide the HC-SR04 with a fitting trigger signal. here's what I found: This sketch will output 95. This function works very accurately in the range 3 microseconds and up. 024 milliseconds, then incrementing by 2 (rather than 1) every 41 or 42 ticks, to pull it back into synch; thus some millis () values are skipped. Arduino Due delay(1) vs delaymicroseconds(1000) #217174. Hi i'm new to AVR assembly language so i was trying to get delay function to create 1 ms , 100us, and 1us delays to do that i need to figure out what to replace nop's with below here (mainboard arduino uno r3 ATmega328 Thank you. Certain things do go on while the delay () function is controlling the Atmega chip, however, because the delay function does not disable interrupts. To do that, you need to make an output pin go Hi & Lo. If your program requires executing actions with a resolution higher than one millisecond, then use micros (). Any delay over 1024us will include timer0 interrupts, and in your example you'll also have serial interrupts. This could change in future Arduino releases. 83 microsecond window to execute. unsigned long startMillis = millis (); while (millis () - startMillis < LONG_DELAY_MS); This will delay up to approx. This function works very accurately in the range 3 microseconds and up. 0 software and avr-gcc 4. Arduinoリファレンスの文章は Creative Commons Attribution-Share Alike 3. . As you can see I measure the time between two instants using esp_timer_get_time() (this funcion returns an uint64_t with the number of microseconds starting from the power up). Serial communication that appears. Basically, I found out that delayMicroseconds(x) delays (on Arduino UNO, 16MHz) 7 Clock cycles for (x = 0, 1) 14 Clock cycles Short for (x >= 2) I noticed a too quick delay on 'x = 2' case. I have used the following code to calculate distance and it works perfectly. Every 500us is a “system. Assumes a 8 or 16 MHz clock. Description. Se envía un tren de pulsos de un periodo de aproximadamente 100 microsegundos. I really don’t know how the Arduino IDE did compile that succesfully… In the meantime, add. system June 29, 2008, 3:58am 1. delayMicroseconds () deaktiviert ab Arduino 0018 keine Interrupts mehr. A typical servo uses 1500 microseconds as a center position signal. More knowledgeable programmers usually avoid the use of delay () for timing of events longer than 10’s of milliseconds unless the Arduino sketch is very simple. . To generate three independent 20 KHz PWM signals with different duty cycles on an Arduino Due, you can use the built-in hardware PWM support. Corrections, suggestions, and new documentation are very welcomed. The drawback you get when using micros () is that the time variable overflows. Then in the loop we’re going to use the Serial. Erfahrene Programmierer vermeiden normalerweise die Verwendung von delay () für das Timing von Ereignissen, die länger als 10 Millisekunden sind, es sei denn, der Arduino-Sketch ist sehr einfach. 0592MHz with the Arduino environment. There is no real advantage to use unsigned. At one million ‘ticks’ per second, we can do. An interrupt service routine should be as light as possible so that it. This function works very accurately in the range 3 microseconds and up. 今回はArduinoの速さについてです。目次は以下。 delay()じゃ遅すぎる tone()関数で周波数を測定 delaymicroseconds()関数の場合 まとめ delay()じゃ遅すぎる 手軽で使えるマイコン、Arduino。私も互換ボードを一枚持っております。 ELEGOO Arduino用 Nanoボード V3. 1 and arduino-0022 give me 1. 0 License. Currently, the largest value that will produce an accurate delay is 16383; larger values can produce an extremely short delay. Certain things do go on while the delay () function is controlling the Atmega chip, however, because the delay function does not disable interrupts. This could change in future Arduino releases. Two Potentiometers are also connected with STM32 (PA0) and Arduino (A0) to determine the sending values (0 to 255) from master to slave and slave to master by varying the potentiometer. Certain things do go on while the delay () function is controlling the Atmega chip however, because the delay function does not disable interrupts. Diese Funktion arbeitet im Bereich von 3 Mikrosekunden und mehr sehr genau. Values under 1950 are. 1. I think this problem might be that the delaymicroseconds in Arduino with the milliseconds in Labview. Precision of delayMicroseconds () Using Arduino Programming Questions. "delay_ms%=: nop ; code to replace nop " "delay_100us%=: nop ; code to replace nop " "delay_1us%=: nop ; code. The idea is to: Configure the built-in timers to generate a 20 KHz PWM signal. Currently, the largest value that will produce an accurate delay is 16383. The millis () function counts in milliseconds and starts over from the beginning every 50 days. I would like to toggle an output pin in the order of microseconds so use the function delayMicroseconds. micro có kiểu dữ liệu là unsigned int. Feb 21, 2016 at 19:39. Internally, esp_timer uses a 64-bit hardware timer, where the implementation depends on the target. jaainaveen February 21, 2019, 5:29am 1. บอร์ด Arduino Uno R3 . This example delays by 500ms: esp-idf-equivalent-to-arduino-delay. **This code works in Arduino with the delayMicroseconds () function. So is there a way I can implement a delay of 1us without using these functions? Thanks in advance 🙂 The Arduino Mega would give me the required functionality using either the delay() or the delayMicroseconds() function for delays between 3000 microseconds to 600 microseconds. jaainaveen February 21, 2019, 5:29am 1. Connect the Trig pin to digital pin 9 on the Arduino. It is likely that the number being passed to 'delay' is being interpreted as an int. The argument decides how much amount of time we want to pause the code. For example, with the Particle Photon you can use micros () to get the exact number of microseconds since 1970-01. Plenz September 19, 2015, 9:45am 1. delayMicroseconds limitation. This could change in future Arduino releases. Still, interrupts (e. The delay () function does not accept float values and therefore is always rounding to 1 or 0, forcing my piezo buzzer to only play one note regardless of the inputted frequency and duration. Continuing to loop is very important if part of your project is 'listening' for. g. We cannot assure that delayMicroseconds will perform precisely for smaller delay-times. serial. Copy and paste the following code into. I mark it in the neighborhood of about 6 microseconds. The digitalWrite () function takes a substantial portion of your 20. ザ・ delayMicroseconds () 関数は単一の整数（または数値）引数を受け入れます。. The Arduino programming language Reference, organized into Functions, Variable and Constant, and Structure keywords. This could change in future Arduino releases. I want to make a task that constructs and sends infrared commands. 0 Licenseの下でライセンスされています. This page is also. I am using the HC-SR04 ultra sound sensor for Arduino. void setup () { Serial. More knowledgeable programmers usually avoid the use of delay () for timing of events longer than 10’s of milliseconds unless the Arduino sketch is very simple. delay (ms) only delays for about 96% of the requested time on Pico and Nano RP2040. There are a thousand microseconds in a millisecond, and a million. Yes you can write delay (25200000UL) and it will delay for 7 hours. Duemilanove and Nano. 2. There are a thousand microseconds in a millisecond, and a million microseconds in a second. Pauses the program for the amount of time (in microseconds) specified as parameter. If you need better resolution, micros () may be the way to go. This function works very accurately in the range 3 microseconds and up to 16383. For delays longer than a few thousand. So, if I want all 20 degrees advance then my pot is set to 0 and that is translated into delayMicroseconds(0). Comparing SPI bus in Arduino & STM32F103C8 Blue Pill board, STM32 has 2 SPI bus in it while Arduino Uno has one. Its hard to see exactly where the time difference is due to not having a scope but I am running an LED. Description. But I'm wondering, is it worth doing the same thing for (for exemple) delayMicroseconds( 1500 ), or even delayMicroseconds( 2 ) ? That depends on how often delayMicroseconds() is used, and what impact the delay has on your code. Arduino-delayMicroseconds（）関数. This demonstrates that your board is working by blinking an LED, typically the on-board LED attached to pin13 but it has a problem. I would want a Timer Interrupt for the task you describe. 0. LAC timer is used for ESP32. The Arduino programming language Reference, organized into Functions, Variable and Constant, and Structure keywords. 25 and 0. The minimum duration for delay() is 1 millisecond, so if you need to sleep for only 400 microseconds, here you have a new solution. On a standard servo, this will set the angle of the shaft. This could change in future Arduino releases. This could change in. You could hand-code the delay. I have downloaded board files into Arduino to enable me to program the attiny 25/45/85/chips at 1Mhz or 8Mhz. 2 - LEDs, I used one red and one green. So is timer 2 responsible for the delay() and delaymicroseconds() on mega? No, Timer0 is used on the mega for millis() and micros(). @16Mhz, there are 16 instructions per microsecond. Click the "Timer2_Counter_Basic_Example. This tutorial is a simple sketch and circuit to show how this is done. While delayMicroseconds() directly uses the value of the hardware timer, delay() and millis() are handled by the ISR. ) See the delayMicroseconds(int microseconds) for much shorter delays. The datasheet of this chip says that the width of pulse on WE pin to write onto the. So we can count up to 49. delayMicroseconds () is a cycle-counting loop, so it doesn't include any time taken by background functions like interrupts. TWO - a blocking delay, but one that does NOT use timers (timer0, timer1, or timer2) and is able to work with libraries which have a lot of timing issues or which corrupt millis() or timer0 counts. With Arduino you can do this with the millis () function, but that resets (overflow) every 16666 milliseconds. 71 days [4,294,967,295/. Não é possível assegurar que delayMicroseconds () irá funcionar corretamente para valores menores. On 16 MHz Arduino boards (e. If you add a delay in the ISR, and the buffer of the UART gets full, it will overflow and you miss bytes. On the boards from the Arduino Portenta family this function has a resolution of one microsecond on all cores. compare if currentMillis-pressMillis > 8000, if then shut the led. パラメータの単位はマイクロ秒です。. Breadboard. (Any fraction like 0. Pauses the program for the amount of time (in microseconds) specified as parameter. Just like delay () has a microsecond-version called delayMicroseconds (), millis () has micros (). Aprender a usarlas cor. The delayMicroseconds () won't let me control multiple lamps, so I want to replace it with micros () (code below). The Arduino Zero uses its system ticker to generate delay(), delaymicroseconds(), millis() and micros(). The maximum value of an unsigned long variable can be 2 32 – 1 or 4,294,967,295. I am using an UNO for my project. However I would like to get a step up and simulate higher frequencies, up to 10000 Hz. The idea behind is that compile-time constant expressions will be eliminated by compiler. There are a thousand microseconds in a millisecond, and a million microseconds in a second. For my project I need to measure time in nanosecond fineness. Certain things do go on while the delay () function is controlling the Atmega chip, however, because the delay function does not disable interrupts. Currently, the largest value that will produce an accurate delay is 16383. 1밀리초는 1000 마이크로 초, 1초는 100만 마이크로 초. To change it unblocking you must in the loop, in each round: if btn pressed store the pressMillis, lit the led. The Arduino can count and measure time by utilizing the micros () or millis () functions.