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# ESP8266TimerInterrupt Library
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[](https://www.ardu-badge.com/ESP8266TimerInterrupt)
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||||
[](https://github.com/khoih-prog/ESP8266TimerInterrupt/releases)
|
||||
[](https://github.com/khoih-prog/ESP8266TimerInterrupt/blob/master/LICENSE)
|
||||
[](#Contributing)
|
||||
[](http://github.com/khoih-prog/ESP8266TimerInterrupt/issues)
|
||||
|
||||
<a href="https://www.buymeacoffee.com/khoihprog6" title="Donate to my libraries using BuyMeACoffee"><img src="https://cdn.buymeacoffee.com/buttons/v2/default-yellow.png" alt="Donate to my libraries using BuyMeACoffee" style="height: 50px !important;width: 181px !important;" ></a>
|
||||
<a href="https://www.buymeacoffee.com/khoihprog6" title="Donate to my libraries using BuyMeACoffee"><img src="https://img.shields.io/badge/buy%20me%20a%20coffee-donate-orange.svg?logo=buy-me-a-coffee&logoColor=FFDD00" style="height: 20px !important;width: 200px !important;" ></a>
|
||||
|
||||
---
|
||||
---
|
||||
|
||||
## Table of Contents
|
||||
|
||||
* [Important Change from v1.6.0](#Important-Change-from-v160)
|
||||
* [Why do we need this ESP8266TimerInterrupt library](#why-do-we-need-this-esp8266timerinterrupt-library)
|
||||
* [Features](#features)
|
||||
* [Why using ISR-based Hardware Timer Interrupt is better](#why-using-isr-based-hardware-timer-interrupt-is-better)
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||||
* [Currently supported Boards](#currently-supported-boards)
|
||||
* [Important Notes about ISR](#important-notes-about-isr)
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||||
* [Changelog](changelog.md)
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||||
* [Prerequisites](#prerequisites)
|
||||
* [Installation](#installation)
|
||||
* [Use Arduino Library Manager](#use-arduino-library-manager)
|
||||
* [Manual Install](#manual-install)
|
||||
* [VS Code & PlatformIO](#vs-code--platformio)
|
||||
* [HOWTO Fix `Multiple Definitions` Linker Error](#howto-fix-multiple-definitions-linker-error)
|
||||
* [HOWTO Use PWM analogWrite() with ESP8266 running Timer1 Interrupt](#howto-use-pwm-analogwrite-with-esp8266-running-timer1-interrupt)
|
||||
* [1. ESP8266 has only 2 hardware timers, named Timer0 and Timer1](#1-esp8266-has-only-2-hardware-timers-named-timer0-and-timer1)
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||||
* [2. ESP8266 hardware timers' functions](#2-esp8266-hardware-timers-functions)
|
||||
* [3. How to use PWM analogWrite() functions while using this library](#3-how-to-use-pwm-analogwrite-functions-while-using-this-library)
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* [More useful Information](#more-useful-information)
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||||
* [Usage](#usage)
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* [1. Using only Hardware Timer directly](#1-using-only-hardware-timer-directly)
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* [1.1 Init Hardware Timer](#11-init-hardware-timer)
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* [1.2 Set Hardware Timer Interval and attach Timer Interrupt Handler function](#12-set-hardware-timer-interval-and-attach-timer-interrupt-handler-function)
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* [1.3 Set Hardware Timer Frequency and attach Timer Interrupt Handler function](#13-set-hardware-timer-frequency-and-attach-timer-interrupt-handler-function)
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* [2. Using 16 ISR_based Timers from 1 Hardware Timer](#2-using-16-isr_based-timers-from-1-hardware-timer)
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* [2.1 Important Note](#21-important-note)
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* [2.2 Init Hardware Timer and ISR-based Timer](#22-init-hardware-timer-and-isr-based-timer)
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* [2.3 Set Hardware Timer Interval and attach Timer Interrupt Handler functions](#23-set-hardware-timer-interval-and-attach-timer-interrupt-handler-functions)
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* [2.4 Set One-Shot Hardware Timer Interval](#24-set-One-Shot-hardware-timer-interval)
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* [Examples](#examples)
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* [ 1. Argument_None](examples/Argument_None)
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||||
* [ 2. **Change_Interval**](examples/Change_Interval).
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* [ 3. ISR_RPM_Measure](examples/ISR_RPM_Measure)
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* [ 4. RPM_Measure](examples/RPM_Measure)
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* [ 5. SwitchDebounce](examples/SwitchDebounce)
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* [ 6. TimerInterruptTest](examples/TimerInterruptTest)
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* [ 7. ISR_16_Timers_Array](examples/ISR_16_Timers_Array)
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* [ 8. ISR_16_Timers_Array_Complex](examples/ISR_16_Timers_Array_Complex)
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* [ 9. ISR_16_Timers_Array_OneShot](examples/ISR_16_Timers_Array_OneShot) **New**
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||||
* [10. multiFileProject](examples/multiFileProject) **New**
|
||||
* [Example Change_Interval](#example-change_interval)
|
||||
* [Debug Terminal Output Samples](#debug-terminal-output-samples)
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||||
* [1. TimerInterruptTest on ESP8266_NODEMCU_ESP12E](#1-timerinterrupttest-on-esp8266_nodemcu_esp12e)
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||||
* [2. Change_Interval on ESP8266_NODEMCU_ESP12E](#2-change_interval-on-esp8266_nodemcu_esp12e)
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||||
* [3. ISR_16_Timers_Array on ESP8266_NODEMCU_ESP12E](#3-isr_16_timers_array-on-esp8266_nodemcu_esp12e)
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||||
* [4. ISR_16_Timers_Array_Complex on ESP8266_NODEMCU_ESP12E](#4-isr_16_timers_array_complex-on-esp8266_nodemcu_esp12e)
|
||||
* [5. ISR_16_Timers_Array_OneShot on ESP8266_NODEMCU_ESP12E](#5-ISR_16_Timers_Array_OneShot-on-esp8266_nodemcu_esp12e)
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||||
* [Debug](#debug)
|
||||
* [Troubleshooting](#troubleshooting)
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||||
* [Issues](#issues)
|
||||
* [TO DO](#to-do)
|
||||
* [DONE](#done)
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||||
* [Contributions and Thanks](#contributions-and-thanks)
|
||||
* [Contributing](#contributing)
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||||
* [License](#license)
|
||||
* [Copyright](#copyright)
|
||||
|
||||
---
|
||||
---
|
||||
|
||||
### Important Change from v1.6.0
|
||||
|
||||
Please have a look at [HOWTO Fix `Multiple Definitions` Linker Error](#howto-fix-multiple-definitions-linker-error)
|
||||
|
||||
|
||||
---
|
||||
---
|
||||
|
||||
### Why do we need this [ESP8266TimerInterrupt library](https://github.com/khoih-prog/ESP8266TimerInterrupt)
|
||||
|
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### Features
|
||||
|
||||
This library enables you to use Interrupt from Hardware Timers on an ESP8266-based board.
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||||
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||||
As **Hardware Timers are rare, and very precious assets** of any board, this library now enables you to use up to **16 ISR-based Timers, while consuming only 1 Hardware Timer**. Timers' interval is very long (**ulong millisecs**).
|
||||
|
||||
Now with these new **16 ISR-based timers**, the maximum interval is **practically unlimited** (limited only by unsigned long miliseconds) while **the accuracy is nearly perfect** compared to software timers.
|
||||
|
||||
The most important feature is they're ISR-based timers. Therefore, their executions are **not blocked by bad-behaving functions / tasks**. This important feature is absolutely necessary for mission-critical tasks.
|
||||
|
||||
The [**ISR_Timer_Complex**](examples/ISR_Timer_Complex) example will demonstrate the nearly perfect accuracy compared to software timers by printing the actual elapsed millisecs of each type of timers.
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||||
|
||||
Being ISR-based timers, their executions are not blocked by bad-behaving functions / tasks, such as connecting to WiFi, Internet and Blynk services. You can also have many `(up to 16)` timers to use.
|
||||
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||||
This non-being-blocked important feature is absolutely necessary for mission-critical tasks.
|
||||
|
||||
You'll see blynkTimer Software is blocked while system is connecting to WiFi / Internet / Blynk, as well as by blocking task
|
||||
in loop(), using delay() function as an example. The elapsed time then is very unaccurate
|
||||
|
||||
#### Why using ISR-based Hardware Timer Interrupt is better
|
||||
|
||||
Imagine you have a system with a **mission-critical** function, measuring water level and control the sump pump or doing something much more important. You normally use a software timer to poll, or even place the function in loop(). But what if another function is **blocking** the loop() or setup().
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||||
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||||
So your function **might not be executed, and the result would be disastrous.**
|
||||
|
||||
You'd prefer to have your function called, no matter what happening with other functions (busy loop, bug, etc.).
|
||||
|
||||
The correct choice is to use a Hardware Timer with **Interrupt** to call your function.
|
||||
|
||||
These hardware timers, using interrupt, still work even if other functions are blocking. Moreover, they are much more **precise** (certainly depending on clock frequency accuracy) than other software timers using millis() or micros(). That's necessary if you need to measure some data requiring better accuracy.
|
||||
|
||||
Functions using normal software timers, relying on loop() and calling millis(), won't work if the loop() or setup() is blocked by certain operation. For example, certain function is blocking while it's connecting to WiFi or some services.
|
||||
|
||||
The catch is **your function is now part of an ISR (Interrupt Service Routine), and must be lean / mean, and follow certain rules.** More to read on:
|
||||
|
||||
[**HOWTO Attach Interrupt**](https://www.arduino.cc/reference/en/language/functions/external-interrupts/attachinterrupt/)
|
||||
|
||||
---
|
||||
|
||||
### Currently supported Boards
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||||
|
||||
1. ESP8266-based boards
|
||||
|
||||
---
|
||||
|
||||
### Important Notes about ISR
|
||||
|
||||
1. Inside the attached function, **delay() won’t work and the value returned by millis() will not increment.** Serial data received while in the function may be lost. You should declare as **volatile any variables that you modify within the attached function.**
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||||
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||||
2. Typically global variables are used to pass data between an ISR and the main program. To make sure variables shared between an ISR and the main program are updated correctly, declare them as volatile.
|
||||
|
||||
---
|
||||
---
|
||||
|
||||
|
||||
## Prerequisites
|
||||
|
||||
1. [`Arduino IDE 1.8.19+` for Arduino](https://github.com/arduino/Arduino). [](https://github.com/arduino/Arduino/releases/latest)
|
||||
2. [`ESP8266 Core 3.0.2+`](https://github.com/esp8266/Arduino) for ESP8266-based boards. [](https://github.com/esp8266/Arduino/releases/latest/). To use ESP8266 core 2.7.1+ for LittleFS.
|
||||
3. [`SimpleTimer library`](https://github.com/jfturcot/SimpleTimer) to use with some examples.
|
||||
|
||||
|
||||
---
|
||||
---
|
||||
|
||||
## Installation
|
||||
|
||||
### Use Arduino Library Manager
|
||||
|
||||
The best and easiest way is to use `Arduino Library Manager`. Search for [**ESP8266TimerInterrupt**](https://github.com/khoih-prog/ESP8266TimerInterrupt), then select / install the latest version.
|
||||
You can also use this link [](https://www.ardu-badge.com/ESP8266TimerInterrupt) for more detailed instructions.
|
||||
|
||||
### Manual Install
|
||||
|
||||
Another way to install is to:
|
||||
|
||||
1. Navigate to [**ESP8266TimerInterrupt**](https://github.com/khoih-prog/ESP8266TimerInterrupt) page.
|
||||
2. Download the latest release `ESP8266TimerInterrupt-master.zip`.
|
||||
3. Extract the zip file to `ESP8266TimerInterrupt-master` directory
|
||||
4. Copy whole `ESP8266TimerInterrupt-master` folder to Arduino libraries' directory such as `~/Arduino/libraries/`.
|
||||
|
||||
### VS Code & PlatformIO
|
||||
|
||||
1. Install [VS Code](https://code.visualstudio.com/)
|
||||
2. Install [PlatformIO](https://platformio.org/platformio-ide)
|
||||
3. Install [**ESP8266TimerInterrupt** library](https://registry.platformio.org/libraries/khoih-prog/ESP8266TimerInterrupt) by using [Library Manager](https://registry.platformio.org/libraries/khoih-prog/ESP8266TimerInterrupt/installation). Search for **ESP8266TimerInterrupt** in [Platform.io Author's Libraries](https://platformio.org/lib/search?query=author:%22Khoi%20Hoang%22)
|
||||
4. Use included [platformio.ini](platformio/platformio.ini) file from examples to ensure that all dependent libraries will installed automatically. Please visit documentation for the other options and examples at [Project Configuration File](https://docs.platformio.org/page/projectconf.html)
|
||||
|
||||
---
|
||||
---
|
||||
|
||||
### HOWTO Fix `Multiple Definitions` Linker Error
|
||||
|
||||
The current library implementation, using `xyz-Impl.h` instead of standard `xyz.cpp`, possibly creates certain `Multiple Definitions` Linker error in certain use cases.
|
||||
|
||||
You can use
|
||||
|
||||
```
|
||||
#include "ESP8266TimerInterrupt.h" //https://github.com/khoih-prog/ESP8266TimerInterrupt
|
||||
#include "ESP8266_ISR_Timer.hpp" //https://github.com/khoih-prog/ESP8266TimerInterrupt
|
||||
```
|
||||
|
||||
in many files. But be sure to use the following `#include <ESP8266_ISR_Timer.h>` **in just 1 `.h`, `.cpp` or `.ino` file**, which must **not be included in any other file**, to avoid `Multiple Definitions` Linker Error
|
||||
|
||||
```
|
||||
// To be included only in main(), .ino with setup() to avoid `Multiple Definitions` Linker Error
|
||||
#include "ESP8266_ISR_Timer.h" //https://github.com/khoih-prog/ESP8266TimerInterrupt
|
||||
```
|
||||
|
||||
Check the new [**multiFileProject** example](examples/multiFileProject) for a `HOWTO` demo.
|
||||
|
||||
Have a look at the discussion in [Different behaviour using the src_cpp or src_h lib #80](https://github.com/khoih-prog/ESPAsync_WiFiManager/discussions/80)
|
||||
|
||||
---
|
||||
---
|
||||
|
||||
### HOWTO Use PWM analogWrite() with ESP8266 running Timer1 Interrupt
|
||||
|
||||
Please have a look at [ESP8266TimerInterrupt Issue 8: **ESP8266Timer and PWM --> wdt reset**](https://github.com/khoih-prog/ESP8266TimerInterrupt/issues/8) to have more detailed description and solution of the issue.
|
||||
|
||||
#### 1. ESP8266 has only 2 hardware timers, named Timer0 and Timer1
|
||||
|
||||
#### 2. ESP8266 hardware timers' functions
|
||||
|
||||
- Timer0 has been used for WiFi and it's not advisable to use while using WiFi (if not using WiFi, why select ESP8266 ??)
|
||||
- Timer1 is used by this [**ESP8266TimerInterrupt Library**](https://github.com/khoih-prog/ESP8266TimerInterrupt)
|
||||
|
||||
#### 3. How to use PWM analogWrite() functions while using this library
|
||||
|
||||
1. If possible, use software timer instead of [**ESP8266TimerInterrupt Hardware Timer1**](https://github.com/khoih-prog/ESP8266TimerInterrupt)
|
||||
2. If using [**ESP8266TimerInterrupt Hardware Timer1**](https://github.com/khoih-prog/ESP8266TimerInterrupt) is a must, you can either
|
||||
- use external DAC such as AD5662, AD5667, AD5696.
|
||||
- use software PWM such as mentioned in [ESP8266 PWM REVISITED (AND REIMPLEMENTED)](https://lurchi.wordpress.com/2016/06/29/esp8266-pwm-revisited-and-reimplemented/)
|
||||
|
||||
|
||||
---
|
||||
---
|
||||
|
||||
## More useful Information
|
||||
|
||||
The ESP8266 timers are **badly designed**, using only 23-bit counter along with maximum 256 prescaler. They're only better than UNO / Mega.
|
||||
The ESP8266 has two hardware timers, but timer0 has been used for WiFi and it's not advisable to use. Only timer1 is available.
|
||||
The timer1's 23-bit counter terribly can count only up to 8,388,607. So the timer1 maximum interval is very short.
|
||||
Using 256 prescaler, maximum timer1 interval is only **26.843542 seconds !!!**
|
||||
|
||||
The timer1 counters can be configured to support automatic reload.
|
||||
|
||||
---
|
||||
|
||||
Now with these new **`16 ISR-based timers`**, the maximum interval is **practically unlimited** (limited only by unsigned long miliseconds).
|
||||
|
||||
The accuracy is nearly perfect compared to software timers. The most important feature is they're ISR-based timers. Therefore, their executions are not blocked by bad-behaving functions / tasks.
|
||||
|
||||
This important feature is absolutely necessary for mission-critical tasks.
|
||||
|
||||
The [ISR_Timer_Complex example](examples/ISR_Timer_Complex) will demonstrate the nearly perfect accuracy compared to software timers by printing the actual elapsed millisecs of each type of timers.
|
||||
|
||||
Being ISR-based timers, their executions are not blocked by bad-behaving functions / tasks, such as connecting to WiFi, Internet and Blynk services. You can also have many `(up to 16)` timers to use. This non-being-blocked important feature is absolutely necessary for mission-critical tasks.
|
||||
|
||||
You'll see blynkTimer Software is blocked while system is connecting to WiFi / Internet / Blynk, as well as by blocking task in loop(), using delay() function as an example. The elapsed time then is very unaccurate
|
||||
|
||||
---
|
||||
---
|
||||
|
||||
## Usage
|
||||
|
||||
The ESP8266 timers are badly designed, using only 23-bit counter along with maximum 256 prescaler. They're only better than UNO / Mega.
|
||||
|
||||
The ESP8266 has two hardware timers, but Timer0 has been used for WiFi and it's not advisable to use. Only Timer1 is available.
|
||||
|
||||
The Timer1's 23-bit counter can terribly count only up to 8,388,607. So the timer1 maximum interval is very short.
|
||||
Using 256 prescaler, maximum Timer1 interval is only 26.843542 seconds !!!
|
||||
|
||||
### 1. Using only Hardware Timer directly
|
||||
|
||||
### 1.1 Init Hardware Timer
|
||||
|
||||
```
|
||||
// Select a Timer Clock
|
||||
#define USING_TIM_DIV1 false // for shortest and most accurate timer
|
||||
#define USING_TIM_DIV16 false // for medium time and medium accurate timer
|
||||
#define USING_TIM_DIV256 true // for longest timer but least accurate. Default
|
||||
|
||||
// Init ESP8266 only and only Timer 1
|
||||
ESP8266Timer ITimer;
|
||||
```
|
||||
|
||||
### 1.2 Set Hardware Timer Interval and attach Timer Interrupt Handler function
|
||||
|
||||
Use one of these functions with **interval in unsigned long milliseconds**
|
||||
|
||||
```
|
||||
// interval (in microseconds)
|
||||
bool setInterval(unsigned long interval, timer_callback callback)
|
||||
|
||||
// interval (in microseconds)
|
||||
bool attachInterruptInterval(unsigned long interval, timer_callback callback)
|
||||
```
|
||||
|
||||
as follows
|
||||
|
||||
```
|
||||
void IRAM_ATTR TimerHandler()
|
||||
{
|
||||
// Doing something here inside ISR
|
||||
}
|
||||
|
||||
#define TIMER_INTERVAL_MS 1000
|
||||
|
||||
void setup()
|
||||
{
|
||||
....
|
||||
|
||||
// Interval in microsecs
|
||||
if (ITimer.attachInterruptInterval(TIMER_INTERVAL_MS * 1000, TimerHandler))
|
||||
{
|
||||
lastMillis = millis();
|
||||
Serial.print(F("Starting ITimer OK, millis() = ")); Serial.println(lastMillis);
|
||||
}
|
||||
else
|
||||
Serial.println(F("Can't set ITimer correctly. Select another freq. or interval"));
|
||||
}
|
||||
```
|
||||
|
||||
### 1.3 Set Hardware Timer Frequency and attach Timer Interrupt Handler function
|
||||
|
||||
Use one of these functions with **frequency in float Hz**
|
||||
|
||||
```
|
||||
// frequency (in hertz)
|
||||
bool setFrequency(float frequency, timer_callback callback)
|
||||
|
||||
// frequency (in hertz)
|
||||
bool attachInterrupt(float frequency, timer_callback callback)
|
||||
```
|
||||
|
||||
as follows
|
||||
|
||||
```
|
||||
void TimerHandler()
|
||||
{
|
||||
// Doing something here inside ISR
|
||||
}
|
||||
|
||||
#define TIMER_FREQ_HZ 5555.555
|
||||
|
||||
void setup()
|
||||
{
|
||||
....
|
||||
|
||||
// Frequency in float Hz
|
||||
if (ITimer.attachInterrupt(TIMER_FREQ_HZ, TimerHandler))
|
||||
Serial.println("Starting ITimer OK, millis() = " + String(millis()));
|
||||
else
|
||||
Serial.println("Can't set ITimer. Select another freq. or timer");
|
||||
}
|
||||
```
|
||||
|
||||
|
||||
### 2. Using 16 ISR_based Timers from 1 Hardware Timer
|
||||
|
||||
### 2.1 Important Note
|
||||
|
||||
The 16 ISR_based Timers, designed for long timer intervals, only support using **unsigned long millisec intervals**. If you have to use much higher frequency or sub-millisecond interval, you have to use the Hardware Timers directly as in [1.3 Set Hardware Timer Frequency and attach Timer Interrupt Handler function](#13-set-hardware-timer-frequency-and-attach-timer-interrupt-handler-function)
|
||||
|
||||
### 2.2 Init Hardware Timer and ISR-based Timer
|
||||
|
||||
```
|
||||
// Select a Timer Clock
|
||||
#define USING_TIM_DIV1 false // for shortest and most accurate timer
|
||||
#define USING_TIM_DIV16 false // for medium time and medium accurate timer
|
||||
#define USING_TIM_DIV256 true // for longest timer but least accurate. Default
|
||||
|
||||
#include "ESP8266TimerInterrupt.h"
|
||||
#include "ESP8266_ISR_Timer.h"
|
||||
|
||||
// Init ESP8266 timer 1
|
||||
ESP8266Timer ITimer;
|
||||
|
||||
// Init ESP8266_ISR_Timer
|
||||
ESP8266_ISR_Timer ISR_Timer;
|
||||
```
|
||||
|
||||
### 2.3 Set Hardware Timer Interval and attach Timer Interrupt Handler functions
|
||||
|
||||
```
|
||||
void IRAM_ATTR TimerHandler()
|
||||
{
|
||||
ISR_timer.run();
|
||||
}
|
||||
|
||||
#define HW_TIMER_INTERVAL_MS 50L
|
||||
|
||||
#define TIMER_INTERVAL_2S 2000L
|
||||
#define TIMER_INTERVAL_5S 5000L
|
||||
#define TIMER_INTERVAL_11S 11000L
|
||||
#define TIMER_INTERVAL_101S 101000L
|
||||
|
||||
// In AVR, avoid doing something fancy in ISR, for example complex Serial.print with String() argument
|
||||
// The pure simple Serial.prints here are just for demonstration and testing. Must be eliminate in working environment
|
||||
// Or you can get this run-time error / crash
|
||||
void doingSomething2s()
|
||||
{
|
||||
// Doing something here inside ISR every 2 seconds
|
||||
}
|
||||
|
||||
void doingSomething5s()
|
||||
{
|
||||
// Doing something here inside ISR every 5 seconds
|
||||
}
|
||||
|
||||
void doingSomething11s()
|
||||
{
|
||||
// Doing something here inside ISR every 11 seconds
|
||||
}
|
||||
|
||||
void doingSomething101s()
|
||||
{
|
||||
// Doing something here inside ISR every 101 seconds
|
||||
}
|
||||
|
||||
void setup()
|
||||
{
|
||||
....
|
||||
|
||||
// Interval in microsecs
|
||||
if (ITimer.attachInterruptInterval(HW_TIMER_INTERVAL_MS * 1000, TimerHandler))
|
||||
{
|
||||
startMillis = millis();
|
||||
Serial.print(F("Starting ITimer OK, millis() = ")); Serial.println(startMillis);
|
||||
}
|
||||
else
|
||||
Serial.println(F("Can't set ITimer. Select another freq. or timer"));
|
||||
|
||||
// Just to demonstrate, don't use too many ISR Timers if not absolutely necessary
|
||||
// You can use up to 16 timer for each ISR_Timer
|
||||
ISR_timer.setInterval(TIMER_INTERVAL_2S, doingSomething2s);
|
||||
ISR_timer.setInterval(TIMER_INTERVAL_5S, doingSomething5s);
|
||||
ISR_timer.setInterval(TIMER_INTERVAL_11S, doingSomething11s);
|
||||
ISR_timer.setInterval(TIMER_INTERVAL_101S, doingSomething101s);
|
||||
}
|
||||
```
|
||||
|
||||
### 2.4 Set One-Shot Hardware Timer Interval
|
||||
|
||||
https://github.com/khoih-prog/ESP8266TimerInterrupt/blob/f497e733eda4a749067e037747c73d8c188a59d9/examples/ISR_16_Timers_Array_OneShot/ISR_16_Timers_Array_OneShot.ino#L414-L421
|
||||
|
||||
|
||||
---
|
||||
---
|
||||
|
||||
|
||||
### Examples:
|
||||
|
||||
1. [Argument_None](examples/Argument_None)
|
||||
2. [ISR_RPM_Measure](examples/ISR_RPM_Measure)
|
||||
3. [RPM_Measure](examples/RPM_Measure)
|
||||
4. [SwitchDebounce](examples/SwitchDebounce)
|
||||
5. [TimerInterruptTest](examples/TimerInterruptTest)
|
||||
6. [Change_Interval](examples/Change_Interval).
|
||||
7. [**ISR_16_Timers_Array**](examples/ISR_16_Timers_Array)
|
||||
8. [**ISR_16_Timers_Array_Complex**](examples/ISR_16_Timers_Array_Complex)
|
||||
9. [**ISR_16_Timers_Array_OneShot**](examples/ISR_16_Timers_Array_OneShot) **New**
|
||||
10. [**multiFileProject**](examples/multiFileProject) **New**
|
||||
|
||||
---
|
||||
---
|
||||
|
||||
### Example [Change_Interval](examples/Change_Interval)
|
||||
|
||||
https://github.com/khoih-prog/ESP8266TimerInterrupt/blob/f497e733eda4a749067e037747c73d8c188a59d9/examples/Change_Interval/Change_Interval.ino#L32-L130
|
||||
|
||||
|
||||
---
|
||||
---
|
||||
|
||||
### Debug Terminal Output Samples
|
||||
|
||||
### 1. TimerInterruptTest on ESP8266_NODEMCU_ESP12E
|
||||
|
||||
The following is the sample terminal output when running example [TimerInterruptTest](examples/TimerInterruptTest) on **ESP8266_NODEMCU_ESP12E** to demonstrate the accuracy of Hardware Timers.
|
||||
|
||||
```
|
||||
Starting TimerInterruptTest on ESP8266_NODEMCU_ESP12E
|
||||
ESP8266TimerInterrupt v1.6.0
|
||||
CPU Frequency = 160 MHz
|
||||
ESP8266TimerInterrupt: _fre = 312500.00, _count = 312500
|
||||
Starting ITimer OK, millis() = 262
|
||||
Delta ms = 1000
|
||||
Delta ms = 1000
|
||||
Delta ms = 1000
|
||||
Delta ms = 1000
|
||||
Delta ms = 1000
|
||||
Delta ms = 1000
|
||||
Delta ms = 1000
|
||||
Delta ms = 1000
|
||||
Delta ms = 1000
|
||||
Delta ms = 1000
|
||||
Delta ms = 1000
|
||||
Delta ms = 1000
|
||||
Delta ms = 1000
|
||||
Delta ms = 1000
|
||||
Delta ms = 1000
|
||||
Delta ms = 1000
|
||||
Delta ms = 1000
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
### 2. Change_Interval on ESP8266_NODEMCU_ESP12E
|
||||
|
||||
The following is the sample terminal output when running example [Change_Interval](examples/Change_Interval) on **ESP8266_NODEMCU_ESP12E** to demonstrate how to change Timer Interval on-the-fly
|
||||
|
||||
```
|
||||
Starting Change_Interval on ESP8266_NODEMCU_ESP12E
|
||||
ESP8266TimerInterrupt v1.6.0
|
||||
CPU Frequency = 160 MHz
|
||||
Starting ITimer OK, millis() = 162
|
||||
Time = 10001, TimerCount = 19
|
||||
Time = 20002, TimerCount = 39
|
||||
Changing Interval, Timer = 1000
|
||||
Time = 30003, TimerCount = 49
|
||||
Time = 40004, TimerCount = 59
|
||||
Changing Interval, Timer = 500
|
||||
Time = 50005, TimerCount = 79
|
||||
Time = 60006, TimerCount = 99
|
||||
Changing Interval, Timer = 1000
|
||||
Time = 70007, TimerCount = 109
|
||||
Time = 80008, TimerCount = 119
|
||||
Changing Interval, Timer = 500
|
||||
Time = 90009, TimerCount = 139
|
||||
Time = 100010, TimerCount = 159
|
||||
Changing Interval, Timer = 1000
|
||||
Time = 110011, TimerCount = 169
|
||||
Time = 120012, TimerCount = 179
|
||||
Changing Interval, Timer = 500
|
||||
Time = 130013, TimerCount = 199
|
||||
Time = 140014, TimerCount = 219
|
||||
Changing Interval, Timer = 1000
|
||||
Time = 150015, TimerCount = 229
|
||||
Time = 160016, TimerCount = 239
|
||||
Changing Interval, Timer = 500
|
||||
Time = 170017, TimerCount = 259
|
||||
Time = 180018, TimerCount = 279
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
### 3. ISR_16_Timers_Array on ESP8266_NODEMCU_ESP12E
|
||||
|
||||
The following is the sample terminal output when running example [ISR_16_Timers_Array](examples/ISR_16_Timers_Array) on **ESP8266_NODEMCU_ESP12E** to demonstrate of ISR Hardware Timer, especially when system is very busy or blocked. The 16 independent ISR timers are programmed to be activated repetitively after certain intervals, is activated exactly after that programmed interval !!!
|
||||
|
||||
```
|
||||
Starting ISR_16_Timers_Array on ESP8266_NODEMCU_ESP12E
|
||||
ESP8266TimerInterrupt v1.6.0
|
||||
CPU Frequency = 160 MHz
|
||||
Starting ITimer OK, millis() = 175
|
||||
1s: Delta ms = 1003, ms = 1178
|
||||
1s: Delta ms = 999, ms = 2177
|
||||
2s: Delta ms = 2002, ms = 2177
|
||||
1s: Delta ms = 1000, ms = 3177
|
||||
3s: Delta ms = 3002, ms = 3177
|
||||
1s: Delta ms = 1000, ms = 4177
|
||||
2s: Delta ms = 2000, ms = 4177
|
||||
4s: Delta ms = 4002, ms = 4177
|
||||
1s: Delta ms = 1000, ms = 5177
|
||||
5s: Delta ms = 5002, ms = 5177
|
||||
1s: Delta ms = 1000, ms = 6177
|
||||
2s: Delta ms = 2001, ms = 6178
|
||||
3s: Delta ms = 3001, ms = 6178
|
||||
6s: Delta ms = 6003, ms = 6178
|
||||
1s: Delta ms = 1000, ms = 7177
|
||||
7s: Delta ms = 7002, ms = 7177
|
||||
1s: Delta ms = 1000, ms = 8177
|
||||
2s: Delta ms = 1999, ms = 8177
|
||||
4s: Delta ms = 4000, ms = 8177
|
||||
8s: Delta ms = 8002, ms = 8177
|
||||
1s: Delta ms = 1000, ms = 9177
|
||||
3s: Delta ms = 2999, ms = 9177
|
||||
9s: Delta ms = 9002, ms = 9177
|
||||
simpleTimerDoingSomething2s: Delta programmed ms = 2000, actual = 10002
|
||||
1s: Delta ms = 1000, ms = 10177
|
||||
2s: Delta ms = 2000, ms = 10177
|
||||
5s: Delta ms = 5001, ms = 10178
|
||||
10s: Delta ms = 10006, ms = 10181
|
||||
1s: Delta ms = 1000, ms = 11177
|
||||
11s: Delta ms = 11003, ms = 11178
|
||||
1s: Delta ms = 1000, ms = 12177
|
||||
2s: Delta ms = 2000, ms = 12177
|
||||
3s: Delta ms = 3000, ms = 12177
|
||||
4s: Delta ms = 4000, ms = 12177
|
||||
6s: Delta ms = 5999, ms = 12177
|
||||
12s: Delta ms = 12005, ms = 12180
|
||||
1s: Delta ms = 1000, ms = 13177
|
||||
13s: Delta ms = 13002, ms = 13177
|
||||
1s: Delta ms = 1000, ms = 14177
|
||||
2s: Delta ms = 2000, ms = 14177
|
||||
7s: Delta ms = 7000, ms = 14177
|
||||
14s: Delta ms = 14002, ms = 14177
|
||||
1s: Delta ms = 1000, ms = 15177
|
||||
3s: Delta ms = 3000, ms = 15177
|
||||
5s: Delta ms = 4999, ms = 15177
|
||||
15s: Delta ms = 15002, ms = 15177
|
||||
1s: Delta ms = 1000, ms = 16177
|
||||
2s: Delta ms = 2000, ms = 16177
|
||||
4s: Delta ms = 4001, ms = 16178
|
||||
8s: Delta ms = 8001, ms = 16178
|
||||
16s: Delta ms = 16003, ms = 16178
|
||||
1s: Delta ms = 1000, ms = 17177
|
||||
1s: Delta ms = 1000, ms = 18177
|
||||
2s: Delta ms = 2000, ms = 18177
|
||||
3s: Delta ms = 3000, ms = 18177
|
||||
6s: Delta ms = 6000, ms = 18177
|
||||
9s: Delta ms = 9001, ms = 18178
|
||||
1s: Delta ms = 1000, ms = 19177
|
||||
simpleTimerDoingSomething2s: Delta programmed ms = 2000, actual = 10000
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
### 4. ISR_16_Timers_Array_Complex on ESP8266_NODEMCU_ESP12E
|
||||
|
||||
The following is the sample terminal output when running example [ISR_16_Timers_Array_Complex](examples/ISR_16_Timers_Array_Complex) on **ESP8266_NODEMCU_ESP12E** to demonstrate the ISR Hardware Timer, especially when system is very busy or blocked. The 16 independent ISR timers are programmed to be activated repetitively after certain intervals, is activated exactly after that programmed interval !!!
|
||||
|
||||
|
||||
```
|
||||
Starting ISR_16_Timers_Array_Complex on ESP8266_NODEMCU_ESP12E
|
||||
ESP8266TimerInterrupt v1.6.0
|
||||
CPU Frequency = 160 MHz
|
||||
Starting ITimer OK, millis() = 177
|
||||
SimpleTimer : 2, ms : 10179, Dms : 10000
|
||||
Timer : 0, programmed : 5000, actual : 5008
|
||||
Timer : 1, programmed : 10000, actual : 0
|
||||
Timer : 2, programmed : 15000, actual : 0
|
||||
Timer : 3, programmed : 20000, actual : 0
|
||||
Timer : 4, programmed : 25000, actual : 0
|
||||
Timer : 5, programmed : 30000, actual : 0
|
||||
Timer : 6, programmed : 35000, actual : 0
|
||||
Timer : 7, programmed : 40000, actual : 0
|
||||
Timer : 8, programmed : 45000, actual : 0
|
||||
Timer : 9, programmed : 50000, actual : 0
|
||||
Timer : 10, programmed : 55000, actual : 0
|
||||
Timer : 11, programmed : 60000, actual : 0
|
||||
Timer : 12, programmed : 65000, actual : 0
|
||||
Timer : 13, programmed : 70000, actual : 0
|
||||
Timer : 14, programmed : 75000, actual : 0
|
||||
Timer : 15, programmed : 80000, actual : 0
|
||||
SimpleTimer : 2, ms : 20232, Dms : 10053
|
||||
Timer : 0, programmed : 5000, actual : 5000
|
||||
Timer : 1, programmed : 10000, actual : 10000
|
||||
Timer : 2, programmed : 15000, actual : 15008
|
||||
Timer : 3, programmed : 20000, actual : 20008
|
||||
Timer : 4, programmed : 25000, actual : 0
|
||||
Timer : 5, programmed : 30000, actual : 0
|
||||
Timer : 6, programmed : 35000, actual : 0
|
||||
Timer : 7, programmed : 40000, actual : 0
|
||||
Timer : 8, programmed : 45000, actual : 0
|
||||
Timer : 9, programmed : 50000, actual : 0
|
||||
Timer : 10, programmed : 55000, actual : 0
|
||||
Timer : 11, programmed : 60000, actual : 0
|
||||
Timer : 12, programmed : 65000, actual : 0
|
||||
Timer : 13, programmed : 70000, actual : 0
|
||||
Timer : 14, programmed : 75000, actual : 0
|
||||
Timer : 15, programmed : 80000, actual : 0
|
||||
SimpleTimer : 2, ms : 30286, Dms : 10054
|
||||
Timer : 0, programmed : 5000, actual : 5000
|
||||
Timer : 1, programmed : 10000, actual : 10000
|
||||
Timer : 2, programmed : 15000, actual : 15000
|
||||
Timer : 3, programmed : 20000, actual : 20008
|
||||
Timer : 4, programmed : 25000, actual : 25008
|
||||
Timer : 5, programmed : 30000, actual : 30008
|
||||
Timer : 6, programmed : 35000, actual : 0
|
||||
Timer : 7, programmed : 40000, actual : 0
|
||||
Timer : 8, programmed : 45000, actual : 0
|
||||
Timer : 9, programmed : 50000, actual : 0
|
||||
Timer : 10, programmed : 55000, actual : 0
|
||||
Timer : 11, programmed : 60000, actual : 0
|
||||
Timer : 12, programmed : 65000, actual : 0
|
||||
Timer : 13, programmed : 70000, actual : 0
|
||||
Timer : 14, programmed : 75000, actual : 0
|
||||
Timer : 15, programmed : 80000, actual : 0
|
||||
SimpleTimer : 2, ms : 40341, Dms : 10055
|
||||
Timer : 0, programmed : 5000, actual : 5000
|
||||
Timer : 1, programmed : 10000, actual : 10000
|
||||
Timer : 2, programmed : 15000, actual : 15000
|
||||
Timer : 3, programmed : 20000, actual : 20000
|
||||
Timer : 4, programmed : 25000, actual : 25008
|
||||
Timer : 5, programmed : 30000, actual : 30008
|
||||
Timer : 6, programmed : 35000, actual : 35008
|
||||
Timer : 7, programmed : 40000, actual : 40008
|
||||
Timer : 8, programmed : 45000, actual : 0
|
||||
Timer : 9, programmed : 50000, actual : 0
|
||||
Timer : 10, programmed : 55000, actual : 0
|
||||
Timer : 11, programmed : 60000, actual : 0
|
||||
Timer : 12, programmed : 65000, actual : 0
|
||||
Timer : 13, programmed : 70000, actual : 0
|
||||
Timer : 14, programmed : 75000, actual : 0
|
||||
Timer : 15, programmed : 80000, actual : 0
|
||||
SimpleTimer : 2, ms : 50396, Dms : 10055
|
||||
Timer : 0, programmed : 5000, actual : 5000
|
||||
Timer : 1, programmed : 10000, actual : 10000
|
||||
Timer : 2, programmed : 15000, actual : 15000
|
||||
Timer : 3, programmed : 20000, actual : 20000
|
||||
Timer : 4, programmed : 25000, actual : 25000
|
||||
Timer : 5, programmed : 30000, actual : 30008
|
||||
Timer : 6, programmed : 35000, actual : 35008
|
||||
Timer : 7, programmed : 40000, actual : 40008
|
||||
Timer : 8, programmed : 45000, actual : 45008
|
||||
Timer : 9, programmed : 50000, actual : 50008
|
||||
Timer : 10, programmed : 55000, actual : 0
|
||||
Timer : 11, programmed : 60000, actual : 0
|
||||
Timer : 12, programmed : 65000, actual : 0
|
||||
Timer : 13, programmed : 70000, actual : 0
|
||||
Timer : 14, programmed : 75000, actual : 0
|
||||
Timer : 15, programmed : 80000, actual : 0
|
||||
SimpleTimer : 2, ms : 60452, Dms : 10056
|
||||
Timer : 0, programmed : 5000, actual : 5000
|
||||
Timer : 1, programmed : 10000, actual : 10000
|
||||
Timer : 2, programmed : 15000, actual : 15000
|
||||
Timer : 3, programmed : 20000, actual : 20000
|
||||
Timer : 4, programmed : 25000, actual : 25000
|
||||
Timer : 5, programmed : 30000, actual : 30000
|
||||
Timer : 6, programmed : 35000, actual : 35008
|
||||
Timer : 7, programmed : 40000, actual : 40008
|
||||
Timer : 8, programmed : 45000, actual : 45008
|
||||
Timer : 9, programmed : 50000, actual : 50008
|
||||
Timer : 10, programmed : 55000, actual : 55008
|
||||
Timer : 11, programmed : 60000, actual : 60008
|
||||
Timer : 12, programmed : 65000, actual : 0
|
||||
Timer : 13, programmed : 70000, actual : 0
|
||||
Timer : 14, programmed : 75000, actual : 0
|
||||
Timer : 15, programmed : 80000, actual : 0
|
||||
SimpleTimer : 2, ms : 70509, Dms : 10057
|
||||
Timer : 0, programmed : 5000, actual : 5000
|
||||
Timer : 1, programmed : 10000, actual : 10000
|
||||
Timer : 2, programmed : 15000, actual : 15000
|
||||
Timer : 3, programmed : 20000, actual : 20000
|
||||
Timer : 4, programmed : 25000, actual : 25000
|
||||
Timer : 5, programmed : 30000, actual : 30000
|
||||
Timer : 6, programmed : 35000, actual : 35000
|
||||
Timer : 7, programmed : 40000, actual : 40008
|
||||
Timer : 8, programmed : 45000, actual : 45008
|
||||
Timer : 9, programmed : 50000, actual : 50008
|
||||
Timer : 10, programmed : 55000, actual : 55008
|
||||
Timer : 11, programmed : 60000, actual : 60008
|
||||
Timer : 12, programmed : 65000, actual : 65008
|
||||
Timer : 13, programmed : 70000, actual : 70008
|
||||
Timer : 14, programmed : 75000, actual : 0
|
||||
Timer : 15, programmed : 80000, actual : 0
|
||||
SimpleTimer : 2, ms : 80566, Dms : 10057
|
||||
Timer : 0, programmed : 5000, actual : 5000
|
||||
Timer : 1, programmed : 10000, actual : 10000
|
||||
Timer : 2, programmed : 15000, actual : 15000
|
||||
Timer : 3, programmed : 20000, actual : 20000
|
||||
Timer : 4, programmed : 25000, actual : 25000
|
||||
Timer : 5, programmed : 30000, actual : 30000
|
||||
Timer : 6, programmed : 35000, actual : 35000
|
||||
Timer : 7, programmed : 40000, actual : 40000
|
||||
Timer : 8, programmed : 45000, actual : 45008
|
||||
Timer : 9, programmed : 50000, actual : 50008
|
||||
Timer : 10, programmed : 55000, actual : 55008
|
||||
Timer : 11, programmed : 60000, actual : 60008
|
||||
Timer : 12, programmed : 65000, actual : 65008
|
||||
Timer : 13, programmed : 70000, actual : 70008
|
||||
Timer : 14, programmed : 75000, actual : 75008
|
||||
Timer : 15, programmed : 80000, actual : 80008
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
### 5. ISR_16_Timers_Array_OneShot on ESP8266_NODEMCU_ESP12E
|
||||
|
||||
The following is the sample terminal output when running example [ISR_16_Timers_Array_OneShot](examples/ISR_16_Timers_Array_OneShot) on **ESP8266_NODEMCU_ESP12E** to demonstrate the **One-Shot** ISR Hardware Timer, especially when system is very busy or blocked. The 16 independent ISR timers are programmed to be activated repetitively after certain intervals, is activated exactly after that programmed interval !!!
|
||||
|
||||
|
||||
```
|
||||
Starting ISR_16_Timers_Array_OneShot on ESP8266_NODEMCU_ESP12E
|
||||
ESP8266TimerInterrupt v1.6.0
|
||||
CPU Frequency = 160 MHz
|
||||
Starting ITimer OK, millis() = 365
|
||||
1s: Delta ms = 1002, ms = 1367
|
||||
2s: Delta ms = 2002, ms = 2367
|
||||
3s: Delta ms = 3002, ms = 3367
|
||||
4s: Delta ms = 4002, ms = 4367
|
||||
5s: Delta ms = 5002, ms = 5367
|
||||
6s: Delta ms = 6002, ms = 6367
|
||||
7s: Delta ms = 7002, ms = 7367
|
||||
8s: Delta ms = 8002, ms = 8367
|
||||
9s: Delta ms = 9002, ms = 9367
|
||||
10s: Delta ms = 10002, ms = 10367
|
||||
simpleTimerDoingSomething2s: Delta programmed ms = 2000, actual = 10002
|
||||
11s: Delta ms = 11002, ms = 11367
|
||||
12s: Delta ms = 12002, ms = 12367
|
||||
13s: Delta ms = 13002, ms = 13367
|
||||
14s: Delta ms = 14002, ms = 14367
|
||||
15s: Delta ms = 15002, ms = 15367
|
||||
16s: Delta ms = 16002, ms = 16367
|
||||
simpleTimerDoingSomething2s: Delta programmed ms = 2000, actual = 10000
|
||||
simpleTimerDoingSomething2s: Delta programmed ms = 2000, actual = 10000
|
||||
simpleTimerDoingSomething2s: Delta programmed ms = 2000, actual = 10001
|
||||
simpleTimerDoingSomething2s: Delta programmed ms = 2000, actual = 10000
|
||||
simpleTimerDoingSomething2s: Delta programmed ms = 2000, actual = 10000
|
||||
simpleTimerDoingSomething2s: Delta programmed ms = 2000, actual = 10000
|
||||
simpleTimerDoingSomething2s: Delta programmed ms = 2000, actual = 10000
|
||||
```
|
||||
|
||||
---
|
||||
---
|
||||
|
||||
### Debug
|
||||
|
||||
Debug is enabled by default on Serial.
|
||||
|
||||
You can also change the debugging level (_TIMERINTERRUPT_LOGLEVEL_) from 0 to 4
|
||||
|
||||
```cpp
|
||||
// These define's must be placed at the beginning before #include "ESP8266TimerInterrupt.h"
|
||||
// _TIMERINTERRUPT_LOGLEVEL_ from 0 to 4
|
||||
// Don't define _TIMERINTERRUPT_LOGLEVEL_ > 0. Only for special ISR debugging only. Can hang the system.
|
||||
#define TIMER_INTERRUPT_DEBUG 0
|
||||
#define _TIMERINTERRUPT_LOGLEVEL_ 0
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
### Troubleshooting
|
||||
|
||||
If you get compilation errors, more often than not, you may need to install a newer version of the core for Arduino boards.
|
||||
|
||||
Sometimes, the library will only work if you update the board core to the latest version because I am using newly added functions.
|
||||
|
||||
---
|
||||
---
|
||||
|
||||
|
||||
### Issues
|
||||
|
||||
Submit issues to: [ESP8266TimerInterrupt issues](https://github.com/khoih-prog/ESP8266TimerInterrupt/issues)
|
||||
|
||||
---
|
||||
---
|
||||
|
||||
## TO DO
|
||||
|
||||
1. Search for bug and improvement.
|
||||
|
||||
---
|
||||
|
||||
## DONE
|
||||
|
||||
1. Basic hardware timers for ESP8266.
|
||||
2. More hardware-initiated software-enabled timers
|
||||
3. Longer time interval
|
||||
4. Similar features for remaining Arduino boards such as AVR, Teensy, SAMD21, SAMD51, SAM-DUE, nRF52, ESP32, STM32, etc.
|
||||
5. Update to match new ESP8266 core v3.0.0
|
||||
6. Fix compiler errors due to conflict to some libraries.
|
||||
7. Add complex examples.
|
||||
8. Update to match new ESP8266 core v3.0.2
|
||||
9. Fix `multiple-definitions` linker error. Drop `src_cpp` and `src_h` directories
|
||||
10. Add feature to select among highest, medium or lowest accuracy for Timers for shortest, medium or longest time
|
||||
11. Convert to `h-only` style.
|
||||
12. Optimize code by using passing by `reference` instead of by `value`
|
||||
13. Add example [multiFileProject](examples/multiFileProject) to demo for multiple-file project
|
||||
14. Add example [ISR_16_Timers_Array_OneShot](examples/ISR_16_Timers_Array_OneShot) to demo how to use `one-shot ISR-based timer`
|
||||
|
||||
---
|
||||
---
|
||||
|
||||
## Contributions and thanks
|
||||
|
||||
1. Thanks to [Holger Lembke](https://github.com/holgerlembke) to report [ESP8266TimerInterrupt Issue 8: **ESP8266Timer and PWM --> wdt reset**](https://github.com/khoih-prog/ESP8266TimerInterrupt/issues/8), leading to the [HOWTO Use PWM analogWrite() with ESP8266 running Timer1 Interrupt](https://github.com/khoih-prog/ESP8266TimerInterrupt#howto-use-pwm-analogwrite-with-esp8266-running-timer1-interrupt) notes.
|
||||
2. Thanks to [Eugene](https://github.com/RushOnline) to make bug-fixing PR and discussion in [bugfix: reattachInterrupt() pass wrong frequency value to setFrequency() #19](https://github.com/khoih-prog/ESP8266TimerInterrupt/pull/19), leading to v1.5.0
|
||||
3. Thanks to [absalom-muc](https://github.com/absalom-muc) to make enhancement request in [One shot operating mode #20](https://github.com/khoih-prog/ESP8266TimerInterrupt/issues/20), leading to v1.6.0 to add example to demo how to use `one-shot ISR-based timer`
|
||||
|
||||
<table>
|
||||
<tr>
|
||||
<td align="center"><a href="https://github.com/holgerlembke"><img src="https://github.com/holgerlembke.png" width="100px;" alt="holgerlembke"/><br /><sub><b>Holger Lembke</b></sub></a><br /></td>
|
||||
<td align="center"><a href="https://github.com/RushOnline"><img src="https://github.com/RushOnline.png" width="100px;" alt="RushOnline"/><br /><sub><b>Eugene</b></sub></a><br /></td>
|
||||
<td align="center"><a href="https://github.com/absalom-muc"><img src="https://github.com/absalom-muc.png" width="100px;" alt="absalom-muc"/><br /><sub><b>absalom-muc</b></sub></a><br /></td>
|
||||
</tr>
|
||||
</table>
|
||||
|
||||
|
||||
---
|
||||
|
||||
## Contributing
|
||||
|
||||
If you want to contribute to this project:
|
||||
- Report bugs and errors
|
||||
- Ask for enhancements
|
||||
- Create issues and pull requests
|
||||
- Tell other people about this library
|
||||
|
||||
---
|
||||
|
||||
## License
|
||||
|
||||
- The library is licensed under [MIT](https://github.com/khoih-prog/ESP8266TimerInterrupt/blob/master/LICENSE)
|
||||
|
||||
---
|
||||
|
||||
## Copyright
|
||||
|
||||
Copyright 2019- Khoi Hoang
|
||||
|
||||
|
||||
Reference in New Issue
Block a user