This library enables you to use Interrupt from Hardware Timers on supported Arduino boards such as AVR, ESP8266, ESP32, SAMD, SAM DUE, nRF52, Teensy, etc.
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).
Notes for Teensy boards
You'd certainly experienced that if using other Hardware Timer Libraries, such as TimerOne or TimerThree, the interval is short, in milliseconds range.
For example, Teensy 4.x, with super-high clock frequency of 600MHz and Timer1 and Timer3 clock of 150MHz, the maximum interval / frequency is only 55922.3467 us / 17.881939 Hz. This TimerInterrupt_Generic library will provide you up to 16 super-long (ulong millisecs) ISR Timers for each used Timer1 or Timer3.
For Teensy 4.x, this library will be expanded to use other available hardware timers, such as FTM, GPT, QUAD, PIT, in addition to current Timer1 and Timer3.
Why do we need this Hardware Timer Interrupt?
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().
So your function might not be executed on-time or not at all, 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.
Releases v1.1.0
Initial Super-Library coding to merge all TimerInterrupt Libraries
cmaglie
commented
4 years ago
Please add TimerInterrupt_Generic library to Library Manager. Thanks and Regards.
Features
This library enables you to use Interrupt from Hardware Timers on supported Arduino boards such as AVR, ESP8266, ESP32, SAMD, SAM DUE, nRF52, Teensy, etc.
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).
Notes for Teensy boards
You'd certainly experienced that if using other Hardware Timer Libraries, such as TimerOne or TimerThree, the interval is short, in milliseconds range.
For example, Teensy 4.x, with super-high clock frequency of 600MHz and Timer1 and Timer3 clock of 150MHz, the maximum interval / frequency is only 55922.3467 us / 17.881939 Hz. This TimerInterrupt_Generic library will provide you up to 16 super-long (ulong millisecs) ISR Timers for each used Timer1 or Timer3.
For Teensy 4.x, this library will be expanded to use other available hardware timers, such as FTM, GPT, QUAD, PIT, in addition to current Timer1 and Timer3.
Why do we need this Hardware Timer Interrupt?
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().
So your function might not be executed on-time or not at all, 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.
Releases v1.1.0
Currently Supported Boards
ESP8266
ESP32
AdaFruit Feather nRF52832, nRF52840 Express, BlueFruit Sense, Itsy-Bitsy nRF52840 Express, Metro nRF52840 Express, NINA_B302_ublox, NINA_B112_ublox etc..
Arduino SAMD21 (ZERO, MKR, NANO_33_IOT, etc.).
Adafruit SAM21 (Itsy-Bitsy M0, Metro M0, Feather M0, Gemma M0, etc.).
Adafruit SAM51 (Itsy-Bitsy M4, Metro M4, Grand Central M4, Feather M4 Express, etc.).
Seeeduino SAMD21/SAMD51 boards (SEEED_WIO_TERMINAL, SEEED_FEMTO_M0, SEEED_XIAO_M0, Wio_Lite_MG126, WIO_GPS_BOARD, SEEEDUINO_ZERO, SEEEDUINO_LORAWAN, SEEED_GROVE_UI_WIRELESS, etc.)
STM32 (Nucleo-144, Nucleo-64, Nucleo-32, Discovery, STM32F1, STM32F3, STM32F4, STM32H7, STM32L0, etc.).
STM32F/L/H/G/WB/MP1 (Nucleo-64 L053R8,Nucleo-144, Nucleo-64, Nucleo-32, Discovery, STM32Fx, STM32H7, STM32Lx, STM32Gx, STM32WB, STM32MP1, etc.) having 64K+ Flash program memory.
Teensy boards such as :
Arduino AVR boards such as :