Khoi Hoang
b99aafc23a
### Releases v1.3.0 1. Fix affecting time between the starts. Check [Enable fixed timing between timer calls (vs fixed time btw. end of timer call and next call as implemented) #3](https://github.com/khoih-prog/RPI_PICO_TimerInterrupt/issues/3)
51 lines
2.4 KiB
C
51 lines
2.4 KiB
C
/****************************************************************************************************************************
|
|
RPi_Pico_ISR_Timer.h
|
|
For RP2040-based boards such as RASPBERRY_PI_PICO, ADAFRUIT_FEATHER_RP2040 and GENERIC_RP2040.
|
|
Written by Khoi Hoang
|
|
|
|
Built by Khoi Hoang https://github.com/khoih-prog/RPI_PICO_TimerInterrupt
|
|
Licensed under MIT license
|
|
|
|
The RPI_PICO system timer peripheral provides a global microsecond timebase for the system, and generates
|
|
interrupts based on this timebase. It supports the following features:
|
|
• A single 64-bit counter, incrementing once per microsecond
|
|
• This counter can be read from a pair of latching registers, for race-free reads over a 32-bit bus.
|
|
• Four alarms: match on the lower 32 bits of counter, IRQ on match: TIMER_IRQ_0-TIMER_IRQ_3
|
|
|
|
Now even you use all these new 16 ISR-based timers,with their maximum interval practically unlimited (limited only by
|
|
unsigned long miliseconds), you just consume only one RPI_PICO timer and avoid conflicting with other cores' tasks.
|
|
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.
|
|
|
|
Based on SimpleTimer - A timer library for Arduino.
|
|
Author: mromani@ottotecnica.com
|
|
Copyright (c) 2010 OTTOTECNICA Italy
|
|
|
|
Based on BlynkTimer.h
|
|
Author: Volodymyr Shymanskyy
|
|
|
|
Version: 1.3.0
|
|
|
|
Version Modified By Date Comments
|
|
------- ----------- ---------- -----------
|
|
1.0.0 K Hoang 11/05/2021 Initial coding to support RP2040-based boards such as RASPBERRY_PI_PICO. etc.
|
|
1.0.1 K Hoang 18/05/2021 Update README and Packages' Patches to match core arduino-pico core v1.4.0
|
|
1.1.0 K Hoang 10/00/2021 Add support to new boards using the arduino-pico core
|
|
1.1.1 K Hoang 22/10/2021 Fix platform in library.json for PIO
|
|
1.2.0 K.Hoang 21/01/2022 Fix `multiple-definitions` linker error
|
|
1.3.0 K.Hoang 25/09/2022 Fix severe bug affecting time between the starts
|
|
*****************************************************************************************************************************/
|
|
|
|
#pragma once
|
|
|
|
#ifndef ISR_TIMER_GENERIC_H
|
|
#define ISR_TIMER_GENERIC_H
|
|
|
|
#include "RPi_Pico_ISR_Timer.hpp"
|
|
#include "RPi_Pico_ISR_Timer-Impl.h"
|
|
|
|
#endif // ISR_TIMER_GENERIC_H
|
|
|
|
|