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Argument_Complex.ino
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Argument_Complex.ino
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/****************************************************************************************************************************
Argument_Complex.ino
For MBED RP2040-based boards such as Nano_RP2040_Connect, RASPBERRY_PI_PICO, ADAFRUIT_FEATHER_RP2040 and GENERIC_RP2040.
Written by Khoi Hoang
Built by Khoi Hoang https://github.com/khoih-prog/TimerInterrupt_Generic
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: [email protected]
Copyright (c) 2010 OTTOTECNICA Italy
Based on BlynkTimer.h
Author: Volodymyr Shymanskyy
*****************************************************************************************************************************/
#if ( defined(ARDUINO_NANO_RP2040_CONNECT) || defined(ARDUINO_RASPBERRY_PI_PICO) || defined(ARDUINO_ADAFRUIT_FEATHER_RP2040) || \
defined(ARDUINO_GENERIC_RP2040) ) && defined(ARDUINO_ARCH_MBED)
#define USING_MBED_RPI_PICO_TIMER_INTERRUPT true
#else
#error This code is intended to run on the MBED RASPBERRY_PI_PICO platform! Please check your Tools->Board setting.
#endif
// These define's must be placed at the beginning before #include "TimerInterrupt_Generic.h"
// _TIMERINTERRUPT_LOGLEVEL_ from 0 to 4
#define _TIMERINTERRUPT_LOGLEVEL_ 4
#include "TimerInterrupt_Generic.h"
#ifndef LED_BUILTIN
#define LED_BUILTIN 25 // Pin LED_BUILTIN mapped to pin GPIO25 of RPI_PICO, control on-board LED
#endif
// MAX_RPI_PICO_NUM_TIMERS = 4. Change the pin accroding to your test
unsigned int pinArray[MAX_RPI_PICO_NUM_TIMERS] = { LED_BUILTIN, LED_BUILTIN, LED_BUILTIN, LED_BUILTIN };
// Init RPI_PICO_Timer
MBED_RPI_PICO_Timer ITimer1(1);
// Never use Serial.print inside this mbed ISR. Will hang the system
void TimerHandler(uint alarm_num)
{
static bool toggle = false;
///////////////////////////////////////////////////////////
// Always call this for MBED RP2040 before processing ISR
TIMER_ISR_START(alarm_num);
///////////////////////////////////////////////////////////
digitalWrite(pinArray[alarm_num], toggle);
toggle = !toggle;
////////////////////////////////////////////////////////////
// Always call this for MBED RP2040 after processing ISR
TIMER_ISR_END(alarm_num);
////////////////////////////////////////////////////////////
}
#define TIMER_INTERVAL_MS 1000
void setup()
{
for (uint8_t i = 0; i < MAX_RPI_PICO_NUM_TIMERS; i++)
{
pinMode(pinArray[i], OUTPUT);
}
Serial.begin(115200);
while (!Serial);
Serial.print(F("\nStarting Argument_Complex on ")); Serial.println(BOARD_NAME);
Serial.println(MBED_RPI_PICO_TIMER_INTERRUPT_VERSION);
Serial.println(TIMER_INTERRUPT_GENERIC_VERSION);
// Interval in microsecs
if (ITimer1.attachInterruptInterval(TIMER_INTERVAL_MS * 1000, TimerHandler))
{
Serial.print(F("Starting ITimer1 OK, millis() = ")); Serial.println(millis());
}
else
Serial.println(F("Can't set ITimer1. Select another freq. or timer"));
}
void loop()
{
}