These define's must be placed at the beginning before #include "ESP32TimerInterrupt.h" #error This code is designed to run on ESP32 platform, not Arduino nor ESP8266! Please check your Tools->Board setting. You can also use interrupt to detect whenever the SW is active, set a flag then use timer to count the time between active state We use interrupt to detect whenever the SW is active, set a flag then use timer to count the time between active state If the time between active state is less than 8ms => consider noise. One rotation is detected by reading the state of a magnetic REED SW or IR LED Sensorįor example: Max speed is 600RPM => 10 RPS => minimum 100ms a rotation. RPM Measuring uses high frequency hardware timer 1Hz = 1ms) to measure the time from of one rotation, in ms Or the entire sequence of your code which accesses the data. If your data is multiple variables, such as an array and a count, usually interrupts need to be disabled If the interrupt changes a multi-byte variable between a sequence of instructions, it can be read incorrectly. When accessing shared variables, usually interrupts must be disabled. Because your function may change variables while your program is using them, Volatile tells the compiler to avoid optimizations that assume Variables usually need to be "volatile" types. Special design is necessary to share data between interrupt code and the rest of your program. Enhance README.ġ.1.0 K.Hoang Restore cpp code besides Impl.h code to use if Multiple-Definition linker error. ![]() Bump up to 1.0.2 to match ESP8266_ISR_TimerInterupt libraryġ.0.2 K.Hoang Permit up to 16 super-long-time, super-accurate ISR-based timers to avoid being blockedġ.0.3 K.Hoang Restructure code. This important feature is absolutely necessary for mission-critical tasks.īased on SimpleTimer - A timer library for Arduino.ġ.0.1 K Hoang No v1.0.1. Therefore, their executions are not blocked by bad-behaving functions / tasks. ![]() The most important feature is they're ISR-based timers The accuracy is nearly perfect compared to software timers. Unsigned long miliseconds), you just consume only one ESP32 timer and avoid conflicting with other cores' tasks. Now even you use all these new 16 ISR-based timers,with their maximum interval practically unlimited (limited only by Of the counter can be read by the software program. ![]() They can also generate alarms when they reach a specific value, defined by the software. The timer counters can be configured to count up or down and support automatic reloadĪnd software reload. All the timers are based on 64 bitsĬounters and 16 bit prescalers. The ESP32 has two timer groups, each one with two general purpose hardware timers. Here? -> TimerHandler0 () RPM_Measure.ino where can I find the result so that I can use it further? Shouldn't that actually appear as a result ?: When I start the serial monitor, it throws me out completely: I am beginning to understand what is happening in the code, but I do not understand the ejection. I'm trying to get some programming skills.
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