en-us_commands:reference:itimerstopall
This is an old revision of the document!
Table of Contents
ItimerStopAll()
Commands
| Command | Arguments | Return Value | Operation |
|---|---|---|---|
ItimerStopAll() | None | void | Stops all running callback timers. |
Example
const uint8_t CALLBACK_TIMER = 3; volatile bool sampleDue = false; void sampleTask() { sampleDue = true; } void setup() { Serial.begin(115200); if (!ItimerSet(CALLBACK_TIMER, 100, sampleTask)) { // Set the interval and callback function, or select the hardware timer to use. Serial.println(F("timer setup failed")); return; } ItimerStart(CALLBACK_TIMER); // Start the configured callback timer. } void loop() { if (sampleDue) { noInterrupts(); sampleDue = false; interrupts(); Serial.println(analogRead(A0)); // Read the raw analog value of the specified channel. } const bool pause = IdigitalRead(0, 5); // Read the input repeatedly and update only if all samples match. If HIGH and LOW are mixed, retain the previous stable state. if (pause && ItimerState(CALLBACK_TIMER)) ItimerStop(CALLBACK_TIMER); // Return the running state of the default or specified callback timer. / Stop the default or specified callback timer. if (!pause && !ItimerState(CALLBACK_TIMER)) ItimerStart(CALLBACK_TIMER); // Start the configured callback timer. / Return the running state of the default or specified callback timer. if (IdigitalRead(1, 5)) ItimerStopAll(); // Stop all running callback timers. / Read the input repeatedly and update only if all samples match. If HIGH and LOW are mixed, retain the previous stable state. }
Precautions
- Timer interrupt callbacks run inside an ISR. For safety, change only flags in the callback and perform actual control processing in
loop(). - Do not use slow or interrupt-dependent code such as
delay(),Serial, I2C or SPI in callbacks. - Normally, call
ImodbusRTU()repeatedly inloop(). Call it from a timer interrupt with a sufficient interval only when longdelay()calls or debug output slow downloop(). - Do not use the default
ItimerSet()together withtone()using Timer2 oranalogWrite()on Timer2 PWM pins. - Explicitly using Timer1, Timer3, Timer4 or Timer5 may conflict with PWM, analog output or high-speed counter functions using that timer.
- Configure only one
Itimercallback per hardware timer. - Defining an ISR for the same timer directly in the sketch may conflict with
Itimeroperation. ItimerStopAll()stops only hardware interrupt timers. It does not reset PLC-style timer states such asIton,ItoforItmr.
Built-in Commands in the Same Category
en-us_commands/reference/itimerstopall.1788796403.txt.gz · Last modified: by 127.0.0.1
