This repository was archived by the owner on Jan 29, 2023. It is now read-only.
This repository was archived by the owner on Jan 29, 2023. It is now read-only.
ESP8266Timer and PWM --> wdt reset #8
Description
Hi,
I try to create a "glow" at certain intervals. Current design is that I loop through my sinus-table with 60 ms and do a analogWrite(), stop at the end of the sinus-loop, then wait some time and then rinse repeat. Looping the 60 ms does not work soooo well, as you already wrote.
To run more smoothly I thought of using the ESP8266Timer to switch the 60 ms-pwm change. For demonstration the restart is done in a simple ticker-loop().
All I get is nothing near a glow but watchdog resets. "analogWrite();" seems to be the offender.
Any ideas? What did I miss?
#include "ESP8266TimerInterrupt.h" #ifndef LED_BUILTIN #define LED_BUILTIN 2 // Pin D4 mapped to pin GPIO2/TXD1 of ESP8266, NodeMCU and WeMoS, control on-board LED #endif const int sinus[] = { 0, 20, 45, 89, 134, 178, 221, 265, 308, 350, 391, 432, 472, 512, 550, 587, 623, 658, 691, 723, 754, 784, 812, 838, 863, 886, 907, 927, 945, 961, 976, 988, 999, 1007, 1014, 1019, 1022, 1023, 1023, 1023 }; const int sinuslen = sizeof(sinus) / sizeof(sinus[0]); const int sinusschrittzeit = 60; const long sinusdauer = sinusschrittzeit * sinuslen; volatile int step = 0; volatile int direction = 1; ESP8266Timer ITimer; void ICACHE_RAM_ATTR TimerHandler(void) { analogWrite(LED_BUILTIN, sinus[step]); step += direction; if (step < 0) { step = 0; direction = 1; ITimer.disableTimer(); } if (step > sinuslen - 1) { step = sinuslen - 1; direction = -1; } } void setup() { Serial.begin(115200); while (!Serial); pinMode(LED_BUILTIN, OUTPUT); // Interval in microsecs if (ITimer.attachInterruptInterval(60L * 1000L, TimerHandler)) { ITimer.disableTimer(); Serial.println("\n\nStarting ITimer OK"); } else Serial.println("\n\nCan't set ITimer correctly. Select another freq. or interval"); } void loop() { static unsigned long ticker = 0; if (millis() - ticker > 6000) { step = 0; direction = 1; ticker = millis(); ITimer.enableTimer(); } }