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M5StickC timer
/* NB: HAT speaker needs to be connected */
#include <M5StickC.h>
#include "esp32-hal-timer.h"
volatile int interruptCounter;
int totalInterruptCounter;
// https://techtutorialsx.com/2017/10/07/esp32-arduino-timer-interrupts/
hw_timer_t * timer = NULL; //Created Hardware Timer
portMUX_TYPE timerMux = portMUX_INITIALIZER_UNLOCKED;
int timer_secondsX10 = 0; // TODO: use hw timer instead
float accX = 0;
float accY = 0;
float accZ = 0;
bool started = 0;
void IRAM_ATTR onTimer() {
portENTER_CRITICAL_ISR(&timerMux);
interruptCounter++;
portEXIT_CRITICAL_ISR(&timerMux);
}
const int servo_pin = 26;
int freq = 50;
int ledChannel = 0;
int resolution = 10;
void setup() {
Serial.begin(115200);
//Timer
timer = timerBegin(0,80,true);//(Use timer 0,80Mhz crystal thus set divider of 80 -> (1/(80MHz/80)))
timerAttachInterrupt(timer,&onTimer,true);//Attach timer function to timer
timerAlarmWrite(timer,200000,true);//Set alarm to call timer fucntion every 1 second since 1 tick is 1 microsecond, third parameter is for it to repeat it
timerAlarmEnable(timer);//enable timer
Serial.println("Start Timer");
// put your setup code here, to run once:
M5.begin();
M5.IMU.Init();
M5.Lcd.setRotation(1);
M5.Lcd.fillScreen(BLACK);
M5.Lcd.setCursor(5, 0, 2);
M5.Lcd.printf("TIMER");
pinMode(M5_BUTTON_HOME, INPUT);
pinMode(M5_BUTTON_RST, INPUT);
ledcSetup(ledChannel, freq, resolution);
ledcAttachPin(servo_pin, ledChannel);
ledcWrite(ledChannel, 0);
delay(100);
}
void reset_timer() {
started = 0;
timer_secondsX10 = 0;
}
void timer_add_minutes(int x) {
timer_secondsX10 += 60 * x * 10;
}
void loop() {
M5.Lcd.setCursor(60, 30, 2);
int rem_seconds = int(timer_secondsX10 / 10) % 60;
int minutes = floor(timer_secondsX10 / 600);
M5.Lcd.printf("%2d:%2d", minutes, rem_seconds);
//M5.Lcd.setCursor(30, 61, 2);
//M5.Lcd.printf(" %.2f %.2f %.2f", accX, accY, accZ);
if (interruptCounter > 0) {
portENTER_CRITICAL(&timerMux);
interruptCounter--;
portEXIT_CRITICAL(&timerMux);
totalInterruptCounter++;
Serial.print("An interrupt as occurred. Total number: ");
Serial.println(totalInterruptCounter);
}
// Add a minute on a shake
M5.IMU.getAccelData(&accX,&accY,&accZ);
if (accX > 2.2 || accY > 2.2 ) {
timer_add_minutes(1);
delay(400); // Delay to avoid twice action
started = 1;
}
if(digitalRead(M5_BUTTON_HOME) == LOW){
timer_add_minutes(5);
delay(200); // Delay to avoid "twice press"
started = 1;
} else if(digitalRead(M5_BUTTON_RST) == LOW) {
reset_timer();
}
delay(100);
if(timer_secondsX10 > 0) {
timer_secondsX10 -= 1;
} else if(started) {
// Buzz six times
for (int16_t i = 0; i < 6; ++ i) {
ledcWriteTone(ledChannel, 1250);
delay(100);
ledcWriteTone(ledChannel, 0);
delay(20);
ledcWriteTone(ledChannel, 1300);
delay(100);
ledcWriteTone(ledChannel, 0);
delay(1000);
}
started = 0;
}
}
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