７セグタイマープログラム

 #include <Arduino.h>

#include <TM1637Display.h>

#define LED_PIN   23

#define BUTTON_PIN 18

#define CLK 17

#define DIO 16

hw_timer_t * timer = NULL;

volatile SemaphoreHandle_t timerSemaphore;

portMUX_TYPE timerMux = portMUX_INITIALIZER_UNLOCKED;

volatile uint32_t isrCounter = 0;

volatile uint32_t lastIsrAt = 0;

uint32_t resetTime = 0;

// put function declarations here:

void ARDUINO_ISR_ATTR onTimer(){

  // Increment the counter and set the time of ISR

  portENTER_CRITICAL_ISR(&timerMux);

  isrCounter++;

  lastIsrAt = millis();

  portEXIT_CRITICAL_ISR(&timerMux);

  // Give a semaphore that we can check in the loop

  xSemaphoreGiveFromISR(timerSemaphore, NULL);

  // It is safe to use digitalRead/Write here if you want to toggle an output

}

TM1637Display display(CLK, DIO);

void setup() {

  // put your setup code here, to run once:

  Serial.begin(115200);

  delay(100);

  Serial.printf("%s - run\n",__func__);

  pinMode(LED_PIN, OUTPUT);

  pinMode(BUTTON_PIN, INPUT_PULLUP);

  // Create semaphore to inform us when the timer has fired

  timerSemaphore = xSemaphoreCreateBinary();

  // Use 1st timer of 4 (counted from zero).

  // Set 80 divider for prescaler (see ESP32 Technical Reference Manual for more

  // info).

  timer = timerBegin(0, 80, true);

  // Attach onTimer function to our timer.

  timerAttachInterrupt(timer, &onTimer, true);

  // Set alarm to call onTimer function every second (value in microseconds).

  // Repeat the alarm (third parameter)

  timerAlarmWrite(timer, 1000000, true);

  // Start an alarm

  timerAlarmEnable(timer);

  display.setBrightness(0x0f);

}

void loop() {

  // put your main code here, to run repeatedly:

  uint32_t countsec;

  uint32_t countmin;

  uint32_t counthour;

  uint8_t sec;

  uint8_t min;

  uint8_t hour;

 

  if (xSemaphoreTake(timerSemaphore, 0) == pdTRUE){

    uint32_t isrCount = 0, isrTime = 0;

    // Read the interrupt count and time

    portENTER_CRITICAL(&timerMux);

    isrCount = isrCounter;

    isrTime = lastIsrAt;

    portEXIT_CRITICAL(&timerMux);

    countsec = (isrTime - resetTime) / 1000;

    sec = countsec % 60;

    countmin = (countsec - sec) /60;

    min = countmin % 60;

    counthour = (countmin-min)/60;

    hour = counthour % 24;

    display.showNumberDecEx((hour*100)+min, (0x80 >> 1), true); //Hour:Min

    //display.showNumberDecEx((min*100)+sec, (0x80 >> 1), true); //Min:Sec

    digitalWrite(LED_PIN, HIGH);

    delay(200);

    digitalWrite(LED_PIN, LOW);

  }

  if (digitalRead(BUTTON_PIN) == LOW) { // 23番ピンがLoの場合

    resetTime = millis();

  }

 

}

// put function definitions here: