M5Stack Core2 Countdown Interval Gym Timer

Countdown Interval Timer using M5Stack Core2 & LovyanGFX - aka. HIIT, Gym, Pomodoro, CrossFit, Boxing Timer with audio beeps the last 5 secs

IntermediateFull instructions provided-60 minutes437

M5Stack Core2 Countdown Interval Gym Timer

Things used in this project

Hardware components

M5Stack Core2 ESP32 IoT Development Kit

Software apps and online services

Arduino IDE

LovyanGFX

Story

I needed an timer for interval training as a part of a larger project and I usually like to get each individual component working independently before combining them together. As always, I search the internet to see if anybody had done something similar that I could utilise when I came across the Wio Terminal Timer here on Hackster.io and thought it looked interesting.

I also wanted to have a way to increase awareness of a GoFundMe campaign I am running for my Son to help get over his sever mental breakdown and thought having something to show would be better than just asking for donations.

Features

Allows the user to set the number of reps 1-99
Users can set the workout time to the second
users can set the rest time to the second
Users can pause then resume or reset both the timers
Alarm beeps for the last 5 seconds of each timer

Instructions

This countdown interval timer can be used in all kinds of activities right out the box, such as Boxing, HITT training, CrossFit, Sprint traning and so on. It could also be easily adapted to suit other situations (you could even boil an egg with it :) )

Currently, the flow of the app is fairly straightforward:-

Welcome Screen (Splash Screen)

Setup Screens

Set Number of Reps
Set Workout Timer
Set Rest Timer
Setup ScreensSet Number of RepsSet Workout TimerSet Rest Timer

Run Timer Screens

Start Screen
Run Workout Timer
Run Rest Timer
Repeat for Set Number of Reps
End Timer Screen
Run Timer ScreensStart ScreenRun Workout TimerRun Rest TimerRepeat for Set Number of RepsEnd Timer Screen
End Timer Screen

Each of the screen groups has a fairly uniform button usage:-

M5.BtnA/B/C.wasPressed() means a single tap M5.BtnA/B/C.pressedFor(500) means the button needs to be pressed for a given amount of time

Setup Screens use M5.BtnA.wasPressed() & M5.BtnB.wasPressed() to decrease/increase the digit value that the cursor is under and M5.BtnC.wasPressed() to move the cursor. Holding M5.BtnC.pressedFor(500) navigate to the next screen, so from Num Reps Setup to Set Work Timer and so on.

On the Start Screen the user taps the M5.BtnB.wasPressed() to set the timer running.

Run Timer Screen use M5.BtnB.wasPressed() to pause the countdown and either M5.BtnB.wasPressed() to resume timing or M5.BtnA.pressedFor(500) to cancel and return to the Setup routine.

On the End Timer Screen the user presses M5.BtnB.pressedFor(500) to return to the setup routine.

It sounds more complicated than it actually is and the video should clear things up nicely.

M5Stack-Core2-Interval-Timer

/*================================================================================*
    Core2 Animated Countdown Timer                     Version 1.01 - 21 May 2023

    This project was based on the Wio Terminal Timer 
    https://www.hackster.io/SeeedStudio/wio-terminal-timer-6afe8c
    
    and was developed to get the LovyaGFX library working with the M5Core2 library. 
    It also demonstrates how use a sound file with the Core2 without an external 
    library.

    Refer to the README document for setup and usage instructions.

    Copyright (C) 2023-     Damien Norris

    This work is licensed under the Creative Commons Attribution-NonCommercial-
    ShareAlike 3.0 Unported License. To view a copy of this license, visit 
    http://creativecommons.org/licenses/by-nc-sa/3.0/ or send a letter to 
    Creative Commons, 444 Castro Street, Suite 900, Mountain View, California, 
    94041, USA.
 *================================================================================*/

/*================================================================================*
   SETUP FOR APPLICATION -
 *================================================================================*/
#include <M5Core2.h>

#include "timer_tones.h"
#include "timerLogo.h"

#define LGFX_M5STACK_CORE2        // M5Stack M5Stack Core2
#define LGFX_AUTODETECT           // Automatic recognition (D-duino-32 XS, PyBadge seems to be excluded from automatic recognition because it cannot read the panel ID)

#include <LovyanGFX.hpp>          // Prepare header for lovyanGFX
#include <LGFX_AUTODETECT.hpp>    // Prepare class "LGFX"

static LGFX lcd;                  // Create an instance of LGFX (use the class LGFX to do things with the lcd command) 
static LGFX_Sprite ttext(&lcd);   // Create an instance of LGFX_Sprite when using sprites
static LGFX_Sprite arc(&lcd);

static auto transpalette = 0;

/*================================================================================*
   - END SETUP FOR APPLICATION -
 *================================================================================*/

////////////////////////////////////////////////////////////////////////////////////

/*================================================================================*
   - VARIABLES & CONSTANTS -
 *================================================================================*/
enum Mode {
  SET_NUM_REPS,
  SET_WORK_TIME,
  SET_TIMER_READY,
  RUN_WORK_TIME,
  PAUSE_WORK_TIME,
  END_WORK_TIME,
  SET_REST_TIME,
  RUN_REST_TIME,
  PAUSE_REST_TIME,
  RESET_TIMERS
};

enum Mode mode;

// Set the variables for the Number of Reps
int set_reps         = 1;
int pset_reps        = 0;
int remainingReps    = 1;

int numReps;

int c_pos = 0;
int p_pos = 0;

int rep_pos[] = { 120, 152};
int rep_inc[] = { 10, 1 };

// Set the variables for the Workout Timer
unsigned int set_time   = 60;
unsigned int pset_time  =  0;
unsigned int remainingTime;

int workMins = 0;
int workSecs = 0;

unsigned long p_millis;
unsigned long c_millis;

// Set the variables for the Rest Period Timer
unsigned int set_rest_time   = 60;
unsigned int pset_rest_time  =  0;
unsigned int remainingRestTime;

int restMins = 0;
int restSecs = 0;

unsigned long w_millis;
unsigned long x_millis;

// Set the shared variables for both Timers
unsigned long lastBeepTime  =  0;

int sound = 0;

int pos[] = { 91, 123, 167, 199 };
int inc[] = { 600, 60, 10, 1 };

byte buttonCounter   = 0;

/*================================================================================*
   - END VARIABLES & CONSTANTS -
 *================================================================================*/

 ////////////////////////////////////////////////////////////////////////////////////

/*================================================================================*
   - AUDIO SETUP -
 *================================================================================*/
//                                0,       1,      
const unsigned char *wavList[] = {sec_beep, countdownTimer};
const size_t wavSize[] = {sizeof(sec_beep), sizeof(countdownTimer)};

#define CONFIG_I2S_BCK_PIN      12
#define CONFIG_I2S_LRCK_PIN     0
#define CONFIG_I2S_DATA_PIN     2
#define CONFIG_I2S_DATA_IN_PIN  34

#define SPEAKER_I2S_NUMBER      I2S_NUM_0

#define MODE_MIC                0
#define MODE_SPK                1

void InitI2SSpeakerOrMic(int mode) {
  esp_err_t err = ESP_OK;

  i2s_driver_uninstall(SPEAKER_I2S_NUMBER);
  i2s_config_t i2s_config = {
    .mode                 = (i2s_mode_t)(I2S_MODE_MASTER),
    .sample_rate          = 16000,
    .bits_per_sample      = I2S_BITS_PER_SAMPLE_16BIT,
    .channel_format       = I2S_CHANNEL_FMT_ALL_RIGHT,
    .communication_format = I2S_COMM_FORMAT_I2S,
    .intr_alloc_flags     = ESP_INTR_FLAG_LEVEL1,
    .dma_buf_count        = 6,
    .dma_buf_len          = 60,
    .use_apll             = false,
    .tx_desc_auto_clear   = true,
    .fixed_mclk           = 0
  };
  if (mode == MODE_MIC) {
    i2s_config.mode = (i2s_mode_t)(I2S_MODE_MASTER | I2S_MODE_RX | I2S_MODE_PDM);
  } else {
    i2s_config.mode = (i2s_mode_t)(I2S_MODE_MASTER | I2S_MODE_TX);
  }

  err += i2s_driver_install(SPEAKER_I2S_NUMBER, &i2s_config, 0, NULL);

  i2s_pin_config_t tx_pin_config = {
    .bck_io_num           = CONFIG_I2S_BCK_PIN,
    .ws_io_num            = CONFIG_I2S_LRCK_PIN,
    .data_out_num         = CONFIG_I2S_DATA_PIN,
    .data_in_num          = CONFIG_I2S_DATA_IN_PIN,
  };
  err += i2s_set_pin(SPEAKER_I2S_NUMBER, &tx_pin_config);

  if (mode != MODE_MIC) {
    err += i2s_set_clk(SPEAKER_I2S_NUMBER, 16000, I2S_BITS_PER_SAMPLE_16BIT, I2S_CHANNEL_MONO);
  }

  i2s_zero_dma_buffer(SPEAKER_I2S_NUMBER);
}

/*================================================================================*
   - END AUDIO SETUP -
 *================================================================================*/

////////////////////////////////////////////////////////////////////////////////////

/*================================================================================*
   - TIMER DISPLAY FUNCTION -
 *================================================================================*/
void disp_num_reps(int num_reps) {              //  Display Set Reps Digits
  ttext.setCursor(0, 0);
  ttext.setTextColor(GREEN, 0);
  ttext.printf("%02d", num_reps);
  ttext.pushRotateZoom(190, 115, 0, 1, 1);
}

void disp_time(int d_min, int d_sec) {          //  Display Timer
  arc.pushRotateZoom(160, 120, 0, 1.5, 1);
  ttext.setCursor(0, 0);
  ttext.setTextColor(DARKCYAN, 0);
  ttext.printf("%02d:%02d", d_min, d_sec);
  ttext.pushRotateZoom(160, 115, 0, 1, 1);
}

void disp_rest_time(int d_min, int d_sec) {     //  Display Timer
  arc.pushRotateZoom(160, 120, 0, 1.5, 1);
  ttext.setCursor(0, 0);
  ttext.setTextColor(MAROON, 0);
  ttext.printf("%02d:%02d", d_min, d_sec);
  ttext.pushRotateZoom(160, 115, 0, 1, 1);
}

/*================================================================================*
   - END TIMER DISPLAY FUNCTION -
 *================================================================================*/

////////////////////////////////////////////////////////////////////////////////////

/*================================================================================*
   - MAIN SETUP FUNCTION -
 *================================================================================*/
void setup() {
  M5.begin();

  lcd.init();

  Serial.begin(115200);

  lcd.setBrightness(255);
  lcd.setColorDepth(16);
  lcd.clear();

  ttext.setFont(&fonts::Font7);
  lcd.fillScreen(BLACK);

  arc.setColorDepth(16);
  ttext.setColorDepth(16);

  arc.createSprite(240, 200);
  ttext.createSprite(140, 60);

  arc.fillScreen(transpalette);
  ttext.fillScreen(transpalette);
  lcd.fillScreen(transpalette);

  arc.fillArc(80, 80, 75, 80, 0, 360, GREEN);

  arc.setPivot(80, 80);
  ttext.setPivot(70, 15);

  lcd.setTextColor(WHITE, 0);
  lcd.setTextSize(2);

/************************** Display Logo ***************************/
  lcd.startWrite();

  lcd.pushImage(0, 0, timerLogoWidth, timerLogoHeight, timerLogo);
/*******************************************************************/

  delay(5000);

  lcd.clear();

  mode = SET_NUM_REPS;
}

/*================================================================================*
   - END MAIN SETUP FUNCTION -
 *================================================================================*/

////////////////////////////////////////////////////////////////////////////////////

/*================================================================================*
   - MAIN LOOP FUNCTION -
 *================================================================================*/
void loop() {
  M5.update();

  switch (mode) {
    case SET_NUM_REPS:
      set_num_reps();
      break;
    case SET_WORK_TIME:
      set_work_timer();
      break;
    case SET_REST_TIME:
      set_rest_timer();
      break;
    case SET_TIMER_READY:
      run_timer_ready();
      break;
    case RUN_WORK_TIME:
      run_work_timer();
      break;
    case PAUSE_WORK_TIME:
      work_timer_paused();
      break;
    case RUN_REST_TIME:
      run_rest_timer();
      break;
    case PAUSE_REST_TIME:
      rest_timer_paused();
      break;
    case RESET_TIMERS:
      reset_timers();
      break;
  }

  // Uses long press on the same button to navigate functions
  if (M5.BtnC.pressedFor(500)) {    
    delay(1000);

    buttonCounter++;

    Serial.println(buttonCounter);

    // set the number of reps -> set the workout timer
    if (mode == SET_NUM_REPS && set_reps >= 1 && buttonCounter == 1) {
      arc.fillArc(80, 80, 75, 80, 0, 360, GREEN);
      mode = SET_WORK_TIME;
    }
    // set the workout timer -> set the rest timer
    else if (mode == SET_WORK_TIME && buttonCounter == 2) {
      arc.fillArc(80, 80, 75, 80, 0, 360, RED);
      mode = SET_REST_TIME;
    } 
    // set the rest timer -> load the timers ready function
    else if (mode == SET_REST_TIME && buttonCounter == 3) {
      lcd.clear();

      arc.fillArc(80, 80, 75, 80, 0, 360, GREEN);
      workMins = set_time / 60;
      workSecs = set_time % 60;
      disp_time(workMins, workSecs);
      remainingTime = set_time;
      mode = SET_TIMER_READY;
    } 
  }
}  

/*================================================================================*
   - END MAIN LOOP FUNCTION -
 *================================================================================*/

////////////////////////////////////////////////////////////////////////////////////

/*================================================================================*
   - SET NUMBER OF REPS FUNCTION -
 *================================================================================*/
void set_num_reps() {

  lcd.setFont(&fonts::Font4);
  lcd.drawString("SET NUM REPS:", 15, 5, 1);
  lcd.drawString("DOWN", 15, 220, 1);
  lcd.drawString("UP", 155, 220, 1);
  lcd.drawString("MOVE", 255, 220, 1);
  lcd.drawString("NEXT/", 255, 190, 1);

  if (M5.BtnC.wasPressed()) {                         // move set up cursor next
    lcd.drawFastHLine(rep_pos[c_pos], 148, 30, 0);
    c_pos++;
    if (c_pos > 1) c_pos = 0;
    lcd.drawFastHLine(rep_pos[c_pos], 148, 30, GREEN);
  }

  /*if (M5.BtnC.wasPressed()) {                       // move set up cursor previous
    lcd.drawFastHLine(pos[c_pos], 148, 30, 0);
    c_pos--;
    if (c_pos < 0) c_pos = 3;
    lcd.drawFastHLine(pos[c_pos], 148, 30, WHITE);
  }*/

  if (M5.BtnB.wasPressed()) {                         // increase figure on cursor
    set_reps += rep_inc[c_pos];
    if (set_reps > 99) {
      set_reps -= rep_inc[c_pos];
    }
  }

  if (M5.BtnA.wasPressed()) {                         // decrease figure on cursor
    set_reps -= rep_inc[c_pos];
    if (set_reps == 99) {
      set_reps += rep_inc[c_pos];
    }
  }

  if (set_reps != pset_reps) {
    numReps = set_reps;
    disp_num_reps(numReps);
    lcd.drawFastHLine(rep_pos[c_pos], 148, 30, GREEN);
  }
  pset_reps = set_reps;
}

 /*================================================================================*
   - END NUMBER OF REPS FUNCTION -
 *================================================================================*/

////////////////////////////////////////////////////////////////////////////////////

/*================================================================================*
   - SET UP TIMER FUNCTION -
 *================================================================================*/
void set_work_timer() {

  lcd.setFont(&fonts::Font4);
  lcd.drawString("SET WORK TIMER:", 15, 5, 1);
  lcd.drawString("DOWN", 15, 220, 1);
  lcd.drawString("UP", 155, 220, 1);
  lcd.drawString("MOVE", 255, 220, 1);
  lcd.drawString("NEXT/", 255, 190, 1);

  if (M5.BtnC.wasPressed()) {                         // move set up cursor next
    lcd.drawFastHLine(pos[c_pos], 148, 30, 0);
    c_pos++;
    if (c_pos > 3) c_pos = 0;
    lcd.drawFastHLine(pos[c_pos], 148, 30, WHITE);
  }

  /*if (M5.BtnC.wasPressed()) {                       // move set up cursor previous
    lcd.drawFastHLine(pos[c_pos], 148, 30, 0);
    c_pos--;
    if (c_pos < 0) c_pos = 3;
    lcd.drawFastHLine(pos[c_pos], 148, 30, WHITE);
  }*/

  if (M5.BtnB.wasPressed()) {                         // increase figure on cursor
    set_time += inc[c_pos];
    if (set_time > 5999) {
      set_time -= inc[c_pos];
      set_time = set_time % inc[c_pos];
    }
  }

  if (M5.BtnA.wasPressed()) {                         // decrease figure on cursor
    set_time -= inc[c_pos];
    if (set_time > 5999) {
      set_time += inc[c_pos];
      set_time = set_time % inc[c_pos];
    }
  }

  if (set_time != pset_time) {
    workMins = set_time / 60;
    workSecs = set_time % 60;
    disp_time(workMins, workSecs);
    lcd.drawFastHLine(pos[c_pos], 148, 30, WHITE);
  }
  pset_time = set_time;
}

void set_rest_timer() {

  lcd.setFont(&fonts::Font4);
  lcd.drawString("SET REST TIMER:", 15, 5, 1);
  lcd.drawString("DOWN", 15, 220, 1);
  lcd.drawString("UP", 155, 220, 1);
  lcd.drawString("MOVE", 255, 220, 1);
  lcd.drawString("NEXT/", 255, 190, 1);

  if (M5.BtnC.wasPressed()) {                         // move set up cursor next
    lcd.drawFastHLine(pos[c_pos], 148, 30, 0);
    c_pos++;
    if (c_pos > 3) c_pos = 0;
    lcd.drawFastHLine(pos[c_pos], 148, 30, WHITE);
  }

  /*if (M5.BtnC.wasPressed()) {                       // move set up cursor previous
    lcd.drawFastHLine(pos[c_pos], 148, 30, 0);
    c_pos--;
    if (c_pos < 0) c_pos = 3;
    lcd.drawFastHLine(pos[c_pos], 148, 30, WHITE);
  }*/

  if (M5.BtnB.wasPressed()) {                        // increase figure on cursor
    set_rest_time += inc[c_pos];
    if (set_rest_time > 5999) {
      set_rest_time -= inc[c_pos];
      set_rest_time = set_rest_time % inc[c_pos];
    }
  }

  if (M5.BtnA.wasPressed()) {                       // decrease figure on cursor
    set_rest_time -= inc[c_pos];
    if (set_rest_time > 5999) {
      set_rest_time += inc[c_pos];
      set_rest_time = set_rest_time % inc[c_pos];
    }
  }

  if (set_rest_time != pset_rest_time) {
    restMins = set_rest_time / 60;
    restSecs = set_rest_time % 60;
    disp_rest_time(restMins, restSecs);
    lcd.drawFastHLine(pos[c_pos], 148, 30, WHITE);
  }
  pset_rest_time = set_rest_time;
}

/*================================================================================*
   - END SET UP TIMER FUNCTION -
 *================================================================================*/

////////////////////////////////////////////////////////////////////////////////////

/*================================================================================*
   - TIMER READY FUNCTION -
 *================================================================================*/
void run_timer_ready() {

  display_rep_count();

  lcd.setFont(&fonts::Font4);
  lcd.drawString("____", 15, 220, 1);
  lcd.drawString("START", 135, 220, 1);
  lcd.drawString("____", 255, 220, 1);

  if (M5.BtnB.wasPressed()) {
    lcd.clear();
    mode = RUN_WORK_TIME;
  }
}

/*================================================================================*
   - END TIMER READY FUNCTION -
 *================================================================================*/

////////////////////////////////////////////////////////////////////////////////////

/*================================================================================*
   - RUN TIMER FUNCTION -
 *================================================================================*/
void run_work_timer() {

  display_rep_count();

  lcd.setFont(&fonts::Font4);
  lcd.drawString("____", 15, 220, 1);
  lcd.drawString("PAUSE", 135, 220, 1);
  lcd.drawString("____", 255, 220, 1);

  if (M5.BtnB.wasPressed()) {
    mode = PAUSE_WORK_TIME;
  }

  c_millis = millis();
  if (c_millis - p_millis >= 1000) {
    p_millis = c_millis;
    remainingTime--;
    if (set_time > 5999) remainingTime = 0;

    arc.clear();
    if ((360 * remainingTime) / set_time < 90) arc.fillArc(80, 80, 75, 80, 270, 270 + 360 * remainingTime / set_time, GREEN);
    else arc.fillArc(80, 80, 75, 80, 270, (360 * remainingTime) / set_time - 90, GREEN);
    arc.pushRotateZoom(160, 120, 0, 1.5, 1);

    workMins = remainingTime / 60;
    workSecs = remainingTime % 60;
    disp_time(workMins, workSecs);

  } 

  if (remainingTime <= 5) {
    if (millis() - lastBeepTime >= 1000) {
	    size_t bytes_written;
      
      M5.Axp.SetSpkEnable(true);
      InitI2SSpeakerOrMic(MODE_SPK);
  
	    i2s_write(SPEAKER_I2S_NUMBER, wavList[0], wavSize[0], &bytes_written, portMAX_DELAY);
      i2s_zero_dma_buffer(SPEAKER_I2S_NUMBER);
	  
	    // Set Mic Mode
      InitI2SSpeakerOrMic(MODE_MIC);
      M5.Axp.SetSpkEnable(false);
  
      lastBeepTime = millis();
    }
  }

  if (remainingTime < 1) {
    lastBeepTime = 0;
    
    lcd.clear();

    delay(1000);

    restMins = set_rest_time / 60;
    restSecs = set_rest_time % 60;
    disp_rest_time(restMins, restSecs);
    remainingRestTime = set_rest_time;
    mode = RUN_REST_TIME;
  }
}

void run_rest_timer() {

  display_rep_count();

  lcd.setFont(&fonts::Font4);
  lcd.drawString("____", 15, 220, 1);
  lcd.drawString("PAUSE", 135, 220, 1);
  lcd.drawString("____", 255, 220, 1);

  if (M5.BtnB.wasPressed()) {
    mode = PAUSE_REST_TIME;
  }

  x_millis = millis();
  if (x_millis - w_millis >= 1000) {
    w_millis = x_millis;
    remainingRestTime--;
    if (set_rest_time > 5999) remainingRestTime = 0;

    arc.clear();
    if ((360 * remainingRestTime) / set_rest_time < 90) arc.fillArc(80, 80, 75, 80, 270, 270 + 360 * remainingRestTime / set_rest_time, RED);
    else arc.fillArc(80, 80, 75, 80, 270, (360 * remainingRestTime) / set_rest_time - 90, RED);
    arc.pushRotateZoom(160, 120, 0, 1.5, 1);

    restMins = remainingRestTime / 60;
    restSecs = remainingRestTime % 60;
    disp_rest_time(restMins, restSecs);

  }

  if (remainingRestTime <= 5) {
    if (millis() - lastBeepTime >= 1000) {
	    size_t bytes_written;
      
      M5.Axp.SetSpkEnable(true);
      InitI2SSpeakerOrMic(MODE_SPK);
  
	    i2s_write(SPEAKER_I2S_NUMBER, wavList[0], wavSize[0], &bytes_written, portMAX_DELAY);
      i2s_zero_dma_buffer(SPEAKER_I2S_NUMBER);
	  
	    // Set Mic Mode
      InitI2SSpeakerOrMic(MODE_MIC);
      M5.Axp.SetSpkEnable(false);
  
      lastBeepTime = millis();
    }
  }

  if (remainingRestTime < 1 && remainingReps < set_reps) {
    remainingReps++;

    lastBeepTime = 0;
    
    lcd.clear();

    delay(1000);

    workMins = set_time / 60;
    workSecs = set_time % 60;
    disp_time(workMins, workSecs);
    remainingTime = set_time;
    mode = RUN_WORK_TIME;
  }

  else if (remainingRestTime < 1 && remainingReps <= set_reps) {
    lcd.clear();

    set_rest_time = 0;

    restMins = set_rest_time / 60;
    restSecs = set_rest_time % 60;
    disp_rest_time(restMins, restSecs);
    remainingRestTime = set_rest_time;

    mode = RESET_TIMERS;
  }
}

/*================================================================================*
   - END RUN TIMER FUNCTION -
 *================================================================================*/

////////////////////////////////////////////////////////////////////////////////////

/*================================================================================*
    TIMER PAUSED FUNCTION -
 *================================================================================*/
void work_timer_paused() {

  display_rep_count();

  lcd.setFont(&fonts::Font4);
  lcd.drawString("RESET", 15, 220, 1);
  lcd.drawString("RESUME", 135, 220, 1);
  lcd.drawString("____", 255, 220, 1);

  if (M5.BtnB.wasPressed()) {
    mode = RUN_WORK_TIME;
  }

  if (M5.BtnA.pressedFor(500)) {
    reset_variables();
  } 
}

void rest_timer_paused() {

  display_rep_count();

  lcd.setFont(&fonts::Font4);
  lcd.drawString("RESET", 15, 220, 1);
  lcd.drawString("RESUME", 135, 220, 1);
  lcd.drawString("____", 255, 220, 1);

  if (M5.BtnB.wasPressed()) {
    mode = RUN_REST_TIME;
  }

  if (M5.BtnA.pressedFor(500)) {
    reset_variables();
  }  
}

/*================================================================================*
   - END TIMER PAUSED FUNCTION -
 *================================================================================*/

////////////////////////////////////////////////////////////////////////////////////

/*================================================================================*
   - TIMER FINISHED FUNCTION -
 *================================================================================*/
void reset_timers() {

  display_rep_count();

  lcd.setFont(&fonts::Font4);
  lcd.drawString("____", 15, 220, 1);
  lcd.drawString("RESET", 135, 220, 1);
  lcd.drawString("____", 255, 220, 1);

  if (M5.BtnB.pressedFor(500)) {
    reset_variables();
  }
}

/*================================================================================*
   - END TIMER FINISHED FUNCTION -
 *================================================================================*/

////////////////////////////////////////////////////////////////////////////////////

/*================================================================================*
   - REP COUNT DISPLAY FUNCTION -
 *================================================================================*/
void display_rep_count() {
  lcd.setFont(&fonts::Font2);

  if (!(mode == RESET_TIMERS)) {
    lcd.setCursor (260, 15);
    lcd.printf("%d/%d", remainingReps, set_reps);
  } else {
    lcd.drawString("DONE!", 260, 15, 1);
  }
}

/*================================================================================*
   - END REP COUNT DISPLAY FUNCTION -
 *================================================================================*/

////////////////////////////////////////////////////////////////////////////////////

/*================================================================================*
   - RESET VARIABLES FUNCTION -
 *================================================================================*/
void reset_variables() {
  lcd.clear();
  ttext.clear();

  set_reps        =  1;
  pset_reps       =  0;
  set_time        = 60;
  pset_time       =  0;
  set_rest_time   = 60;
  pset_rest_time  =  0;
  c_pos           =  0;
  p_pos           =  0;
  remainingReps   =  1;
  buttonCounter   =  0;

  mode = SET_NUM_REPS;
}

 /*================================================================================*
   - END RESET VARIABLES FUNCTION -
 *================================================================================*/

////////////////////////////////////////////////////////////////////////////////////

Credits

Damien Norris

Posted by

chuck808

Thanks to プロフィール.

M5Stack Core2 Countdown Interval Gym Timer