/*
Name: K M AKASH
Program: C program in PICO simulator to blink the LED 10 times in the first minute, 
        20 times in the second minute & 30 times in third minute

*/

#include <stdio.h>
#include "pico/stdlib.h"    // Provides standard library functions
#include "pico/time.h"      // Provides libraries for working with time


#define LED_PIN 26

// Function to blink LED for desired number of times
void blinkLED(int times) {
  
    for (int i = 0; i < times; i++) {

        // LED ON
        gpio_put(LED_PIN, 1); 

        // 1 Second Delay
        sleep_ms(500); 

        // LED OFF
        gpio_put(LED_PIN, 0); 

        // 1 Second Delay
        sleep_ms(500); 
    }
}

// Main Function
int main() {

    // Initializing all standard Input/Output facilities provided by PICO SDK
    stdio_init_all();

    // Initialize GPIO pin 26 for LED
    gpio_init(LED_PIN); 

    // Set GPIO pin 26 as OUTPUT
    gpio_set_dir(LED_PIN, GPIO_OUT); 

    // Store the start time
    uint64_t start_time = time_us_64(); 


    // Blink LED 10 times in the first minute
    blinkLED(10);

    // Calculate the time elapsed since the start of the minute
    uint64_t elapsed_time = time_us_64() - start_time;

    // Calculate the remaining time in the minute (60 seconds - elapsed time)
    uint64_t remaining_time = 60000000 - elapsed_time;

    // Delay until the end of the minute
    sleep_us(remaining_time);



    // Store the start time for the second minute
    start_time = time_us_64(); 

    // Blink LED 20 times in the second minute
    blinkLED(20);

    // Calculate the time elapsed since the start of the minute
    elapsed_time = time_us_64() - start_time;

    // Calculate the remaining time in the minute (60 seconds - elapsed time)
    remaining_time = 60000000 - elapsed_time;

    // Delay until the end of the minute
    sleep_us(remaining_time);


    // Store the start time for the third minute
    start_time = time_us_64(); 

    // Blink LED 30 times in the third minute
    blinkLED(30);

    // Calculate the time elapsed since the start of the minute
    elapsed_time = time_us_64() - start_time;

    // Calculate the remaining time in the minute (60 seconds - elapsed time)
    remaining_time = 60000000 - elapsed_time;

    // Delay until the end of the minute
    sleep_us(remaining_time);

    return 0;
}