Embedded-Hacking/0x0014_static-variables/0x0014_static-variables.c

#include <stdio.h>
#include "pico/stdlib.h"

int main(void) {
    stdio_init_all();

    const uint BUTTON_GPIO = 15;
    const uint LED_GPIO = 16;
    bool pressed = 0;

    gpio_init(BUTTON_GPIO);
    gpio_set_dir(BUTTON_GPIO, GPIO_IN);
    gpio_pull_up(BUTTON_GPIO);

    gpio_init(LED_GPIO);
    gpio_set_dir(LED_GPIO, GPIO_OUT);

    while (true) {
        uint8_t regular_fav_num = 42;
        static uint8_t static_fav_num = 42;
        
        printf("regular_fav_num: %d\r\n", regular_fav_num);
        printf("static_fav_num: %d\r\n", static_fav_num);
        
        regular_fav_num++;
        static_fav_num++;
        
        pressed = gpio_get(BUTTON_GPIO);
        gpio_put(LED_GPIO, pressed ? 0 : 1);
    }
}