led.c

Go to the documentation of this file.

#include <esp8266.h>
#include "debug.h"
#include "led.h"

static os_timer_t led_blinker_timer;
static os_timer_t led_single_blink_off_timer;

static os_timer_t led_double_blink_timer;
static os_timer_t led_sub_pattern_timer;

static volatile bool led_blinker_timer_running = false;
static volatile bool led_double_blinker_timer_running = false;

static uint8_t led_sub_pattern_state = 0;

ICACHE_FLASH_ATTR void static led_blinker_timer_func(void *arg) {
    if (led_blinker_timer_running == false) {
        // stop blinking if asked to stop via state variable led_blinker_timer_running
        os_timer_disarm(&led_blinker_timer);
        return;
    }   

    // do blinky stuff
    if (GPIO_REG_READ(GPIO_OUT_ADDRESS) & BIT2) {
        led_on();
    }
    else {
        led_off();
    }
}

ICACHE_FLASH_ATTR void static led_single_blink_off_timer_func(void *arg) {
    led_off();
}
    
ICACHE_FLASH_ATTR void static led_double_blink_timer_func(void *arg) {
    // blink fast two times
    if (led_double_blinker_timer_running == false) {
        // stop blinking if asked to stop via state variable led_double_blinker_timer_running
        os_timer_disarm(&led_double_blink_timer);
        return;
    }   

    led_off();
    
    switch (led_sub_pattern_state) {
        case 0:
            led_on();

            led_sub_pattern_state++;            
            os_timer_disarm(&led_sub_pattern_timer);
            os_timer_setfn(&led_sub_pattern_timer, (os_timer_func_t *)led_double_blink_timer_func, NULL);
            os_timer_arm(&led_sub_pattern_timer, 100, 0);
            break;
        case 1:
            led_off();

            led_sub_pattern_state++;
            os_timer_disarm(&led_sub_pattern_timer);
            os_timer_setfn(&led_sub_pattern_timer, (os_timer_func_t *)led_double_blink_timer_func, NULL);
            os_timer_arm(&led_sub_pattern_timer, 100, 0);
            break;
        case 2:
            led_on();

            led_sub_pattern_state++;
            os_timer_disarm(&led_sub_pattern_timer);
            os_timer_setfn(&led_sub_pattern_timer, (os_timer_func_t *)led_double_blink_timer_func, NULL);
            os_timer_arm(&led_sub_pattern_timer, 100, 0);
            break;
        case 3:
            led_off();

            os_timer_disarm(&led_sub_pattern_timer);
            led_sub_pattern_state = 0;
            break;
    }
}

ICACHE_FLASH_ATTR void led_init(void) {
    //Set GPIO2 to output mode
    PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO2_U, FUNC_GPIO2);
    
    // Set GPIO2 to HIGH (turn blue led off)
    gpio_output_set(BIT2, 0, BIT2, 0);
}

ICACHE_FLASH_ATTR void led_on(void) {
    //Set GPIO2 to LOW
    gpio_output_set(0, BIT2, BIT2, 0);
}

ICACHE_FLASH_ATTR void led_off(void) {
    
    // Set GPIO2 to HIGH
    gpio_output_set(BIT2, 0, BIT2, 0);
}

ICACHE_FLASH_ATTR void led_blink(void) {
    led_on();
    os_timer_disarm(&led_single_blink_off_timer);
    os_timer_setfn(&led_single_blink_off_timer, (os_timer_func_t *)led_single_blink_off_timer_func, NULL);
    os_timer_arm(&led_single_blink_off_timer, 1000, 0);
}

ICACHE_FLASH_ATTR void led_pattern_a(void) {
    os_timer_disarm(&led_blinker_timer);
    os_timer_setfn(&led_blinker_timer, (os_timer_func_t *)led_blinker_timer_func, NULL);
    led_blinker_timer_running = true;   // state variable to control stopping after pattern is done
    os_timer_arm(&led_blinker_timer, 1000, 1);
}

ICACHE_FLASH_ATTR void led_pattern_b(void) {
    os_timer_disarm(&led_blinker_timer);
    os_timer_setfn(&led_blinker_timer, (os_timer_func_t *)led_blinker_timer_func, NULL);
    led_blinker_timer_running = true;   // state variable to control stopping after pattern is done
    os_timer_arm(&led_blinker_timer, 200, 1);
}

ICACHE_FLASH_ATTR void led_pattern_c(void) {
    // blink fast two times every 5th second
    os_timer_disarm(&led_double_blink_timer);
    os_timer_setfn(&led_double_blink_timer, (os_timer_func_t *)led_double_blink_timer_func, NULL);
    led_double_blinker_timer_running = true;    // state variable to control stopping after pattern is done
    os_timer_arm(&led_double_blink_timer, 3000, 1);
}

ICACHE_FLASH_ATTR void led_stop_pattern(void) {
    led_blinker_timer_running = false;
    led_double_blinker_timer_running = false;
    led_off();
}