src/led.c

/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2021 a-pushkin on GitHub
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 */

#include <pico/stdlib.h>
#include <stdint.h>

#include "picoprobe_config.h"

#define LED_COUNT_SHIFT 14
#define LED_COUNT_MAX 5 * (1 << LED_COUNT_SHIFT)

static uint32_t led_count;

void led_init(void) {
    led_count = 0;
    gpio_init(PICOPROBE_LED);
    gpio_set_dir(PICOPROBE_LED, GPIO_OUT);
    gpio_put(PICOPROBE_LED, 1);
#ifdef PICOPROBE_USB_CONNECTED_LED
    gpio_init(PICOPROBE_USB_CONNECTED_LED);
    gpio_set_dir(PICOPROBE_USB_CONNECTED_LED, GPIO_OUT);
#endif
#ifdef PICOPROBE_DAP_CONNECTED_LED
    gpio_init(PICOPROBE_DAP_CONNECTED_LED);
    gpio_set_dir(PICOPROBE_DAP_CONNECTED_LED, GPIO_OUT);
#endif
#ifdef PICOPROBE_DAP_RUNNING_LED
    gpio_init(PICOPROBE_DAP_RUNNING_LED);
    gpio_set_dir(PICOPROBE_DAP_RUNNING_LED, GPIO_OUT);
#endif
#ifdef PICOPROBE_UART_RX_LED
    gpio_init(PICOPROBE_UART_RX_LED);
    gpio_set_dir(PICOPROBE_UART_RX_LED, GPIO_OUT);
#endif
#ifdef PICOPROBE_UART_TX_LED
    gpio_init(PICOPROBE_UART_TX_LED);
    gpio_set_dir(PICOPROBE_UART_TX_LED, GPIO_OUT);
#endif
}

void led_task(void) {
    if (led_count != 0) {
        --led_count;
        gpio_put(PICOPROBE_LED, !((led_count >> LED_COUNT_SHIFT) & 1));
    }
}

void led_signal_activity(uint total_bits) {
    if (led_count == 0) {
        gpio_put(PICOPROBE_LED, 0);
    }

    if (led_count < LED_COUNT_MAX) {
        led_count += total_bits;
    }
}