/*
 *  spreadspace rppico utils
 *
 *
 *  Copyright (C) 2013-2018 Christian Pointner <equinox@spreadspace.org>
 *
 *  This file is part of spreadspace rppico utils.
 *
 *  spreadspace rppico utils is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  any later version.
 *
 *  spreadspace rppico utils is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with spreadspace rppico utils. If not, see <http://www.gnu.org/licenses/>.
 */

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

const uint LED_PIN = PICO_DEFAULT_LED_PIN;

void handle_cmd(uint8_t cmd)
{
  switch(cmd) {
  case '0': gpio_put(LED_PIN, 0); break;
  case '1': gpio_put(LED_PIN, 1); break;
  case 't': gpio_xor_mask(1<<LED_PIN); break;
  default: printf("error\n"); return;
  }
  printf("ok\n");
}

int main()
{
  gpio_init(LED_PIN);
  gpio_set_dir(LED_PIN, GPIO_OUT);
  stdio_usb_init();
  stdio_set_translate_crlf(&stdio_usb, true);

  for(;;) {
    if(stdio_usb_connected()) {
      int cmd = getchar_timeout_us(100000);
      if(cmd != PICO_ERROR_TIMEOUT) {
        handle_cmd(cmd);
      }
    }
  }
}