/* gpio.c: PPM firmware general purpose input/output source code.
 * Copyright (C) 2014  Bradley Worley  <geekysuavo@gmail.com>
 *
 * This program 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
 * (at your option) any later version.
 *
 * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 */

/* include the main header. */
#include "main.h"

/* gpio_init: initialize general purpose input/output pins. */
void gpio_init (void) {
  /* disable JTAG access to the pins of PORTF. */
  MCUCR |= (1 << JTD);
  MCUCR |= (1 << JTD);

  /* initialize all PORTB GPIO to hi-z. */
  DDRB = 0;
  PORTB = 0;

  /* initialize all PORTC GPIO to hi-z. */
  DDRC = 0;
  PORTC = 0;

  /* initialize all PORTD GPIO to hi-z. */
  DDRD = 0;
  PORTD = 0;

  /* initialize all PORTE GPIO to hi-z. */
  DDRE = 0;
  PORTD = 0;

  /* initialize all PORTF GPIO to hi-z. */
  DDRF = 0;
  PORTF = 0;

  /* initialize the spi analog-to-digital converter. */
  gpio_adc_init ();

  /* initialize the spi digital-to-analog converter. */
  gpio_dac_init ();

  /* initialize the spi tuning switch bank. */
  gpio_tune_init ();

  /* initialize the polarization current sink. */
  gpio_ccs_init ();

  /* initialize the relay. */
  gpio_relay_init ();

  /* initialize the analog signal chain regulator. */
  gpio_asc_init ();

  /* initialize the led indicators. */
  gpio_leds_init ();

  /* signal that general purpose i/o has initialized by turning on all
   * indicator leds.
   */
  gpio_led_comm_on ();
  gpio_led_adc_on ();
  gpio_led_dac_on ();
}