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RIOT/boards/msbiot/board.c 1.45 KB
fb11e647   vrobic   reseau statique a...
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  /*
   * Copyright (C) 2014 Freie Universitรคt Berlin
   *
   * This file is subject to the terms and conditions of the GNU Lesser General
   * Public License v2.1. See the file LICENSE in the top level directory for more
   * details.
   */
  
  /**
   * @ingroup     boards_msbiot
   * @{
   *
   * @file
   * @brief       Board specific implementations for the MSB-IoT board
   *
   * @author      Fabian Nack <nack@inf.fu-berlin.de>
   *
   * @}
   */
  
  #include "board.h"
  
  static void leds_init(void);
  
  void board_init(void)
  {
      /* initialize the CPU */
      cpu_init();
  
      /* initialize the boards LEDs */
      leds_init();
  }
  
  /**
   * @brief Initialize the boards standard LEDs (RED, YELLOW, GREEN)
   *
   * The LED initialization is hard-coded in this function. As the LEDs are soldered
   * onto the board they are fixed to their CPU pins.
   *
   * The LEDs are connected to the following pins:
   * - LED RED:    PB8
   * - LED YELLOW: PB14
   * - LED GREEN:  PB15
   */
  static void leds_init(void)
  {
      /* enable clock for port GPIOB */
      periph_clk_en(AHB1, RCC_AHB1ENR_GPIOBEN);
  
      /* set output speed to 50MHz */
      LED_PORT->OSPEEDR &= ~(0xF0030000);
      LED_PORT->OSPEEDR |= 0xA0020000;
      /* set output type to push-pull */
      LED_PORT->OTYPER &= ~(0x0000C100);
      /* configure pins as general outputs */
      LED_PORT->MODER &= ~(0xF0030000);
      LED_PORT->MODER |= 0x50010000;
      /* disable pull resistors */
      LED_PORT->PUPDR &= ~(0xF0030000);
  
      /* turn all LEDs off */
      LED_PORT->BSRRL = 0xC100;
  }