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64 lines
1.5 KiB
C
64 lines
1.5 KiB
C
/*
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* Copyright (C) 2014 Freie Universität Berlin
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*
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* This file is subject to the terms and conditions of the GNU Lesser General
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* Public License v2.1. See the file LICENSE in the top level directory for more
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* details.
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*/
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/**
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* @ingroup boards_f4vi1
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* @{
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*
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* @file
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* @brief Board specific implementations for the f4vi1 board
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*
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* @author Stefan Pfeiffer <pfeiffer@inf.fu-berlin.de>
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* @author Hauke Petersen <hauke.petersen@fu-berlin.de>
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*
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* @}
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*/
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#include "board.h"
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static void leds_init(void);
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void board_init(void)
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{
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/* initialize the boards LEDs, this is done first for debugging purposes */
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leds_init();
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/* initialize the CPU */
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cpu_init();
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}
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/**
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* @brief Initialize the boards on-board LEDs (LD4,LD5 and LD6)
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*
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* The LED initialization is hard-coded in this function. As the LEDs are soldered
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* onto the board they are fixed to their CPU pins.
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*
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* The LEDs are connected to the following pins:
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* - LD4: PA 1
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* - LD5: PA 3
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* - LD6: PA 2
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*/
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static void leds_init(void)
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{
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/* enable clock for port GPIOD */
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RCC->AHB1ENR |= RCC_AHB1ENR_GPIOAEN;
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/* configure pins as general outputs */
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LED_PORT->MODER &= ~(0x000000FC);
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LED_PORT->MODER |= 0x00000054;
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/* set output speed high-speed */
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LED_PORT->OSPEEDR |= 0x000000FC;
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/* set output type to push-pull */
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LED_PORT->OTYPER &= ~(0x000E);
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/* disable pull resistors */
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LED_PORT->PUPDR &= ~(0x000000FC);
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/* turn all LEDs off */
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LED_PORT->BSRRL = 0x00E;
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}
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