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67 lines
1.9 KiB
C
67 lines
1.9 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 board_spark-core
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* @{
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*
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* @file board.c
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* @brief Board specific implementations for the spark-core board
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*
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* @author Christian Mehlis <mehlis@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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#include "cpu.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 CPU */
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cpu_init();
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/* initialize the boards LEDs */
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leds_init();
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/* disable systick interrupt, set by the spark bootloader */
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SysTick->CTRL = 0;
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/* signal to spark bootloader: do not enable IWDG! set Stop Mode Flag! */
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BKP->DR9 = 0xAFFF;
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/* configure the RIOT vector table location to internal flash + spark bootloader offset */
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SCB->VTOR = LOCATION_VTABLE;
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}
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/**
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* @brief Initialize the boards on-board LEDs
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*
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* The LEDs initialization is hard-coded in this function. As the LED is soldered
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* onto the board it is fixed to its CPU pins.
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*
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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 A */
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RCC->APB2ENR |= RCC_APB2ENR_IOPAEN;
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/* reset pins */
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LED_PORT->CRH &= ~(0xf << (4*(LED_RED_PIN - 8)) |
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0xf << (4*(LED_GREEN_PIN - 8)) |
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0xf << (4*(LED_BLUE_PIN - 8)) |
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0xf << (4*(LED_WHITE_PIN - 8)));
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/* set pins to out */
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LED_PORT->CRH |= (0x3 << (4*(LED_RED_PIN - 8)) |
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0x3 << (4*(LED_GREEN_PIN - 8)) |
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0x3 << (4*(LED_BLUE_PIN - 8)) |
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0x3 << (4*(LED_WHITE_PIN - 8)));
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LED_PORT->BSRR = (1 << LED_RED_PIN) | (1 << LED_GREEN_PIN) | (1 << LED_BLUE_PIN) | (1 << LED_WHITE_PIN);
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}
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