97 lines
1.8 KiB
C
97 lines
1.8 KiB
C
/*
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* File : board.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2009 - 2011 RT-Thread Develop Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rt-thread.org/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2011-02-24 Bernard first implementation
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*/
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#include <rthw.h>
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#include <rtthread.h>
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#include "board.h"
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#include "serial.h"
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/**
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* @addtogroup FM3
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*/
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/*@{*/
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/**
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* This is the timer interrupt service routine.
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*
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*/
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void SysTick_Handler(void)
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{
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/* enter interrupt */
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rt_interrupt_enter();
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rt_tick_increase();
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/* leave interrupt */
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rt_interrupt_leave();
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}
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/**
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* This fucntion returns milliseconds since system passed
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*/
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rt_uint32_t rt_hw_tick_get_millisecond(void)
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{
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rt_tick_t tick;
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rt_uint32_t value;
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#define TICK_MS (1000/RT_TICK_PER_SECOND)
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tick = rt_tick_get();
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value = tick * TICK_MS + (SysTick->LOAD - SysTick->VAL) * TICK_MS / SysTick->LOAD;
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return value;
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}
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/**
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* This fucntion returns microseconds since system passed
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*/
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rt_uint32_t rt_hw_tick_get_microsecond(void)
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{
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rt_tick_t tick;
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rt_uint32_t value;
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#define TICK_US (1000000/RT_TICK_PER_SECOND)
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tick = rt_tick_get();
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value = tick * TICK_US + (SysTick->LOAD - SysTick->VAL) * TICK_US / SysTick->LOAD;
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return value;
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}
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/**
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* This function will initial FM3 Easy Kit board.
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*/
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void rt_hw_board_init(void)
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{
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/* disable all analog input. */
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FM3_GPIO->ADE = 0;
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/* init systick */
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SysTick_Config(SystemCoreClock/RT_TICK_PER_SECOND);
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/* initialize UART device */
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rt_hw_serial_init();
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/* set console as UART device */
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rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
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#ifdef RT_USING_COMPONENTS_INIT
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rt_components_board_init();
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#endif
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}
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/*@}*/
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