128 lines
3.2 KiB
C
128 lines
3.2 KiB
C
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/*
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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) 2014 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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* 2016-12-05 Pluto 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 "usart.h"
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/* RT_USING_COMPONENTS_INIT */
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#ifdef RT_USING_COMPONENTS_INIT
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#include <components.h>
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#endif
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/**
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* @addtogroup NUVOTON_M451
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*/
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/*@{*/
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/*******************************************************************************
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* Function Name : NVIC_Configuration
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* Description : Configures Vector Table base location.
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* Input : None
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* Output : None
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* Return : None
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*******************************************************************************/
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void NVIC_Configuration(void)
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{
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// NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
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}
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/**
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* @brief Inserts a delay time.
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* @param nCount: specifies the delay time length.
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* @retval None
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*/
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static void delay(__IO uint32_t nCount)
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{
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/* Decrement nCount value */
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while (nCount != 0)
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{
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nCount--;
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}
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}
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static void rt_hw_system_init(void)
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{
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/*---------------------------------------------------------------------------------------------------------*/
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/* Init System Clock */
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/*---------------------------------------------------------------------------------------------------------*/
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/* Unlock protected registers */
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SYS_UnlockReg();
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/* Enable HIRC clock (Internal RC 22.1184MHz) */
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CLK_EnableXtalRC(CLK_PWRCTL_HIRCEN_Msk);
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/* Wait for HIRC clock ready */
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CLK_WaitClockReady(CLK_STATUS_HIRCSTB_Msk);
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/* Select HCLK clock source as HIRC and and HCLK clock divider as 1 */
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CLK_SetHCLK(CLK_CLKSEL0_HCLKSEL_HIRC, CLK_CLKDIV0_HCLK(1));
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/* Enable HXT clock (external XTAL 12MHz) */
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CLK_EnableXtalRC(CLK_PWRCTL_HXTEN_Msk);
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/* Wait for HXT clock ready */
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CLK_WaitClockReady(CLK_STATUS_HXTSTB_Msk);
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/* Set core clock as PLL_CLOCK from PLL */
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CLK_SetCoreClock(BOARD_PLL_CLOCK);
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/* Set SysTick clock source to HCLK source divide 2 */
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CLK_SetSysTickClockSrc(CLK_CLKSEL0_STCLKSEL_HCLK_DIV2);
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/* Lock protected registers */
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SYS_LockReg();
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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 function will initial Nuvoton board.
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*/
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void rt_hw_board_init()
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{
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/* NVIC Configuration */
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NVIC_Configuration();
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/* Configure the system clock */
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rt_hw_system_init();
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/* Configure the SysTick */
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SysTick_Config(SystemCoreClock / RT_TICK_PER_SECOND);
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/* Initial usart deriver, and set console device */
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rt_hw_usart_init();
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#ifdef RT_USING_CONSOLE
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rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
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#endif
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/* Call components board initial (use INIT_BOARD_EXPORT()) */
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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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