64 lines
1.4 KiB
C
64 lines
1.4 KiB
C
/*
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* Copyright (c) 2006-2018, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2009-01-05 Bernard first implementation
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* 2014-06-20 xiaonong ported to LPC43xx
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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 "drv_uart.h"
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/** M0 does not have SysTick so we have to use RIT timer for it... */
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void RIT_OR_WWDT_IRQHandler(void)
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{
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/* enter interrupt */
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rt_interrupt_enter();
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if (LPC_RITIMER->CTRL & 0x01)
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{
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rt_tick_increase();
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LPC_RITIMER->CTRL |= 0x01;
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}
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/* leave interrupt */
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rt_interrupt_leave();
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}
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extern void SystemCoreClockUpdate(void);
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/**
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* This function will initial LPC43xx board.
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*/
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void rt_hw_board_init()
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{
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SystemCoreClockUpdate();
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/* Setup RIT timer. */
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LPC_RITIMER->MASK = 0;
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LPC_RITIMER->COMPVAL = SystemCoreClock / RT_TICK_PER_SECOND;
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/* Enable auto-clear. */
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LPC_RITIMER->CTRL |= 1 << 1;
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/* Reset the counter as the counter is enabled after reset. */
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LPC_RITIMER->COUNTER = 0;
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NVIC_SetPriority(M0_RITIMER_OR_WWDT_IRQn, (1 << __NVIC_PRIO_BITS) - 1);
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NVIC_EnableIRQ(M0_RITIMER_OR_WWDT_IRQn);
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/* set pend exception priority */
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NVIC_SetPriority(PendSV_IRQn, (1 << __NVIC_PRIO_BITS) - 1);
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/* init uart device */
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rt_hw_uart_init();
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/* setup the console device */
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rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
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}
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