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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2009-01-05 Bernard first implementation
* 2014-06-20 xiaonong ported to LPC43xx
*/
#include <rthw.h>
#include <rtthread.h>
#include "board.h"
#include "drv_uart.h"
/** M0 does not have SysTick so we have to use RIT timer for it... */
void RIT_OR_WWDT_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
if (LPC_RITIMER->CTRL & 0x01)
{
rt_tick_increase();
LPC_RITIMER->CTRL |= 0x01;
}
/* leave interrupt */
rt_interrupt_leave();
}
extern void SystemCoreClockUpdate(void);
/**
* This function will initial LPC43xx board.
*/
void rt_hw_board_init()
{
SystemCoreClockUpdate();
/* Setup RIT timer. */
LPC_RITIMER->MASK = 0;
LPC_RITIMER->COMPVAL = SystemCoreClock / RT_TICK_PER_SECOND;
/* Enable auto-clear. */
LPC_RITIMER->CTRL |= 1 << 1;
/* Reset the counter as the counter is enabled after reset. */
LPC_RITIMER->COUNTER = 0;
NVIC_SetPriority(M0_RITIMER_OR_WWDT_IRQn, (1 << __NVIC_PRIO_BITS) - 1);
NVIC_EnableIRQ(M0_RITIMER_OR_WWDT_IRQn);
/* set pend exception priority */
NVIC_SetPriority(PendSV_IRQn, (1 << __NVIC_PRIO_BITS) - 1);
/* init uart device */
rt_hw_uart_init();
/* setup the console device */
rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
}
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