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/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2006-08-23 Bernard first implementation
*/
#include <rthw.h>
#include <rtthread.h>
#include "lpc214x.h"
#include "board.h"
/**
* @addtogroup LPC2148
*/
/*@{*/
/**
* This is the timer interrupt service routine.
* @param vector the irq number for timer
*/
void rt_hw_timer_handler(int vector, void *param)
{
rt_tick_increase();
/* clear interrupt flag */
T0IR |= 0x01;
/* acknowledge Interrupt */
VICVectAddr = 0;
}
/**
* This function is used to display a string on console, normally, it's
* invoked by rt_kprintf
*
* @param str the displayed string
*/
void rt_hw_console_output(const char* str)
{
while (*str)
{
if (*str=='\n')
{
while (!(U0LSR & 0x20));
U0THR = '\r';
}
while (!(U0LSR & 0x20));
U0THR = *str;
str ++;
}
}
#define BAUD_RATE 115200
#define U0PINS 0x05
void rt_hw_console_init()
{
/* Enable RxD and TxD pins */
PINSEL0 = U0PINS;
/* 8 bits, no Parity, 1 Stop bit */
U0LCR = 0x83;
/* Setup Baudrate */
U0DLL = (PCLK/16/BAUD_RATE) & 0xFF;
U0DLM = ((PCLK/16/BAUD_RATE) >> 8) & 0xFF;
/* DLAB = 0 */
U0LCR = 0x03;
}
/**
* This function will initial sam7x256 board.
*/
void rt_hw_board_init(void)
{
/* console init */
rt_hw_console_init();
/* prescaler = 0*/
T0PR = 0;
T0PC = 0;
/* reset and enable MR0 interrupt */
T0MCR = 0x3;
T0MR0 = PCLK / RT_TICK_PER_SECOND;
/* enable timer 0 */
T0TCR = 1;
/* install timer handler */
rt_hw_interrupt_install(TIMER0_INT, rt_hw_timer_handler, RT_NULL, "TIMER0");
rt_hw_interrupt_umask(TIMER0_INT);
}
/*@}*/
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