107 lines
1.9 KiB
C
107 lines
1.9 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) 2006, 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://openlab.rt-thread.com/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2006-08-23 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 "lpc214x.h"
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#include "board.h"
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/**
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* @addtogroup LPC2148
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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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* @param vector the irq number for timer
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*/
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void rt_hw_timer_handler(int vector)
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{
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rt_tick_increase();
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/* clear interrupt flag */
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T0IR |= 0x01;
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/* acknowledge Interrupt */
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VICVectAddr = 0;
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}
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/**
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* This function is used to display a string on console, normally, it's
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* invoked by rt_kprintf
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*
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* @param str the displayed string
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*/
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void rt_hw_console_output(const char* str)
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{
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while (*str)
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{
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if (*str=='\n')
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{
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while (!(U0LSR & 0x20));
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U0THR = '\r';
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}
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while (!(U0LSR & 0x20));
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U0THR = *str;
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str ++;
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}
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}
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#define BAUD_RATE 115200
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#define U0PINS 0x05
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void rt_hw_console_init()
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{
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/* Enable RxD and TxD pins */
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PINSEL0 = U0PINS;
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/* 8 bits, no Parity, 1 Stop bit */
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U0LCR = 0x83;
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/* Setup Baudrate */
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U0DLL = (PCLK/16/BAUD_RATE) & 0xFF;
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U0DLM = ((PCLK/16/BAUD_RATE) >> 8) & 0xFF;
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/* DLAB = 0 */
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U0LCR = 0x03;
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}
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/**
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* This function will initial sam7x256 board.
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*/
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void rt_hw_board_init()
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{
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/* console init */
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rt_hw_console_init();
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/* prescaler = 0*/
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T0PR = 0;
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T0PC = 0;
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/* reset and enable MR0 interrupt */
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T0MCR = 0x3;
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T0MR0 = PCLK / RT_TICK_PER_SECOND;
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/* enable timer 0 */
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T0TCR = 1;
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/* install timer handler */
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rt_hw_interrupt_install(TIMER0_INT, rt_hw_timer_handler, RT_NULL);
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rt_hw_interrupt_umask(TIMER0_INT);
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}
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/*@}*/
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