103 lines
1.7 KiB
C
103 lines
1.7 KiB
C
/*
|
|
* 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);
|
|
}
|
|
|
|
/*@}*/
|