rt-thread/bsp/nios_ii/board.c

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2013-01-08 22:40:58 +08:00
/*
* Copyright (c) 2006-2021, RT-Thread Development Team
2013-01-08 22:40:58 +08:00
*
* SPDX-License-Identifier: Apache-2.0
2013-01-08 22:40:58 +08:00
*
* Change Logs:
* Date Author Notes
* 2011-02-14 aozima first implementation for Nios II.
*/
#include <rthw.h>
#include <rtthread.h>
#include <stdio.h>
#include "system.h"
#include "sys/alt_irq.h"
#include "altera_avalon_timer_regs.h"
#include "uart.h"
extern int alt_irq_register (alt_u32 id,
void* context,
void (*alt_isr_func)(void* isr_context, alt_u32 id) );
/**
* @addtogroup NIOS_II
*/
/*@{*/
/**
* This is the timer interrupt service routine.
*
*/
void rt_hw_timer_handler(void * context,unsigned long id)
{
void* base = (void*)TIMER_BASE;
/* clear the interrupt */
IOWR_ALTERA_AVALON_TIMER_STATUS (base, 0);
/* enter interrupt */
rt_interrupt_enter();
rt_tick_increase();
/* leave interrupt */
rt_interrupt_leave();
}
void sysTick_config(void)
{
void* base = (void*)TIMER_BASE;
IOWR_ALTERA_AVALON_TIMER_CONTROL (base,
ALTERA_AVALON_TIMER_CONTROL_ITO_MSK |
ALTERA_AVALON_TIMER_CONTROL_CONT_MSK |
ALTERA_AVALON_TIMER_CONTROL_START_MSK);
alt_irq_register (TIMER_IRQ, NULL, rt_hw_timer_handler);
}
static void rt_hw_show_info(void)
{
rt_kprintf("\r\n\r\n---------- board info ----------\r\n");
rt_kprintf("ALT_DEVICE_FAMILY: %s\r\n",ALT_DEVICE_FAMILY);
rt_kprintf("ALT_CPU_ARCHITECTURE: %s\r\n",ALT_CPU_ARCHITECTURE);
rt_kprintf("ALT_CPU_CPU_FREQ: %uMHz\r\n",ALT_CPU_CPU_FREQ/1000000UL);
rt_kprintf("memory size: at 0x%08X 0x%08X byte\r\n",SDRAM_BASE,SDRAM_SPAN);
}
void rt_hw_board_init(void)
{
rt_hw_uart_init();
rt_console_set_device("uart");
rt_hw_show_info();
sysTick_config();
}
/*@}*/