board.c

RT-Thread是发展中的下一代微内核嵌入式实时操作系统

/*
 * File      : board.c
 * This file is part of RT-Thread RTOS
 * COPYRIGHT (C) 2006, RT-Thread Develop Team
 *
 * The license and distribution terms for this file may be
 * found in the file LICENSE in this distribution or at
 * http://openlab.rt-thread.com/license/LICENSE.
 *
 * Change Logs:
 * Date           Author       Notes
 * 2006-10-25     Bernard      first implementation
 */

#include <rtthread.h>
#include <rthw.h>

#include <pxa270.h>
#include "board.h"

#define HZ 100
#define CLOCK_TICK_RATE 3249600
#define LATCH  ((CLOCK_TICK_RATE + HZ/2) / HZ)	/* For divider */

/**
 * @addtogroup PXA270
 */
/*@{*/

void rt_timer_handler(int vector)
{
	int next_match;
	
	do {
		rt_tick_increase();
		PXA2X0_OST_OSSR = 0x01;  /* Clear match on timer 0 */
		next_match = (PXA2X0_OST_OSMR0 += LATCH);
	} 
	while( (signed long)(next_match - PXA2X0_OST_OSCR0) <= 8 );
}

extern volatile rt_uint8 _rt_hw_framebuffer[];
extern unsigned char asc16_font[];

/**
 * @brief init zaurus c1000
 *
 * This function will init zaurus c1000
 */
void rt_hw_board_init()
{
	/* int OS Timer */
	PXA2X0_OST_OIER = 0;		/* disable any timer interrupts */
	PXA2X0_OST_OSCR0= LATCH*2;	/* push OSCR out of the way */
	PXA2X0_OST_OSMR0= LATCH;	/* set initial match */
	PXA2X0_OST_OSSR = 0xf;		/* clear status on all timers */

	PXA2X0_OST_OSSR = 0x3f;		/* clear all OS Timer status */
	PXA2X0_OST_OIER = 0x10;		/* enable OSMR4 interrupt */
	
	/* install interrupt handler */
	rt_hw_interrupt_install(PXA2X0_INT_OST0, rt_timer_handler, RT_NULL);
	rt_hw_interrupt_umask(PXA2X0_INT_OST0);
	
	PXA2X0_OST_OIER = 0x01;		/* enable match on timer 0 to cause interrupts */
	PXA2X0_OST_OSCR0= 0;		/* initialize free-running timer */
	
	rt_hw_kbd_init();
	rt_hw_gpio_init();
	rt_hw_lcd_init();
	rt_hw_lcd_update();
	
	rt_console_init(&_rt_hw_framebuffer[0], &asc16_font[0], 2);
	rt_console_clear();
}

#define C1K_SCOOP_BASE 0x10800000
#define GPIOWP	0x24

/** 
 * @param on, which led is operated, green or orange
 */
void rt_hw_led_set(rt_uint32 enable)
{
	volatile unsigned short *p;

	p = (unsigned short*) (C1K_SCOOP_BASE + GPIOWP);
	if (enable)
	{
		*p = *p | (1 << 1);
	}
	else
	{
		*p = *p & (~(1 << 1));
	}
}

void rt_hw_led_flash(void)
{
	int i;
	static int count = 0;
	
	rt_hw_led_set(1);
	for ( i = 0; i < 1000000; i++);
	rt_hw_led_set(0);
	for ( i = 0; i < 1000000; i++);
}

#ifdef RT_USING_FINSH
extern void finsh_notify(void);
void rt_serial_isr(int vector)
{
	finsh_notify();
}

void rt_hw_finsh_init()
{
	/* install keyboard isr */
}

#endif

/*@}*/