110 lines
2.7 KiB
C
110 lines
2.7 KiB
C
/*
|
|
* This file is part of FH8620 BSP for RT-Thread distribution.
|
|
*
|
|
* Copyright (c) 2016 Shanghai Fullhan Microelectronics Co., Ltd.
|
|
* All rights reserved
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
* Visit http://www.fullhan.com to get contact with Fullhan.
|
|
*
|
|
* Change Logs:
|
|
* Date Author Notes
|
|
*/
|
|
|
|
#include "timer.h"
|
|
#include <rtdevice.h>
|
|
#include "fh_arch.h"
|
|
#include "libraries/inc/fh_timer.h"
|
|
//#include "fh_pmu.h"
|
|
//#include "chip_reg.h"
|
|
//NEED_CAUTION.
|
|
|
|
#define TIMER_CLOCK 1000000
|
|
|
|
#define CONFIG_PAE_PTS_CLOCK (1000000)
|
|
#define TICKS_PER_USEC (CONFIG_PAE_PTS_CLOCK / 1000000)
|
|
#define REG_PAE_PTS_REG (0xec100000 + 0x0040)
|
|
|
|
static unsigned long lastdec;
|
|
static unsigned long long timestamp;
|
|
|
|
rt_uint32_t read_pts(void)
|
|
{
|
|
return GET_REG(REG_PAE_PTS_REG);
|
|
}
|
|
|
|
unsigned long long get_ticks(void)
|
|
{
|
|
rt_uint32_t now = read_pts();
|
|
if (now >= lastdec) {
|
|
/* normal mode */
|
|
timestamp += now - lastdec;
|
|
} else {
|
|
now = read_pts();
|
|
if (now >= lastdec)
|
|
timestamp += now - lastdec;
|
|
else {
|
|
/* we have an overflow ... */
|
|
timestamp += now + 0xffffffff - lastdec;
|
|
}
|
|
}
|
|
lastdec = now;
|
|
return timestamp / (TICKS_PER_USEC * 10);
|
|
}
|
|
|
|
void udelay(unsigned long usec)
|
|
{
|
|
unsigned long long tmp;
|
|
rt_uint32_t tmo;
|
|
tmo = (usec + 9) / 10;
|
|
tmp = get_ticks() + tmo; /* get current timestamp */
|
|
|
|
while (get_ticks() < tmp)
|
|
/* loop till event */
|
|
/*NOP*/;
|
|
}
|
|
|
|
void rt_timer_handler(int vector, void *param)
|
|
{
|
|
timer *tim = param;
|
|
|
|
rt_interrupt_enter();
|
|
timer_get_eoi(tim);
|
|
rt_tick_increase();
|
|
rt_interrupt_leave();
|
|
}
|
|
|
|
/**
|
|
* This function will init pit for system ticks
|
|
*/
|
|
void rt_hw_timer_init()
|
|
{
|
|
timer *tim = (timer *) TMR_REG_BASE;
|
|
timer_init(tim);
|
|
/* install interrupt handler */
|
|
rt_hw_interrupt_install(TMR0_IRQn, rt_timer_handler, (void *) tim,
|
|
"sys_tick");
|
|
rt_hw_interrupt_umask(TMR0_IRQn);
|
|
|
|
timer_set_mode(tim, TIMER_MODE_PERIODIC);
|
|
timer_set_period(tim, RT_TICK_PER_SECOND, TIMER_CLOCK);
|
|
//timer_set_period(tim, RT_TIMER_TICK_PER_SECOND, TIMER_CLOCK);
|
|
timer_enable_irq(tim);
|
|
timer_enable(tim);
|
|
|
|
}
|
|
|