mirror of
https://gitee.com/anod/open_agb_firm.git
synced 2025-05-08 14:54:11 +08:00
88 lines
1.9 KiB
C
88 lines
1.9 KiB
C
/*
|
|
* This file is part of open_agb_firm
|
|
* Copyright (C) 2021 derrek, profi200
|
|
*
|
|
* 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 3 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, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <stdatomic.h>
|
|
#include "types.h"
|
|
#include "arm9/drivers/timer.h"
|
|
#include "arm9/drivers/interrupt.h"
|
|
#include "arm.h"
|
|
|
|
|
|
// For TIMER_sleepMs().
|
|
static u32 g_overflows;
|
|
|
|
|
|
|
|
static void timerSleepHandler(UNUSED u32 id);
|
|
|
|
void TIMER_init(void)
|
|
{
|
|
for(u32 i = 0; i < 4; i++)
|
|
{
|
|
getTimerRegs(i)->cnt = 0;
|
|
}
|
|
|
|
IRQ_registerIsr(IRQ_TIMER_3, timerSleepHandler);
|
|
}
|
|
|
|
void TIMER_start(u8 tmr, u16 ticks, u8 params)
|
|
{
|
|
Timer *const timer = getTimerRegs(tmr);
|
|
timer->val = ticks;
|
|
timer->cnt = TIMER_EN | params;
|
|
}
|
|
|
|
u16 TIMER_getTicks(u8 tmr)
|
|
{
|
|
return getTimerRegs(tmr)->val;
|
|
}
|
|
|
|
u16 TIMER_stop(u8 tmr)
|
|
{
|
|
Timer *const timer = getTimerRegs(tmr);
|
|
timer->cnt = 0;
|
|
|
|
return timer->val;
|
|
}
|
|
|
|
void TIMER_sleepMs(u32 ms)
|
|
{
|
|
Timer *const timer = getTimerRegs(3);
|
|
timer->val = TIMER_FREQ_64(1000);
|
|
g_overflows = ms;
|
|
atomic_signal_fence(memory_order_release); // Don't move the write to g_overflows.
|
|
|
|
timer->cnt = TIMER_EN | TIMER_IRQ_EN | TIMER_PRESC_64;
|
|
|
|
do
|
|
{
|
|
__wfi();
|
|
} while(timer->cnt & TIMER_EN);
|
|
}
|
|
|
|
static void timerSleepHandler(UNUSED u32 id)
|
|
{
|
|
u32 tmp = g_overflows;
|
|
if(--tmp == 0)
|
|
{
|
|
getTimerRegs(3)->cnt = 0;
|
|
return;
|
|
}
|
|
g_overflows = tmp;
|
|
}
|