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81 lines
1.9 KiB
C
81 lines
1.9 KiB
C
/*
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* This file is part of open_agb_firm
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* Copyright (C) 2021 derrek, profi200
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "types.h"
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#include "arm11/drivers/timer.h"
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#include "arm11/drivers/interrupt.h"
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#include "fb_assert.h"
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#include "arm.h"
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void TIMER_init(void)
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{
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// Timer.
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Timer *const timer = getTimerRegs();
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timer->cnt = 0;
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timer->int_stat = 1;
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// Watchdog.
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timer->wd_cnt = 0;
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timer->wd_disable = WD_DISABLE_MAGIC1;
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timer->wd_disable = WD_DISABLE_MAGIC2;
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timer->wd_int_stat = 1;
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IRQ_registerIsr(IRQ_WATCHDOG, 12, 0, NULL);
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}
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void TIMER_start(u16 prescaler, u32 ticks, u8 params)
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{
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fb_assert(prescaler > 0 && prescaler <= 256);
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Timer *const timer = getTimerRegs();
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timer->load = ticks;
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timer->cnt = (prescaler - 1)<<TIMER_PRESC_SHIFT |
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params | TIMER_EN;
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}
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u32 TIMER_getTicks(void)
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{
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return getTimerRegs()->counter;
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}
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u32 TIMER_stop(void)
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{
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Timer *const timer = getTimerRegs();
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timer->cnt = 0;
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timer->int_stat = 1;
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return timer->counter;
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}
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void TIMER_sleepTicks(u32 ticks)
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{
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Timer *const timer = getTimerRegs();
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timer->wd_load = ticks;
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timer->wd_cnt = 0u<<TIMER_PRESC_SHIFT | WD_TIMER_MODE | // Prescaler 1.
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TIMER_IRQ_EN | TIMER_SINGLE_SHOT | TIMER_EN;
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do
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{
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__wfi();
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} while(timer->wd_counter); // Checking the cnt enable bit is broken.
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timer->wd_int_stat = 1;
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}
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