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129 lines
3.5 KiB
C
129 lines
3.5 KiB
C
#pragma once
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/*
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* This file is part of libn3ds
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* Copyright (C) 2024 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 "mem_map.h"
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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#define TIMER_REGS_BASE (MPCORE_PRIV_BASE + 0x600)
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typedef struct
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{
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vu32 load; // 0x00
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vu32 counter; // 0x04
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vu32 cnt; // 0x08
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vu32 int_stat; // 0x0C
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u8 _0x10[0x10];
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vu32 wd_load; // 0x20
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vu32 wd_counter; // 0x24
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vu32 wd_cnt; // 0x28
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vu32 wd_int_stat; // 0x2C
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vu32 wd_reset_stat; // 0x30
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vu32 wd_disable; // 0x34
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} Timer;
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static_assert(offsetof(Timer, wd_disable) == 0x34, "Error: Member wd_disable of Timer is not at offset 0x34!");
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ALWAYS_INLINE Timer* getTimerRegs(void)
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{
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return (Timer*)TIMER_REGS_BASE;
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}
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// REG_TIMER_CNT/REG_WD_CNT
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#define TIMER_EN BIT(0)
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#define TIMER_SINGLE_SHOT (0u)
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#define TIMER_AUTO_RELOAD BIT(1)
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#define TIMER_IRQ_EN BIT(2)
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#define WD_TIMER_MODE (0u) // Watchdog only. Watchdog in timer mode.
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#define WD_WD_MODE BIT(3) // Watchdog only. Watchdog in watchdog mode.
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#define TIMER_PRESC_SHIFT (8u) // Shift helper for the prescalers.
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// REG_WD_DISABLE
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#define WD_DISABLE_MAGIC1 (0x12345678u)
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#define WD_DISABLE_MAGIC2 (0x87654321u)
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#define TIMER_BASE_FREQ (268111856u / 2)
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// p is the prescaler value and n the frequency.
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// Note: With highest prescaler and sub-microsecond frequency
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// this may give wrong results due to overflows.
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#define TIMER_FREQ(p, f) (TIMER_BASE_FREQ / ((p) * (f)))
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/**
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* @brief Resets/initializes the timer hardware. For libn3ds internal usage only.
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*/
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void TIMER_init(void);
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/**
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* @brief Starts the timer.
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*
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* @param[in] prescaler The prescaler (1-256).
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* @param[in] ticks The initial number of ticks. This is also the reload
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* value in auto reload mode.
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* @param[in] params The parameters. See /regs/timer.h "REG_TIMER_CNT" defines.
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*/
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void TIMER_start(const u16 prescaler, const u32 ticks, const u8 params);
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/**
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* @brief Returns the current number of ticks of the timer.
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*
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* @return The number of ticks.
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*/
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u32 TIMER_getTicks(void);
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/**
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* @brief Stops the timer and returns the current number of ticks.
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*
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* @return The number of ticks.
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*/
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u32 TIMER_stop(void);
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/**
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* @brief Halts the CPU for ms amount of milliseconds.
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*
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* @param[in] ms Number of milliseconds to sleep. Up to 32038.
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*/
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void TIMER_sleepMs(const u32 ms);
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/**
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* @brief Halts the CPU for us amount of microseconds.
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*
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* @param[in] us Number of microseconds to sleep. Up to 32038622.
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*/
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void TIMER_sleepUs(const u32 us);
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/**
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* @brief Halts the CPU for ns amount of nanoseconds.
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*
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* @param[in] ns Number of nanoseconds to sleep. Up to 32038622678.
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*/
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void TIMER_sleepNs(const u64 ns);
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#ifdef __cplusplus
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} // extern "C"
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#endif |