mirror of
https://github.com/mytechnotalent/Embedded-Hacking.git
synced 2026-05-17 21:44:45 +02:00
Kevin Thomas
64 lines
2.1 KiB
C
64 lines
2.1 KiB
C
/**
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* @file rp2350_timer.h
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* @brief TIMER0 alarm driver header for RP2350.
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* @author Kevin Thomas
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* @date 2026
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*
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* Bare-metal TIMER0 driver providing a repeating alarm
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* interrupt on alarm 0. The tick generator is configured
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* for 1 us resolution from the 12 MHz CLK_REF.
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*
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* MIT License
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*
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* Copyright (c) 2026 Kevin Thomas
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef __RP2350_TIMER_H
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#define __RP2350_TIMER_H
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#include "rp2350.h"
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/**
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* @brief Callback type for repeating timer alarm.
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*/
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typedef void (*timer_callback_t)(void);
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/**
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* @brief Release TIMER0 from reset and wait until ready.
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* @retval None
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*/
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void timer_release_reset(void);
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/**
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* @brief Start the TIMER0 tick generator at 1 us resolution.
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* @retval None
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*/
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void timer_tick_init(void);
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/**
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* @brief Start a repeating alarm that fires every period_ms milliseconds.
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* @param period_ms interval in milliseconds between callbacks
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* @param cb function to call on each alarm
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* @retval None
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*/
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void timer_alarm_start(uint32_t period_ms, timer_callback_t cb);
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#endif /* __RP2350_TIMER_H */
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