mirror of
https://github.com/mytechnotalent/Embedded-Hacking.git
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Kevin Thomas
63 lines
2.0 KiB
C
63 lines
2.0 KiB
C
/**
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* @file timer.c
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* @brief Implementation of repeating timer driver
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* @author Kevin Thomas
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* @date 2025
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*
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* MIT License
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*
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* Copyright (c) 2025 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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#include "timer.h"
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#include "pico/time.h"
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static repeating_timer_t g_timer;
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static bool g_timer_active = false;
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static timer_driver_callback_t g_user_callback = NULL;
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static bool timer_shim(repeating_timer_t *rt) {
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(void)rt;
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if (g_user_callback) {
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return g_user_callback();
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}
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return false;
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}
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void timer_driver_start(int32_t period_ms, timer_driver_callback_t callback) {
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if (g_timer_active) {
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cancel_repeating_timer(&g_timer);
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g_timer_active = false;
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}
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g_user_callback = callback;
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g_timer_active = add_repeating_timer_ms(period_ms, timer_shim, NULL, &g_timer);
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}
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void timer_driver_cancel(void) {
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if (!g_timer_active) {
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return;
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}
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cancel_repeating_timer(&g_timer);
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g_timer_active = false;
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}
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