108 lines
3.5 KiB
C++
108 lines
3.5 KiB
C++
/*
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Ticker.h - esp32 library that calls functions periodically
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Copyright (c) 2017 Bert Melis. All rights reserved.
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Based on the original work of:
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Copyright (c) 2014 Ivan Grokhotkov. All rights reserved.
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The original version is part of the esp8266 core for Arduino environment.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef TICKER_H
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#define TICKER_H
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extern "C" {
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#include "esp_timer.h"
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}
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class Ticker
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{
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public:
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Ticker();
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~Ticker();
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typedef void (*callback_t)(void);
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typedef void (*callback_with_arg_t)(void*);
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void attach(float seconds, callback_t callback)
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{
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_attach_ms(seconds * 1000, true, reinterpret_cast<callback_with_arg_t>(callback), 0);
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}
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void attach_ms(uint32_t milliseconds, callback_t callback)
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{
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_attach_ms(milliseconds, true, reinterpret_cast<callback_with_arg_t>(callback), 0);
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}
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template<typename TArg>
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void attach(float seconds, void (*callback)(TArg), TArg arg)
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{
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static_assert(sizeof(TArg) <= sizeof(uint32_t), "attach() callback argument size must be <= 4 bytes");
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// C-cast serves two purposes:
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// static_cast for smaller integer types,
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// reinterpret_cast + const_cast for pointer types
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uint32_t arg32 = (uint32_t)arg;
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_attach_ms(seconds * 1000, true, reinterpret_cast<callback_with_arg_t>(callback), arg32);
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}
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template<typename TArg>
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void attach_ms(uint32_t milliseconds, void (*callback)(TArg), TArg arg)
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{
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static_assert(sizeof(TArg) <= sizeof(uint32_t), "attach_ms() callback argument size must be <= 4 bytes");
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uint32_t arg32 = (uint32_t)arg;
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_attach_ms(milliseconds, true, reinterpret_cast<callback_with_arg_t>(callback), arg32);
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}
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void once(float seconds, callback_t callback)
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{
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_attach_ms(seconds * 1000, false, reinterpret_cast<callback_with_arg_t>(callback), 0);
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}
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void once_ms(uint32_t milliseconds, callback_t callback)
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{
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_attach_ms(milliseconds, false, reinterpret_cast<callback_with_arg_t>(callback), 0);
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}
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template<typename TArg>
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void once(float seconds, void (*callback)(TArg), TArg arg)
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{
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static_assert(sizeof(TArg) <= sizeof(uint32_t), "attach() callback argument size must be <= 4 bytes");
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uint32_t arg32 = (uint32_t)(arg);
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_attach_ms(seconds * 1000, false, reinterpret_cast<callback_with_arg_t>(callback), arg32);
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}
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template<typename TArg>
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void once_ms(uint32_t milliseconds, void (*callback)(TArg), TArg arg)
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{
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static_assert(sizeof(TArg) <= sizeof(uint32_t), "attach_ms() callback argument size must be <= 4 bytes");
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uint32_t arg32 = (uint32_t)(arg);
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_attach_ms(milliseconds, false, reinterpret_cast<callback_with_arg_t>(callback), arg32);
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}
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void detach();
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bool active();
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protected:
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void _attach_ms(uint32_t milliseconds, bool repeat, callback_with_arg_t callback, uint32_t arg);
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protected:
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esp_timer_handle_t _timer;
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};
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#endif // TICKER_H
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