
test
Diff: mbed/drivers/AnalogIn.h
- Revision:
- 12:406f75196a12
- Parent:
- 11:32eeb052cda5
- Child:
- 13:0c732e06d675
--- a/mbed/drivers/AnalogIn.h Wed Aug 26 14:26:27 2020 +0530 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,139 +0,0 @@ -/* mbed Microcontroller Library - * Copyright (c) 2006-2013 ARM Limited - * SPDX-License-Identifier: Apache-2.0 - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -#ifndef MBED_ANALOGIN_H -#define MBED_ANALOGIN_H - -#include "platform/platform.h" - -#if DEVICE_ANALOGIN || defined(DOXYGEN_ONLY) - -#include "hal/analogin_api.h" -#include "platform/SingletonPtr.h" -#include "platform/PlatformMutex.h" - -namespace mbed { -/** \addtogroup drivers */ - -/** An analog input, used for reading the voltage on a pin - * - * @note Synchronization level: Thread safe - * - * Example: - * @code - * // Print messages when the AnalogIn is greater than 50% - * - * #include "mbed.h" - * - * AnalogIn temperature(p20); - * - * int main() { - * while(1) { - * if(temperature > 0.5) { - * printf("Too hot! (%f)", temperature.read()); - * } - * } - * } - * @endcode - * @ingroup drivers - */ -class AnalogIn { - -public: - - /** Create an AnalogIn, connected to the specified pin - * - * @param pin AnalogIn pin to connect to - */ - AnalogIn(PinName pin) - { - lock(); - analogin_init(&_adc, pin); - unlock(); - } - - /** Read the input voltage, represented as a float in the range [0.0, 1.0] - * - * @returns A floating-point value representing the current input voltage, measured as a percentage - */ - float read() - { - lock(); - float ret = analogin_read(&_adc); - unlock(); - return ret; - } - - /** Read the input voltage, represented as an unsigned short in the range [0x0, 0xFFFF] - * - * @returns - * 16-bit unsigned short representing the current input voltage, normalized to a 16-bit value - */ - unsigned short read_u16() - { - lock(); - unsigned short ret = analogin_read_u16(&_adc); - unlock(); - return ret; - } - - /** An operator shorthand for read() - * - * The float() operator can be used as a shorthand for read() to simplify common code sequences - * - * Example: - * @code - * float x = volume.read(); - * float x = volume; - * - * if(volume.read() > 0.25) { ... } - * if(volume > 0.25) { ... } - * @endcode - */ - operator float() - { - // Underlying call is thread safe - return read(); - } - - virtual ~AnalogIn() - { - // Do nothing - } - -protected: -#if !defined(DOXYGEN_ONLY) - virtual void lock() - { - _mutex->lock(); - } - - virtual void unlock() - { - _mutex->unlock(); - } - - analogin_t _adc; - static SingletonPtr<PlatformMutex> _mutex; -#endif //!defined(DOXYGEN_ONLY) -}; - -} // namespace mbed - -#endif - -#endif -