fixed drive strength
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Diff: drivers/PortIn.h
- Revision:
- 149:156823d33999
- Child:
- 160:d5399cc887bb
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/drivers/PortIn.h Fri Oct 28 11:17:30 2016 +0100 @@ -0,0 +1,104 @@ +/* mbed Microcontroller Library + * Copyright (c) 2006-2013 ARM Limited + * + * 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_PORTIN_H +#define MBED_PORTIN_H + +#include "platform/platform.h" + +#if DEVICE_PORTIN + +#include "hal/port_api.h" +#include "platform/critical.h" + +namespace mbed { +/** \addtogroup drivers */ +/** @{*/ + +/** A multiple pin digital input + * + * @Note Synchronization level: Interrupt safe + * + * Example: + * @code + * // Switch on an LED if any of mbed pins 21-26 is high + * + * #include "mbed.h" + * + * PortIn p(Port2, 0x0000003F); // p21-p26 + * DigitalOut ind(LED4); + * + * int main() { + * while(1) { + * int pins = p.read(); + * if(pins) { + * ind = 1; + * } else { + * ind = 0; + * } + * } + * } + * @endcode + */ +class PortIn { +public: + + /** Create an PortIn, connected to the specified port + * + * @param port Port to connect to (Port0-Port5) + * @param mask A bitmask to identify which bits in the port should be included (0 - ignore) + */ + PortIn(PortName port, int mask = 0xFFFFFFFF) { + core_util_critical_section_enter(); + port_init(&_port, port, mask, PIN_INPUT); + core_util_critical_section_exit(); + } + + /** Read the value currently output on the port + * + * @returns + * An integer with each bit corresponding to associated port pin setting + */ + int read() { + return port_read(&_port); + } + + /** Set the input pin mode + * + * @param mode PullUp, PullDown, PullNone, OpenDrain + */ + void mode(PinMode mode) { + core_util_critical_section_enter(); + port_mode(&_port, mode); + core_util_critical_section_exit(); + } + + /** A shorthand for read() + */ + operator int() { + return read(); + } + +private: + port_t _port; +}; + +} // namespace mbed + +#endif + +#endif + +/** @}*/