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Diff: mbed/PortIn.h
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- 0:ad97421fb1fb
diff -r 000000000000 -r ad97421fb1fb mbed/PortIn.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed/PortIn.h Wed Apr 13 22:04:54 2016 +0000 @@ -0,0 +1,86 @@ +/* mbed Microcontroller Library - PortInOut + * Copyright (c) 2006-2011 ARM Limited. All rights reserved. + */ + +#ifndef MBED_PORTIN_H +#define MBED_PORTIN_H + +#include "device.h" + +#if DEVICE_PORTIN + +#include "PortNames.h" +#include "PinNames.h" + +namespace mbed { + +/* Class: PortIn + * A multiple pin digital input + * + * Example: + * > // 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; + * > } + * > } + * > } + */ +class PortIn { +public: + + /* Constructor: PortIn + * Create an PortIn, connected to the specified port + * + * Variables: + * port - Port to connect to (Port0-Port5) + * mask - A bitmask to identify which bits in the port should be included (0 - ignore) + */ + PortIn(PortName port, int mask = 0xFFFFFFFF); + + /* Function: read + * Read the value currently output on the port + * + * Variables: + * returns - An integer with each bit corresponding to associated port pin setting + */ + int read(); + + /* Function: mode + * Set the input pin mode + * + * Variables: + * mode - PullUp, PullDown, PullNone, OpenDrain + */ + void mode(PinMode mode); + + /* Function: operator int() + * A shorthand for <read> + */ + operator int() { + return read(); + } + +private: +#if defined(TARGET_LPC1768) || defined(TARGET_LPC2368) + LPC_GPIO_TypeDef *_gpio; +#endif + PortName _port; + uint32_t _mask; +}; + +} // namespace mbed + +#endif + +#endif