.from: http://mbed.org/projects/libraries/svn/mbed/trunk/DigitalOut.h
/* mbed Microcontroller Library - DigitalOut
* Copyright (c) 2006-2011 ARM Limited. All rights reserved.
*/
#ifndef MBED_DIGITALOUT_H
#define MBED_DIGITALOUT_H
#include "platform.h"
#include "PinNames.h"
#include "PeripheralNames.h"
#include "Base.h"
namespace mbed {
/* Class: DigitalOut
* A digital output, used for setting the state of a pin
*
* Example:
* > // Toggle a LED
* > #include "mbed.h"
* >
* > DigitalOut led(LED1);
* >
* > int main() {
* > while(1) {
* > led = !led;
* > wait(0.2);
* > }
* > }
*/
class DigitalOut : public Base {
public:
/* Constructor: DigitalOut
* Create a DigitalOut connected to the specified pin
*
* Variables:
* pin - DigitalOut pin to connect to
*/
DigitalOut(PinName pin, const char* name = NULL);
/* Function: write
* Set the output, specified as 0 or 1 (int)
*
* Variables:
* value - An integer specifying the pin output value,
* 0 for logical 0 and 1 (or any other non-zero value) for logical 1
*/
void write(int value) {
#if defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
if(value) {
_gpio->FIOSET = _mask;
} else {
_gpio->FIOCLR = _mask;
}
#elif defined(TARGET_LPC11U24)
if(value) {
LPC_GPIO->SET[_index] = _mask;
} else {
LPC_GPIO->CLR[_index] = _mask;
}
#endif
}
/* Function: read
* Return the output setting, represented as 0 or 1 (int)
*
* Variables:
* returns - An integer representing the output setting of the pin,
* 0 for logical 0 and 1 for logical 1
*/
int read() {
#if defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
return ((_gpio->FIOPIN & _mask) ? 1 : 0);
#elif defined(TARGET_LPC11U24)
return ((LPC_GPIO->PIN[_index] & _mask) ? 1 : 0);
#endif
}
#ifdef MBED_OPERATORS
/* Function: operator=
* A shorthand for <write>
*/
DigitalOut& operator= (int value) {
write(value);
return *this;
}
DigitalOut& operator= (DigitalOut& rhs) {
write(rhs.read());
return *this;
}
/* Function: operator int()
* A shorthand for <read>
*/
operator int() {
return read();
}
#endif
#ifdef MBED_RPC
virtual const struct rpc_method *get_rpc_methods();
static struct rpc_class *get_rpc_class();
#endif
protected:
PinName _pin;
#if defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
LPC_GPIO_TypeDef *_gpio;
#elif defined(TARGET_LPC11U24)
int _index;
#endif
uint32_t _mask;
};
} // namespace mbed
#endif
