Jing Qiu / mbed

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Fork of mbed by gokmen ascioglu

AnalogIn.h@1:27d81db81dd7, 2015-03-03 (annotated)

Committer:
Jing_Qiu
Date:
Tue Mar 03 00:55:57 2015 +0000
Revision:
1:27d81db81dd7
Parent:
0:a8fa94490a0a 
revise

Who changed what in which revision?

UserRevisionLine numberNew contents of line
gokmenascioglu 0:a8fa94490a0a 1 /* mbed Microcontroller Library - AnalogIn
gokmenascioglu 0:a8fa94490a0a 2 * Copyright (c) 2006-2011 ARM Limited. All rights reserved.
gokmenascioglu 0:a8fa94490a0a 3 */
gokmenascioglu 0:a8fa94490a0a 4
gokmenascioglu 0:a8fa94490a0a 5 #ifndef MBED_ANALOGIN_H
gokmenascioglu 0:a8fa94490a0a 6 #define MBED_ANALOGIN_H
gokmenascioglu 0:a8fa94490a0a 7
gokmenascioglu 0:a8fa94490a0a 8 #include "device.h"
gokmenascioglu 0:a8fa94490a0a 9
gokmenascioglu 0:a8fa94490a0a 10 #if DEVICE_ANALOGIN
gokmenascioglu 0:a8fa94490a0a 11
gokmenascioglu 0:a8fa94490a0a 12 #include "platform.h"
gokmenascioglu 0:a8fa94490a0a 13 #include "PinNames.h"
gokmenascioglu 0:a8fa94490a0a 14 #include "PeripheralNames.h"
gokmenascioglu 0:a8fa94490a0a 15 #include "Base.h"
gokmenascioglu 0:a8fa94490a0a 16
gokmenascioglu 0:a8fa94490a0a 17 namespace mbed {
gokmenascioglu 0:a8fa94490a0a 18
gokmenascioglu 0:a8fa94490a0a 19 /* Class: AnalogIn
gokmenascioglu 0:a8fa94490a0a 20 * An analog input, used for reading the voltage on a pin
gokmenascioglu 0:a8fa94490a0a 21 *
gokmenascioglu 0:a8fa94490a0a 22 * Example:
gokmenascioglu 0:a8fa94490a0a 23 * > // Print messages when the AnalogIn is greater than 50%
gokmenascioglu 0:a8fa94490a0a 24 * >
gokmenascioglu 0:a8fa94490a0a 25 * > #include "mbed.h"
gokmenascioglu 0:a8fa94490a0a 26 * >
gokmenascioglu 0:a8fa94490a0a 27 * > AnalogIn temperature(p20);
gokmenascioglu 0:a8fa94490a0a 28 * >
gokmenascioglu 0:a8fa94490a0a 29 * > int main() {
gokmenascioglu 0:a8fa94490a0a 30 * > while(1) {
gokmenascioglu 0:a8fa94490a0a 31 * > if(temperature > 0.5) {
gokmenascioglu 0:a8fa94490a0a 32 * > printf("Too hot! (%f)", temperature.read());
gokmenascioglu 0:a8fa94490a0a 33 * > }
gokmenascioglu 0:a8fa94490a0a 34 * > }
gokmenascioglu 0:a8fa94490a0a 35 * > }
gokmenascioglu 0:a8fa94490a0a 36 */
gokmenascioglu 0:a8fa94490a0a 37 class AnalogIn : public Base {
gokmenascioglu 0:a8fa94490a0a 38
gokmenascioglu 0:a8fa94490a0a 39 public:
gokmenascioglu 0:a8fa94490a0a 40
gokmenascioglu 0:a8fa94490a0a 41 /* Constructor: AnalogIn
gokmenascioglu 0:a8fa94490a0a 42 * Create an AnalogIn, connected to the specified pin
gokmenascioglu 0:a8fa94490a0a 43 *
gokmenascioglu 0:a8fa94490a0a 44 * Variables:
gokmenascioglu 0:a8fa94490a0a 45 * pin - AnalogIn pin to connect to
gokmenascioglu 0:a8fa94490a0a 46 * name - (optional) A string to identify the object
gokmenascioglu 0:a8fa94490a0a 47 */
gokmenascioglu 0:a8fa94490a0a 48 AnalogIn(PinName pin, const char *name = NULL);
gokmenascioglu 0:a8fa94490a0a 49
gokmenascioglu 0:a8fa94490a0a 50 /* Function: read
gokmenascioglu 0:a8fa94490a0a 51 * Read the input voltage, represented as a float in the range [0.0, 1.0]
gokmenascioglu 0:a8fa94490a0a 52 *
gokmenascioglu 0:a8fa94490a0a 53 * Variables:
gokmenascioglu 0:a8fa94490a0a 54 * returns - A floating-point value representing the current input voltage,
gokmenascioglu 0:a8fa94490a0a 55 * measured as a percentage
gokmenascioglu 0:a8fa94490a0a 56 */
gokmenascioglu 0:a8fa94490a0a 57 float read();
gokmenascioglu 0:a8fa94490a0a 58
gokmenascioglu 0:a8fa94490a0a 59 /* Function: read_u16
gokmenascioglu 0:a8fa94490a0a 60 * Read the input voltage, represented as an unsigned short in the range [0x0, 0xFFFF]
gokmenascioglu 0:a8fa94490a0a 61 *
gokmenascioglu 0:a8fa94490a0a 62 * Variables:
gokmenascioglu 0:a8fa94490a0a 63 * returns - 16-bit unsigned short representing the current input voltage,
gokmenascioglu 0:a8fa94490a0a 64 * normalised to a 16-bit value
gokmenascioglu 0:a8fa94490a0a 65 */
gokmenascioglu 0:a8fa94490a0a 66 unsigned short read_u16();
gokmenascioglu 0:a8fa94490a0a 67
gokmenascioglu 0:a8fa94490a0a 68 #ifdef MBED_OPERATORS
gokmenascioglu 0:a8fa94490a0a 69 /* Function: operator float
gokmenascioglu 0:a8fa94490a0a 70 * An operator shorthand for <read()>
gokmenascioglu 0:a8fa94490a0a 71 *
gokmenascioglu 0:a8fa94490a0a 72 * The float() operator can be used as a shorthand for <read()> to simplify common code sequences
gokmenascioglu 0:a8fa94490a0a 73 *
gokmenascioglu 0:a8fa94490a0a 74 * Example:
gokmenascioglu 0:a8fa94490a0a 75 * > float x = volume.read();
gokmenascioglu 0:a8fa94490a0a 76 * > float x = volume;
gokmenascioglu 0:a8fa94490a0a 77 * >
gokmenascioglu 0:a8fa94490a0a 78 * > if(volume.read() > 0.25) { ... }
gokmenascioglu 0:a8fa94490a0a 79 * > if(volume > 0.25) { ... }
gokmenascioglu 0:a8fa94490a0a 80 */
gokmenascioglu 0:a8fa94490a0a 81 operator float();
gokmenascioglu 0:a8fa94490a0a 82 #endif
gokmenascioglu 0:a8fa94490a0a 83
gokmenascioglu 0:a8fa94490a0a 84 #ifdef MBED_RPC
gokmenascioglu 0:a8fa94490a0a 85 virtual const struct rpc_method *get_rpc_methods();
gokmenascioglu 0:a8fa94490a0a 86 static struct rpc_class *get_rpc_class();
gokmenascioglu 0:a8fa94490a0a 87 #endif
gokmenascioglu 0:a8fa94490a0a 88
gokmenascioglu 0:a8fa94490a0a 89 protected:
gokmenascioglu 0:a8fa94490a0a 90
gokmenascioglu 0:a8fa94490a0a 91 ADCName _adc;
gokmenascioglu 0:a8fa94490a0a 92
gokmenascioglu 0:a8fa94490a0a 93 };
gokmenascioglu 0:a8fa94490a0a 94
gokmenascioglu 0:a8fa94490a0a 95 } // namespace mbed
gokmenascioglu 0:a8fa94490a0a 96
gokmenascioglu 0:a8fa94490a0a 97 #endif
gokmenascioglu 0:a8fa94490a0a 98
gokmenascioglu 0:a8fa94490a0a 99 #endif