gokmen ascioglu / mbed

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AnalogOut.h@0:a8fa94490a0a, 2012-09-22 (annotated)

Committer:
gokmenascioglu
Date:
Sat Sep 22 10:32:07 2012 +0000
Revision:
0:a8fa94490a0a
alican library

Who changed what in which revision?

UserRevisionLine numberNew contents of line
gokmenascioglu 0:a8fa94490a0a 1 /* mbed Microcontroller Library - AnalogOut
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_ANALOGOUT_H
gokmenascioglu 0:a8fa94490a0a 6 #define MBED_ANALOGOUT_H
gokmenascioglu 0:a8fa94490a0a 7
gokmenascioglu 0:a8fa94490a0a 8 #include "device.h"
gokmenascioglu 0:a8fa94490a0a 9
gokmenascioglu 0:a8fa94490a0a 10 #if DEVICE_ANALOGOUT
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: AnalogOut
gokmenascioglu 0:a8fa94490a0a 20 * An analog output, used for setting the voltage on a pin
gokmenascioglu 0:a8fa94490a0a 21 *
gokmenascioglu 0:a8fa94490a0a 22 * Example:
gokmenascioglu 0:a8fa94490a0a 23 * > // Make a sawtooth output
gokmenascioglu 0:a8fa94490a0a 24 * >
gokmenascioglu 0:a8fa94490a0a 25 * > #include "mbed.h"
gokmenascioglu 0:a8fa94490a0a 26 * >
gokmenascioglu 0:a8fa94490a0a 27 * > AnalogOut tri(p18);
gokmenascioglu 0:a8fa94490a0a 28 * > int main() {
gokmenascioglu 0:a8fa94490a0a 29 * > while(1) {
gokmenascioglu 0:a8fa94490a0a 30 * > tri = tri + 0.01;
gokmenascioglu 0:a8fa94490a0a 31 * > wait_us(1);
gokmenascioglu 0:a8fa94490a0a 32 * > if(tri == 1) {
gokmenascioglu 0:a8fa94490a0a 33 * > tri = 0;
gokmenascioglu 0:a8fa94490a0a 34 * > }
gokmenascioglu 0:a8fa94490a0a 35 * > }
gokmenascioglu 0:a8fa94490a0a 36 * > }
gokmenascioglu 0:a8fa94490a0a 37 */
gokmenascioglu 0:a8fa94490a0a 38 class AnalogOut : public Base {
gokmenascioglu 0:a8fa94490a0a 39
gokmenascioglu 0:a8fa94490a0a 40 public:
gokmenascioglu 0:a8fa94490a0a 41
gokmenascioglu 0:a8fa94490a0a 42 /* Constructor: AnalogOut
gokmenascioglu 0:a8fa94490a0a 43 * Create an AnalogOut connected to the specified pin
gokmenascioglu 0:a8fa94490a0a 44 *
gokmenascioglu 0:a8fa94490a0a 45 * Variables:
gokmenascioglu 0:a8fa94490a0a 46 * pin - AnalogOut pin to connect to (18)
gokmenascioglu 0:a8fa94490a0a 47 */
gokmenascioglu 0:a8fa94490a0a 48 AnalogOut(PinName pin, const char *name = NULL);
gokmenascioglu 0:a8fa94490a0a 49
gokmenascioglu 0:a8fa94490a0a 50 /* Function: write
gokmenascioglu 0:a8fa94490a0a 51 * Set the output voltage, specified as a percentage (float)
gokmenascioglu 0:a8fa94490a0a 52 *
gokmenascioglu 0:a8fa94490a0a 53 * Variables:
gokmenascioglu 0:a8fa94490a0a 54 * percent - A floating-point value representing the output voltage,
gokmenascioglu 0:a8fa94490a0a 55 * specified as a percentage. The value should lie between
gokmenascioglu 0:a8fa94490a0a 56 * 0.0f (representing 0v / 0%) and 1.0f (representing 3.3v / 100%).
gokmenascioglu 0:a8fa94490a0a 57 * Values outside this range will be saturated to 0.0f or 1.0f.
gokmenascioglu 0:a8fa94490a0a 58 */
gokmenascioglu 0:a8fa94490a0a 59 void write(float value);
gokmenascioglu 0:a8fa94490a0a 60
gokmenascioglu 0:a8fa94490a0a 61 /* Function: write_u16
gokmenascioglu 0:a8fa94490a0a 62 * Set the output voltage, represented as an unsigned short in the range [0x0, 0xFFFF]
gokmenascioglu 0:a8fa94490a0a 63 *
gokmenascioglu 0:a8fa94490a0a 64 * Variables:
gokmenascioglu 0:a8fa94490a0a 65 * value - 16-bit unsigned short representing the output voltage,
gokmenascioglu 0:a8fa94490a0a 66 * normalised to a 16-bit value (0x0000 = 0v, 0xFFFF = 3.3v)
gokmenascioglu 0:a8fa94490a0a 67 */
gokmenascioglu 0:a8fa94490a0a 68 void write_u16(unsigned short value);
gokmenascioglu 0:a8fa94490a0a 69
gokmenascioglu 0:a8fa94490a0a 70 /* Function: read
gokmenascioglu 0:a8fa94490a0a 71 * Return the current output voltage setting, measured as a percentage (float)
gokmenascioglu 0:a8fa94490a0a 72 *
gokmenascioglu 0:a8fa94490a0a 73 * Variables:
gokmenascioglu 0:a8fa94490a0a 74 * returns - A floating-point value representing the current voltage being output on the pin,
gokmenascioglu 0:a8fa94490a0a 75 * measured as a percentage. The returned value will lie between
gokmenascioglu 0:a8fa94490a0a 76 * 0.0f (representing 0v / 0%) and 1.0f (representing 3.3v / 100%).
gokmenascioglu 0:a8fa94490a0a 77 *
gokmenascioglu 0:a8fa94490a0a 78 * Note:
gokmenascioglu 0:a8fa94490a0a 79 * This value may not match exactly the value set by a previous <write>.
gokmenascioglu 0:a8fa94490a0a 80 */
gokmenascioglu 0:a8fa94490a0a 81 float read();
gokmenascioglu 0:a8fa94490a0a 82
gokmenascioglu 0:a8fa94490a0a 83
gokmenascioglu 0:a8fa94490a0a 84 #ifdef MBED_OPERATORS
gokmenascioglu 0:a8fa94490a0a 85 /* Function: operator=
gokmenascioglu 0:a8fa94490a0a 86 * An operator shorthand for <write()>
gokmenascioglu 0:a8fa94490a0a 87 */
gokmenascioglu 0:a8fa94490a0a 88 AnalogOut& operator= (float percent);
gokmenascioglu 0:a8fa94490a0a 89 AnalogOut& operator= (AnalogOut& rhs);
gokmenascioglu 0:a8fa94490a0a 90
gokmenascioglu 0:a8fa94490a0a 91 /* Function: operator float()
gokmenascioglu 0:a8fa94490a0a 92 * An operator shorthand for <read()>
gokmenascioglu 0:a8fa94490a0a 93 */
gokmenascioglu 0:a8fa94490a0a 94 operator float();
gokmenascioglu 0:a8fa94490a0a 95 #endif
gokmenascioglu 0:a8fa94490a0a 96
gokmenascioglu 0:a8fa94490a0a 97 #ifdef MBED_RPC
gokmenascioglu 0:a8fa94490a0a 98 virtual const struct rpc_method *get_rpc_methods();
gokmenascioglu 0:a8fa94490a0a 99 static struct rpc_class *get_rpc_class();
gokmenascioglu 0:a8fa94490a0a 100 #endif
gokmenascioglu 0:a8fa94490a0a 101
gokmenascioglu 0:a8fa94490a0a 102 protected:
gokmenascioglu 0:a8fa94490a0a 103
gokmenascioglu 0:a8fa94490a0a 104 DACName _dac;
gokmenascioglu 0:a8fa94490a0a 105
gokmenascioglu 0:a8fa94490a0a 106 };
gokmenascioglu 0:a8fa94490a0a 107
gokmenascioglu 0:a8fa94490a0a 108 } // namespace mbed
gokmenascioglu 0:a8fa94490a0a 109
gokmenascioglu 0:a8fa94490a0a 110 #endif
gokmenascioglu 0:a8fa94490a0a 111
gokmenascioglu 0:a8fa94490a0a 112 #endif