jesus antonio lopez / mbed

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Dependents:   2doejemplo Labo_TRSE_Drone

Fork of mbed by mbed official

AnalogOut.h@55:d722ed6a4237, 2013-01-16 (annotated)

Committer:
emilmont
Date:
Wed Jan 16 12:56:34 2013 +0000
Revision:
55:d722ed6a4237
Parent:
54:71b101360fb9
Child:
59:0883845fe643
Include "sleep_api.h" in "mbed.h"

Add initial IAR toolchain support

LPC I2C: better handling of status

Add sleep mode support for the LPC1768

Correct GCC "__semihost" definition

Correct GCC "_isatty" retargeting

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emilmont 44:24d45a770a51 1 /* mbed Microcontroller Library
emilmont 54:71b101360fb9 2 * Copyright (c) 2006-2013 ARM Limited
emilmont 44:24d45a770a51 3 *
emilmont 44:24d45a770a51 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
emilmont 44:24d45a770a51 5 * of this software and associated documentation files (the "Software"), to deal
emilmont 44:24d45a770a51 6 * in the Software without restriction, including without limitation the rights
emilmont 44:24d45a770a51 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
emilmont 44:24d45a770a51 8 * copies of the Software, and to permit persons to whom the Software is
emilmont 44:24d45a770a51 9 * furnished to do so, subject to the following conditions:
emilmont 44:24d45a770a51 10 *
emilmont 44:24d45a770a51 11 * The above copyright notice and this permission notice shall be included in
emilmont 44:24d45a770a51 12 * all copies or substantial portions of the Software.
emilmont 44:24d45a770a51 13 *
emilmont 44:24d45a770a51 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
emilmont 44:24d45a770a51 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
emilmont 44:24d45a770a51 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
emilmont 44:24d45a770a51 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
emilmont 44:24d45a770a51 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
emilmont 44:24d45a770a51 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
emilmont 44:24d45a770a51 20 * SOFTWARE.
emilmont 44:24d45a770a51 21 */
simon.ford@mbed.co.uk 0:82220227f4fa 22 #ifndef MBED_ANALOGOUT_H
simon.ford@mbed.co.uk 0:82220227f4fa 23 #define MBED_ANALOGOUT_H
simon.ford@mbed.co.uk 0:82220227f4fa 24
emilmont 44:24d45a770a51 25 #include "platform.h"
emilmont 27:7110ebee3484 26
emilmont 27:7110ebee3484 27 #if DEVICE_ANALOGOUT
emilmont 27:7110ebee3484 28
emilmont 44:24d45a770a51 29 #include "analogout_api.h"
simon.ford@mbed.co.uk 0:82220227f4fa 30
simon.ford@mbed.co.uk 0:82220227f4fa 31 namespace mbed {
simon.ford@mbed.co.uk 0:82220227f4fa 32
emilmont 43:e2ed12d17f06 33 /** An analog output, used for setting the voltage on a pin
rolf.meyer@arm.com 11:1c1ebd0324fa 34 *
rolf.meyer@arm.com 11:1c1ebd0324fa 35 * Example:
emilmont 43:e2ed12d17f06 36 * @code
emilmont 43:e2ed12d17f06 37 * // Make a sawtooth output
emilmont 55:d722ed6a4237 38 *
emilmont 43:e2ed12d17f06 39 * #include "mbed.h"
emilmont 55:d722ed6a4237 40 *
emilmont 43:e2ed12d17f06 41 * AnalogOut tri(p18);
emilmont 43:e2ed12d17f06 42 * int main() {
emilmont 43:e2ed12d17f06 43 * while(1) {
emilmont 43:e2ed12d17f06 44 * tri = tri + 0.01;
emilmont 43:e2ed12d17f06 45 * wait_us(1);
emilmont 43:e2ed12d17f06 46 * if(tri == 1) {
emilmont 43:e2ed12d17f06 47 * tri = 0;
emilmont 43:e2ed12d17f06 48 * }
emilmont 43:e2ed12d17f06 49 * }
emilmont 43:e2ed12d17f06 50 * }
emilmont 43:e2ed12d17f06 51 * @endcode
simon.ford@mbed.co.uk 0:82220227f4fa 52 */
emilmont 44:24d45a770a51 53 class AnalogOut {
simon.ford@mbed.co.uk 0:82220227f4fa 54
simon.ford@mbed.co.uk 0:82220227f4fa 55 public:
simon.ford@mbed.co.uk 0:82220227f4fa 56
emilmont 43:e2ed12d17f06 57 /** Create an AnalogOut connected to the specified pin
emilmont 55:d722ed6a4237 58 *
emilmont 43:e2ed12d17f06 59 * @param AnalogOut pin to connect to (18)
emilmont 43:e2ed12d17f06 60 */
emilmont 44:24d45a770a51 61 AnalogOut(PinName pin) {
emilmont 44:24d45a770a51 62 analogout_init(&_dac, pin);
emilmont 44:24d45a770a51 63 }
emilmont 55:d722ed6a4237 64
emilmont 43:e2ed12d17f06 65 /** Set the output voltage, specified as a percentage (float)
rolf.meyer@arm.com 11:1c1ebd0324fa 66 *
emilmont 55:d722ed6a4237 67 * @param value A floating-point value representing the output voltage,
rolf.meyer@arm.com 11:1c1ebd0324fa 68 * specified as a percentage. The value should lie between
rolf.meyer@arm.com 11:1c1ebd0324fa 69 * 0.0f (representing 0v / 0%) and 1.0f (representing 3.3v / 100%).
emilmont 44:24d45a770a51 70 * Values outside this range will be saturated to 0.0f or 1.0f.
rolf.meyer@arm.com 11:1c1ebd0324fa 71 */
emilmont 44:24d45a770a51 72 void write(float value) {
emilmont 44:24d45a770a51 73 analogout_write(&_dac, value);
emilmont 44:24d45a770a51 74 }
emilmont 55:d722ed6a4237 75
emilmont 43:e2ed12d17f06 76 /** Set the output voltage, represented as an unsigned short in the range [0x0, 0xFFFF]
simon.ford@mbed.co.uk 5:62573be585e9 77 *
emilmont 43:e2ed12d17f06 78 * @param value 16-bit unsigned short representing the output voltage,
emilmont 44:24d45a770a51 79 * normalised to a 16-bit value (0x0000 = 0v, 0xFFFF = 3.3v)
simon.ford@mbed.co.uk 5:62573be585e9 80 */
emilmont 44:24d45a770a51 81 void write_u16(unsigned short value) {
emilmont 44:24d45a770a51 82 analogout_write_u16(&_dac, value);
emilmont 44:24d45a770a51 83 }
simon.ford@mbed.co.uk 5:62573be585e9 84
emilmont 43:e2ed12d17f06 85 /** Return the current output voltage setting, measured as a percentage (float)
simon.ford@mbed.co.uk 0:82220227f4fa 86 *
emilmont 43:e2ed12d17f06 87 * @returns
emilmont 55:d722ed6a4237 88 * A floating-point value representing the current voltage being output on the pin,
rolf.meyer@arm.com 11:1c1ebd0324fa 89 * measured as a percentage. The returned value will lie between
rolf.meyer@arm.com 11:1c1ebd0324fa 90 * 0.0f (representing 0v / 0%) and 1.0f (representing 3.3v / 100%).
rolf.meyer@arm.com 11:1c1ebd0324fa 91 *
emilmont 43:e2ed12d17f06 92 * @note
emilmont 43:e2ed12d17f06 93 * This value may not match exactly the value set by a previous write().
emilmont 44:24d45a770a51 94 */
emilmont 44:24d45a770a51 95 float read() {
emilmont 44:24d45a770a51 96 return analogout_read(&_dac);
emilmont 44:24d45a770a51 97 }
rolf.meyer@arm.com 11:1c1ebd0324fa 98
rolf.meyer@arm.com 11:1c1ebd0324fa 99 #ifdef MBED_OPERATORS
emilmont 43:e2ed12d17f06 100 /** An operator shorthand for write()
simon.ford@mbed.co.uk 0:82220227f4fa 101 */
emilmont 44:24d45a770a51 102 AnalogOut& operator= (float percent) {
emilmont 44:24d45a770a51 103 write(percent);
emilmont 44:24d45a770a51 104 return *this;
emilmont 44:24d45a770a51 105 }
emilmont 55:d722ed6a4237 106
emilmont 44:24d45a770a51 107 AnalogOut& operator= (AnalogOut& rhs) {
emilmont 44:24d45a770a51 108 write(rhs.read());
emilmont 44:24d45a770a51 109 return *this;
emilmont 44:24d45a770a51 110 }
simon.ford@mbed.co.uk 0:82220227f4fa 111
emilmont 43:e2ed12d17f06 112 /** An operator shorthand for read()
emilmont 44:24d45a770a51 113 */
emilmont 44:24d45a770a51 114 operator float() {
emilmont 44:24d45a770a51 115 return read();
emilmont 44:24d45a770a51 116 }
rolf.meyer@arm.com 11:1c1ebd0324fa 117 #endif
rolf.meyer@arm.com 11:1c1ebd0324fa 118
rolf.meyer@arm.com 11:1c1ebd0324fa 119 protected:
emilmont 44:24d45a770a51 120 dac_t _dac;
simon.ford@mbed.co.uk 0:82220227f4fa 121 };
simon.ford@mbed.co.uk 0:82220227f4fa 122
rolf.meyer@arm.com 11:1c1ebd0324fa 123 } // namespace mbed
simon.ford@mbed.co.uk 0:82220227f4fa 124
simon.ford@mbed.co.uk 1:6b7f447ca868 125 #endif
simon.ford@mbed.co.uk 1:6b7f447ca868 126
emilmont 27:7110ebee3484 127 #endif