jesus antonio lopez / mbed

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AnalogOut.h@59:0883845fe643, 2013-02-18 (annotated)

Committer:
emilmont
Date:
Mon Feb 18 11:12:58 2013 +0000
Revision:
59:0883845fe643
Parent:
55:d722ed6a4237
Child:
65:5798e58a58b1
Add pinmap NC terminators for LPC1768 CAN.

Update the license from MIT to Apache v2.

Make the semihost code target independent using opportune defines for the UID and MAC.

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 59:0883845fe643 4 * Licensed under the Apache License, Version 2.0 (the "License");
emilmont 59:0883845fe643 5 * you may not use this file except in compliance with the License.
emilmont 59:0883845fe643 6 * You may obtain a copy of the License at
emilmont 59:0883845fe643 7 *
emilmont 59:0883845fe643 8 * http://www.apache.org/licenses/LICENSE-2.0
emilmont 44:24d45a770a51 9 *
emilmont 59:0883845fe643 10 * Unless required by applicable law or agreed to in writing, software
emilmont 59:0883845fe643 11 * distributed under the License is distributed on an "AS IS" BASIS,
emilmont 59:0883845fe643 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
emilmont 59:0883845fe643 13 * See the License for the specific language governing permissions and
emilmont 59:0883845fe643 14 * limitations under the License.
emilmont 44:24d45a770a51 15 */
simon.ford@mbed.co.uk 0:82220227f4fa 16 #ifndef MBED_ANALOGOUT_H
simon.ford@mbed.co.uk 0:82220227f4fa 17 #define MBED_ANALOGOUT_H
simon.ford@mbed.co.uk 0:82220227f4fa 18
emilmont 44:24d45a770a51 19 #include "platform.h"
emilmont 27:7110ebee3484 20
emilmont 27:7110ebee3484 21 #if DEVICE_ANALOGOUT
emilmont 27:7110ebee3484 22
emilmont 44:24d45a770a51 23 #include "analogout_api.h"
simon.ford@mbed.co.uk 0:82220227f4fa 24
simon.ford@mbed.co.uk 0:82220227f4fa 25 namespace mbed {
simon.ford@mbed.co.uk 0:82220227f4fa 26
emilmont 43:e2ed12d17f06 27 /** An analog output, used for setting the voltage on a pin
rolf.meyer@arm.com 11:1c1ebd0324fa 28 *
rolf.meyer@arm.com 11:1c1ebd0324fa 29 * Example:
emilmont 43:e2ed12d17f06 30 * @code
emilmont 43:e2ed12d17f06 31 * // Make a sawtooth output
emilmont 55:d722ed6a4237 32 *
emilmont 43:e2ed12d17f06 33 * #include "mbed.h"
emilmont 55:d722ed6a4237 34 *
emilmont 43:e2ed12d17f06 35 * AnalogOut tri(p18);
emilmont 43:e2ed12d17f06 36 * int main() {
emilmont 43:e2ed12d17f06 37 * while(1) {
emilmont 43:e2ed12d17f06 38 * tri = tri + 0.01;
emilmont 43:e2ed12d17f06 39 * wait_us(1);
emilmont 43:e2ed12d17f06 40 * if(tri == 1) {
emilmont 43:e2ed12d17f06 41 * tri = 0;
emilmont 43:e2ed12d17f06 42 * }
emilmont 43:e2ed12d17f06 43 * }
emilmont 43:e2ed12d17f06 44 * }
emilmont 43:e2ed12d17f06 45 * @endcode
simon.ford@mbed.co.uk 0:82220227f4fa 46 */
emilmont 44:24d45a770a51 47 class AnalogOut {
simon.ford@mbed.co.uk 0:82220227f4fa 48
simon.ford@mbed.co.uk 0:82220227f4fa 49 public:
simon.ford@mbed.co.uk 0:82220227f4fa 50
emilmont 43:e2ed12d17f06 51 /** Create an AnalogOut connected to the specified pin
emilmont 55:d722ed6a4237 52 *
emilmont 43:e2ed12d17f06 53 * @param AnalogOut pin to connect to (18)
emilmont 43:e2ed12d17f06 54 */
emilmont 44:24d45a770a51 55 AnalogOut(PinName pin) {
emilmont 44:24d45a770a51 56 analogout_init(&_dac, pin);
emilmont 44:24d45a770a51 57 }
emilmont 55:d722ed6a4237 58
emilmont 43:e2ed12d17f06 59 /** Set the output voltage, specified as a percentage (float)
rolf.meyer@arm.com 11:1c1ebd0324fa 60 *
emilmont 55:d722ed6a4237 61 * @param value A floating-point value representing the output voltage,
rolf.meyer@arm.com 11:1c1ebd0324fa 62 * specified as a percentage. The value should lie between
rolf.meyer@arm.com 11:1c1ebd0324fa 63 * 0.0f (representing 0v / 0%) and 1.0f (representing 3.3v / 100%).
emilmont 44:24d45a770a51 64 * Values outside this range will be saturated to 0.0f or 1.0f.
rolf.meyer@arm.com 11:1c1ebd0324fa 65 */
emilmont 44:24d45a770a51 66 void write(float value) {
emilmont 44:24d45a770a51 67 analogout_write(&_dac, value);
emilmont 44:24d45a770a51 68 }
emilmont 55:d722ed6a4237 69
emilmont 43:e2ed12d17f06 70 /** Set the output voltage, represented as an unsigned short in the range [0x0, 0xFFFF]
simon.ford@mbed.co.uk 5:62573be585e9 71 *
emilmont 43:e2ed12d17f06 72 * @param value 16-bit unsigned short representing the output voltage,
emilmont 44:24d45a770a51 73 * normalised to a 16-bit value (0x0000 = 0v, 0xFFFF = 3.3v)
simon.ford@mbed.co.uk 5:62573be585e9 74 */
emilmont 44:24d45a770a51 75 void write_u16(unsigned short value) {
emilmont 44:24d45a770a51 76 analogout_write_u16(&_dac, value);
emilmont 44:24d45a770a51 77 }
simon.ford@mbed.co.uk 5:62573be585e9 78
emilmont 43:e2ed12d17f06 79 /** Return the current output voltage setting, measured as a percentage (float)
simon.ford@mbed.co.uk 0:82220227f4fa 80 *
emilmont 43:e2ed12d17f06 81 * @returns
emilmont 55:d722ed6a4237 82 * A floating-point value representing the current voltage being output on the pin,
rolf.meyer@arm.com 11:1c1ebd0324fa 83 * measured as a percentage. The returned value will lie between
rolf.meyer@arm.com 11:1c1ebd0324fa 84 * 0.0f (representing 0v / 0%) and 1.0f (representing 3.3v / 100%).
rolf.meyer@arm.com 11:1c1ebd0324fa 85 *
emilmont 43:e2ed12d17f06 86 * @note
emilmont 43:e2ed12d17f06 87 * This value may not match exactly the value set by a previous write().
emilmont 44:24d45a770a51 88 */
emilmont 44:24d45a770a51 89 float read() {
emilmont 44:24d45a770a51 90 return analogout_read(&_dac);
emilmont 44:24d45a770a51 91 }
rolf.meyer@arm.com 11:1c1ebd0324fa 92
rolf.meyer@arm.com 11:1c1ebd0324fa 93 #ifdef MBED_OPERATORS
emilmont 43:e2ed12d17f06 94 /** An operator shorthand for write()
simon.ford@mbed.co.uk 0:82220227f4fa 95 */
emilmont 44:24d45a770a51 96 AnalogOut& operator= (float percent) {
emilmont 44:24d45a770a51 97 write(percent);
emilmont 44:24d45a770a51 98 return *this;
emilmont 44:24d45a770a51 99 }
emilmont 55:d722ed6a4237 100
emilmont 44:24d45a770a51 101 AnalogOut& operator= (AnalogOut& rhs) {
emilmont 44:24d45a770a51 102 write(rhs.read());
emilmont 44:24d45a770a51 103 return *this;
emilmont 44:24d45a770a51 104 }
simon.ford@mbed.co.uk 0:82220227f4fa 105
emilmont 43:e2ed12d17f06 106 /** An operator shorthand for read()
emilmont 44:24d45a770a51 107 */
emilmont 44:24d45a770a51 108 operator float() {
emilmont 44:24d45a770a51 109 return read();
emilmont 44:24d45a770a51 110 }
rolf.meyer@arm.com 11:1c1ebd0324fa 111 #endif
rolf.meyer@arm.com 11:1c1ebd0324fa 112
rolf.meyer@arm.com 11:1c1ebd0324fa 113 protected:
emilmont 44:24d45a770a51 114 dac_t _dac;
simon.ford@mbed.co.uk 0:82220227f4fa 115 };
simon.ford@mbed.co.uk 0:82220227f4fa 116
rolf.meyer@arm.com 11:1c1ebd0324fa 117 } // namespace mbed
simon.ford@mbed.co.uk 0:82220227f4fa 118
simon.ford@mbed.co.uk 1:6b7f447ca868 119 #endif
simon.ford@mbed.co.uk 1:6b7f447ca868 120
emilmont 27:7110ebee3484 121 #endif