fix LPC812 PWM
Fork of mbed-dev by
api/AnalogIn.h@0:9b334a45a8ff, 2015-10-01 (annotated)
- Committer:
- bogdanm
- Date:
- Thu Oct 01 15:25:22 2015 +0300
- Revision:
- 0:9b334a45a8ff
Initial commit on mbed-dev
Replaces mbed-src (now inactive)
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
bogdanm | 0:9b334a45a8ff | 1 | /* mbed Microcontroller Library |
bogdanm | 0:9b334a45a8ff | 2 | * Copyright (c) 2006-2013 ARM Limited |
bogdanm | 0:9b334a45a8ff | 3 | * |
bogdanm | 0:9b334a45a8ff | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
bogdanm | 0:9b334a45a8ff | 5 | * you may not use this file except in compliance with the License. |
bogdanm | 0:9b334a45a8ff | 6 | * You may obtain a copy of the License at |
bogdanm | 0:9b334a45a8ff | 7 | * |
bogdanm | 0:9b334a45a8ff | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
bogdanm | 0:9b334a45a8ff | 9 | * |
bogdanm | 0:9b334a45a8ff | 10 | * Unless required by applicable law or agreed to in writing, software |
bogdanm | 0:9b334a45a8ff | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
bogdanm | 0:9b334a45a8ff | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
bogdanm | 0:9b334a45a8ff | 13 | * See the License for the specific language governing permissions and |
bogdanm | 0:9b334a45a8ff | 14 | * limitations under the License. |
bogdanm | 0:9b334a45a8ff | 15 | */ |
bogdanm | 0:9b334a45a8ff | 16 | #ifndef MBED_ANALOGIN_H |
bogdanm | 0:9b334a45a8ff | 17 | #define MBED_ANALOGIN_H |
bogdanm | 0:9b334a45a8ff | 18 | |
bogdanm | 0:9b334a45a8ff | 19 | #include "platform.h" |
bogdanm | 0:9b334a45a8ff | 20 | |
bogdanm | 0:9b334a45a8ff | 21 | #if DEVICE_ANALOGIN |
bogdanm | 0:9b334a45a8ff | 22 | |
bogdanm | 0:9b334a45a8ff | 23 | #include "analogin_api.h" |
bogdanm | 0:9b334a45a8ff | 24 | |
bogdanm | 0:9b334a45a8ff | 25 | namespace mbed { |
bogdanm | 0:9b334a45a8ff | 26 | |
bogdanm | 0:9b334a45a8ff | 27 | /** An analog input, used for reading the voltage on a pin |
bogdanm | 0:9b334a45a8ff | 28 | * |
bogdanm | 0:9b334a45a8ff | 29 | * Example: |
bogdanm | 0:9b334a45a8ff | 30 | * @code |
bogdanm | 0:9b334a45a8ff | 31 | * // Print messages when the AnalogIn is greater than 50% |
bogdanm | 0:9b334a45a8ff | 32 | * |
bogdanm | 0:9b334a45a8ff | 33 | * #include "mbed.h" |
bogdanm | 0:9b334a45a8ff | 34 | * |
bogdanm | 0:9b334a45a8ff | 35 | * AnalogIn temperature(p20); |
bogdanm | 0:9b334a45a8ff | 36 | * |
bogdanm | 0:9b334a45a8ff | 37 | * int main() { |
bogdanm | 0:9b334a45a8ff | 38 | * while(1) { |
bogdanm | 0:9b334a45a8ff | 39 | * if(temperature > 0.5) { |
bogdanm | 0:9b334a45a8ff | 40 | * printf("Too hot! (%f)", temperature.read()); |
bogdanm | 0:9b334a45a8ff | 41 | * } |
bogdanm | 0:9b334a45a8ff | 42 | * } |
bogdanm | 0:9b334a45a8ff | 43 | * } |
bogdanm | 0:9b334a45a8ff | 44 | * @endcode |
bogdanm | 0:9b334a45a8ff | 45 | */ |
bogdanm | 0:9b334a45a8ff | 46 | class AnalogIn { |
bogdanm | 0:9b334a45a8ff | 47 | |
bogdanm | 0:9b334a45a8ff | 48 | public: |
bogdanm | 0:9b334a45a8ff | 49 | |
bogdanm | 0:9b334a45a8ff | 50 | /** Create an AnalogIn, connected to the specified pin |
bogdanm | 0:9b334a45a8ff | 51 | * |
bogdanm | 0:9b334a45a8ff | 52 | * @param pin AnalogIn pin to connect to |
bogdanm | 0:9b334a45a8ff | 53 | * @param name (optional) A string to identify the object |
bogdanm | 0:9b334a45a8ff | 54 | */ |
bogdanm | 0:9b334a45a8ff | 55 | AnalogIn(PinName pin) { |
bogdanm | 0:9b334a45a8ff | 56 | analogin_init(&_adc, pin); |
bogdanm | 0:9b334a45a8ff | 57 | } |
bogdanm | 0:9b334a45a8ff | 58 | |
bogdanm | 0:9b334a45a8ff | 59 | /** Read the input voltage, represented as a float in the range [0.0, 1.0] |
bogdanm | 0:9b334a45a8ff | 60 | * |
bogdanm | 0:9b334a45a8ff | 61 | * @returns A floating-point value representing the current input voltage, measured as a percentage |
bogdanm | 0:9b334a45a8ff | 62 | */ |
bogdanm | 0:9b334a45a8ff | 63 | float read() { |
bogdanm | 0:9b334a45a8ff | 64 | return analogin_read(&_adc); |
bogdanm | 0:9b334a45a8ff | 65 | } |
bogdanm | 0:9b334a45a8ff | 66 | |
bogdanm | 0:9b334a45a8ff | 67 | /** Read the input voltage, represented as an unsigned short in the range [0x0, 0xFFFF] |
bogdanm | 0:9b334a45a8ff | 68 | * |
bogdanm | 0:9b334a45a8ff | 69 | * @returns |
bogdanm | 0:9b334a45a8ff | 70 | * 16-bit unsigned short representing the current input voltage, normalised to a 16-bit value |
bogdanm | 0:9b334a45a8ff | 71 | */ |
bogdanm | 0:9b334a45a8ff | 72 | unsigned short read_u16() { |
bogdanm | 0:9b334a45a8ff | 73 | return analogin_read_u16(&_adc); |
bogdanm | 0:9b334a45a8ff | 74 | } |
bogdanm | 0:9b334a45a8ff | 75 | |
bogdanm | 0:9b334a45a8ff | 76 | #ifdef MBED_OPERATORS |
bogdanm | 0:9b334a45a8ff | 77 | /** An operator shorthand for read() |
bogdanm | 0:9b334a45a8ff | 78 | * |
bogdanm | 0:9b334a45a8ff | 79 | * The float() operator can be used as a shorthand for read() to simplify common code sequences |
bogdanm | 0:9b334a45a8ff | 80 | * |
bogdanm | 0:9b334a45a8ff | 81 | * Example: |
bogdanm | 0:9b334a45a8ff | 82 | * @code |
bogdanm | 0:9b334a45a8ff | 83 | * float x = volume.read(); |
bogdanm | 0:9b334a45a8ff | 84 | * float x = volume; |
bogdanm | 0:9b334a45a8ff | 85 | * |
bogdanm | 0:9b334a45a8ff | 86 | * if(volume.read() > 0.25) { ... } |
bogdanm | 0:9b334a45a8ff | 87 | * if(volume > 0.25) { ... } |
bogdanm | 0:9b334a45a8ff | 88 | * @endcode |
bogdanm | 0:9b334a45a8ff | 89 | */ |
bogdanm | 0:9b334a45a8ff | 90 | operator float() { |
bogdanm | 0:9b334a45a8ff | 91 | return read(); |
bogdanm | 0:9b334a45a8ff | 92 | } |
bogdanm | 0:9b334a45a8ff | 93 | #endif |
bogdanm | 0:9b334a45a8ff | 94 | |
bogdanm | 0:9b334a45a8ff | 95 | protected: |
bogdanm | 0:9b334a45a8ff | 96 | analogin_t _adc; |
bogdanm | 0:9b334a45a8ff | 97 | }; |
bogdanm | 0:9b334a45a8ff | 98 | |
bogdanm | 0:9b334a45a8ff | 99 | } // namespace mbed |
bogdanm | 0:9b334a45a8ff | 100 | |
bogdanm | 0:9b334a45a8ff | 101 | #endif |
bogdanm | 0:9b334a45a8ff | 102 | |
bogdanm | 0:9b334a45a8ff | 103 | #endif |