Opencv 3.1 project on GR-PEACH board
Fork of gr-peach-opencv-project by
drivers/AnalogOut.h@170:54ff26da7eb6, 2017-07-04 (annotated)
- Committer:
- thedo
- Date:
- Tue Jul 04 06:23:13 2017 +0000
- Revision:
- 170:54ff26da7eb6
- Parent:
- 167:1657b442184c
project opencv 3.1 on GR PEACH board, no use SD card.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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thedo | 167:1657b442184c | 1 | /* mbed Microcontroller Library |
thedo | 167:1657b442184c | 2 | * Copyright (c) 2006-2013 ARM Limited |
thedo | 167:1657b442184c | 3 | * |
thedo | 167:1657b442184c | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
thedo | 167:1657b442184c | 5 | * you may not use this file except in compliance with the License. |
thedo | 167:1657b442184c | 6 | * You may obtain a copy of the License at |
thedo | 167:1657b442184c | 7 | * |
thedo | 167:1657b442184c | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
thedo | 167:1657b442184c | 9 | * |
thedo | 167:1657b442184c | 10 | * Unless required by applicable law or agreed to in writing, software |
thedo | 167:1657b442184c | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
thedo | 167:1657b442184c | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
thedo | 167:1657b442184c | 13 | * See the License for the specific language governing permissions and |
thedo | 167:1657b442184c | 14 | * limitations under the License. |
thedo | 167:1657b442184c | 15 | */ |
thedo | 167:1657b442184c | 16 | #ifndef MBED_ANALOGOUT_H |
thedo | 167:1657b442184c | 17 | #define MBED_ANALOGOUT_H |
thedo | 167:1657b442184c | 18 | |
thedo | 167:1657b442184c | 19 | #include "platform/platform.h" |
thedo | 167:1657b442184c | 20 | |
thedo | 167:1657b442184c | 21 | #if defined (DEVICE_ANALOGOUT) || defined(DOXYGEN_ONLY) |
thedo | 167:1657b442184c | 22 | |
thedo | 167:1657b442184c | 23 | #include "hal/analogout_api.h" |
thedo | 167:1657b442184c | 24 | #include "platform/PlatformMutex.h" |
thedo | 167:1657b442184c | 25 | |
thedo | 167:1657b442184c | 26 | namespace mbed { |
thedo | 167:1657b442184c | 27 | /** \addtogroup drivers */ |
thedo | 167:1657b442184c | 28 | |
thedo | 167:1657b442184c | 29 | /** An analog output, used for setting the voltage on a pin |
thedo | 167:1657b442184c | 30 | * |
thedo | 167:1657b442184c | 31 | * @note Synchronization level: Thread safe |
thedo | 167:1657b442184c | 32 | * |
thedo | 167:1657b442184c | 33 | * Example: |
thedo | 167:1657b442184c | 34 | * @code |
thedo | 167:1657b442184c | 35 | * // Make a sawtooth output |
thedo | 167:1657b442184c | 36 | * |
thedo | 167:1657b442184c | 37 | * #include "mbed.h" |
thedo | 167:1657b442184c | 38 | * |
thedo | 167:1657b442184c | 39 | * AnalogOut tri(p18); |
thedo | 167:1657b442184c | 40 | * int main() { |
thedo | 167:1657b442184c | 41 | * while(1) { |
thedo | 167:1657b442184c | 42 | * tri = tri + 0.01; |
thedo | 167:1657b442184c | 43 | * wait_us(1); |
thedo | 167:1657b442184c | 44 | * if(tri == 1) { |
thedo | 167:1657b442184c | 45 | * tri = 0; |
thedo | 167:1657b442184c | 46 | * } |
thedo | 167:1657b442184c | 47 | * } |
thedo | 167:1657b442184c | 48 | * } |
thedo | 167:1657b442184c | 49 | * @endcode |
thedo | 167:1657b442184c | 50 | * @ingroup drivers |
thedo | 167:1657b442184c | 51 | */ |
thedo | 167:1657b442184c | 52 | class AnalogOut { |
thedo | 167:1657b442184c | 53 | |
thedo | 167:1657b442184c | 54 | public: |
thedo | 167:1657b442184c | 55 | |
thedo | 167:1657b442184c | 56 | /** Create an AnalogOut connected to the specified pin |
thedo | 167:1657b442184c | 57 | * |
thedo | 167:1657b442184c | 58 | * @param pin AnalogOut pin to connect to |
thedo | 167:1657b442184c | 59 | */ |
thedo | 167:1657b442184c | 60 | AnalogOut(PinName pin) { |
thedo | 167:1657b442184c | 61 | analogout_init(&_dac, pin); |
thedo | 167:1657b442184c | 62 | } |
thedo | 167:1657b442184c | 63 | |
thedo | 167:1657b442184c | 64 | /** Set the output voltage, specified as a percentage (float) |
thedo | 167:1657b442184c | 65 | * |
thedo | 167:1657b442184c | 66 | * @param value A floating-point value representing the output voltage, |
thedo | 167:1657b442184c | 67 | * specified as a percentage. The value should lie between |
thedo | 167:1657b442184c | 68 | * 0.0f (representing 0v / 0%) and 1.0f (representing 3.3v / 100%). |
thedo | 167:1657b442184c | 69 | * Values outside this range will be saturated to 0.0f or 1.0f. |
thedo | 167:1657b442184c | 70 | */ |
thedo | 167:1657b442184c | 71 | void write(float value) { |
thedo | 167:1657b442184c | 72 | lock(); |
thedo | 167:1657b442184c | 73 | analogout_write(&_dac, value); |
thedo | 167:1657b442184c | 74 | unlock(); |
thedo | 167:1657b442184c | 75 | } |
thedo | 167:1657b442184c | 76 | |
thedo | 167:1657b442184c | 77 | /** Set the output voltage, represented as an unsigned short in the range [0x0, 0xFFFF] |
thedo | 167:1657b442184c | 78 | * |
thedo | 167:1657b442184c | 79 | * @param value 16-bit unsigned short representing the output voltage, |
thedo | 167:1657b442184c | 80 | * normalised to a 16-bit value (0x0000 = 0v, 0xFFFF = 3.3v) |
thedo | 167:1657b442184c | 81 | */ |
thedo | 167:1657b442184c | 82 | void write_u16(unsigned short value) { |
thedo | 167:1657b442184c | 83 | lock(); |
thedo | 167:1657b442184c | 84 | analogout_write_u16(&_dac, value); |
thedo | 167:1657b442184c | 85 | unlock(); |
thedo | 167:1657b442184c | 86 | } |
thedo | 167:1657b442184c | 87 | |
thedo | 167:1657b442184c | 88 | /** Return the current output voltage setting, measured as a percentage (float) |
thedo | 167:1657b442184c | 89 | * |
thedo | 167:1657b442184c | 90 | * @returns |
thedo | 167:1657b442184c | 91 | * A floating-point value representing the current voltage being output on the pin, |
thedo | 167:1657b442184c | 92 | * measured as a percentage. The returned value will lie between |
thedo | 167:1657b442184c | 93 | * 0.0f (representing 0v / 0%) and 1.0f (representing 3.3v / 100%). |
thedo | 167:1657b442184c | 94 | * |
thedo | 167:1657b442184c | 95 | * @note |
thedo | 167:1657b442184c | 96 | * This value may not match exactly the value set by a previous write(). |
thedo | 167:1657b442184c | 97 | */ |
thedo | 167:1657b442184c | 98 | float read() { |
thedo | 167:1657b442184c | 99 | lock(); |
thedo | 167:1657b442184c | 100 | float ret = analogout_read(&_dac); |
thedo | 167:1657b442184c | 101 | unlock(); |
thedo | 167:1657b442184c | 102 | return ret; |
thedo | 167:1657b442184c | 103 | } |
thedo | 167:1657b442184c | 104 | |
thedo | 167:1657b442184c | 105 | /** An operator shorthand for write() |
thedo | 167:1657b442184c | 106 | */ |
thedo | 167:1657b442184c | 107 | AnalogOut& operator= (float percent) { |
thedo | 167:1657b442184c | 108 | // Underlying write call is thread safe |
thedo | 167:1657b442184c | 109 | write(percent); |
thedo | 167:1657b442184c | 110 | return *this; |
thedo | 167:1657b442184c | 111 | } |
thedo | 167:1657b442184c | 112 | |
thedo | 167:1657b442184c | 113 | AnalogOut& operator= (AnalogOut& rhs) { |
thedo | 167:1657b442184c | 114 | // Underlying write call is thread safe |
thedo | 167:1657b442184c | 115 | write(rhs.read()); |
thedo | 167:1657b442184c | 116 | return *this; |
thedo | 167:1657b442184c | 117 | } |
thedo | 167:1657b442184c | 118 | |
thedo | 167:1657b442184c | 119 | /** An operator shorthand for read() |
thedo | 167:1657b442184c | 120 | */ |
thedo | 167:1657b442184c | 121 | operator float() { |
thedo | 167:1657b442184c | 122 | // Underlying read call is thread safe |
thedo | 167:1657b442184c | 123 | return read(); |
thedo | 167:1657b442184c | 124 | } |
thedo | 167:1657b442184c | 125 | |
thedo | 167:1657b442184c | 126 | virtual ~AnalogOut() { |
thedo | 167:1657b442184c | 127 | // Do nothing |
thedo | 167:1657b442184c | 128 | } |
thedo | 167:1657b442184c | 129 | |
thedo | 167:1657b442184c | 130 | protected: |
thedo | 167:1657b442184c | 131 | |
thedo | 167:1657b442184c | 132 | virtual void lock() { |
thedo | 167:1657b442184c | 133 | _mutex.lock(); |
thedo | 167:1657b442184c | 134 | } |
thedo | 167:1657b442184c | 135 | |
thedo | 167:1657b442184c | 136 | virtual void unlock() { |
thedo | 167:1657b442184c | 137 | _mutex.unlock(); |
thedo | 167:1657b442184c | 138 | } |
thedo | 167:1657b442184c | 139 | |
thedo | 167:1657b442184c | 140 | dac_t _dac; |
thedo | 167:1657b442184c | 141 | PlatformMutex _mutex; |
thedo | 167:1657b442184c | 142 | }; |
thedo | 167:1657b442184c | 143 | |
thedo | 167:1657b442184c | 144 | } // namespace mbed |
thedo | 167:1657b442184c | 145 | |
thedo | 167:1657b442184c | 146 | #endif |
thedo | 167:1657b442184c | 147 | |
thedo | 167:1657b442184c | 148 | #endif |
thedo | 167:1657b442184c | 149 |