Opencv 3.1 project on GR-PEACH board
Fork of gr-peach-opencv-project by
drivers/DigitalIn.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_DIGITALIN_H |
thedo | 167:1657b442184c | 17 | #define MBED_DIGITALIN_H |
thedo | 167:1657b442184c | 18 | |
thedo | 167:1657b442184c | 19 | #include "platform/platform.h" |
thedo | 167:1657b442184c | 20 | |
thedo | 167:1657b442184c | 21 | #include "hal/gpio_api.h" |
thedo | 167:1657b442184c | 22 | #include "platform/mbed_critical.h" |
thedo | 167:1657b442184c | 23 | |
thedo | 167:1657b442184c | 24 | namespace mbed { |
thedo | 167:1657b442184c | 25 | /** \addtogroup drivers */ |
thedo | 167:1657b442184c | 26 | |
thedo | 167:1657b442184c | 27 | /** A digital input, used for reading the state of a pin |
thedo | 167:1657b442184c | 28 | * |
thedo | 167:1657b442184c | 29 | * @note Synchronization level: Interrupt safe |
thedo | 167:1657b442184c | 30 | * |
thedo | 167:1657b442184c | 31 | * Example: |
thedo | 167:1657b442184c | 32 | * @code |
thedo | 167:1657b442184c | 33 | * // Flash an LED while a DigitalIn is true |
thedo | 167:1657b442184c | 34 | * |
thedo | 167:1657b442184c | 35 | * #include "mbed.h" |
thedo | 167:1657b442184c | 36 | * |
thedo | 167:1657b442184c | 37 | * DigitalIn enable(p5); |
thedo | 167:1657b442184c | 38 | * DigitalOut led(LED1); |
thedo | 167:1657b442184c | 39 | * |
thedo | 167:1657b442184c | 40 | * int main() { |
thedo | 167:1657b442184c | 41 | * while(1) { |
thedo | 167:1657b442184c | 42 | * if(enable) { |
thedo | 167:1657b442184c | 43 | * led = !led; |
thedo | 167:1657b442184c | 44 | * } |
thedo | 167:1657b442184c | 45 | * wait(0.25); |
thedo | 167:1657b442184c | 46 | * } |
thedo | 167:1657b442184c | 47 | * } |
thedo | 167:1657b442184c | 48 | * @endcode |
thedo | 167:1657b442184c | 49 | * @ingroup drivers |
thedo | 167:1657b442184c | 50 | */ |
thedo | 167:1657b442184c | 51 | class DigitalIn { |
thedo | 167:1657b442184c | 52 | |
thedo | 167:1657b442184c | 53 | public: |
thedo | 167:1657b442184c | 54 | /** Create a DigitalIn connected to the specified pin |
thedo | 167:1657b442184c | 55 | * |
thedo | 167:1657b442184c | 56 | * @param pin DigitalIn pin to connect to |
thedo | 167:1657b442184c | 57 | */ |
thedo | 167:1657b442184c | 58 | DigitalIn(PinName pin) : gpio() { |
thedo | 167:1657b442184c | 59 | // No lock needed in the constructor |
thedo | 167:1657b442184c | 60 | gpio_init_in(&gpio, pin); |
thedo | 167:1657b442184c | 61 | } |
thedo | 167:1657b442184c | 62 | |
thedo | 167:1657b442184c | 63 | /** Create a DigitalIn connected to the specified pin |
thedo | 167:1657b442184c | 64 | * |
thedo | 167:1657b442184c | 65 | * @param pin DigitalIn pin to connect to |
thedo | 167:1657b442184c | 66 | * @param mode the initial mode of the pin |
thedo | 167:1657b442184c | 67 | */ |
thedo | 167:1657b442184c | 68 | DigitalIn(PinName pin, PinMode mode) : gpio() { |
thedo | 167:1657b442184c | 69 | // No lock needed in the constructor |
thedo | 167:1657b442184c | 70 | gpio_init_in_ex(&gpio, pin, mode); |
thedo | 167:1657b442184c | 71 | } |
thedo | 167:1657b442184c | 72 | /** Read the input, represented as 0 or 1 (int) |
thedo | 167:1657b442184c | 73 | * |
thedo | 167:1657b442184c | 74 | * @returns |
thedo | 167:1657b442184c | 75 | * An integer representing the state of the input pin, |
thedo | 167:1657b442184c | 76 | * 0 for logical 0, 1 for logical 1 |
thedo | 167:1657b442184c | 77 | */ |
thedo | 167:1657b442184c | 78 | int read() { |
thedo | 167:1657b442184c | 79 | // Thread safe / atomic HAL call |
thedo | 167:1657b442184c | 80 | return gpio_read(&gpio); |
thedo | 167:1657b442184c | 81 | } |
thedo | 167:1657b442184c | 82 | |
thedo | 167:1657b442184c | 83 | /** Set the input pin mode |
thedo | 167:1657b442184c | 84 | * |
thedo | 167:1657b442184c | 85 | * @param pull PullUp, PullDown, PullNone, OpenDrain |
thedo | 167:1657b442184c | 86 | */ |
thedo | 167:1657b442184c | 87 | void mode(PinMode pull) { |
thedo | 167:1657b442184c | 88 | core_util_critical_section_enter(); |
thedo | 167:1657b442184c | 89 | gpio_mode(&gpio, pull); |
thedo | 167:1657b442184c | 90 | core_util_critical_section_exit(); |
thedo | 167:1657b442184c | 91 | } |
thedo | 167:1657b442184c | 92 | |
thedo | 167:1657b442184c | 93 | /** Return the output setting, represented as 0 or 1 (int) |
thedo | 167:1657b442184c | 94 | * |
thedo | 167:1657b442184c | 95 | * @returns |
thedo | 167:1657b442184c | 96 | * Non zero value if pin is connected to uc GPIO |
thedo | 167:1657b442184c | 97 | * 0 if gpio object was initialized with NC |
thedo | 167:1657b442184c | 98 | */ |
thedo | 167:1657b442184c | 99 | int is_connected() { |
thedo | 167:1657b442184c | 100 | // Thread safe / atomic HAL call |
thedo | 167:1657b442184c | 101 | return gpio_is_connected(&gpio); |
thedo | 167:1657b442184c | 102 | } |
thedo | 167:1657b442184c | 103 | |
thedo | 167:1657b442184c | 104 | /** An operator shorthand for read() |
thedo | 167:1657b442184c | 105 | */ |
thedo | 167:1657b442184c | 106 | operator int() { |
thedo | 167:1657b442184c | 107 | // Underlying read is thread safe |
thedo | 167:1657b442184c | 108 | return read(); |
thedo | 167:1657b442184c | 109 | } |
thedo | 167:1657b442184c | 110 | |
thedo | 167:1657b442184c | 111 | protected: |
thedo | 167:1657b442184c | 112 | gpio_t gpio; |
thedo | 167:1657b442184c | 113 | }; |
thedo | 167:1657b442184c | 114 | |
thedo | 167:1657b442184c | 115 | } // namespace mbed |
thedo | 167:1657b442184c | 116 | |
thedo | 167:1657b442184c | 117 | #endif |
thedo | 167:1657b442184c | 118 |