Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

api/InterruptIn.h@147:ba84b7dc41a7, 2016-09-10 (annotated)

Committer:
JojoS
Date:
Sat Sep 10 15:32:04 2016 +0000
Revision:
147:ba84b7dc41a7
Parent:
144:ef7eb2e8f9f7 
added prescaler for 16 bit timers (solution as in LPC11xx), default prescaler 31 for max 28 ms period time

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /* mbed Microcontroller Library
<> 144:ef7eb2e8f9f7 2 * Copyright (c) 2006-2013 ARM Limited
<> 144:ef7eb2e8f9f7 3 *
<> 144:ef7eb2e8f9f7 4 * Licensed under the Apache License, Version 2.0 (the "License");
<> 144:ef7eb2e8f9f7 5 * you may not use this file except in compliance with the License.
<> 144:ef7eb2e8f9f7 6 * You may obtain a copy of the License at
<> 144:ef7eb2e8f9f7 7 *
<> 144:ef7eb2e8f9f7 8 * http://www.apache.org/licenses/LICENSE-2.0
<> 144:ef7eb2e8f9f7 9 *
<> 144:ef7eb2e8f9f7 10 * Unless required by applicable law or agreed to in writing, software
<> 144:ef7eb2e8f9f7 11 * distributed under the License is distributed on an "AS IS" BASIS,
<> 144:ef7eb2e8f9f7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 144:ef7eb2e8f9f7 13 * See the License for the specific language governing permissions and
<> 144:ef7eb2e8f9f7 14 * limitations under the License.
<> 144:ef7eb2e8f9f7 15 */
<> 144:ef7eb2e8f9f7 16 #ifndef MBED_INTERRUPTIN_H
<> 144:ef7eb2e8f9f7 17 #define MBED_INTERRUPTIN_H
<> 144:ef7eb2e8f9f7 18
<> 144:ef7eb2e8f9f7 19 #include "platform.h"
<> 144:ef7eb2e8f9f7 20
<> 144:ef7eb2e8f9f7 21 #if DEVICE_INTERRUPTIN
<> 144:ef7eb2e8f9f7 22
<> 144:ef7eb2e8f9f7 23 #include "gpio_api.h"
<> 144:ef7eb2e8f9f7 24 #include "gpio_irq_api.h"
<> 144:ef7eb2e8f9f7 25 #include "Callback.h"
<> 144:ef7eb2e8f9f7 26 #include "critical.h"
<> 144:ef7eb2e8f9f7 27
<> 144:ef7eb2e8f9f7 28 namespace mbed {
<> 144:ef7eb2e8f9f7 29
<> 144:ef7eb2e8f9f7 30 /** A digital interrupt input, used to call a function on a rising or falling edge
<> 144:ef7eb2e8f9f7 31 *
<> 144:ef7eb2e8f9f7 32 * @Note Synchronization level: Interrupt safe
<> 144:ef7eb2e8f9f7 33 *
<> 144:ef7eb2e8f9f7 34 * Example:
<> 144:ef7eb2e8f9f7 35 * @code
<> 144:ef7eb2e8f9f7 36 * // Flash an LED while waiting for events
<> 144:ef7eb2e8f9f7 37 *
<> 144:ef7eb2e8f9f7 38 * #include "mbed.h"
<> 144:ef7eb2e8f9f7 39 *
<> 144:ef7eb2e8f9f7 40 * InterruptIn event(p16);
<> 144:ef7eb2e8f9f7 41 * DigitalOut led(LED1);
<> 144:ef7eb2e8f9f7 42 *
<> 144:ef7eb2e8f9f7 43 * void trigger() {
<> 144:ef7eb2e8f9f7 44 * printf("triggered!\n");
<> 144:ef7eb2e8f9f7 45 * }
<> 144:ef7eb2e8f9f7 46 *
<> 144:ef7eb2e8f9f7 47 * int main() {
<> 144:ef7eb2e8f9f7 48 * event.rise(&trigger);
<> 144:ef7eb2e8f9f7 49 * while(1) {
<> 144:ef7eb2e8f9f7 50 * led = !led;
<> 144:ef7eb2e8f9f7 51 * wait(0.25);
<> 144:ef7eb2e8f9f7 52 * }
<> 144:ef7eb2e8f9f7 53 * }
<> 144:ef7eb2e8f9f7 54 * @endcode
<> 144:ef7eb2e8f9f7 55 */
<> 144:ef7eb2e8f9f7 56 class InterruptIn {
<> 144:ef7eb2e8f9f7 57
<> 144:ef7eb2e8f9f7 58 public:
<> 144:ef7eb2e8f9f7 59
<> 144:ef7eb2e8f9f7 60 /** Create an InterruptIn connected to the specified pin
<> 144:ef7eb2e8f9f7 61 *
<> 144:ef7eb2e8f9f7 62 * @param pin InterruptIn pin to connect to
<> 144:ef7eb2e8f9f7 63 * @param name (optional) A string to identify the object
<> 144:ef7eb2e8f9f7 64 */
<> 144:ef7eb2e8f9f7 65 InterruptIn(PinName pin);
<> 144:ef7eb2e8f9f7 66 virtual ~InterruptIn();
<> 144:ef7eb2e8f9f7 67
<> 144:ef7eb2e8f9f7 68 /** Read the input, represented as 0 or 1 (int)
<> 144:ef7eb2e8f9f7 69 *
<> 144:ef7eb2e8f9f7 70 * @returns
<> 144:ef7eb2e8f9f7 71 * An integer representing the state of the input pin,
<> 144:ef7eb2e8f9f7 72 * 0 for logical 0, 1 for logical 1
<> 144:ef7eb2e8f9f7 73 */
<> 144:ef7eb2e8f9f7 74 int read();
<> 144:ef7eb2e8f9f7 75
<> 144:ef7eb2e8f9f7 76 /** An operator shorthand for read()
<> 144:ef7eb2e8f9f7 77 */
<> 144:ef7eb2e8f9f7 78 operator int();
<> 144:ef7eb2e8f9f7 79
<> 144:ef7eb2e8f9f7 80
<> 144:ef7eb2e8f9f7 81 /** Attach a function to call when a rising edge occurs on the input
<> 144:ef7eb2e8f9f7 82 *
<> 144:ef7eb2e8f9f7 83 * @param func A pointer to a void function, or 0 to set as none
<> 144:ef7eb2e8f9f7 84 */
<> 144:ef7eb2e8f9f7 85 void rise(Callback<void()> func);
<> 144:ef7eb2e8f9f7 86
<> 144:ef7eb2e8f9f7 87 /** Attach a member function to call when a rising edge occurs on the input
<> 144:ef7eb2e8f9f7 88 *
<> 144:ef7eb2e8f9f7 89 * @param obj pointer to the object to call the member function on
<> 144:ef7eb2e8f9f7 90 * @param method pointer to the member function to be called
<> 144:ef7eb2e8f9f7 91 */
<> 144:ef7eb2e8f9f7 92 template<typename T, typename M>
<> 144:ef7eb2e8f9f7 93 void rise(T *obj, M method) {
<> 144:ef7eb2e8f9f7 94 core_util_critical_section_enter();
<> 144:ef7eb2e8f9f7 95 rise(Callback<void()>(obj, method));
<> 144:ef7eb2e8f9f7 96 core_util_critical_section_exit();
<> 144:ef7eb2e8f9f7 97 }
<> 144:ef7eb2e8f9f7 98
<> 144:ef7eb2e8f9f7 99 /** Attach a function to call when a falling edge occurs on the input
<> 144:ef7eb2e8f9f7 100 *
<> 144:ef7eb2e8f9f7 101 * @param func A pointer to a void function, or 0 to set as none
<> 144:ef7eb2e8f9f7 102 */
<> 144:ef7eb2e8f9f7 103 void fall(Callback<void()> func);
<> 144:ef7eb2e8f9f7 104
<> 144:ef7eb2e8f9f7 105 /** Attach a member function to call when a falling edge occurs on the input
<> 144:ef7eb2e8f9f7 106 *
<> 144:ef7eb2e8f9f7 107 * @param obj pointer to the object to call the member function on
<> 144:ef7eb2e8f9f7 108 * @param method pointer to the member function to be called
<> 144:ef7eb2e8f9f7 109 */
<> 144:ef7eb2e8f9f7 110 template<typename T, typename M>
<> 144:ef7eb2e8f9f7 111 void fall(T *obj, M method) {
<> 144:ef7eb2e8f9f7 112 core_util_critical_section_enter();
<> 144:ef7eb2e8f9f7 113 fall(Callback<void()>(obj, method));
<> 144:ef7eb2e8f9f7 114 core_util_critical_section_exit();
<> 144:ef7eb2e8f9f7 115 }
<> 144:ef7eb2e8f9f7 116
<> 144:ef7eb2e8f9f7 117 /** Set the input pin mode
<> 144:ef7eb2e8f9f7 118 *
<> 144:ef7eb2e8f9f7 119 * @param mode PullUp, PullDown, PullNone
<> 144:ef7eb2e8f9f7 120 */
<> 144:ef7eb2e8f9f7 121 void mode(PinMode pull);
<> 144:ef7eb2e8f9f7 122
<> 144:ef7eb2e8f9f7 123 /** Enable IRQ. This method depends on hw implementation, might enable one
<> 144:ef7eb2e8f9f7 124 * port interrupts. For further information, check gpio_irq_enable().
<> 144:ef7eb2e8f9f7 125 */
<> 144:ef7eb2e8f9f7 126 void enable_irq();
<> 144:ef7eb2e8f9f7 127
<> 144:ef7eb2e8f9f7 128 /** Disable IRQ. This method depends on hw implementation, might disable one
<> 144:ef7eb2e8f9f7 129 * port interrupts. For further information, check gpio_irq_disable().
<> 144:ef7eb2e8f9f7 130 */
<> 144:ef7eb2e8f9f7 131 void disable_irq();
<> 144:ef7eb2e8f9f7 132
<> 144:ef7eb2e8f9f7 133 static void _irq_handler(uint32_t id, gpio_irq_event event);
<> 144:ef7eb2e8f9f7 134
<> 144:ef7eb2e8f9f7 135 protected:
<> 144:ef7eb2e8f9f7 136 gpio_t gpio;
<> 144:ef7eb2e8f9f7 137 gpio_irq_t gpio_irq;
<> 144:ef7eb2e8f9f7 138
<> 144:ef7eb2e8f9f7 139 Callback<void()> _rise;
<> 144:ef7eb2e8f9f7 140 Callback<void()> _fall;
<> 144:ef7eb2e8f9f7 141 };
<> 144:ef7eb2e8f9f7 142
<> 144:ef7eb2e8f9f7 143 } // namespace mbed
<> 144:ef7eb2e8f9f7 144
<> 144:ef7eb2e8f9f7 145 #endif
<> 144:ef7eb2e8f9f7 146
<> 144:ef7eb2e8f9f7 147 #endif