mbed library sources: Modified to operate FRDM-KL25Z at 48MHz from internal 32kHz oscillator (nothing else changed).
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InterruptIn.cpp
00001 /* mbed Microcontroller Library 00002 * Copyright (c) 2006-2013 ARM Limited 00003 * 00004 * Licensed under the Apache License, Version 2.0 (the "License"); 00005 * you may not use this file except in compliance with the License. 00006 * You may obtain a copy of the License at 00007 * 00008 * http://www.apache.org/licenses/LICENSE-2.0 00009 * 00010 * Unless required by applicable law or agreed to in writing, software 00011 * distributed under the License is distributed on an "AS IS" BASIS, 00012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00013 * See the License for the specific language governing permissions and 00014 * limitations under the License. 00015 */ 00016 #include "InterruptIn.h" 00017 00018 #if DEVICE_INTERRUPTIN 00019 00020 namespace mbed { 00021 00022 InterruptIn::InterruptIn(PinName pin) { 00023 gpio_irq_init(&gpio_irq, pin, (&InterruptIn::_irq_handler), (uint32_t)this); 00024 gpio_init(&gpio, pin, PIN_INPUT); 00025 } 00026 00027 InterruptIn::~InterruptIn() { 00028 gpio_irq_free(&gpio_irq); 00029 } 00030 00031 int InterruptIn::read() { 00032 return gpio_read(&gpio); 00033 } 00034 00035 void InterruptIn::mode(PinMode pull) { 00036 gpio_mode(&gpio, pull); 00037 } 00038 00039 pFunctionPointer_t InterruptIn::rise(void (*fptr)(void)) { 00040 pFunctionPointer_t pf = NULL; 00041 _rise.clear(); 00042 if (fptr) { 00043 pf = _rise.add(fptr); 00044 gpio_irq_set(&gpio_irq, IRQ_RISE, 1); 00045 } else { 00046 gpio_irq_set(&gpio_irq, IRQ_RISE, 0); 00047 } 00048 return pf; 00049 } 00050 00051 pFunctionPointer_t InterruptIn::rise_add_common(void (*fptr)(void), bool front) { 00052 if (NULL == fptr) 00053 return NULL; 00054 pFunctionPointer_t pf = front ? _rise.add_front(fptr) : _rise.add(fptr); 00055 gpio_irq_set(&gpio_irq, IRQ_RISE, 1); 00056 return pf; 00057 } 00058 00059 bool InterruptIn::rise_remove(pFunctionPointer_t pf) { 00060 bool res = _rise.remove(pf); 00061 if (res && _rise.size() == 0) 00062 gpio_irq_set(&gpio_irq, IRQ_RISE, 0); 00063 return res; 00064 } 00065 00066 pFunctionPointer_t InterruptIn::fall(void (*fptr)(void)) { 00067 pFunctionPointer_t pf = NULL; 00068 _fall.clear(); 00069 if (fptr) { 00070 pf = _fall.add(fptr); 00071 gpio_irq_set(&gpio_irq, IRQ_FALL, 1); 00072 } else { 00073 gpio_irq_set(&gpio_irq, IRQ_FALL, 0); 00074 } 00075 return pf; 00076 } 00077 00078 pFunctionPointer_t InterruptIn::fall_add_common(void (*fptr)(void), bool front) { 00079 if (NULL == fptr) 00080 return NULL; 00081 pFunctionPointer_t pf = front ? _fall.add_front(fptr) : _fall.add(fptr); 00082 gpio_irq_set(&gpio_irq, IRQ_FALL, 1); 00083 return pf; 00084 } 00085 00086 bool InterruptIn::fall_remove(pFunctionPointer_t pf) { 00087 bool res = _fall.remove(pf); 00088 if (res && _fall.size() == 0) 00089 gpio_irq_set(&gpio_irq, IRQ_FALL, 0); 00090 return res; 00091 } 00092 00093 void InterruptIn::_irq_handler(uint32_t id, gpio_irq_event event) { 00094 InterruptIn *handler = (InterruptIn*)id; 00095 switch (event) { 00096 case IRQ_RISE: handler->_rise.call(); break; 00097 case IRQ_FALL: handler->_fall.call(); break; 00098 case IRQ_NONE: break; 00099 } 00100 } 00101 00102 #ifdef MBED_OPERATORS 00103 InterruptIn::operator int() { 00104 return read(); 00105 } 00106 #endif 00107 00108 } // namespace mbed 00109 00110 #endif
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