Andrew SaLoutos / mbed-dev-STM-lean

From Ben Katz mbed-dev library. Removed unnecessary target files to reduce the overall size by a factor of 10 to make it easier to import into the online IDE.

Dependents:   motor_driver motor_driver_screaming_fix

drivers/InterruptIn.cpp@0:083111ae2a11, 2020-11-26 (annotated)

Committer:
saloutos
Date:
Thu Nov 26 04:08:56 2020 +0000
Revision:
0:083111ae2a11
first commit of leaned mbed dev lib

Who changed what in which revision?

UserRevisionLine numberNew contents of line
saloutos 0:083111ae2a11 1 /* mbed Microcontroller Library
saloutos 0:083111ae2a11 2 * Copyright (c) 2006-2013 ARM Limited
saloutos 0:083111ae2a11 3 *
saloutos 0:083111ae2a11 4 * Licensed under the Apache License, Version 2.0 (the "License");
saloutos 0:083111ae2a11 5 * you may not use this file except in compliance with the License.
saloutos 0:083111ae2a11 6 * You may obtain a copy of the License at
saloutos 0:083111ae2a11 7 *
saloutos 0:083111ae2a11 8 * http://www.apache.org/licenses/LICENSE-2.0
saloutos 0:083111ae2a11 9 *
saloutos 0:083111ae2a11 10 * Unless required by applicable law or agreed to in writing, software
saloutos 0:083111ae2a11 11 * distributed under the License is distributed on an "AS IS" BASIS,
saloutos 0:083111ae2a11 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
saloutos 0:083111ae2a11 13 * See the License for the specific language governing permissions and
saloutos 0:083111ae2a11 14 * limitations under the License.
saloutos 0:083111ae2a11 15 */
saloutos 0:083111ae2a11 16 #include "drivers/InterruptIn.h"
saloutos 0:083111ae2a11 17
saloutos 0:083111ae2a11 18 #if DEVICE_INTERRUPTIN
saloutos 0:083111ae2a11 19
saloutos 0:083111ae2a11 20 namespace mbed {
saloutos 0:083111ae2a11 21
saloutos 0:083111ae2a11 22 InterruptIn::InterruptIn(PinName pin) : gpio(),
saloutos 0:083111ae2a11 23 gpio_irq(),
saloutos 0:083111ae2a11 24 _rise(NULL),
saloutos 0:083111ae2a11 25 _fall(NULL) {
saloutos 0:083111ae2a11 26 // No lock needed in the constructor
saloutos 0:083111ae2a11 27
saloutos 0:083111ae2a11 28 gpio_irq_init(&gpio_irq, pin, (&InterruptIn::_irq_handler), (uint32_t)this);
saloutos 0:083111ae2a11 29 gpio_init_in(&gpio, pin);
saloutos 0:083111ae2a11 30 }
saloutos 0:083111ae2a11 31
saloutos 0:083111ae2a11 32 InterruptIn::~InterruptIn() {
saloutos 0:083111ae2a11 33 // No lock needed in the destructor
saloutos 0:083111ae2a11 34 gpio_irq_free(&gpio_irq);
saloutos 0:083111ae2a11 35 }
saloutos 0:083111ae2a11 36
saloutos 0:083111ae2a11 37 int InterruptIn::read() {
saloutos 0:083111ae2a11 38 // Read only
saloutos 0:083111ae2a11 39 return gpio_read(&gpio);
saloutos 0:083111ae2a11 40 }
saloutos 0:083111ae2a11 41
saloutos 0:083111ae2a11 42 void InterruptIn::mode(PinMode pull) {
saloutos 0:083111ae2a11 43 core_util_critical_section_enter();
saloutos 0:083111ae2a11 44 gpio_mode(&gpio, pull);
saloutos 0:083111ae2a11 45 core_util_critical_section_exit();
saloutos 0:083111ae2a11 46 }
saloutos 0:083111ae2a11 47
saloutos 0:083111ae2a11 48 void InterruptIn::rise(Callback<void()> func) {
saloutos 0:083111ae2a11 49 core_util_critical_section_enter();
saloutos 0:083111ae2a11 50 if (func) {
saloutos 0:083111ae2a11 51 _rise = func;
saloutos 0:083111ae2a11 52 gpio_irq_set(&gpio_irq, IRQ_RISE, 1);
saloutos 0:083111ae2a11 53 } else {
saloutos 0:083111ae2a11 54 _rise = NULL;
saloutos 0:083111ae2a11 55 gpio_irq_set(&gpio_irq, IRQ_RISE, 0);
saloutos 0:083111ae2a11 56 }
saloutos 0:083111ae2a11 57 core_util_critical_section_exit();
saloutos 0:083111ae2a11 58 }
saloutos 0:083111ae2a11 59
saloutos 0:083111ae2a11 60 void InterruptIn::fall(Callback<void()> func) {
saloutos 0:083111ae2a11 61 core_util_critical_section_enter();
saloutos 0:083111ae2a11 62 if (func) {
saloutos 0:083111ae2a11 63 _fall = func;
saloutos 0:083111ae2a11 64 gpio_irq_set(&gpio_irq, IRQ_FALL, 1);
saloutos 0:083111ae2a11 65 } else {
saloutos 0:083111ae2a11 66 _fall = NULL;
saloutos 0:083111ae2a11 67 gpio_irq_set(&gpio_irq, IRQ_FALL, 0);
saloutos 0:083111ae2a11 68 }
saloutos 0:083111ae2a11 69 core_util_critical_section_exit();
saloutos 0:083111ae2a11 70 }
saloutos 0:083111ae2a11 71
saloutos 0:083111ae2a11 72 void InterruptIn::_irq_handler(uint32_t id, gpio_irq_event event) {
saloutos 0:083111ae2a11 73 InterruptIn *handler = (InterruptIn*)id;
saloutos 0:083111ae2a11 74 switch (event) {
saloutos 0:083111ae2a11 75 case IRQ_RISE:
saloutos 0:083111ae2a11 76 if (handler->_rise) {
saloutos 0:083111ae2a11 77 handler->_rise();
saloutos 0:083111ae2a11 78 }
saloutos 0:083111ae2a11 79 break;
saloutos 0:083111ae2a11 80 case IRQ_FALL:
saloutos 0:083111ae2a11 81 if (handler->_fall) {
saloutos 0:083111ae2a11 82 handler->_fall();
saloutos 0:083111ae2a11 83 }
saloutos 0:083111ae2a11 84 break;
saloutos 0:083111ae2a11 85 case IRQ_NONE: break;
saloutos 0:083111ae2a11 86 }
saloutos 0:083111ae2a11 87 }
saloutos 0:083111ae2a11 88
saloutos 0:083111ae2a11 89 void InterruptIn::enable_irq() {
saloutos 0:083111ae2a11 90 core_util_critical_section_enter();
saloutos 0:083111ae2a11 91 gpio_irq_enable(&gpio_irq);
saloutos 0:083111ae2a11 92 core_util_critical_section_exit();
saloutos 0:083111ae2a11 93 }
saloutos 0:083111ae2a11 94
saloutos 0:083111ae2a11 95 void InterruptIn::disable_irq() {
saloutos 0:083111ae2a11 96 core_util_critical_section_enter();
saloutos 0:083111ae2a11 97 gpio_irq_disable(&gpio_irq);
saloutos 0:083111ae2a11 98 core_util_critical_section_exit();
saloutos 0:083111ae2a11 99 }
saloutos 0:083111ae2a11 100
saloutos 0:083111ae2a11 101 InterruptIn::operator int() {
saloutos 0:083111ae2a11 102 // Underlying call is atomic
saloutos 0:083111ae2a11 103 return read();
saloutos 0:083111ae2a11 104 }
saloutos 0:083111ae2a11 105
saloutos 0:083111ae2a11 106 } // namespace mbed
saloutos 0:083111ae2a11 107
saloutos 0:083111ae2a11 108 #endif