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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

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The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

targets/hal/TARGET_Atmel/TARGET_SAM21/gpio_irq_api.c@592:a274ee790e56, 2015-07-17 (annotated)

Committer:
mbed_official
Date:
Fri Jul 17 09:15:10 2015 +0100
Revision:
592:a274ee790e56
Synchronized with git revision e7144f83a8d75df80c4877936b6ffe552b0be9e6



Full URL: https://github.com/mbedmicro/mbed/commit/e7144f83a8d75df80c4877936b6ffe552b0be9e6/



More API implementation for SAMR21

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 592:a274ee790e56 1 /* mbed Microcontroller Library
mbed_official 592:a274ee790e56 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 592:a274ee790e56 3 *
mbed_official 592:a274ee790e56 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 592:a274ee790e56 5 * you may not use this file except in compliance with the License.
mbed_official 592:a274ee790e56 6 * You may obtain a copy of the License at
mbed_official 592:a274ee790e56 7 *
mbed_official 592:a274ee790e56 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 592:a274ee790e56 9 *
mbed_official 592:a274ee790e56 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 592:a274ee790e56 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 592:a274ee790e56 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 592:a274ee790e56 13 * See the License for the specific language governing permissions and
mbed_official 592:a274ee790e56 14 * limitations under the License.
mbed_official 592:a274ee790e56 15 */
mbed_official 592:a274ee790e56 16 #include <stddef.h>
mbed_official 592:a274ee790e56 17 #include "cmsis.h"
mbed_official 592:a274ee790e56 18
mbed_official 592:a274ee790e56 19 #include "gpio_irq_api.h"
mbed_official 592:a274ee790e56 20 #include "gpio_api.h"
mbed_official 592:a274ee790e56 21 #include "mbed_error.h"
mbed_official 592:a274ee790e56 22 #include "extint.h"
mbed_official 592:a274ee790e56 23 #include "pinmap.h"
mbed_official 592:a274ee790e56 24 #include "PeripheralPins.h"
mbed_official 592:a274ee790e56 25 #include "port.h"
mbed_official 592:a274ee790e56 26
mbed_official 592:a274ee790e56 27 #define IRQ_RISE_POSITION 1
mbed_official 592:a274ee790e56 28 #define IRQ_FALL_POSITION 2
mbed_official 592:a274ee790e56 29 #define CHANNEL_NUM 16
mbed_official 592:a274ee790e56 30 #define pEXT_CONF(obj) (obj->config_extint_chan)
mbed_official 592:a274ee790e56 31 static uint32_t channel_ids[CHANNEL_NUM] = {0};
mbed_official 592:a274ee790e56 32 static gpio_irq_handler irq_handler;
mbed_official 592:a274ee790e56 33 uint8_t ext_int_pins[EIC_NUMBER_OF_INTERRUPTS] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
mbed_official 592:a274ee790e56 34
mbed_official 592:a274ee790e56 35 void gpio_irq(void)
mbed_official 592:a274ee790e56 36 {
mbed_official 592:a274ee790e56 37 uint32_t current_channel;
mbed_official 592:a274ee790e56 38 uint32_t mask;
mbed_official 592:a274ee790e56 39 gpio_irq_event event;
mbed_official 592:a274ee790e56 40 PortGroup *port_base;
mbed_official 592:a274ee790e56 41
mbed_official 592:a274ee790e56 42 for (current_channel = 0; current_channel < EIC_NUMBER_OF_INTERRUPTS ; current_channel++) {
mbed_official 592:a274ee790e56 43 if (extint_chan_is_detected(current_channel)) {
mbed_official 592:a274ee790e56 44 extint_chan_clear_detected(current_channel);
mbed_official 592:a274ee790e56 45 port_base = (PortGroup*)port_get_group_from_gpio_pin(ext_int_pins[current_channel]);
mbed_official 592:a274ee790e56 46 mask = gpio_set(ext_int_pins[current_channel]);
mbed_official 592:a274ee790e56 47 if ((port_base->IN.reg & mask) != 0) {
mbed_official 592:a274ee790e56 48 event = IRQ_RISE;
mbed_official 592:a274ee790e56 49 } else {
mbed_official 592:a274ee790e56 50 event = IRQ_FALL;
mbed_official 592:a274ee790e56 51 }
mbed_official 592:a274ee790e56 52 irq_handler(channel_ids[current_channel], event);
mbed_official 592:a274ee790e56 53 }
mbed_official 592:a274ee790e56 54 }
mbed_official 592:a274ee790e56 55 }
mbed_official 592:a274ee790e56 56
mbed_official 592:a274ee790e56 57 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id)
mbed_official 592:a274ee790e56 58 {
mbed_official 592:a274ee790e56 59 MBED_ASSERT(obj);
mbed_official 592:a274ee790e56 60 if (pin == NC)
mbed_official 592:a274ee790e56 61 return -1;
mbed_official 592:a274ee790e56 62
mbed_official 592:a274ee790e56 63 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 592:a274ee790e56 64 uint32_t vector = 0;
mbed_official 592:a274ee790e56 65 int int_channel = 0;
mbed_official 592:a274ee790e56 66 irq_handler = handler; // assuming the usage of these apis in mbed layer only
mbed_official 592:a274ee790e56 67
mbed_official 592:a274ee790e56 68 obj->pin = pin;
mbed_official 592:a274ee790e56 69
mbed_official 592:a274ee790e56 70 extint_chan_get_config_defaults(&pEXT_CONF(obj));
mbed_official 592:a274ee790e56 71 pEXT_CONF(obj).gpio_pin = (uint32_t)pin;
mbed_official 592:a274ee790e56 72 pEXT_CONF(obj).gpio_pin_mux = 0; // mux setting for ext int is 0
mbed_official 592:a274ee790e56 73 pEXT_CONF(obj).gpio_pin_pull = EXTINT_PULL_UP;
mbed_official 592:a274ee790e56 74 pEXT_CONF(obj).detection_criteria = EXTINT_DETECT_NONE;
mbed_official 592:a274ee790e56 75
mbed_official 592:a274ee790e56 76 int_channel = pinmap_find_peripheral(pin, PinMap_EXTINT);
mbed_official 592:a274ee790e56 77 if (int_channel == NC) {
mbed_official 592:a274ee790e56 78 return -1;
mbed_official 592:a274ee790e56 79 }
mbed_official 592:a274ee790e56 80 extint_chan_set_config(int_channel, &pEXT_CONF(obj));
mbed_official 592:a274ee790e56 81 ext_int_pins[int_channel] = pin;
mbed_official 592:a274ee790e56 82
mbed_official 592:a274ee790e56 83 irq_n = EIC_IRQn;
mbed_official 592:a274ee790e56 84 vector = (uint32_t)gpio_irq;
mbed_official 592:a274ee790e56 85 NVIC_SetVector(irq_n, vector);
mbed_official 592:a274ee790e56 86 NVIC_EnableIRQ(irq_n);
mbed_official 592:a274ee790e56 87 obj->ch = int_channel;
mbed_official 592:a274ee790e56 88 channel_ids[int_channel] = id;
mbed_official 592:a274ee790e56 89
mbed_official 592:a274ee790e56 90 return 0;
mbed_official 592:a274ee790e56 91 }
mbed_official 592:a274ee790e56 92
mbed_official 592:a274ee790e56 93 void gpio_irq_free(gpio_irq_t *obj)
mbed_official 592:a274ee790e56 94 {
mbed_official 592:a274ee790e56 95 MBED_ASSERT(obj);
mbed_official 592:a274ee790e56 96 Eic *const eic = _extint_get_eic_from_channel(obj->ch);
mbed_official 592:a274ee790e56 97 channel_ids[obj->ch] = 0;
mbed_official 592:a274ee790e56 98 eic->INTENCLR.reg = (1UL << obj->ch);
mbed_official 592:a274ee790e56 99 }
mbed_official 592:a274ee790e56 100
mbed_official 592:a274ee790e56 101 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable)
mbed_official 592:a274ee790e56 102 {
mbed_official 592:a274ee790e56 103 MBED_ASSERT(obj);
mbed_official 592:a274ee790e56 104 Eic *const eic = _extint_get_eic_from_channel(obj->ch);
mbed_official 592:a274ee790e56 105 if (enable) {
mbed_official 592:a274ee790e56 106 if (event == IRQ_RISE) {
mbed_official 592:a274ee790e56 107 obj->irqmask |= IRQ_RISE_POSITION;
mbed_official 592:a274ee790e56 108 } else if (event == IRQ_FALL) {
mbed_official 592:a274ee790e56 109 obj->irqmask |= IRQ_FALL_POSITION;
mbed_official 592:a274ee790e56 110 }
mbed_official 592:a274ee790e56 111 eic->INTENSET.reg = (1UL << obj->ch);
mbed_official 592:a274ee790e56 112 } else {
mbed_official 592:a274ee790e56 113 if (event == IRQ_RISE) {
mbed_official 592:a274ee790e56 114 obj->irqmask &= ~IRQ_RISE_POSITION;
mbed_official 592:a274ee790e56 115 } else if (event == IRQ_FALL) {
mbed_official 592:a274ee790e56 116 obj->irqmask &= ~IRQ_FALL_POSITION;
mbed_official 592:a274ee790e56 117 }
mbed_official 592:a274ee790e56 118 }
mbed_official 592:a274ee790e56 119
mbed_official 592:a274ee790e56 120 if (obj->irqmask == (IRQ_RISE_POSITION | IRQ_FALL_POSITION)) {
mbed_official 592:a274ee790e56 121 pEXT_CONF(obj).detection_criteria = EXTINT_DETECT_BOTH;
mbed_official 592:a274ee790e56 122 } else if (obj->irqmask == IRQ_RISE_POSITION) {
mbed_official 592:a274ee790e56 123 pEXT_CONF(obj).detection_criteria = EXTINT_DETECT_RISING;
mbed_official 592:a274ee790e56 124 } else if (obj->irqmask == IRQ_FALL_POSITION) {
mbed_official 592:a274ee790e56 125 pEXT_CONF(obj).detection_criteria = EXTINT_DETECT_FALLING;
mbed_official 592:a274ee790e56 126 } else {
mbed_official 592:a274ee790e56 127 pEXT_CONF(obj).detection_criteria = EXTINT_DETECT_NONE;
mbed_official 592:a274ee790e56 128 eic->INTENCLR.reg = (1UL << obj->ch);
mbed_official 592:a274ee790e56 129 }
mbed_official 592:a274ee790e56 130
mbed_official 592:a274ee790e56 131 extint_chan_set_config(obj->ch, &pEXT_CONF(obj));
mbed_official 592:a274ee790e56 132 }
mbed_official 592:a274ee790e56 133
mbed_official 592:a274ee790e56 134 void gpio_irq_enable(gpio_irq_t *obj)
mbed_official 592:a274ee790e56 135 {
mbed_official 592:a274ee790e56 136 MBED_ASSERT(obj);
mbed_official 592:a274ee790e56 137 Eic *const eic = _extint_get_eic_from_channel(obj->ch);
mbed_official 592:a274ee790e56 138 NVIC_EnableIRQ(EIC_IRQn);
mbed_official 592:a274ee790e56 139 eic->INTENSET.reg = (1UL << obj->ch);
mbed_official 592:a274ee790e56 140 }
mbed_official 592:a274ee790e56 141
mbed_official 592:a274ee790e56 142 void gpio_irq_disable(gpio_irq_t *obj)
mbed_official 592:a274ee790e56 143 {
mbed_official 592:a274ee790e56 144 MBED_ASSERT(obj);
mbed_official 592:a274ee790e56 145 Eic *const eic = _extint_get_eic_from_channel(obj->ch);
mbed_official 592:a274ee790e56 146 eic->INTENCLR.reg = (1UL << obj->ch);
mbed_official 592:a274ee790e56 147 if (eic->INTENSET.reg == 0) {
mbed_official 592:a274ee790e56 148 NVIC_DisableIRQ(EIC_IRQn);
mbed_official 592:a274ee790e56 149 }
mbed_official 592:a274ee790e56 150 }