marcus chiou / mbed-src

mbed library sources

Fork of mbed-src 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 }