Fawwaz Nadzmy / mbed-STM

mbed library sources. Supersedes mbed-src.

Fork of mbed-dev by mbed official

targets/TARGET_Atmel/TARGET_SAM_CortexM0P/gpio_irq_api.c@153:9398a535854b, 2016-12-22 (annotated)

Committer:
fwndz
Date:
Thu Dec 22 05:12:40 2016 +0000
Revision:
153:9398a535854b
Parent:
149:156823d33999 
device target maximize

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 15:a81a8d6c1dfe 1 /* mbed Microcontroller Library
mbed_official 15:a81a8d6c1dfe 2 * Copyright (c) 2006-2015 ARM Limited
mbed_official 15:a81a8d6c1dfe 3 *
mbed_official 15:a81a8d6c1dfe 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 15:a81a8d6c1dfe 5 * you may not use this file except in compliance with the License.
mbed_official 15:a81a8d6c1dfe 6 * You may obtain a copy of the License at
mbed_official 15:a81a8d6c1dfe 7 *
mbed_official 15:a81a8d6c1dfe 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 15:a81a8d6c1dfe 9 *
mbed_official 15:a81a8d6c1dfe 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 15:a81a8d6c1dfe 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 15:a81a8d6c1dfe 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 15:a81a8d6c1dfe 13 * See the License for the specific language governing permissions and
mbed_official 15:a81a8d6c1dfe 14 * limitations under the License.
mbed_official 15:a81a8d6c1dfe 15 */
mbed_official 15:a81a8d6c1dfe 16 #include <stddef.h>
mbed_official 15:a81a8d6c1dfe 17 #include "cmsis.h"
mbed_official 15:a81a8d6c1dfe 18
mbed_official 15:a81a8d6c1dfe 19 #include "gpio_irq_api.h"
mbed_official 15:a81a8d6c1dfe 20 #include "gpio_api.h"
mbed_official 15:a81a8d6c1dfe 21 #include "mbed_error.h"
mbed_official 15:a81a8d6c1dfe 22 #include "extint.h"
mbed_official 15:a81a8d6c1dfe 23 #include "pinmap.h"
mbed_official 15:a81a8d6c1dfe 24 #include "PeripheralPins.h"
mbed_official 15:a81a8d6c1dfe 25 #include "port.h"
mbed_official 15:a81a8d6c1dfe 26
mbed_official 15:a81a8d6c1dfe 27 #define IRQ_RISE_POSITION 1
mbed_official 15:a81a8d6c1dfe 28 #define IRQ_FALL_POSITION 2
mbed_official 15:a81a8d6c1dfe 29 #define CHANNEL_NUM 16
mbed_official 15:a81a8d6c1dfe 30 #define pEXT_CONF(obj) (obj->config_extint_chan)
mbed_official 15:a81a8d6c1dfe 31 static uint32_t channel_ids[CHANNEL_NUM] = {0};
mbed_official 15:a81a8d6c1dfe 32 static gpio_irq_handler irq_handler;
mbed_official 15:a81a8d6c1dfe 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 15:a81a8d6c1dfe 34
mbed_official 15:a81a8d6c1dfe 35 void gpio_irq(void)
mbed_official 15:a81a8d6c1dfe 36 {
mbed_official 15:a81a8d6c1dfe 37 uint32_t current_channel;
mbed_official 15:a81a8d6c1dfe 38 uint32_t mask;
mbed_official 15:a81a8d6c1dfe 39 gpio_irq_event event;
mbed_official 15:a81a8d6c1dfe 40 PortGroup *port_base;
mbed_official 15:a81a8d6c1dfe 41
mbed_official 15:a81a8d6c1dfe 42 for (current_channel = 0; current_channel < EIC_NUMBER_OF_INTERRUPTS ; current_channel++) {
mbed_official 15:a81a8d6c1dfe 43 if (extint_chan_is_detected(current_channel)) {
mbed_official 15:a81a8d6c1dfe 44 extint_chan_clear_detected(current_channel);
mbed_official 15:a81a8d6c1dfe 45 port_base = (PortGroup*)port_get_group_from_gpio_pin(ext_int_pins[current_channel]);
mbed_official 64:41a834223ea3 46 mask = gpio_set((PinName)ext_int_pins[current_channel]);
mbed_official 15:a81a8d6c1dfe 47 if ((port_base->IN.reg & mask) != 0) {
mbed_official 15:a81a8d6c1dfe 48 event = IRQ_RISE;
mbed_official 15:a81a8d6c1dfe 49 } else {
mbed_official 15:a81a8d6c1dfe 50 event = IRQ_FALL;
mbed_official 15:a81a8d6c1dfe 51 }
mbed_official 15:a81a8d6c1dfe 52 if(irq_handler) {
mbed_official 15:a81a8d6c1dfe 53 irq_handler(channel_ids[current_channel], event);
mbed_official 15:a81a8d6c1dfe 54 }
mbed_official 15:a81a8d6c1dfe 55 }
mbed_official 15:a81a8d6c1dfe 56 }
mbed_official 15:a81a8d6c1dfe 57 }
mbed_official 15:a81a8d6c1dfe 58
mbed_official 15:a81a8d6c1dfe 59 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id)
mbed_official 15:a81a8d6c1dfe 60 {
mbed_official 15:a81a8d6c1dfe 61 MBED_ASSERT(obj);
mbed_official 15:a81a8d6c1dfe 62 if (pin == NC)
mbed_official 15:a81a8d6c1dfe 63 return -1;
mbed_official 15:a81a8d6c1dfe 64
mbed_official 15:a81a8d6c1dfe 65 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 15:a81a8d6c1dfe 66 uint32_t vector = 0;
mbed_official 15:a81a8d6c1dfe 67 int int_channel = 0;
mbed_official 15:a81a8d6c1dfe 68 irq_handler = handler; // assuming the usage of these apis in mbed layer only
mbed_official 15:a81a8d6c1dfe 69
mbed_official 15:a81a8d6c1dfe 70 obj->pin = pin;
mbed_official 15:a81a8d6c1dfe 71
mbed_official 15:a81a8d6c1dfe 72 extint_chan_get_config_defaults(&pEXT_CONF(obj));
mbed_official 15:a81a8d6c1dfe 73 pEXT_CONF(obj).gpio_pin = (uint32_t)pin;
mbed_official 15:a81a8d6c1dfe 74 pEXT_CONF(obj).gpio_pin_mux = 0; // mux setting for ext int is 0
mbed_official 15:a81a8d6c1dfe 75 pEXT_CONF(obj).gpio_pin_pull = EXTINT_PULL_UP;
mbed_official 15:a81a8d6c1dfe 76 pEXT_CONF(obj).detection_criteria = EXTINT_DETECT_NONE;
mbed_official 15:a81a8d6c1dfe 77
mbed_official 15:a81a8d6c1dfe 78 int_channel = pinmap_find_peripheral(pin, PinMap_EXTINT);
mbed_official 15:a81a8d6c1dfe 79 if (int_channel == NC) {
mbed_official 15:a81a8d6c1dfe 80 return -1;
mbed_official 15:a81a8d6c1dfe 81 }
mbed_official 15:a81a8d6c1dfe 82 extint_chan_set_config(int_channel, &pEXT_CONF(obj));
mbed_official 15:a81a8d6c1dfe 83 ext_int_pins[int_channel] = pin;
mbed_official 15:a81a8d6c1dfe 84
mbed_official 15:a81a8d6c1dfe 85 irq_n = EIC_IRQn;
mbed_official 15:a81a8d6c1dfe 86 vector = (uint32_t)gpio_irq;
mbed_official 15:a81a8d6c1dfe 87 NVIC_SetVector(irq_n, vector);
mbed_official 15:a81a8d6c1dfe 88 NVIC_EnableIRQ(irq_n);
mbed_official 15:a81a8d6c1dfe 89 obj->ch = int_channel;
mbed_official 15:a81a8d6c1dfe 90 channel_ids[int_channel] = id;
mbed_official 15:a81a8d6c1dfe 91 obj->irqmask = 0;
mbed_official 15:a81a8d6c1dfe 92
mbed_official 15:a81a8d6c1dfe 93 return 0;
mbed_official 15:a81a8d6c1dfe 94 }
mbed_official 15:a81a8d6c1dfe 95
mbed_official 15:a81a8d6c1dfe 96 void gpio_irq_free(gpio_irq_t *obj)
mbed_official 15:a81a8d6c1dfe 97 {
mbed_official 15:a81a8d6c1dfe 98 MBED_ASSERT(obj);
mbed_official 15:a81a8d6c1dfe 99 Eic *const eic = _extint_get_eic_from_channel(obj->ch);
mbed_official 15:a81a8d6c1dfe 100 channel_ids[obj->ch] = 0;
mbed_official 15:a81a8d6c1dfe 101 eic->INTENCLR.reg = (1UL << obj->ch);
mbed_official 15:a81a8d6c1dfe 102 }
mbed_official 15:a81a8d6c1dfe 103
mbed_official 15:a81a8d6c1dfe 104 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable)
mbed_official 15:a81a8d6c1dfe 105 {
mbed_official 15:a81a8d6c1dfe 106 MBED_ASSERT(obj);
mbed_official 15:a81a8d6c1dfe 107 Eic *const eic = _extint_get_eic_from_channel(obj->ch);
mbed_official 15:a81a8d6c1dfe 108 if (enable) {
mbed_official 15:a81a8d6c1dfe 109 if (event == IRQ_RISE) {
mbed_official 15:a81a8d6c1dfe 110 obj->irqmask |= IRQ_RISE_POSITION;
mbed_official 15:a81a8d6c1dfe 111 } else if (event == IRQ_FALL) {
mbed_official 15:a81a8d6c1dfe 112 obj->irqmask |= IRQ_FALL_POSITION;
mbed_official 15:a81a8d6c1dfe 113 }
mbed_official 15:a81a8d6c1dfe 114 eic->INTENSET.reg = (1UL << obj->ch);
mbed_official 15:a81a8d6c1dfe 115 } else {
mbed_official 15:a81a8d6c1dfe 116 if (event == IRQ_RISE) {
mbed_official 15:a81a8d6c1dfe 117 obj->irqmask &= ~IRQ_RISE_POSITION;
mbed_official 15:a81a8d6c1dfe 118 } else if (event == IRQ_FALL) {
mbed_official 15:a81a8d6c1dfe 119 obj->irqmask &= ~IRQ_FALL_POSITION;
mbed_official 15:a81a8d6c1dfe 120 }
mbed_official 15:a81a8d6c1dfe 121 }
mbed_official 15:a81a8d6c1dfe 122
mbed_official 15:a81a8d6c1dfe 123 if (obj->irqmask == (IRQ_RISE_POSITION | IRQ_FALL_POSITION)) {
mbed_official 15:a81a8d6c1dfe 124 pEXT_CONF(obj).detection_criteria = EXTINT_DETECT_BOTH;
mbed_official 15:a81a8d6c1dfe 125 } else if (obj->irqmask == IRQ_RISE_POSITION) {
mbed_official 15:a81a8d6c1dfe 126 pEXT_CONF(obj).detection_criteria = EXTINT_DETECT_RISING;
mbed_official 15:a81a8d6c1dfe 127 } else if (obj->irqmask == IRQ_FALL_POSITION) {
mbed_official 15:a81a8d6c1dfe 128 pEXT_CONF(obj).detection_criteria = EXTINT_DETECT_FALLING;
mbed_official 15:a81a8d6c1dfe 129 } else {
mbed_official 15:a81a8d6c1dfe 130 pEXT_CONF(obj).detection_criteria = EXTINT_DETECT_NONE;
mbed_official 15:a81a8d6c1dfe 131 eic->INTENCLR.reg = (1UL << obj->ch);
mbed_official 15:a81a8d6c1dfe 132 }
mbed_official 15:a81a8d6c1dfe 133
mbed_official 15:a81a8d6c1dfe 134 extint_chan_set_config(obj->ch, &pEXT_CONF(obj));
mbed_official 15:a81a8d6c1dfe 135 }
mbed_official 15:a81a8d6c1dfe 136
mbed_official 15:a81a8d6c1dfe 137 void gpio_irq_enable(gpio_irq_t *obj)
mbed_official 15:a81a8d6c1dfe 138 {
mbed_official 15:a81a8d6c1dfe 139 MBED_ASSERT(obj);
mbed_official 15:a81a8d6c1dfe 140 Eic *const eic = _extint_get_eic_from_channel(obj->ch);
mbed_official 15:a81a8d6c1dfe 141 NVIC_EnableIRQ(EIC_IRQn);
mbed_official 15:a81a8d6c1dfe 142 eic->INTENSET.reg = (1UL << obj->ch);
mbed_official 15:a81a8d6c1dfe 143 }
mbed_official 15:a81a8d6c1dfe 144
mbed_official 15:a81a8d6c1dfe 145 void gpio_irq_disable(gpio_irq_t *obj)
mbed_official 15:a81a8d6c1dfe 146 {
mbed_official 15:a81a8d6c1dfe 147 MBED_ASSERT(obj);
mbed_official 15:a81a8d6c1dfe 148 Eic *const eic = _extint_get_eic_from_channel(obj->ch);
mbed_official 15:a81a8d6c1dfe 149 eic->INTENCLR.reg = (1UL << obj->ch);
mbed_official 15:a81a8d6c1dfe 150 if (eic->INTENSET.reg == 0) {
mbed_official 15:a81a8d6c1dfe 151 NVIC_DisableIRQ(EIC_IRQn);
mbed_official 15:a81a8d6c1dfe 152 }
mbed_official 15:a81a8d6c1dfe 153 }