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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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_Freescale/TARGET_KLXX/TARGET_KL05Z/gpio_irq_api.c@82:0b31dbcd4769, 2014-01-31 (annotated)

Committer:
mbed_official
Date:
Fri Jan 31 10:00:06 2014 +0000
Revision:
82:0b31dbcd4769
Child:
86:26fc69fd3b6c
Synchronized with git revision 74409cbd593d1daab530a57baaa563f30b04b018



Full URL: https://github.com/mbedmicro/mbed/commit/74409cbd593d1daab530a57baaa563f30b04b018/

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 82:0b31dbcd4769 1 /* mbed Microcontroller Library
mbed_official 82:0b31dbcd4769 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 82:0b31dbcd4769 3 *
mbed_official 82:0b31dbcd4769 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 82:0b31dbcd4769 5 * you may not use this file except in compliance with the License.
mbed_official 82:0b31dbcd4769 6 * You may obtain a copy of the License at
mbed_official 82:0b31dbcd4769 7 *
mbed_official 82:0b31dbcd4769 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 82:0b31dbcd4769 9 *
mbed_official 82:0b31dbcd4769 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 82:0b31dbcd4769 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 82:0b31dbcd4769 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 82:0b31dbcd4769 13 * See the License for the specific language governing permissions and
mbed_official 82:0b31dbcd4769 14 * limitations under the License.
mbed_official 82:0b31dbcd4769 15 */
mbed_official 82:0b31dbcd4769 16 #include <stddef.h>
mbed_official 82:0b31dbcd4769 17 #include "cmsis.h"
mbed_official 82:0b31dbcd4769 18
mbed_official 82:0b31dbcd4769 19 #include "gpio_irq_api.h"
mbed_official 82:0b31dbcd4769 20 #include "error.h"
mbed_official 82:0b31dbcd4769 21
mbed_official 82:0b31dbcd4769 22 #define CHANNEL_NUM 64 // 31 pins on 2 ports
mbed_official 82:0b31dbcd4769 23
mbed_official 82:0b31dbcd4769 24 static uint32_t channel_ids[CHANNEL_NUM] = {0};
mbed_official 82:0b31dbcd4769 25 static gpio_irq_handler irq_handler;
mbed_official 82:0b31dbcd4769 26
mbed_official 82:0b31dbcd4769 27 #define IRQ_DISABLED (0)
mbed_official 82:0b31dbcd4769 28 #define IRQ_RAISING_EDGE PORT_PCR_IRQC(9)
mbed_official 82:0b31dbcd4769 29 #define IRQ_FALLING_EDGE PORT_PCR_IRQC(10)
mbed_official 82:0b31dbcd4769 30 #define IRQ_EITHER_EDGE PORT_PCR_IRQC(11)
mbed_official 82:0b31dbcd4769 31
mbed_official 82:0b31dbcd4769 32 static void handle_interrupt_in(PORT_Type *port, int ch_base) {
mbed_official 82:0b31dbcd4769 33 uint32_t mask = 0, i;
mbed_official 82:0b31dbcd4769 34
mbed_official 82:0b31dbcd4769 35 for (i = 0; i < 32; i++) {
mbed_official 82:0b31dbcd4769 36 uint32_t pmask = (1 << i);
mbed_official 82:0b31dbcd4769 37 if (port->ISFR & pmask) {
mbed_official 82:0b31dbcd4769 38 mask |= pmask;
mbed_official 82:0b31dbcd4769 39 uint32_t id = channel_ids[ch_base + i];
mbed_official 82:0b31dbcd4769 40 if (id == 0) continue;
mbed_official 82:0b31dbcd4769 41
mbed_official 82:0b31dbcd4769 42 FGPIO_Type *gpio;
mbed_official 82:0b31dbcd4769 43 gpio_irq_event event = IRQ_NONE;
mbed_official 82:0b31dbcd4769 44 switch (port->PCR[i] & PORT_PCR_IRQC_MASK) {
mbed_official 82:0b31dbcd4769 45 case IRQ_RAISING_EDGE:
mbed_official 82:0b31dbcd4769 46 event = IRQ_RISE;
mbed_official 82:0b31dbcd4769 47 break;
mbed_official 82:0b31dbcd4769 48
mbed_official 82:0b31dbcd4769 49 case IRQ_FALLING_EDGE:
mbed_official 82:0b31dbcd4769 50 event = IRQ_FALL;
mbed_official 82:0b31dbcd4769 51 break;
mbed_official 82:0b31dbcd4769 52
mbed_official 82:0b31dbcd4769 53 case IRQ_EITHER_EDGE:
mbed_official 82:0b31dbcd4769 54 gpio = (port == PORTA) ? (FPTA) : (FPTB);
mbed_official 82:0b31dbcd4769 55 event = (gpio->PDIR & pmask) ? (IRQ_RISE) : (IRQ_FALL);
mbed_official 82:0b31dbcd4769 56 break;
mbed_official 82:0b31dbcd4769 57 }
mbed_official 82:0b31dbcd4769 58 if (event != IRQ_NONE) {
mbed_official 82:0b31dbcd4769 59 irq_handler(id, event);
mbed_official 82:0b31dbcd4769 60 }
mbed_official 82:0b31dbcd4769 61 }
mbed_official 82:0b31dbcd4769 62 }
mbed_official 82:0b31dbcd4769 63 port->ISFR = mask;
mbed_official 82:0b31dbcd4769 64 }
mbed_official 82:0b31dbcd4769 65
mbed_official 82:0b31dbcd4769 66 /* IRQ only on PORTA and PORTB */
mbed_official 82:0b31dbcd4769 67 void gpio_irqA(void) {
mbed_official 82:0b31dbcd4769 68 handle_interrupt_in(PORTA, 0);
mbed_official 82:0b31dbcd4769 69 }
mbed_official 82:0b31dbcd4769 70
mbed_official 82:0b31dbcd4769 71 void gpio_irqB(void) {
mbed_official 82:0b31dbcd4769 72 handle_interrupt_in(PORTB, 32);
mbed_official 82:0b31dbcd4769 73 }
mbed_official 82:0b31dbcd4769 74
mbed_official 82:0b31dbcd4769 75 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
mbed_official 82:0b31dbcd4769 76 if (pin == NC) return -1;
mbed_official 82:0b31dbcd4769 77
mbed_official 82:0b31dbcd4769 78 irq_handler = handler;
mbed_official 82:0b31dbcd4769 79
mbed_official 82:0b31dbcd4769 80 obj->port = pin >> PORT_SHIFT;
mbed_official 82:0b31dbcd4769 81 obj->pin = (pin & 0x7F) >> 2;
mbed_official 82:0b31dbcd4769 82
mbed_official 82:0b31dbcd4769 83 uint32_t ch_base, vector;
mbed_official 82:0b31dbcd4769 84 IRQn_Type irq_n;
mbed_official 82:0b31dbcd4769 85 switch (obj->port) {
mbed_official 82:0b31dbcd4769 86 case PortA:
mbed_official 82:0b31dbcd4769 87 ch_base = 0;
mbed_official 82:0b31dbcd4769 88 irq_n = PORTA_IRQn;
mbed_official 82:0b31dbcd4769 89 vector = (uint32_t)gpio_irqA;
mbed_official 82:0b31dbcd4769 90 break;
mbed_official 82:0b31dbcd4769 91
mbed_official 82:0b31dbcd4769 92 case PortB:
mbed_official 82:0b31dbcd4769 93 ch_base = 32;
mbed_official 82:0b31dbcd4769 94 irq_n = PORTB_IRQn;
mbed_official 82:0b31dbcd4769 95 vector = (uint32_t)gpio_irqB;
mbed_official 82:0b31dbcd4769 96 break;
mbed_official 82:0b31dbcd4769 97
mbed_official 82:0b31dbcd4769 98 default:
mbed_official 82:0b31dbcd4769 99 error("gpio_irq only supported on Port A and B\n");
mbed_official 82:0b31dbcd4769 100 break;
mbed_official 82:0b31dbcd4769 101 }
mbed_official 82:0b31dbcd4769 102 NVIC_SetVector(irq_n, vector);
mbed_official 82:0b31dbcd4769 103 NVIC_EnableIRQ(irq_n);
mbed_official 82:0b31dbcd4769 104
mbed_official 82:0b31dbcd4769 105 obj->ch = ch_base + obj->pin;
mbed_official 82:0b31dbcd4769 106 channel_ids[obj->ch] = id;
mbed_official 82:0b31dbcd4769 107
mbed_official 82:0b31dbcd4769 108 return 0;
mbed_official 82:0b31dbcd4769 109 }
mbed_official 82:0b31dbcd4769 110
mbed_official 82:0b31dbcd4769 111 void gpio_irq_free(gpio_irq_t *obj) {
mbed_official 82:0b31dbcd4769 112 channel_ids[obj->ch] = 0;
mbed_official 82:0b31dbcd4769 113 }
mbed_official 82:0b31dbcd4769 114
mbed_official 82:0b31dbcd4769 115 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
mbed_official 82:0b31dbcd4769 116 PORT_Type *port = (PORT_Type *)(PORTA_BASE + 0x1000 * obj->port);
mbed_official 82:0b31dbcd4769 117
mbed_official 82:0b31dbcd4769 118 uint32_t irq_settings = IRQ_DISABLED;
mbed_official 82:0b31dbcd4769 119
mbed_official 82:0b31dbcd4769 120 switch (port->PCR[obj->pin] & PORT_PCR_IRQC_MASK) {
mbed_official 82:0b31dbcd4769 121 case IRQ_DISABLED:
mbed_official 82:0b31dbcd4769 122 if (enable) {
mbed_official 82:0b31dbcd4769 123 irq_settings = (event == IRQ_RISE) ? (IRQ_RAISING_EDGE) : (IRQ_FALLING_EDGE);
mbed_official 82:0b31dbcd4769 124 }
mbed_official 82:0b31dbcd4769 125 break;
mbed_official 82:0b31dbcd4769 126
mbed_official 82:0b31dbcd4769 127 case IRQ_RAISING_EDGE:
mbed_official 82:0b31dbcd4769 128 if (enable) {
mbed_official 82:0b31dbcd4769 129 irq_settings = (event == IRQ_RISE) ? (IRQ_RAISING_EDGE) : (IRQ_EITHER_EDGE);
mbed_official 82:0b31dbcd4769 130 } else {
mbed_official 82:0b31dbcd4769 131 if (event == IRQ_FALL)
mbed_official 82:0b31dbcd4769 132 irq_settings = IRQ_RAISING_EDGE;
mbed_official 82:0b31dbcd4769 133 }
mbed_official 82:0b31dbcd4769 134 break;
mbed_official 82:0b31dbcd4769 135
mbed_official 82:0b31dbcd4769 136 case IRQ_FALLING_EDGE:
mbed_official 82:0b31dbcd4769 137 if (enable) {
mbed_official 82:0b31dbcd4769 138 irq_settings = (event == IRQ_FALL) ? (IRQ_FALLING_EDGE) : (IRQ_EITHER_EDGE);
mbed_official 82:0b31dbcd4769 139 } else {
mbed_official 82:0b31dbcd4769 140 if (event == IRQ_RISE)
mbed_official 82:0b31dbcd4769 141 irq_settings = IRQ_FALLING_EDGE;
mbed_official 82:0b31dbcd4769 142 }
mbed_official 82:0b31dbcd4769 143 break;
mbed_official 82:0b31dbcd4769 144
mbed_official 82:0b31dbcd4769 145 case IRQ_EITHER_EDGE:
mbed_official 82:0b31dbcd4769 146 if (enable) {
mbed_official 82:0b31dbcd4769 147 irq_settings = IRQ_EITHER_EDGE;
mbed_official 82:0b31dbcd4769 148 } else {
mbed_official 82:0b31dbcd4769 149 irq_settings = (event == IRQ_RISE) ? (IRQ_FALLING_EDGE) : (IRQ_RAISING_EDGE);
mbed_official 82:0b31dbcd4769 150 }
mbed_official 82:0b31dbcd4769 151 break;
mbed_official 82:0b31dbcd4769 152 }
mbed_official 82:0b31dbcd4769 153
mbed_official 82:0b31dbcd4769 154 // Interrupt configuration and clear interrupt
mbed_official 82:0b31dbcd4769 155 port->PCR[obj->pin] = (port->PCR[obj->pin] & ~PORT_PCR_IRQC_MASK) | irq_settings | PORT_PCR_ISF_MASK;
mbed_official 82:0b31dbcd4769 156 }
mbed_official 82:0b31dbcd4769 157
mbed_official 82:0b31dbcd4769 158 void gpio_irq_enable(gpio_irq_t *obj) {
mbed_official 82:0b31dbcd4769 159 if (obj->port == PortA) {
mbed_official 82:0b31dbcd4769 160 NVIC_EnableIRQ(PORTA_IRQn);
mbed_official 82:0b31dbcd4769 161 } else if (obj->port == PortB) {
mbed_official 82:0b31dbcd4769 162 NVIC_EnableIRQ(PORTB_IRQn);
mbed_official 82:0b31dbcd4769 163 }
mbed_official 82:0b31dbcd4769 164 }
mbed_official 82:0b31dbcd4769 165
mbed_official 82:0b31dbcd4769 166 void gpio_irq_disable(gpio_irq_t *obj) {
mbed_official 82:0b31dbcd4769 167 if (obj->port == PortA) {
mbed_official 82:0b31dbcd4769 168 NVIC_DisableIRQ(PORTA_IRQn);
mbed_official 82:0b31dbcd4769 169 } else if (obj->port == PortB) {
mbed_official 82:0b31dbcd4769 170 NVIC_DisableIRQ(PORTB_IRQn);
mbed_official 82:0b31dbcd4769 171 }
mbed_official 82:0b31dbcd4769 172 }