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mbed library sources

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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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

Import librarymbed

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@111:ae4891ca7084, 2014-03-06 (annotated)

Committer:
mbed_official
Date:
Thu Mar 06 10:00:06 2014 +0000
Revision:
111:ae4891ca7084
Parent:
86:26fc69fd3b6c
Child:
113:65a335a675de
Synchronized with git revision 955bd9a5c9e042f1cf30bbae2a99afaab8eb4cbf



Full URL: https://github.com/mbedmicro/mbed/commit/955bd9a5c9e042f1cf30bbae2a99afaab8eb4cbf/

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 86:26fc69fd3b6c 40 if (id == 0) {
mbed_official 86:26fc69fd3b6c 41 continue;
mbed_official 86:26fc69fd3b6c 42 }
mbed_official 82:0b31dbcd4769 43
mbed_official 82:0b31dbcd4769 44 FGPIO_Type *gpio;
mbed_official 82:0b31dbcd4769 45 gpio_irq_event event = IRQ_NONE;
mbed_official 82:0b31dbcd4769 46 switch (port->PCR[i] & PORT_PCR_IRQC_MASK) {
mbed_official 82:0b31dbcd4769 47 case IRQ_RAISING_EDGE:
mbed_official 82:0b31dbcd4769 48 event = IRQ_RISE;
mbed_official 82:0b31dbcd4769 49 break;
mbed_official 82:0b31dbcd4769 50
mbed_official 82:0b31dbcd4769 51 case IRQ_FALLING_EDGE:
mbed_official 82:0b31dbcd4769 52 event = IRQ_FALL;
mbed_official 82:0b31dbcd4769 53 break;
mbed_official 82:0b31dbcd4769 54
mbed_official 82:0b31dbcd4769 55 case IRQ_EITHER_EDGE:
mbed_official 82:0b31dbcd4769 56 gpio = (port == PORTA) ? (FPTA) : (FPTB);
mbed_official 82:0b31dbcd4769 57 event = (gpio->PDIR & pmask) ? (IRQ_RISE) : (IRQ_FALL);
mbed_official 82:0b31dbcd4769 58 break;
mbed_official 82:0b31dbcd4769 59 }
mbed_official 82:0b31dbcd4769 60 if (event != IRQ_NONE) {
mbed_official 82:0b31dbcd4769 61 irq_handler(id, event);
mbed_official 82:0b31dbcd4769 62 }
mbed_official 82:0b31dbcd4769 63 }
mbed_official 82:0b31dbcd4769 64 }
mbed_official 82:0b31dbcd4769 65 port->ISFR = mask;
mbed_official 82:0b31dbcd4769 66 }
mbed_official 82:0b31dbcd4769 67
mbed_official 82:0b31dbcd4769 68 /* IRQ only on PORTA and PORTB */
mbed_official 82:0b31dbcd4769 69 void gpio_irqA(void) {
mbed_official 82:0b31dbcd4769 70 handle_interrupt_in(PORTA, 0);
mbed_official 82:0b31dbcd4769 71 }
mbed_official 82:0b31dbcd4769 72
mbed_official 82:0b31dbcd4769 73 void gpio_irqB(void) {
mbed_official 82:0b31dbcd4769 74 handle_interrupt_in(PORTB, 32);
mbed_official 82:0b31dbcd4769 75 }
mbed_official 82:0b31dbcd4769 76
mbed_official 82:0b31dbcd4769 77 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
mbed_official 82:0b31dbcd4769 78 if (pin == NC) return -1;
mbed_official 82:0b31dbcd4769 79
mbed_official 82:0b31dbcd4769 80 irq_handler = handler;
mbed_official 82:0b31dbcd4769 81
mbed_official 82:0b31dbcd4769 82 obj->port = pin >> PORT_SHIFT;
mbed_official 82:0b31dbcd4769 83 obj->pin = (pin & 0x7F) >> 2;
mbed_official 82:0b31dbcd4769 84
mbed_official 82:0b31dbcd4769 85 uint32_t ch_base, vector;
mbed_official 82:0b31dbcd4769 86 IRQn_Type irq_n;
mbed_official 82:0b31dbcd4769 87 switch (obj->port) {
mbed_official 82:0b31dbcd4769 88 case PortA:
mbed_official 82:0b31dbcd4769 89 ch_base = 0;
mbed_official 82:0b31dbcd4769 90 irq_n = PORTA_IRQn;
mbed_official 82:0b31dbcd4769 91 vector = (uint32_t)gpio_irqA;
mbed_official 82:0b31dbcd4769 92 break;
mbed_official 82:0b31dbcd4769 93
mbed_official 82:0b31dbcd4769 94 case PortB:
mbed_official 82:0b31dbcd4769 95 ch_base = 32;
mbed_official 82:0b31dbcd4769 96 irq_n = PORTB_IRQn;
mbed_official 82:0b31dbcd4769 97 vector = (uint32_t)gpio_irqB;
mbed_official 82:0b31dbcd4769 98 break;
mbed_official 82:0b31dbcd4769 99
mbed_official 82:0b31dbcd4769 100 default:
mbed_official 82:0b31dbcd4769 101 error("gpio_irq only supported on Port A and B\n");
mbed_official 82:0b31dbcd4769 102 break;
mbed_official 82:0b31dbcd4769 103 }
mbed_official 82:0b31dbcd4769 104 NVIC_SetVector(irq_n, vector);
mbed_official 82:0b31dbcd4769 105 NVIC_EnableIRQ(irq_n);
mbed_official 82:0b31dbcd4769 106
mbed_official 82:0b31dbcd4769 107 obj->ch = ch_base + obj->pin;
mbed_official 82:0b31dbcd4769 108 channel_ids[obj->ch] = id;
mbed_official 82:0b31dbcd4769 109
mbed_official 82:0b31dbcd4769 110 return 0;
mbed_official 82:0b31dbcd4769 111 }
mbed_official 82:0b31dbcd4769 112
mbed_official 82:0b31dbcd4769 113 void gpio_irq_free(gpio_irq_t *obj) {
mbed_official 82:0b31dbcd4769 114 channel_ids[obj->ch] = 0;
mbed_official 82:0b31dbcd4769 115 }
mbed_official 82:0b31dbcd4769 116
mbed_official 82:0b31dbcd4769 117 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
mbed_official 82:0b31dbcd4769 118 PORT_Type *port = (PORT_Type *)(PORTA_BASE + 0x1000 * obj->port);
mbed_official 82:0b31dbcd4769 119
mbed_official 82:0b31dbcd4769 120 uint32_t irq_settings = IRQ_DISABLED;
mbed_official 82:0b31dbcd4769 121
mbed_official 82:0b31dbcd4769 122 switch (port->PCR[obj->pin] & PORT_PCR_IRQC_MASK) {
mbed_official 82:0b31dbcd4769 123 case IRQ_DISABLED:
mbed_official 82:0b31dbcd4769 124 if (enable) {
mbed_official 82:0b31dbcd4769 125 irq_settings = (event == IRQ_RISE) ? (IRQ_RAISING_EDGE) : (IRQ_FALLING_EDGE);
mbed_official 82:0b31dbcd4769 126 }
mbed_official 82:0b31dbcd4769 127 break;
mbed_official 82:0b31dbcd4769 128
mbed_official 82:0b31dbcd4769 129 case IRQ_RAISING_EDGE:
mbed_official 82:0b31dbcd4769 130 if (enable) {
mbed_official 82:0b31dbcd4769 131 irq_settings = (event == IRQ_RISE) ? (IRQ_RAISING_EDGE) : (IRQ_EITHER_EDGE);
mbed_official 82:0b31dbcd4769 132 } else {
mbed_official 82:0b31dbcd4769 133 if (event == IRQ_FALL)
mbed_official 82:0b31dbcd4769 134 irq_settings = IRQ_RAISING_EDGE;
mbed_official 82:0b31dbcd4769 135 }
mbed_official 82:0b31dbcd4769 136 break;
mbed_official 82:0b31dbcd4769 137
mbed_official 82:0b31dbcd4769 138 case IRQ_FALLING_EDGE:
mbed_official 82:0b31dbcd4769 139 if (enable) {
mbed_official 82:0b31dbcd4769 140 irq_settings = (event == IRQ_FALL) ? (IRQ_FALLING_EDGE) : (IRQ_EITHER_EDGE);
mbed_official 82:0b31dbcd4769 141 } else {
mbed_official 82:0b31dbcd4769 142 if (event == IRQ_RISE)
mbed_official 82:0b31dbcd4769 143 irq_settings = IRQ_FALLING_EDGE;
mbed_official 82:0b31dbcd4769 144 }
mbed_official 82:0b31dbcd4769 145 break;
mbed_official 82:0b31dbcd4769 146
mbed_official 82:0b31dbcd4769 147 case IRQ_EITHER_EDGE:
mbed_official 82:0b31dbcd4769 148 if (enable) {
mbed_official 82:0b31dbcd4769 149 irq_settings = IRQ_EITHER_EDGE;
mbed_official 82:0b31dbcd4769 150 } else {
mbed_official 82:0b31dbcd4769 151 irq_settings = (event == IRQ_RISE) ? (IRQ_FALLING_EDGE) : (IRQ_RAISING_EDGE);
mbed_official 82:0b31dbcd4769 152 }
mbed_official 82:0b31dbcd4769 153 break;
mbed_official 82:0b31dbcd4769 154 }
mbed_official 82:0b31dbcd4769 155
mbed_official 82:0b31dbcd4769 156 // Interrupt configuration and clear interrupt
mbed_official 82:0b31dbcd4769 157 port->PCR[obj->pin] = (port->PCR[obj->pin] & ~PORT_PCR_IRQC_MASK) | irq_settings | PORT_PCR_ISF_MASK;
mbed_official 82:0b31dbcd4769 158 }
mbed_official 82:0b31dbcd4769 159
mbed_official 82:0b31dbcd4769 160 void gpio_irq_enable(gpio_irq_t *obj) {
mbed_official 82:0b31dbcd4769 161 if (obj->port == PortA) {
mbed_official 82:0b31dbcd4769 162 NVIC_EnableIRQ(PORTA_IRQn);
mbed_official 82:0b31dbcd4769 163 } else if (obj->port == PortB) {
mbed_official 82:0b31dbcd4769 164 NVIC_EnableIRQ(PORTB_IRQn);
mbed_official 82:0b31dbcd4769 165 }
mbed_official 82:0b31dbcd4769 166 }
mbed_official 82:0b31dbcd4769 167
mbed_official 82:0b31dbcd4769 168 void gpio_irq_disable(gpio_irq_t *obj) {
mbed_official 82:0b31dbcd4769 169 if (obj->port == PortA) {
mbed_official 82:0b31dbcd4769 170 NVIC_DisableIRQ(PORTA_IRQn);
mbed_official 82:0b31dbcd4769 171 } else if (obj->port == PortB) {
mbed_official 82:0b31dbcd4769 172 NVIC_DisableIRQ(PORTB_IRQn);
mbed_official 82:0b31dbcd4769 173 }
mbed_official 82:0b31dbcd4769 174 }
mbed_official 86:26fc69fd3b6c 175
mbed_official 86:26fc69fd3b6c 176 // Change the NMI pin to an input. This allows NMI pin to
mbed_official 86:26fc69fd3b6c 177 // be used as a low power mode wakeup. The application will
mbed_official 86:26fc69fd3b6c 178 // need to change the pin back to NMI_b or wakeup only occurs once!
mbed_official 86:26fc69fd3b6c 179 extern void gpio_init(gpio_t *obj, PinName pin, PinDirection direction);
mbed_official 86:26fc69fd3b6c 180 void NMI_Handler(void)
mbed_official 86:26fc69fd3b6c 181 {
mbed_official 86:26fc69fd3b6c 182 gpio_t gpio;
mbed_official 86:26fc69fd3b6c 183 gpio_init(&gpio, PTB5, PIN_INPUT);
mbed_official 86:26fc69fd3b6c 184 }