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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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@134:4fb64af58963, 2014-03-25 (annotated)

Committer:
mbed_official
Date:
Tue Mar 25 09:30:07 2014 +0000
Revision:
134:4fb64af58963
Parent:
113:65a335a675de
Child:
158:3121b9889f7b
Synchronized with git revision d4c04e866e041b272b75d9ee61ff446dc5efebfd



Full URL: https://github.com/mbedmicro/mbed/commit/d4c04e866e041b272b75d9ee61ff446dc5efebfd/



Create a platform specific file to override WEAK Handlers and pre-main hook mbed_sdk_init



I thought about a better solution for this problem, but I couldn't find one, so this is fine. Just one comment: I wouldn't name that file 'platform_init.c'. First, it might contain other code than just initialization code (for example, mbed_die is also declared as a weak function and we'll need to override it for NRF51822). Second, it doesn't realy send the "this file is special and should be treated as such" message. I'd call it something like 'mbed_overrides.c'. But I'll make this change later. Thanks for the pull request!

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 113:65a335a675de 20 #include "gpio_api.h"
mbed_official 82:0b31dbcd4769 21 #include "error.h"
mbed_official 82:0b31dbcd4769 22
mbed_official 82:0b31dbcd4769 23 #define CHANNEL_NUM 64 // 31 pins on 2 ports
mbed_official 82:0b31dbcd4769 24
mbed_official 82:0b31dbcd4769 25 static uint32_t channel_ids[CHANNEL_NUM] = {0};
mbed_official 82:0b31dbcd4769 26 static gpio_irq_handler irq_handler;
mbed_official 82:0b31dbcd4769 27
mbed_official 82:0b31dbcd4769 28 #define IRQ_DISABLED (0)
mbed_official 82:0b31dbcd4769 29 #define IRQ_RAISING_EDGE PORT_PCR_IRQC(9)
mbed_official 82:0b31dbcd4769 30 #define IRQ_FALLING_EDGE PORT_PCR_IRQC(10)
mbed_official 82:0b31dbcd4769 31 #define IRQ_EITHER_EDGE PORT_PCR_IRQC(11)
mbed_official 82:0b31dbcd4769 32
mbed_official 82:0b31dbcd4769 33 static void handle_interrupt_in(PORT_Type *port, int ch_base) {
mbed_official 82:0b31dbcd4769 34 uint32_t mask = 0, i;
mbed_official 82:0b31dbcd4769 35
mbed_official 82:0b31dbcd4769 36 for (i = 0; i < 32; i++) {
mbed_official 82:0b31dbcd4769 37 uint32_t pmask = (1 << i);
mbed_official 82:0b31dbcd4769 38 if (port->ISFR & pmask) {
mbed_official 82:0b31dbcd4769 39 mask |= pmask;
mbed_official 82:0b31dbcd4769 40 uint32_t id = channel_ids[ch_base + i];
mbed_official 86:26fc69fd3b6c 41 if (id == 0) {
mbed_official 86:26fc69fd3b6c 42 continue;
mbed_official 86:26fc69fd3b6c 43 }
mbed_official 82:0b31dbcd4769 44
mbed_official 82:0b31dbcd4769 45 FGPIO_Type *gpio;
mbed_official 82:0b31dbcd4769 46 gpio_irq_event event = IRQ_NONE;
mbed_official 82:0b31dbcd4769 47 switch (port->PCR[i] & PORT_PCR_IRQC_MASK) {
mbed_official 82:0b31dbcd4769 48 case IRQ_RAISING_EDGE:
mbed_official 82:0b31dbcd4769 49 event = IRQ_RISE;
mbed_official 82:0b31dbcd4769 50 break;
mbed_official 82:0b31dbcd4769 51
mbed_official 82:0b31dbcd4769 52 case IRQ_FALLING_EDGE:
mbed_official 82:0b31dbcd4769 53 event = IRQ_FALL;
mbed_official 82:0b31dbcd4769 54 break;
mbed_official 82:0b31dbcd4769 55
mbed_official 82:0b31dbcd4769 56 case IRQ_EITHER_EDGE:
mbed_official 82:0b31dbcd4769 57 gpio = (port == PORTA) ? (FPTA) : (FPTB);
mbed_official 82:0b31dbcd4769 58 event = (gpio->PDIR & pmask) ? (IRQ_RISE) : (IRQ_FALL);
mbed_official 82:0b31dbcd4769 59 break;
mbed_official 82:0b31dbcd4769 60 }
mbed_official 82:0b31dbcd4769 61 if (event != IRQ_NONE) {
mbed_official 82:0b31dbcd4769 62 irq_handler(id, event);
mbed_official 82:0b31dbcd4769 63 }
mbed_official 82:0b31dbcd4769 64 }
mbed_official 82:0b31dbcd4769 65 }
mbed_official 82:0b31dbcd4769 66 port->ISFR = mask;
mbed_official 82:0b31dbcd4769 67 }
mbed_official 82:0b31dbcd4769 68
mbed_official 82:0b31dbcd4769 69 /* IRQ only on PORTA and PORTB */
mbed_official 82:0b31dbcd4769 70 void gpio_irqA(void) {
mbed_official 82:0b31dbcd4769 71 handle_interrupt_in(PORTA, 0);
mbed_official 82:0b31dbcd4769 72 }
mbed_official 82:0b31dbcd4769 73
mbed_official 82:0b31dbcd4769 74 void gpio_irqB(void) {
mbed_official 82:0b31dbcd4769 75 handle_interrupt_in(PORTB, 32);
mbed_official 82:0b31dbcd4769 76 }
mbed_official 82:0b31dbcd4769 77
mbed_official 82:0b31dbcd4769 78 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
mbed_official 82:0b31dbcd4769 79 if (pin == NC) return -1;
mbed_official 82:0b31dbcd4769 80
mbed_official 82:0b31dbcd4769 81 irq_handler = handler;
mbed_official 82:0b31dbcd4769 82
mbed_official 82:0b31dbcd4769 83 obj->port = pin >> PORT_SHIFT;
mbed_official 82:0b31dbcd4769 84 obj->pin = (pin & 0x7F) >> 2;
mbed_official 82:0b31dbcd4769 85
mbed_official 82:0b31dbcd4769 86 uint32_t ch_base, vector;
mbed_official 82:0b31dbcd4769 87 IRQn_Type irq_n;
mbed_official 82:0b31dbcd4769 88 switch (obj->port) {
mbed_official 82:0b31dbcd4769 89 case PortA:
mbed_official 82:0b31dbcd4769 90 ch_base = 0;
mbed_official 82:0b31dbcd4769 91 irq_n = PORTA_IRQn;
mbed_official 82:0b31dbcd4769 92 vector = (uint32_t)gpio_irqA;
mbed_official 82:0b31dbcd4769 93 break;
mbed_official 82:0b31dbcd4769 94
mbed_official 82:0b31dbcd4769 95 case PortB:
mbed_official 82:0b31dbcd4769 96 ch_base = 32;
mbed_official 82:0b31dbcd4769 97 irq_n = PORTB_IRQn;
mbed_official 82:0b31dbcd4769 98 vector = (uint32_t)gpio_irqB;
mbed_official 82:0b31dbcd4769 99 break;
mbed_official 82:0b31dbcd4769 100
mbed_official 82:0b31dbcd4769 101 default:
mbed_official 82:0b31dbcd4769 102 error("gpio_irq only supported on Port A and B\n");
mbed_official 82:0b31dbcd4769 103 break;
mbed_official 82:0b31dbcd4769 104 }
mbed_official 82:0b31dbcd4769 105 NVIC_SetVector(irq_n, vector);
mbed_official 82:0b31dbcd4769 106 NVIC_EnableIRQ(irq_n);
mbed_official 82:0b31dbcd4769 107
mbed_official 82:0b31dbcd4769 108 obj->ch = ch_base + obj->pin;
mbed_official 82:0b31dbcd4769 109 channel_ids[obj->ch] = id;
mbed_official 82:0b31dbcd4769 110
mbed_official 82:0b31dbcd4769 111 return 0;
mbed_official 82:0b31dbcd4769 112 }
mbed_official 82:0b31dbcd4769 113
mbed_official 82:0b31dbcd4769 114 void gpio_irq_free(gpio_irq_t *obj) {
mbed_official 82:0b31dbcd4769 115 channel_ids[obj->ch] = 0;
mbed_official 82:0b31dbcd4769 116 }
mbed_official 82:0b31dbcd4769 117
mbed_official 82:0b31dbcd4769 118 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
mbed_official 82:0b31dbcd4769 119 PORT_Type *port = (PORT_Type *)(PORTA_BASE + 0x1000 * obj->port);
mbed_official 82:0b31dbcd4769 120
mbed_official 82:0b31dbcd4769 121 uint32_t irq_settings = IRQ_DISABLED;
mbed_official 82:0b31dbcd4769 122
mbed_official 82:0b31dbcd4769 123 switch (port->PCR[obj->pin] & PORT_PCR_IRQC_MASK) {
mbed_official 82:0b31dbcd4769 124 case IRQ_DISABLED:
mbed_official 82:0b31dbcd4769 125 if (enable) {
mbed_official 82:0b31dbcd4769 126 irq_settings = (event == IRQ_RISE) ? (IRQ_RAISING_EDGE) : (IRQ_FALLING_EDGE);
mbed_official 82:0b31dbcd4769 127 }
mbed_official 82:0b31dbcd4769 128 break;
mbed_official 82:0b31dbcd4769 129
mbed_official 82:0b31dbcd4769 130 case IRQ_RAISING_EDGE:
mbed_official 82:0b31dbcd4769 131 if (enable) {
mbed_official 82:0b31dbcd4769 132 irq_settings = (event == IRQ_RISE) ? (IRQ_RAISING_EDGE) : (IRQ_EITHER_EDGE);
mbed_official 82:0b31dbcd4769 133 } else {
mbed_official 82:0b31dbcd4769 134 if (event == IRQ_FALL)
mbed_official 82:0b31dbcd4769 135 irq_settings = IRQ_RAISING_EDGE;
mbed_official 82:0b31dbcd4769 136 }
mbed_official 82:0b31dbcd4769 137 break;
mbed_official 82:0b31dbcd4769 138
mbed_official 82:0b31dbcd4769 139 case IRQ_FALLING_EDGE:
mbed_official 82:0b31dbcd4769 140 if (enable) {
mbed_official 82:0b31dbcd4769 141 irq_settings = (event == IRQ_FALL) ? (IRQ_FALLING_EDGE) : (IRQ_EITHER_EDGE);
mbed_official 82:0b31dbcd4769 142 } else {
mbed_official 82:0b31dbcd4769 143 if (event == IRQ_RISE)
mbed_official 82:0b31dbcd4769 144 irq_settings = IRQ_FALLING_EDGE;
mbed_official 82:0b31dbcd4769 145 }
mbed_official 82:0b31dbcd4769 146 break;
mbed_official 82:0b31dbcd4769 147
mbed_official 82:0b31dbcd4769 148 case IRQ_EITHER_EDGE:
mbed_official 82:0b31dbcd4769 149 if (enable) {
mbed_official 82:0b31dbcd4769 150 irq_settings = IRQ_EITHER_EDGE;
mbed_official 82:0b31dbcd4769 151 } else {
mbed_official 82:0b31dbcd4769 152 irq_settings = (event == IRQ_RISE) ? (IRQ_FALLING_EDGE) : (IRQ_RAISING_EDGE);
mbed_official 82:0b31dbcd4769 153 }
mbed_official 82:0b31dbcd4769 154 break;
mbed_official 82:0b31dbcd4769 155 }
mbed_official 82:0b31dbcd4769 156
mbed_official 82:0b31dbcd4769 157 // Interrupt configuration and clear interrupt
mbed_official 82:0b31dbcd4769 158 port->PCR[obj->pin] = (port->PCR[obj->pin] & ~PORT_PCR_IRQC_MASK) | irq_settings | PORT_PCR_ISF_MASK;
mbed_official 82:0b31dbcd4769 159 }
mbed_official 82:0b31dbcd4769 160
mbed_official 82:0b31dbcd4769 161 void gpio_irq_enable(gpio_irq_t *obj) {
mbed_official 82:0b31dbcd4769 162 if (obj->port == PortA) {
mbed_official 82:0b31dbcd4769 163 NVIC_EnableIRQ(PORTA_IRQn);
mbed_official 82:0b31dbcd4769 164 } else if (obj->port == PortB) {
mbed_official 82:0b31dbcd4769 165 NVIC_EnableIRQ(PORTB_IRQn);
mbed_official 82:0b31dbcd4769 166 }
mbed_official 82:0b31dbcd4769 167 }
mbed_official 82:0b31dbcd4769 168
mbed_official 82:0b31dbcd4769 169 void gpio_irq_disable(gpio_irq_t *obj) {
mbed_official 82:0b31dbcd4769 170 if (obj->port == PortA) {
mbed_official 82:0b31dbcd4769 171 NVIC_DisableIRQ(PORTA_IRQn);
mbed_official 82:0b31dbcd4769 172 } else if (obj->port == PortB) {
mbed_official 82:0b31dbcd4769 173 NVIC_DisableIRQ(PORTB_IRQn);
mbed_official 82:0b31dbcd4769 174 }
mbed_official 82:0b31dbcd4769 175 }