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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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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@274:6937b19af361, 2014-08-06 (annotated)

Committer:
mbed_official
Date:
Wed Aug 06 08:15:07 2014 +0100
Revision:
274:6937b19af361
Parent:
254:181b5e179739
Child:
285:31249416b6f9
Synchronized with git revision 5b145e4f6c509376173c3ea2aa35a6da879a2124



Full URL: https://github.com/mbedmicro/mbed/commit/5b145e4f6c509376173c3ea2aa35a6da879a2124/



[TARGET_LPC11UXX] PeripheralNames.h and PinMap definitions separation for LPC11UXX platforms

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 251:de9a1e4ffd79 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 254:181b5e179739 33 const uint32_t search_bits[] = {0x0000FFFF, 0x000000FF, 0x0000000F, 0x00000003, 0x00000001};
mbed_official 254:181b5e179739 34
mbed_official 82:0b31dbcd4769 35 static void handle_interrupt_in(PORT_Type *port, int ch_base) {
mbed_official 254:181b5e179739 36 uint32_t isfr;
mbed_official 254:181b5e179739 37 uint8_t location;
mbed_official 82:0b31dbcd4769 38
mbed_official 254:181b5e179739 39 while((isfr = port->ISFR) != 0) {
mbed_official 254:181b5e179739 40 location = 0;
mbed_official 254:181b5e179739 41 for (int i = 0; i < 5; i++) {
mbed_official 254:181b5e179739 42 if (!(isfr & (search_bits[i] << location)))
mbed_official 254:181b5e179739 43 location += 1 << (4 - i);
mbed_official 254:181b5e179739 44 }
mbed_official 254:181b5e179739 45
mbed_official 254:181b5e179739 46 uint32_t id = channel_ids[ch_base + location];
mbed_official 254:181b5e179739 47 if (id == 0) {
mbed_official 254:181b5e179739 48 continue;
mbed_official 254:181b5e179739 49 }
mbed_official 82:0b31dbcd4769 50
mbed_official 254:181b5e179739 51 FGPIO_Type *gpio;
mbed_official 254:181b5e179739 52 gpio_irq_event event = IRQ_NONE;
mbed_official 254:181b5e179739 53 switch (port->PCR[location] & PORT_PCR_IRQC_MASK) {
mbed_official 254:181b5e179739 54 case IRQ_RAISING_EDGE:
mbed_official 254:181b5e179739 55 event = IRQ_RISE;
mbed_official 254:181b5e179739 56 break;
mbed_official 82:0b31dbcd4769 57
mbed_official 254:181b5e179739 58 case IRQ_FALLING_EDGE:
mbed_official 254:181b5e179739 59 event = IRQ_FALL;
mbed_official 254:181b5e179739 60 break;
mbed_official 82:0b31dbcd4769 61
mbed_official 254:181b5e179739 62 case IRQ_EITHER_EDGE:
mbed_official 254:181b5e179739 63 gpio = (port == PORTA) ? (FPTA) : (FPTB);
mbed_official 254:181b5e179739 64 event = (gpio->PDIR & (1 << location)) ? (IRQ_RISE) : (IRQ_FALL);
mbed_official 254:181b5e179739 65 break;
mbed_official 82:0b31dbcd4769 66 }
mbed_official 254:181b5e179739 67 if (event != IRQ_NONE) {
mbed_official 254:181b5e179739 68 irq_handler(id, event);
mbed_official 254:181b5e179739 69 }
mbed_official 254:181b5e179739 70 port->ISFR = 1 << location;
mbed_official 82:0b31dbcd4769 71 }
mbed_official 82:0b31dbcd4769 72 }
mbed_official 82:0b31dbcd4769 73
mbed_official 82:0b31dbcd4769 74 /* IRQ only on PORTA and PORTB */
mbed_official 82:0b31dbcd4769 75 void gpio_irqA(void) {
mbed_official 82:0b31dbcd4769 76 handle_interrupt_in(PORTA, 0);
mbed_official 82:0b31dbcd4769 77 }
mbed_official 82:0b31dbcd4769 78
mbed_official 82:0b31dbcd4769 79 void gpio_irqB(void) {
mbed_official 82:0b31dbcd4769 80 handle_interrupt_in(PORTB, 32);
mbed_official 82:0b31dbcd4769 81 }
mbed_official 82:0b31dbcd4769 82
mbed_official 82:0b31dbcd4769 83 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
mbed_official 82:0b31dbcd4769 84 if (pin == NC) return -1;
mbed_official 82:0b31dbcd4769 85
mbed_official 82:0b31dbcd4769 86 irq_handler = handler;
mbed_official 82:0b31dbcd4769 87
mbed_official 82:0b31dbcd4769 88 obj->port = pin >> PORT_SHIFT;
mbed_official 82:0b31dbcd4769 89 obj->pin = (pin & 0x7F) >> 2;
mbed_official 82:0b31dbcd4769 90
mbed_official 82:0b31dbcd4769 91 uint32_t ch_base, vector;
mbed_official 82:0b31dbcd4769 92 IRQn_Type irq_n;
mbed_official 82:0b31dbcd4769 93 switch (obj->port) {
mbed_official 254:181b5e179739 94 case PortA:
mbed_official 254:181b5e179739 95 ch_base = 0;
mbed_official 254:181b5e179739 96 irq_n = PORTA_IRQn;
mbed_official 254:181b5e179739 97 vector = (uint32_t)gpio_irqA;
mbed_official 254:181b5e179739 98 break;
mbed_official 82:0b31dbcd4769 99
mbed_official 254:181b5e179739 100 case PortB:
mbed_official 254:181b5e179739 101 ch_base = 32;
mbed_official 254:181b5e179739 102 irq_n = PORTB_IRQn;
mbed_official 254:181b5e179739 103 vector = (uint32_t)gpio_irqB;
mbed_official 254:181b5e179739 104 break;
mbed_official 82:0b31dbcd4769 105
mbed_official 254:181b5e179739 106 default:
mbed_official 254:181b5e179739 107 error("gpio_irq only supported on Port A and B");
mbed_official 254:181b5e179739 108 break;
mbed_official 82:0b31dbcd4769 109 }
mbed_official 82:0b31dbcd4769 110 NVIC_SetVector(irq_n, vector);
mbed_official 82:0b31dbcd4769 111 NVIC_EnableIRQ(irq_n);
mbed_official 82:0b31dbcd4769 112
mbed_official 82:0b31dbcd4769 113 obj->ch = ch_base + obj->pin;
mbed_official 82:0b31dbcd4769 114 channel_ids[obj->ch] = id;
mbed_official 82:0b31dbcd4769 115
mbed_official 82:0b31dbcd4769 116 return 0;
mbed_official 82:0b31dbcd4769 117 }
mbed_official 82:0b31dbcd4769 118
mbed_official 82:0b31dbcd4769 119 void gpio_irq_free(gpio_irq_t *obj) {
mbed_official 82:0b31dbcd4769 120 channel_ids[obj->ch] = 0;
mbed_official 82:0b31dbcd4769 121 }
mbed_official 82:0b31dbcd4769 122
mbed_official 82:0b31dbcd4769 123 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
mbed_official 82:0b31dbcd4769 124 PORT_Type *port = (PORT_Type *)(PORTA_BASE + 0x1000 * obj->port);
mbed_official 82:0b31dbcd4769 125
mbed_official 82:0b31dbcd4769 126 uint32_t irq_settings = IRQ_DISABLED;
mbed_official 82:0b31dbcd4769 127
mbed_official 82:0b31dbcd4769 128 switch (port->PCR[obj->pin] & PORT_PCR_IRQC_MASK) {
mbed_official 82:0b31dbcd4769 129 case IRQ_DISABLED:
mbed_official 82:0b31dbcd4769 130 if (enable) {
mbed_official 82:0b31dbcd4769 131 irq_settings = (event == IRQ_RISE) ? (IRQ_RAISING_EDGE) : (IRQ_FALLING_EDGE);
mbed_official 82:0b31dbcd4769 132 }
mbed_official 82:0b31dbcd4769 133 break;
mbed_official 82:0b31dbcd4769 134
mbed_official 82:0b31dbcd4769 135 case IRQ_RAISING_EDGE:
mbed_official 82:0b31dbcd4769 136 if (enable) {
mbed_official 82:0b31dbcd4769 137 irq_settings = (event == IRQ_RISE) ? (IRQ_RAISING_EDGE) : (IRQ_EITHER_EDGE);
mbed_official 82:0b31dbcd4769 138 } else {
mbed_official 82:0b31dbcd4769 139 if (event == IRQ_FALL)
mbed_official 82:0b31dbcd4769 140 irq_settings = IRQ_RAISING_EDGE;
mbed_official 82:0b31dbcd4769 141 }
mbed_official 82:0b31dbcd4769 142 break;
mbed_official 82:0b31dbcd4769 143
mbed_official 82:0b31dbcd4769 144 case IRQ_FALLING_EDGE:
mbed_official 82:0b31dbcd4769 145 if (enable) {
mbed_official 82:0b31dbcd4769 146 irq_settings = (event == IRQ_FALL) ? (IRQ_FALLING_EDGE) : (IRQ_EITHER_EDGE);
mbed_official 82:0b31dbcd4769 147 } else {
mbed_official 82:0b31dbcd4769 148 if (event == IRQ_RISE)
mbed_official 82:0b31dbcd4769 149 irq_settings = IRQ_FALLING_EDGE;
mbed_official 82:0b31dbcd4769 150 }
mbed_official 82:0b31dbcd4769 151 break;
mbed_official 82:0b31dbcd4769 152
mbed_official 82:0b31dbcd4769 153 case IRQ_EITHER_EDGE:
mbed_official 82:0b31dbcd4769 154 if (enable) {
mbed_official 82:0b31dbcd4769 155 irq_settings = IRQ_EITHER_EDGE;
mbed_official 82:0b31dbcd4769 156 } else {
mbed_official 82:0b31dbcd4769 157 irq_settings = (event == IRQ_RISE) ? (IRQ_FALLING_EDGE) : (IRQ_RAISING_EDGE);
mbed_official 82:0b31dbcd4769 158 }
mbed_official 82:0b31dbcd4769 159 break;
mbed_official 82:0b31dbcd4769 160 }
mbed_official 82:0b31dbcd4769 161
mbed_official 82:0b31dbcd4769 162 // Interrupt configuration and clear interrupt
mbed_official 82:0b31dbcd4769 163 port->PCR[obj->pin] = (port->PCR[obj->pin] & ~PORT_PCR_IRQC_MASK) | irq_settings | PORT_PCR_ISF_MASK;
mbed_official 82:0b31dbcd4769 164 }
mbed_official 82:0b31dbcd4769 165
mbed_official 82:0b31dbcd4769 166 void gpio_irq_enable(gpio_irq_t *obj) {
mbed_official 82:0b31dbcd4769 167 if (obj->port == PortA) {
mbed_official 82:0b31dbcd4769 168 NVIC_EnableIRQ(PORTA_IRQn);
mbed_official 82:0b31dbcd4769 169 } else if (obj->port == PortB) {
mbed_official 82:0b31dbcd4769 170 NVIC_EnableIRQ(PORTB_IRQn);
mbed_official 82:0b31dbcd4769 171 }
mbed_official 82:0b31dbcd4769 172 }
mbed_official 82:0b31dbcd4769 173
mbed_official 82:0b31dbcd4769 174 void gpio_irq_disable(gpio_irq_t *obj) {
mbed_official 82:0b31dbcd4769 175 if (obj->port == PortA) {
mbed_official 82:0b31dbcd4769 176 NVIC_DisableIRQ(PORTA_IRQn);
mbed_official 82:0b31dbcd4769 177 } else if (obj->port == PortB) {
mbed_official 82:0b31dbcd4769 178 NVIC_DisableIRQ(PORTB_IRQn);
mbed_official 82:0b31dbcd4769 179 }
mbed_official 82:0b31dbcd4769 180 }