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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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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_KL26Z/gpio_irq_api.c@585:a1ed5b41f74f, 2015-07-08 (annotated)

Committer:
mbed_official
Date:
Wed Jul 08 14:45:08 2015 +0100
Revision:
585:a1ed5b41f74f
Synchronized with git revision 7a2b57896e0263b82f31ddc5a0ad2443615db184



Full URL: https://github.com/mbedmicro/mbed/commit/7a2b57896e0263b82f31ddc5a0ad2443615db184/



Add rtc_api.c

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 585:a1ed5b41f74f 1 /* mbed Microcontroller Library
mbed_official 585:a1ed5b41f74f 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 585:a1ed5b41f74f 3 *
mbed_official 585:a1ed5b41f74f 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 585:a1ed5b41f74f 5 * you may not use this file except in compliance with the License.
mbed_official 585:a1ed5b41f74f 6 * You may obtain a copy of the License at
mbed_official 585:a1ed5b41f74f 7 *
mbed_official 585:a1ed5b41f74f 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 585:a1ed5b41f74f 9 *
mbed_official 585:a1ed5b41f74f 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 585:a1ed5b41f74f 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 585:a1ed5b41f74f 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 585:a1ed5b41f74f 13 * See the License for the specific language governing permissions and
mbed_official 585:a1ed5b41f74f 14 * limitations under the License.
mbed_official 585:a1ed5b41f74f 15 */
mbed_official 585:a1ed5b41f74f 16 #include <stddef.h>
mbed_official 585:a1ed5b41f74f 17 #include "cmsis.h"
mbed_official 585:a1ed5b41f74f 18
mbed_official 585:a1ed5b41f74f 19 #include "gpio_irq_api.h"
mbed_official 585:a1ed5b41f74f 20 #include "gpio_api.h"
mbed_official 585:a1ed5b41f74f 21 #include "mbed_error.h"
mbed_official 585:a1ed5b41f74f 22
mbed_official 585:a1ed5b41f74f 23 #define CHANNEL_NUM 64
mbed_official 585:a1ed5b41f74f 24
mbed_official 585:a1ed5b41f74f 25 static uint32_t channel_ids[CHANNEL_NUM] = {0};
mbed_official 585:a1ed5b41f74f 26 static gpio_irq_handler irq_handler;
mbed_official 585:a1ed5b41f74f 27
mbed_official 585:a1ed5b41f74f 28 #define IRQ_DISABLED (0)
mbed_official 585:a1ed5b41f74f 29 #define IRQ_RAISING_EDGE PORT_PCR_IRQC(9)
mbed_official 585:a1ed5b41f74f 30 #define IRQ_FALLING_EDGE PORT_PCR_IRQC(10)
mbed_official 585:a1ed5b41f74f 31 #define IRQ_EITHER_EDGE PORT_PCR_IRQC(11)
mbed_official 585:a1ed5b41f74f 32
mbed_official 585:a1ed5b41f74f 33 const uint32_t search_bits[] = {0x0000FFFF, 0x000000FF, 0x0000000F, 0x00000003, 0x00000001};
mbed_official 585:a1ed5b41f74f 34
mbed_official 585:a1ed5b41f74f 35 static void handle_interrupt_in(PORT_Type *port, int ch_base) {
mbed_official 585:a1ed5b41f74f 36 uint32_t isfr;
mbed_official 585:a1ed5b41f74f 37 uint8_t location;
mbed_official 585:a1ed5b41f74f 38
mbed_official 585:a1ed5b41f74f 39 while((isfr = port->ISFR) != 0) {
mbed_official 585:a1ed5b41f74f 40 location = 0;
mbed_official 585:a1ed5b41f74f 41 for (int i = 0; i < 5; i++) {
mbed_official 585:a1ed5b41f74f 42 if (!(isfr & (search_bits[i] << location)))
mbed_official 585:a1ed5b41f74f 43 location += 1 << (4 - i);
mbed_official 585:a1ed5b41f74f 44 }
mbed_official 585:a1ed5b41f74f 45
mbed_official 585:a1ed5b41f74f 46 uint32_t id = channel_ids[ch_base + location];
mbed_official 585:a1ed5b41f74f 47 if (id == 0) {
mbed_official 585:a1ed5b41f74f 48 continue;
mbed_official 585:a1ed5b41f74f 49 }
mbed_official 585:a1ed5b41f74f 50
mbed_official 585:a1ed5b41f74f 51 FGPIO_Type *gpio;
mbed_official 585:a1ed5b41f74f 52 gpio_irq_event event = IRQ_NONE;
mbed_official 585:a1ed5b41f74f 53 switch (port->PCR[location] & PORT_PCR_IRQC_MASK) {
mbed_official 585:a1ed5b41f74f 54 case IRQ_RAISING_EDGE:
mbed_official 585:a1ed5b41f74f 55 event = IRQ_RISE;
mbed_official 585:a1ed5b41f74f 56 break;
mbed_official 585:a1ed5b41f74f 57
mbed_official 585:a1ed5b41f74f 58 case IRQ_FALLING_EDGE:
mbed_official 585:a1ed5b41f74f 59 event = IRQ_FALL;
mbed_official 585:a1ed5b41f74f 60 break;
mbed_official 585:a1ed5b41f74f 61
mbed_official 585:a1ed5b41f74f 62 case IRQ_EITHER_EDGE:
mbed_official 585:a1ed5b41f74f 63 gpio = (port == PORTA) ? (FPTA) : (FPTD);
mbed_official 585:a1ed5b41f74f 64 event = (gpio->PDIR & (1 << location)) ? (IRQ_RISE) : (IRQ_FALL);
mbed_official 585:a1ed5b41f74f 65 break;
mbed_official 585:a1ed5b41f74f 66 }
mbed_official 585:a1ed5b41f74f 67 if (event != IRQ_NONE) {
mbed_official 585:a1ed5b41f74f 68 irq_handler(id, event);
mbed_official 585:a1ed5b41f74f 69 }
mbed_official 585:a1ed5b41f74f 70 port->ISFR = 1 << location;
mbed_official 585:a1ed5b41f74f 71 }
mbed_official 585:a1ed5b41f74f 72 }
mbed_official 585:a1ed5b41f74f 73
mbed_official 585:a1ed5b41f74f 74 void gpio_irqA(void) {handle_interrupt_in(PORTA, 0);}
mbed_official 585:a1ed5b41f74f 75 void gpio_irqD(void) {handle_interrupt_in(PORTD, 32);}
mbed_official 585:a1ed5b41f74f 76
mbed_official 585:a1ed5b41f74f 77 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
mbed_official 585:a1ed5b41f74f 78 if (pin == NC) return -1;
mbed_official 585:a1ed5b41f74f 79
mbed_official 585:a1ed5b41f74f 80 irq_handler = handler;
mbed_official 585:a1ed5b41f74f 81
mbed_official 585:a1ed5b41f74f 82 obj->port = pin >> PORT_SHIFT;
mbed_official 585:a1ed5b41f74f 83 obj->pin = (pin & 0x7F) >> 2;
mbed_official 585:a1ed5b41f74f 84
mbed_official 585:a1ed5b41f74f 85 uint32_t ch_base, vector;
mbed_official 585:a1ed5b41f74f 86 IRQn_Type irq_n;
mbed_official 585:a1ed5b41f74f 87 switch (obj->port) {
mbed_official 585:a1ed5b41f74f 88 case PortA:
mbed_official 585:a1ed5b41f74f 89 ch_base = 0; irq_n = PORTA_IRQn; vector = (uint32_t)gpio_irqA;
mbed_official 585:a1ed5b41f74f 90 break;
mbed_official 585:a1ed5b41f74f 91
mbed_official 585:a1ed5b41f74f 92 case PortD:
mbed_official 585:a1ed5b41f74f 93 ch_base = 32; irq_n = PORTD_IRQn; vector = (uint32_t)gpio_irqD;
mbed_official 585:a1ed5b41f74f 94 break;
mbed_official 585:a1ed5b41f74f 95
mbed_official 585:a1ed5b41f74f 96 default:
mbed_official 585:a1ed5b41f74f 97 error("gpio_irq only supported on port A and D");
mbed_official 585:a1ed5b41f74f 98 break;
mbed_official 585:a1ed5b41f74f 99 }
mbed_official 585:a1ed5b41f74f 100 NVIC_SetVector(irq_n, vector);
mbed_official 585:a1ed5b41f74f 101 NVIC_EnableIRQ(irq_n);
mbed_official 585:a1ed5b41f74f 102
mbed_official 585:a1ed5b41f74f 103 obj->ch = ch_base + obj->pin;
mbed_official 585:a1ed5b41f74f 104 channel_ids[obj->ch] = id;
mbed_official 585:a1ed5b41f74f 105
mbed_official 585:a1ed5b41f74f 106 return 0;
mbed_official 585:a1ed5b41f74f 107 }
mbed_official 585:a1ed5b41f74f 108
mbed_official 585:a1ed5b41f74f 109 void gpio_irq_free(gpio_irq_t *obj) {
mbed_official 585:a1ed5b41f74f 110 channel_ids[obj->ch] = 0;
mbed_official 585:a1ed5b41f74f 111 }
mbed_official 585:a1ed5b41f74f 112
mbed_official 585:a1ed5b41f74f 113 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
mbed_official 585:a1ed5b41f74f 114 PORT_Type *port = (PORT_Type *)(PORTA_BASE + 0x1000 * obj->port);
mbed_official 585:a1ed5b41f74f 115
mbed_official 585:a1ed5b41f74f 116 uint32_t irq_settings = IRQ_DISABLED;
mbed_official 585:a1ed5b41f74f 117
mbed_official 585:a1ed5b41f74f 118 switch (port->PCR[obj->pin] & PORT_PCR_IRQC_MASK) {
mbed_official 585:a1ed5b41f74f 119 case IRQ_DISABLED:
mbed_official 585:a1ed5b41f74f 120 if (enable) {
mbed_official 585:a1ed5b41f74f 121 irq_settings = (event == IRQ_RISE) ? (IRQ_RAISING_EDGE) : (IRQ_FALLING_EDGE);
mbed_official 585:a1ed5b41f74f 122 }
mbed_official 585:a1ed5b41f74f 123 break;
mbed_official 585:a1ed5b41f74f 124
mbed_official 585:a1ed5b41f74f 125 case IRQ_RAISING_EDGE:
mbed_official 585:a1ed5b41f74f 126 if (enable) {
mbed_official 585:a1ed5b41f74f 127 irq_settings = (event == IRQ_RISE) ? (IRQ_RAISING_EDGE) : (IRQ_EITHER_EDGE);
mbed_official 585:a1ed5b41f74f 128 } else {
mbed_official 585:a1ed5b41f74f 129 if (event == IRQ_FALL)
mbed_official 585:a1ed5b41f74f 130 irq_settings = IRQ_RAISING_EDGE;
mbed_official 585:a1ed5b41f74f 131 }
mbed_official 585:a1ed5b41f74f 132 break;
mbed_official 585:a1ed5b41f74f 133
mbed_official 585:a1ed5b41f74f 134 case IRQ_FALLING_EDGE:
mbed_official 585:a1ed5b41f74f 135 if (enable) {
mbed_official 585:a1ed5b41f74f 136 irq_settings = (event == IRQ_FALL) ? (IRQ_FALLING_EDGE) : (IRQ_EITHER_EDGE);
mbed_official 585:a1ed5b41f74f 137 } else {
mbed_official 585:a1ed5b41f74f 138 if (event == IRQ_RISE)
mbed_official 585:a1ed5b41f74f 139 irq_settings = IRQ_FALLING_EDGE;
mbed_official 585:a1ed5b41f74f 140 }
mbed_official 585:a1ed5b41f74f 141 break;
mbed_official 585:a1ed5b41f74f 142
mbed_official 585:a1ed5b41f74f 143 case IRQ_EITHER_EDGE:
mbed_official 585:a1ed5b41f74f 144 if (enable) {
mbed_official 585:a1ed5b41f74f 145 irq_settings = IRQ_EITHER_EDGE;
mbed_official 585:a1ed5b41f74f 146 } else {
mbed_official 585:a1ed5b41f74f 147 irq_settings = (event == IRQ_RISE) ? (IRQ_FALLING_EDGE) : (IRQ_RAISING_EDGE);
mbed_official 585:a1ed5b41f74f 148 }
mbed_official 585:a1ed5b41f74f 149 break;
mbed_official 585:a1ed5b41f74f 150 }
mbed_official 585:a1ed5b41f74f 151
mbed_official 585:a1ed5b41f74f 152 // Interrupt configuration and clear interrupt
mbed_official 585:a1ed5b41f74f 153 port->PCR[obj->pin] = (port->PCR[obj->pin] & ~PORT_PCR_IRQC_MASK) | irq_settings | PORT_PCR_ISF_MASK;
mbed_official 585:a1ed5b41f74f 154 }
mbed_official 585:a1ed5b41f74f 155
mbed_official 585:a1ed5b41f74f 156 void gpio_irq_enable(gpio_irq_t *obj) {
mbed_official 585:a1ed5b41f74f 157 if (obj->port == PortA) {
mbed_official 585:a1ed5b41f74f 158 NVIC_EnableIRQ(PORTA_IRQn);
mbed_official 585:a1ed5b41f74f 159 } else if (obj->port == PortD) {
mbed_official 585:a1ed5b41f74f 160 NVIC_EnableIRQ(PORTD_IRQn);
mbed_official 585:a1ed5b41f74f 161 }
mbed_official 585:a1ed5b41f74f 162 }
mbed_official 585:a1ed5b41f74f 163
mbed_official 585:a1ed5b41f74f 164 void gpio_irq_disable(gpio_irq_t *obj) {
mbed_official 585:a1ed5b41f74f 165 if (obj->port == PortA) {
mbed_official 585:a1ed5b41f74f 166 NVIC_DisableIRQ(PORTA_IRQn);
mbed_official 585:a1ed5b41f74f 167 } else if (obj->port == PortD) {
mbed_official 585:a1ed5b41f74f 168 NVIC_DisableIRQ(PORTD_IRQn);
mbed_official 585:a1ed5b41f74f 169 }
mbed_official 585:a1ed5b41f74f 170 }