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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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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_KL46Z/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 31:42176bc3c368 1 /* mbed Microcontroller Library
mbed_official 31:42176bc3c368 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 31:42176bc3c368 3 *
mbed_official 31:42176bc3c368 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 31:42176bc3c368 5 * you may not use this file except in compliance with the License.
mbed_official 31:42176bc3c368 6 * You may obtain a copy of the License at
mbed_official 31:42176bc3c368 7 *
mbed_official 31:42176bc3c368 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 31:42176bc3c368 9 *
mbed_official 31:42176bc3c368 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 31:42176bc3c368 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 31:42176bc3c368 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 31:42176bc3c368 13 * See the License for the specific language governing permissions and
mbed_official 31:42176bc3c368 14 * limitations under the License.
mbed_official 31:42176bc3c368 15 */
mbed_official 31:42176bc3c368 16 #include <stddef.h>
mbed_official 31:42176bc3c368 17 #include "cmsis.h"
mbed_official 31:42176bc3c368 18
mbed_official 31:42176bc3c368 19 #include "gpio_irq_api.h"
mbed_official 31:42176bc3c368 20 #include "error.h"
mbed_official 31:42176bc3c368 21
mbed_official 69:49e45cb70de1 22 #define CHANNEL_NUM 96
mbed_official 31:42176bc3c368 23
mbed_official 31:42176bc3c368 24 static uint32_t channel_ids[CHANNEL_NUM] = {0};
mbed_official 31:42176bc3c368 25 static gpio_irq_handler irq_handler;
mbed_official 31:42176bc3c368 26
mbed_official 31:42176bc3c368 27 #define IRQ_DISABLED (0)
mbed_official 31:42176bc3c368 28 #define IRQ_RAISING_EDGE PORT_PCR_IRQC(9)
mbed_official 31:42176bc3c368 29 #define IRQ_FALLING_EDGE PORT_PCR_IRQC(10)
mbed_official 31:42176bc3c368 30 #define IRQ_EITHER_EDGE PORT_PCR_IRQC(11)
mbed_official 31:42176bc3c368 31
mbed_official 31:42176bc3c368 32 static void handle_interrupt_in(PORT_Type *port, int ch_base) {
mbed_official 31:42176bc3c368 33 uint32_t mask = 0, i;
mbed_official 31:42176bc3c368 34
mbed_official 31:42176bc3c368 35 for (i = 0; i < 32; i++) {
mbed_official 31:42176bc3c368 36 uint32_t pmask = (1 << i);
mbed_official 31:42176bc3c368 37 if (port->ISFR & pmask) {
mbed_official 31:42176bc3c368 38 mask |= pmask;
mbed_official 31:42176bc3c368 39 uint32_t id = channel_ids[ch_base + i];
mbed_official 86:26fc69fd3b6c 40 if (id == 0) {
mbed_official 69:49e45cb70de1 41 continue;
mbed_official 86:26fc69fd3b6c 42 }
mbed_official 31:42176bc3c368 43
mbed_official 31:42176bc3c368 44 FGPIO_Type *gpio;
mbed_official 31:42176bc3c368 45 gpio_irq_event event = IRQ_NONE;
mbed_official 31:42176bc3c368 46 switch (port->PCR[i] & PORT_PCR_IRQC_MASK) {
mbed_official 31:42176bc3c368 47 case IRQ_RAISING_EDGE:
mbed_official 31:42176bc3c368 48 event = IRQ_RISE;
mbed_official 31:42176bc3c368 49 break;
mbed_official 31:42176bc3c368 50
mbed_official 31:42176bc3c368 51 case IRQ_FALLING_EDGE:
mbed_official 31:42176bc3c368 52 event = IRQ_FALL;
mbed_official 31:42176bc3c368 53 break;
mbed_official 31:42176bc3c368 54
mbed_official 31:42176bc3c368 55 case IRQ_EITHER_EDGE:
mbed_official 69:49e45cb70de1 56 if (port == PORTA) {
mbed_official 69:49e45cb70de1 57 gpio = FPTA;
mbed_official 69:49e45cb70de1 58 } else if (port == PORTC) {
mbed_official 69:49e45cb70de1 59 gpio = FPTC;
mbed_official 69:49e45cb70de1 60 } else {
mbed_official 69:49e45cb70de1 61 gpio = FPTD;
mbed_official 69:49e45cb70de1 62 }
mbed_official 31:42176bc3c368 63 event = (gpio->PDIR & pmask) ? (IRQ_RISE) : (IRQ_FALL);
mbed_official 31:42176bc3c368 64 break;
mbed_official 31:42176bc3c368 65 }
mbed_official 31:42176bc3c368 66 if (event != IRQ_NONE)
mbed_official 31:42176bc3c368 67 irq_handler(id, event);
mbed_official 31:42176bc3c368 68 }
mbed_official 31:42176bc3c368 69 }
mbed_official 31:42176bc3c368 70 port->ISFR = mask;
mbed_official 31:42176bc3c368 71 }
mbed_official 31:42176bc3c368 72
mbed_official 69:49e45cb70de1 73 void gpio_irqA(void) {
mbed_official 69:49e45cb70de1 74 handle_interrupt_in(PORTA, 0);
mbed_official 69:49e45cb70de1 75 }
mbed_official 69:49e45cb70de1 76
mbed_official 69:49e45cb70de1 77 /* PORTC and PORTD share same vector */
mbed_official 69:49e45cb70de1 78 void gpio_irqCD(void) {
mbed_official 69:49e45cb70de1 79 if ((SIM->SCGC5 & SIM_SCGC5_PORTC_MASK) && (PORTC->ISFR)) {
mbed_official 69:49e45cb70de1 80 handle_interrupt_in(PORTC, 32);
mbed_official 69:49e45cb70de1 81 } else if ((SIM->SCGC5 & SIM_SCGC5_PORTD_MASK) && (PORTD->ISFR)) {
mbed_official 69:49e45cb70de1 82 handle_interrupt_in(PORTD, 64);
mbed_official 69:49e45cb70de1 83 }
mbed_official 69:49e45cb70de1 84 }
mbed_official 31:42176bc3c368 85
mbed_official 31:42176bc3c368 86 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
mbed_official 69:49e45cb70de1 87 if (pin == NC)
mbed_official 69:49e45cb70de1 88 return -1;
mbed_official 31:42176bc3c368 89
mbed_official 31:42176bc3c368 90 irq_handler = handler;
mbed_official 31:42176bc3c368 91
mbed_official 31:42176bc3c368 92 obj->port = pin >> PORT_SHIFT;
mbed_official 31:42176bc3c368 93 obj->pin = (pin & 0x7F) >> 2;
mbed_official 31:42176bc3c368 94
mbed_official 31:42176bc3c368 95 uint32_t ch_base, vector;
mbed_official 31:42176bc3c368 96 IRQn_Type irq_n;
mbed_official 31:42176bc3c368 97 switch (obj->port) {
mbed_official 31:42176bc3c368 98 case PortA:
mbed_official 31:42176bc3c368 99 ch_base = 0; irq_n = PORTA_IRQn; vector = (uint32_t)gpio_irqA;
mbed_official 31:42176bc3c368 100 break;
mbed_official 31:42176bc3c368 101
mbed_official 69:49e45cb70de1 102 case PortC:
mbed_official 69:49e45cb70de1 103 ch_base = 32; irq_n = PORTC_PORTD_IRQn; vector = (uint32_t)gpio_irqCD;
mbed_official 69:49e45cb70de1 104 break;
mbed_official 69:49e45cb70de1 105
mbed_official 31:42176bc3c368 106 case PortD:
mbed_official 69:49e45cb70de1 107 ch_base = 64; irq_n = PORTC_PORTD_IRQn; vector = (uint32_t)gpio_irqCD;
mbed_official 31:42176bc3c368 108 break;
mbed_official 31:42176bc3c368 109
mbed_official 31:42176bc3c368 110 default:
mbed_official 69:49e45cb70de1 111 error("gpio_irq only supported on port A,C and D\n");
mbed_official 31:42176bc3c368 112 break;
mbed_official 31:42176bc3c368 113 }
mbed_official 31:42176bc3c368 114 NVIC_SetVector(irq_n, vector);
mbed_official 31:42176bc3c368 115 NVIC_EnableIRQ(irq_n);
mbed_official 31:42176bc3c368 116
mbed_official 31:42176bc3c368 117 obj->ch = ch_base + obj->pin;
mbed_official 31:42176bc3c368 118 channel_ids[obj->ch] = id;
mbed_official 31:42176bc3c368 119
mbed_official 31:42176bc3c368 120 return 0;
mbed_official 31:42176bc3c368 121 }
mbed_official 31:42176bc3c368 122
mbed_official 31:42176bc3c368 123 void gpio_irq_free(gpio_irq_t *obj) {
mbed_official 31:42176bc3c368 124 channel_ids[obj->ch] = 0;
mbed_official 31:42176bc3c368 125 }
mbed_official 31:42176bc3c368 126
mbed_official 31:42176bc3c368 127 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
mbed_official 31:42176bc3c368 128 PORT_Type *port = (PORT_Type *)(PORTA_BASE + 0x1000 * obj->port);
mbed_official 31:42176bc3c368 129
mbed_official 31:42176bc3c368 130 uint32_t irq_settings = IRQ_DISABLED;
mbed_official 31:42176bc3c368 131
mbed_official 31:42176bc3c368 132 switch (port->PCR[obj->pin] & PORT_PCR_IRQC_MASK) {
mbed_official 31:42176bc3c368 133 case IRQ_DISABLED:
mbed_official 31:42176bc3c368 134 if (enable) {
mbed_official 31:42176bc3c368 135 irq_settings = (event == IRQ_RISE) ? (IRQ_RAISING_EDGE) : (IRQ_FALLING_EDGE);
mbed_official 31:42176bc3c368 136 }
mbed_official 31:42176bc3c368 137 break;
mbed_official 31:42176bc3c368 138
mbed_official 31:42176bc3c368 139 case IRQ_RAISING_EDGE:
mbed_official 31:42176bc3c368 140 if (enable) {
mbed_official 31:42176bc3c368 141 irq_settings = (event == IRQ_RISE) ? (IRQ_RAISING_EDGE) : (IRQ_EITHER_EDGE);
mbed_official 31:42176bc3c368 142 } else {
mbed_official 31:42176bc3c368 143 if (event == IRQ_FALL)
mbed_official 31:42176bc3c368 144 irq_settings = IRQ_RAISING_EDGE;
mbed_official 31:42176bc3c368 145 }
mbed_official 31:42176bc3c368 146 break;
mbed_official 31:42176bc3c368 147
mbed_official 31:42176bc3c368 148 case IRQ_FALLING_EDGE:
mbed_official 31:42176bc3c368 149 if (enable) {
mbed_official 31:42176bc3c368 150 irq_settings = (event == IRQ_FALL) ? (IRQ_FALLING_EDGE) : (IRQ_EITHER_EDGE);
mbed_official 31:42176bc3c368 151 } else {
mbed_official 31:42176bc3c368 152 if (event == IRQ_RISE)
mbed_official 31:42176bc3c368 153 irq_settings = IRQ_FALLING_EDGE;
mbed_official 31:42176bc3c368 154 }
mbed_official 31:42176bc3c368 155 break;
mbed_official 31:42176bc3c368 156
mbed_official 31:42176bc3c368 157 case IRQ_EITHER_EDGE:
mbed_official 31:42176bc3c368 158 if (enable) {
mbed_official 31:42176bc3c368 159 irq_settings = IRQ_EITHER_EDGE;
mbed_official 31:42176bc3c368 160 } else {
mbed_official 31:42176bc3c368 161 irq_settings = (event == IRQ_RISE) ? (IRQ_FALLING_EDGE) : (IRQ_RAISING_EDGE);
mbed_official 31:42176bc3c368 162 }
mbed_official 31:42176bc3c368 163 break;
mbed_official 31:42176bc3c368 164 }
mbed_official 31:42176bc3c368 165
mbed_official 31:42176bc3c368 166 // Interrupt configuration and clear interrupt
mbed_official 31:42176bc3c368 167 port->PCR[obj->pin] = (port->PCR[obj->pin] & ~PORT_PCR_IRQC_MASK) | irq_settings | PORT_PCR_ISF_MASK;
mbed_official 31:42176bc3c368 168 }
mbed_official 35:371630885ad6 169
mbed_official 35:371630885ad6 170 void gpio_irq_enable(gpio_irq_t *obj) {
mbed_official 35:371630885ad6 171 if (obj->port == PortA) {
mbed_official 35:371630885ad6 172 NVIC_EnableIRQ(PORTA_IRQn);
mbed_official 69:49e45cb70de1 173 } else {
mbed_official 69:49e45cb70de1 174 NVIC_EnableIRQ(PORTC_PORTD_IRQn);
mbed_official 35:371630885ad6 175 }
mbed_official 35:371630885ad6 176 }
mbed_official 35:371630885ad6 177
mbed_official 35:371630885ad6 178 void gpio_irq_disable(gpio_irq_t *obj) {
mbed_official 35:371630885ad6 179 if (obj->port == PortA) {
mbed_official 35:371630885ad6 180 NVIC_DisableIRQ(PORTA_IRQn);
mbed_official 69:49e45cb70de1 181 } else {
mbed_official 69:49e45cb70de1 182 NVIC_DisableIRQ(PORTC_PORTD_IRQn);
mbed_official 35:371630885ad6 183 }
mbed_official 35:371630885ad6 184 }
mbed_official 86:26fc69fd3b6c 185
mbed_official 86:26fc69fd3b6c 186 // Change the NMI pin to an input. This allows NMI pin to
mbed_official 86:26fc69fd3b6c 187 // be used as a low power mode wakeup. The application will
mbed_official 86:26fc69fd3b6c 188 // need to change the pin back to NMI_b or wakeup only occurs once!
mbed_official 86:26fc69fd3b6c 189 extern void gpio_init(gpio_t *obj, PinName pin, PinDirection direction);
mbed_official 86:26fc69fd3b6c 190 void NMI_Handler(void)
mbed_official 86:26fc69fd3b6c 191 {
mbed_official 86:26fc69fd3b6c 192 gpio_t gpio;
mbed_official 86:26fc69fd3b6c 193 gpio_init(&gpio, PTA4, PIN_INPUT);
mbed_official 86:26fc69fd3b6c 194 }