mbed official / mbed-src

mbed library sources

Dependents:   Encrypted my_mbed lklk CyaSSL_DTLS_Cellular ... more

Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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_KL46Z/gpio_irq_api.c@31:42176bc3c368, 2013-09-25 (annotated)

Committer:
mbed_official
Date:
Wed Sep 25 11:30:05 2013 +0100
Revision:
31:42176bc3c368
Child:
35:371630885ad6
Synchronized with git revision f580c008b139a952d38ac5c7c53bbae375739c67

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 31:42176bc3c368 22 #define CHANNEL_NUM 64
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 31:42176bc3c368 40 if (id == 0) continue;
mbed_official 31:42176bc3c368 41
mbed_official 31:42176bc3c368 42 FGPIO_Type *gpio;
mbed_official 31:42176bc3c368 43 gpio_irq_event event = IRQ_NONE;
mbed_official 31:42176bc3c368 44 switch (port->PCR[i] & PORT_PCR_IRQC_MASK) {
mbed_official 31:42176bc3c368 45 case IRQ_RAISING_EDGE:
mbed_official 31:42176bc3c368 46 event = IRQ_RISE;
mbed_official 31:42176bc3c368 47 break;
mbed_official 31:42176bc3c368 48
mbed_official 31:42176bc3c368 49 case IRQ_FALLING_EDGE:
mbed_official 31:42176bc3c368 50 event = IRQ_FALL;
mbed_official 31:42176bc3c368 51 break;
mbed_official 31:42176bc3c368 52
mbed_official 31:42176bc3c368 53 case IRQ_EITHER_EDGE:
mbed_official 31:42176bc3c368 54 gpio = (port == PORTA) ? (FPTA) : (FPTD);
mbed_official 31:42176bc3c368 55 event = (gpio->PDIR & pmask) ? (IRQ_RISE) : (IRQ_FALL);
mbed_official 31:42176bc3c368 56 break;
mbed_official 31:42176bc3c368 57 }
mbed_official 31:42176bc3c368 58 if (event != IRQ_NONE)
mbed_official 31:42176bc3c368 59 irq_handler(id, event);
mbed_official 31:42176bc3c368 60 }
mbed_official 31:42176bc3c368 61 }
mbed_official 31:42176bc3c368 62 port->ISFR = mask;
mbed_official 31:42176bc3c368 63 }
mbed_official 31:42176bc3c368 64
mbed_official 31:42176bc3c368 65 void gpio_irqA(void) {handle_interrupt_in(PORTA, 0);}
mbed_official 31:42176bc3c368 66 void gpio_irqD(void) {handle_interrupt_in(PORTD, 32);}
mbed_official 31:42176bc3c368 67
mbed_official 31:42176bc3c368 68 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
mbed_official 31:42176bc3c368 69 if (pin == NC) return -1;
mbed_official 31:42176bc3c368 70
mbed_official 31:42176bc3c368 71 irq_handler = handler;
mbed_official 31:42176bc3c368 72
mbed_official 31:42176bc3c368 73 obj->port = pin >> PORT_SHIFT;
mbed_official 31:42176bc3c368 74 obj->pin = (pin & 0x7F) >> 2;
mbed_official 31:42176bc3c368 75
mbed_official 31:42176bc3c368 76 uint32_t ch_base, vector;
mbed_official 31:42176bc3c368 77 IRQn_Type irq_n;
mbed_official 31:42176bc3c368 78 switch (obj->port) {
mbed_official 31:42176bc3c368 79 case PortA:
mbed_official 31:42176bc3c368 80 ch_base = 0; irq_n = PORTA_IRQn; vector = (uint32_t)gpio_irqA;
mbed_official 31:42176bc3c368 81 break;
mbed_official 31:42176bc3c368 82
mbed_official 31:42176bc3c368 83 case PortD:
mbed_official 31:42176bc3c368 84 ch_base = 32; irq_n = PORTD_IRQn; vector = (uint32_t)gpio_irqD;
mbed_official 31:42176bc3c368 85 break;
mbed_official 31:42176bc3c368 86
mbed_official 31:42176bc3c368 87 default:
mbed_official 31:42176bc3c368 88 error("gpio_irq only supported on port A and D\n");
mbed_official 31:42176bc3c368 89 break;
mbed_official 31:42176bc3c368 90 }
mbed_official 31:42176bc3c368 91 NVIC_SetVector(irq_n, vector);
mbed_official 31:42176bc3c368 92 NVIC_EnableIRQ(irq_n);
mbed_official 31:42176bc3c368 93
mbed_official 31:42176bc3c368 94 obj->ch = ch_base + obj->pin;
mbed_official 31:42176bc3c368 95 channel_ids[obj->ch] = id;
mbed_official 31:42176bc3c368 96
mbed_official 31:42176bc3c368 97 return 0;
mbed_official 31:42176bc3c368 98 }
mbed_official 31:42176bc3c368 99
mbed_official 31:42176bc3c368 100 void gpio_irq_free(gpio_irq_t *obj) {
mbed_official 31:42176bc3c368 101 channel_ids[obj->ch] = 0;
mbed_official 31:42176bc3c368 102 }
mbed_official 31:42176bc3c368 103
mbed_official 31:42176bc3c368 104 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
mbed_official 31:42176bc3c368 105 PORT_Type *port = (PORT_Type *)(PORTA_BASE + 0x1000 * obj->port);
mbed_official 31:42176bc3c368 106
mbed_official 31:42176bc3c368 107 uint32_t irq_settings = IRQ_DISABLED;
mbed_official 31:42176bc3c368 108
mbed_official 31:42176bc3c368 109 switch (port->PCR[obj->pin] & PORT_PCR_IRQC_MASK) {
mbed_official 31:42176bc3c368 110 case IRQ_DISABLED:
mbed_official 31:42176bc3c368 111 if (enable) {
mbed_official 31:42176bc3c368 112 irq_settings = (event == IRQ_RISE) ? (IRQ_RAISING_EDGE) : (IRQ_FALLING_EDGE);
mbed_official 31:42176bc3c368 113 }
mbed_official 31:42176bc3c368 114 break;
mbed_official 31:42176bc3c368 115
mbed_official 31:42176bc3c368 116 case IRQ_RAISING_EDGE:
mbed_official 31:42176bc3c368 117 if (enable) {
mbed_official 31:42176bc3c368 118 irq_settings = (event == IRQ_RISE) ? (IRQ_RAISING_EDGE) : (IRQ_EITHER_EDGE);
mbed_official 31:42176bc3c368 119 } else {
mbed_official 31:42176bc3c368 120 if (event == IRQ_FALL)
mbed_official 31:42176bc3c368 121 irq_settings = IRQ_RAISING_EDGE;
mbed_official 31:42176bc3c368 122 }
mbed_official 31:42176bc3c368 123 break;
mbed_official 31:42176bc3c368 124
mbed_official 31:42176bc3c368 125 case IRQ_FALLING_EDGE:
mbed_official 31:42176bc3c368 126 if (enable) {
mbed_official 31:42176bc3c368 127 irq_settings = (event == IRQ_FALL) ? (IRQ_FALLING_EDGE) : (IRQ_EITHER_EDGE);
mbed_official 31:42176bc3c368 128 } else {
mbed_official 31:42176bc3c368 129 if (event == IRQ_RISE)
mbed_official 31:42176bc3c368 130 irq_settings = IRQ_FALLING_EDGE;
mbed_official 31:42176bc3c368 131 }
mbed_official 31:42176bc3c368 132 break;
mbed_official 31:42176bc3c368 133
mbed_official 31:42176bc3c368 134 case IRQ_EITHER_EDGE:
mbed_official 31:42176bc3c368 135 if (enable) {
mbed_official 31:42176bc3c368 136 irq_settings = IRQ_EITHER_EDGE;
mbed_official 31:42176bc3c368 137 } else {
mbed_official 31:42176bc3c368 138 irq_settings = (event == IRQ_RISE) ? (IRQ_FALLING_EDGE) : (IRQ_RAISING_EDGE);
mbed_official 31:42176bc3c368 139 }
mbed_official 31:42176bc3c368 140 break;
mbed_official 31:42176bc3c368 141 }
mbed_official 31:42176bc3c368 142
mbed_official 31:42176bc3c368 143 // Interrupt configuration and clear interrupt
mbed_official 31:42176bc3c368 144 port->PCR[obj->pin] = (port->PCR[obj->pin] & ~PORT_PCR_IRQC_MASK) | irq_settings | PORT_PCR_ISF_MASK;
mbed_official 31:42176bc3c368 145 }