shao ziyang / mbed-src-kl05

mbed library sources

Dependents:   frdm_kl05z_gpio_test

Fork of mbed-src by mbed official

targets/hal/TARGET_Freescale/TARGET_KLXX/TARGET_KL46Z/gpio_irq_api.c@251:de9a1e4ffd79, 2014-07-08 (annotated)

Committer:
mbed_official
Date:
Tue Jul 08 14:15:07 2014 +0100
Revision:
251:de9a1e4ffd79
Parent:
250:a49055e7a707
Child:
254:181b5e179739
Synchronized with git revision b0ac1e3485a9aa1cb98d1ca68df9d1cdbcd6ce63



Full URL: https://github.com/mbedmicro/mbed/commit/b0ac1e3485a9aa1cb98d1ca68df9d1cdbcd6ce63/



Revert "error.h -> mbed_error.h"

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 113:65a335a675de 20 #include "gpio_api.h"
mbed_official 251:de9a1e4ffd79 21 #include "error.h"
mbed_official 31:42176bc3c368 22
mbed_official 69:49e45cb70de1 23 #define CHANNEL_NUM 96
mbed_official 31:42176bc3c368 24
mbed_official 31:42176bc3c368 25 static uint32_t channel_ids[CHANNEL_NUM] = {0};
mbed_official 31:42176bc3c368 26 static gpio_irq_handler irq_handler;
mbed_official 31:42176bc3c368 27
mbed_official 31:42176bc3c368 28 #define IRQ_DISABLED (0)
mbed_official 31:42176bc3c368 29 #define IRQ_RAISING_EDGE PORT_PCR_IRQC(9)
mbed_official 31:42176bc3c368 30 #define IRQ_FALLING_EDGE PORT_PCR_IRQC(10)
mbed_official 31:42176bc3c368 31 #define IRQ_EITHER_EDGE PORT_PCR_IRQC(11)
mbed_official 31:42176bc3c368 32
mbed_official 31:42176bc3c368 33 static void handle_interrupt_in(PORT_Type *port, int ch_base) {
mbed_official 31:42176bc3c368 34 uint32_t mask = 0, i;
mbed_official 31:42176bc3c368 35
mbed_official 31:42176bc3c368 36 for (i = 0; i < 32; i++) {
mbed_official 31:42176bc3c368 37 uint32_t pmask = (1 << i);
mbed_official 31:42176bc3c368 38 if (port->ISFR & pmask) {
mbed_official 31:42176bc3c368 39 mask |= pmask;
mbed_official 31:42176bc3c368 40 uint32_t id = channel_ids[ch_base + i];
mbed_official 86:26fc69fd3b6c 41 if (id == 0) {
mbed_official 69:49e45cb70de1 42 continue;
mbed_official 86:26fc69fd3b6c 43 }
mbed_official 31:42176bc3c368 44
mbed_official 31:42176bc3c368 45 FGPIO_Type *gpio;
mbed_official 31:42176bc3c368 46 gpio_irq_event event = IRQ_NONE;
mbed_official 31:42176bc3c368 47 switch (port->PCR[i] & PORT_PCR_IRQC_MASK) {
mbed_official 31:42176bc3c368 48 case IRQ_RAISING_EDGE:
mbed_official 31:42176bc3c368 49 event = IRQ_RISE;
mbed_official 31:42176bc3c368 50 break;
mbed_official 31:42176bc3c368 51
mbed_official 31:42176bc3c368 52 case IRQ_FALLING_EDGE:
mbed_official 31:42176bc3c368 53 event = IRQ_FALL;
mbed_official 31:42176bc3c368 54 break;
mbed_official 31:42176bc3c368 55
mbed_official 31:42176bc3c368 56 case IRQ_EITHER_EDGE:
mbed_official 69:49e45cb70de1 57 if (port == PORTA) {
mbed_official 69:49e45cb70de1 58 gpio = FPTA;
mbed_official 69:49e45cb70de1 59 } else if (port == PORTC) {
mbed_official 69:49e45cb70de1 60 gpio = FPTC;
mbed_official 69:49e45cb70de1 61 } else {
mbed_official 69:49e45cb70de1 62 gpio = FPTD;
mbed_official 69:49e45cb70de1 63 }
mbed_official 31:42176bc3c368 64 event = (gpio->PDIR & pmask) ? (IRQ_RISE) : (IRQ_FALL);
mbed_official 31:42176bc3c368 65 break;
mbed_official 31:42176bc3c368 66 }
mbed_official 31:42176bc3c368 67 if (event != IRQ_NONE)
mbed_official 31:42176bc3c368 68 irq_handler(id, event);
mbed_official 31:42176bc3c368 69 }
mbed_official 31:42176bc3c368 70 }
mbed_official 31:42176bc3c368 71 port->ISFR = mask;
mbed_official 31:42176bc3c368 72 }
mbed_official 31:42176bc3c368 73
mbed_official 69:49e45cb70de1 74 void gpio_irqA(void) {
mbed_official 69:49e45cb70de1 75 handle_interrupt_in(PORTA, 0);
mbed_official 69:49e45cb70de1 76 }
mbed_official 69:49e45cb70de1 77
mbed_official 69:49e45cb70de1 78 /* PORTC and PORTD share same vector */
mbed_official 69:49e45cb70de1 79 void gpio_irqCD(void) {
mbed_official 69:49e45cb70de1 80 if ((SIM->SCGC5 & SIM_SCGC5_PORTC_MASK) && (PORTC->ISFR)) {
mbed_official 69:49e45cb70de1 81 handle_interrupt_in(PORTC, 32);
mbed_official 69:49e45cb70de1 82 } else if ((SIM->SCGC5 & SIM_SCGC5_PORTD_MASK) && (PORTD->ISFR)) {
mbed_official 69:49e45cb70de1 83 handle_interrupt_in(PORTD, 64);
mbed_official 69:49e45cb70de1 84 }
mbed_official 69:49e45cb70de1 85 }
mbed_official 31:42176bc3c368 86
mbed_official 31:42176bc3c368 87 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
mbed_official 69:49e45cb70de1 88 if (pin == NC)
mbed_official 69:49e45cb70de1 89 return -1;
mbed_official 31:42176bc3c368 90
mbed_official 31:42176bc3c368 91 irq_handler = handler;
mbed_official 31:42176bc3c368 92
mbed_official 31:42176bc3c368 93 obj->port = pin >> PORT_SHIFT;
mbed_official 31:42176bc3c368 94 obj->pin = (pin & 0x7F) >> 2;
mbed_official 31:42176bc3c368 95
mbed_official 31:42176bc3c368 96 uint32_t ch_base, vector;
mbed_official 31:42176bc3c368 97 IRQn_Type irq_n;
mbed_official 31:42176bc3c368 98 switch (obj->port) {
mbed_official 31:42176bc3c368 99 case PortA:
mbed_official 31:42176bc3c368 100 ch_base = 0; irq_n = PORTA_IRQn; vector = (uint32_t)gpio_irqA;
mbed_official 31:42176bc3c368 101 break;
mbed_official 31:42176bc3c368 102
mbed_official 69:49e45cb70de1 103 case PortC:
mbed_official 69:49e45cb70de1 104 ch_base = 32; irq_n = PORTC_PORTD_IRQn; vector = (uint32_t)gpio_irqCD;
mbed_official 69:49e45cb70de1 105 break;
mbed_official 69:49e45cb70de1 106
mbed_official 31:42176bc3c368 107 case PortD:
mbed_official 69:49e45cb70de1 108 ch_base = 64; irq_n = PORTC_PORTD_IRQn; vector = (uint32_t)gpio_irqCD;
mbed_official 31:42176bc3c368 109 break;
mbed_official 31:42176bc3c368 110
mbed_official 31:42176bc3c368 111 default:
mbed_official 158:3121b9889f7b 112 error("gpio_irq only supported on port A,C and D");
mbed_official 31:42176bc3c368 113 break;
mbed_official 31:42176bc3c368 114 }
mbed_official 31:42176bc3c368 115 NVIC_SetVector(irq_n, vector);
mbed_official 31:42176bc3c368 116 NVIC_EnableIRQ(irq_n);
mbed_official 31:42176bc3c368 117
mbed_official 31:42176bc3c368 118 obj->ch = ch_base + obj->pin;
mbed_official 31:42176bc3c368 119 channel_ids[obj->ch] = id;
mbed_official 31:42176bc3c368 120
mbed_official 31:42176bc3c368 121 return 0;
mbed_official 31:42176bc3c368 122 }
mbed_official 31:42176bc3c368 123
mbed_official 31:42176bc3c368 124 void gpio_irq_free(gpio_irq_t *obj) {
mbed_official 31:42176bc3c368 125 channel_ids[obj->ch] = 0;
mbed_official 31:42176bc3c368 126 }
mbed_official 31:42176bc3c368 127
mbed_official 31:42176bc3c368 128 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
mbed_official 31:42176bc3c368 129 PORT_Type *port = (PORT_Type *)(PORTA_BASE + 0x1000 * obj->port);
mbed_official 31:42176bc3c368 130
mbed_official 31:42176bc3c368 131 uint32_t irq_settings = IRQ_DISABLED;
mbed_official 31:42176bc3c368 132
mbed_official 31:42176bc3c368 133 switch (port->PCR[obj->pin] & PORT_PCR_IRQC_MASK) {
mbed_official 31:42176bc3c368 134 case IRQ_DISABLED:
mbed_official 31:42176bc3c368 135 if (enable) {
mbed_official 31:42176bc3c368 136 irq_settings = (event == IRQ_RISE) ? (IRQ_RAISING_EDGE) : (IRQ_FALLING_EDGE);
mbed_official 31:42176bc3c368 137 }
mbed_official 31:42176bc3c368 138 break;
mbed_official 31:42176bc3c368 139
mbed_official 31:42176bc3c368 140 case IRQ_RAISING_EDGE:
mbed_official 31:42176bc3c368 141 if (enable) {
mbed_official 31:42176bc3c368 142 irq_settings = (event == IRQ_RISE) ? (IRQ_RAISING_EDGE) : (IRQ_EITHER_EDGE);
mbed_official 31:42176bc3c368 143 } else {
mbed_official 31:42176bc3c368 144 if (event == IRQ_FALL)
mbed_official 31:42176bc3c368 145 irq_settings = IRQ_RAISING_EDGE;
mbed_official 31:42176bc3c368 146 }
mbed_official 31:42176bc3c368 147 break;
mbed_official 31:42176bc3c368 148
mbed_official 31:42176bc3c368 149 case IRQ_FALLING_EDGE:
mbed_official 31:42176bc3c368 150 if (enable) {
mbed_official 31:42176bc3c368 151 irq_settings = (event == IRQ_FALL) ? (IRQ_FALLING_EDGE) : (IRQ_EITHER_EDGE);
mbed_official 31:42176bc3c368 152 } else {
mbed_official 31:42176bc3c368 153 if (event == IRQ_RISE)
mbed_official 31:42176bc3c368 154 irq_settings = IRQ_FALLING_EDGE;
mbed_official 31:42176bc3c368 155 }
mbed_official 31:42176bc3c368 156 break;
mbed_official 31:42176bc3c368 157
mbed_official 31:42176bc3c368 158 case IRQ_EITHER_EDGE:
mbed_official 31:42176bc3c368 159 if (enable) {
mbed_official 31:42176bc3c368 160 irq_settings = IRQ_EITHER_EDGE;
mbed_official 31:42176bc3c368 161 } else {
mbed_official 31:42176bc3c368 162 irq_settings = (event == IRQ_RISE) ? (IRQ_FALLING_EDGE) : (IRQ_RAISING_EDGE);
mbed_official 31:42176bc3c368 163 }
mbed_official 31:42176bc3c368 164 break;
mbed_official 31:42176bc3c368 165 }
mbed_official 31:42176bc3c368 166
mbed_official 31:42176bc3c368 167 // Interrupt configuration and clear interrupt
mbed_official 31:42176bc3c368 168 port->PCR[obj->pin] = (port->PCR[obj->pin] & ~PORT_PCR_IRQC_MASK) | irq_settings | PORT_PCR_ISF_MASK;
mbed_official 31:42176bc3c368 169 }
mbed_official 35:371630885ad6 170
mbed_official 35:371630885ad6 171 void gpio_irq_enable(gpio_irq_t *obj) {
mbed_official 35:371630885ad6 172 if (obj->port == PortA) {
mbed_official 35:371630885ad6 173 NVIC_EnableIRQ(PORTA_IRQn);
mbed_official 69:49e45cb70de1 174 } else {
mbed_official 69:49e45cb70de1 175 NVIC_EnableIRQ(PORTC_PORTD_IRQn);
mbed_official 35:371630885ad6 176 }
mbed_official 35:371630885ad6 177 }
mbed_official 35:371630885ad6 178
mbed_official 35:371630885ad6 179 void gpio_irq_disable(gpio_irq_t *obj) {
mbed_official 35:371630885ad6 180 if (obj->port == PortA) {
mbed_official 35:371630885ad6 181 NVIC_DisableIRQ(PORTA_IRQn);
mbed_official 69:49e45cb70de1 182 } else {
mbed_official 69:49e45cb70de1 183 NVIC_DisableIRQ(PORTC_PORTD_IRQn);
mbed_official 35:371630885ad6 184 }
mbed_official 35:371630885ad6 185 }