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_K20D50M/gpio_irq_api.c@255:20b371a9491b, 2014-07-11 (annotated)

Committer:
mbed_official
Date:
Fri Jul 11 10:00:08 2014 +0100
Revision:
255:20b371a9491b
Child:
285:31249416b6f9
Synchronized with git revision bbf5cbc71510e72033aaacbd76c3f127b70f08b6



Full URL: https://github.com/mbedmicro/mbed/commit/bbf5cbc71510e72033aaacbd76c3f127b70f08b6/



[K20D50M] K20D5M -> K20D50M

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 255:20b371a9491b 1 /* mbed Microcontroller Library
mbed_official 255:20b371a9491b 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 255:20b371a9491b 3 *
mbed_official 255:20b371a9491b 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 255:20b371a9491b 5 * you may not use this file except in compliance with the License.
mbed_official 255:20b371a9491b 6 * You may obtain a copy of the License at
mbed_official 255:20b371a9491b 7 *
mbed_official 255:20b371a9491b 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 255:20b371a9491b 9 *
mbed_official 255:20b371a9491b 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 255:20b371a9491b 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 255:20b371a9491b 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 255:20b371a9491b 13 * See the License for the specific language governing permissions and
mbed_official 255:20b371a9491b 14 * limitations under the License.
mbed_official 255:20b371a9491b 15 */
mbed_official 255:20b371a9491b 16 #include <stddef.h>
mbed_official 255:20b371a9491b 17 #include "cmsis.h"
mbed_official 255:20b371a9491b 18
mbed_official 255:20b371a9491b 19 #include "gpio_irq_api.h"
mbed_official 255:20b371a9491b 20 #include "error.h"
mbed_official 255:20b371a9491b 21
mbed_official 255:20b371a9491b 22 #define CHANNEL_NUM 160
mbed_official 255:20b371a9491b 23
mbed_official 255:20b371a9491b 24 static uint32_t channel_ids[CHANNEL_NUM] = {0};
mbed_official 255:20b371a9491b 25 static gpio_irq_handler irq_handler;
mbed_official 255:20b371a9491b 26
mbed_official 255:20b371a9491b 27 #define IRQ_DISABLED (0)
mbed_official 255:20b371a9491b 28 #define IRQ_RAISING_EDGE PORT_PCR_IRQC(9)
mbed_official 255:20b371a9491b 29 #define IRQ_FALLING_EDGE PORT_PCR_IRQC(10)
mbed_official 255:20b371a9491b 30 #define IRQ_EITHER_EDGE PORT_PCR_IRQC(11)
mbed_official 255:20b371a9491b 31
mbed_official 255:20b371a9491b 32 static void handle_interrupt_in(PORT_Type *port, int ch_base) {
mbed_official 255:20b371a9491b 33 uint32_t isfr;
mbed_official 255:20b371a9491b 34 uint32_t pin;
mbed_official 255:20b371a9491b 35
mbed_official 255:20b371a9491b 36 while ((isfr = port->ISFR) != 0) {
mbed_official 255:20b371a9491b 37 pin = 31 - __CLZ(isfr);
mbed_official 255:20b371a9491b 38 uint32_t id = channel_ids[ch_base + pin];
mbed_official 255:20b371a9491b 39 if (id == 0) {
mbed_official 255:20b371a9491b 40 continue;
mbed_official 255:20b371a9491b 41 }
mbed_official 255:20b371a9491b 42
mbed_official 255:20b371a9491b 43 GPIO_Type *gpio = PTA;
mbed_official 255:20b371a9491b 44 gpio_irq_event event = IRQ_NONE;
mbed_official 255:20b371a9491b 45 uint32_t port_num = (port - PORTA) >> 12;
mbed_official 255:20b371a9491b 46
mbed_official 255:20b371a9491b 47 switch (port->PCR[pin] & PORT_PCR_IRQC_MASK) {
mbed_official 255:20b371a9491b 48 case IRQ_RAISING_EDGE:
mbed_official 255:20b371a9491b 49 event = IRQ_RISE;
mbed_official 255:20b371a9491b 50 break;
mbed_official 255:20b371a9491b 51 case IRQ_FALLING_EDGE:
mbed_official 255:20b371a9491b 52 event = IRQ_FALL;
mbed_official 255:20b371a9491b 53 break;
mbed_official 255:20b371a9491b 54 case IRQ_EITHER_EDGE:
mbed_official 255:20b371a9491b 55 gpio += (port_num * 0x40);
mbed_official 255:20b371a9491b 56 event = (gpio->PDIR & (1 << pin)) ? (IRQ_RISE) : (IRQ_FALL);
mbed_official 255:20b371a9491b 57 break;
mbed_official 255:20b371a9491b 58 }
mbed_official 255:20b371a9491b 59 if (event != IRQ_NONE) {
mbed_official 255:20b371a9491b 60 irq_handler(id, event);
mbed_official 255:20b371a9491b 61 }
mbed_official 255:20b371a9491b 62 port->ISFR = 1 << pin;
mbed_official 255:20b371a9491b 63 }
mbed_official 255:20b371a9491b 64 }
mbed_official 255:20b371a9491b 65
mbed_official 255:20b371a9491b 66 void gpio_irqA(void) {
mbed_official 255:20b371a9491b 67 handle_interrupt_in(PORTA, 0);
mbed_official 255:20b371a9491b 68 }
mbed_official 255:20b371a9491b 69
mbed_official 255:20b371a9491b 70 void gpio_irqB(void)
mbed_official 255:20b371a9491b 71 {
mbed_official 255:20b371a9491b 72 handle_interrupt_in(PORTB, 32);
mbed_official 255:20b371a9491b 73 }
mbed_official 255:20b371a9491b 74
mbed_official 255:20b371a9491b 75 void gpio_irqC(void)
mbed_official 255:20b371a9491b 76 {
mbed_official 255:20b371a9491b 77 handle_interrupt_in(PORTC, 64);
mbed_official 255:20b371a9491b 78 }
mbed_official 255:20b371a9491b 79
mbed_official 255:20b371a9491b 80 void gpio_irqD(void)
mbed_official 255:20b371a9491b 81 {
mbed_official 255:20b371a9491b 82 handle_interrupt_in(PORTD, 96);
mbed_official 255:20b371a9491b 83 }
mbed_official 255:20b371a9491b 84
mbed_official 255:20b371a9491b 85 void gpio_irqE(void)
mbed_official 255:20b371a9491b 86 {
mbed_official 255:20b371a9491b 87 handle_interrupt_in(PORTE, 128);
mbed_official 255:20b371a9491b 88 }
mbed_official 255:20b371a9491b 89
mbed_official 255:20b371a9491b 90
mbed_official 255:20b371a9491b 91 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
mbed_official 255:20b371a9491b 92 if (pin == NC)
mbed_official 255:20b371a9491b 93 return -1;
mbed_official 255:20b371a9491b 94
mbed_official 255:20b371a9491b 95 irq_handler = handler;
mbed_official 255:20b371a9491b 96
mbed_official 255:20b371a9491b 97 obj->port = pin >> PORT_SHIFT;
mbed_official 255:20b371a9491b 98 obj->pin = (pin & 0x7F) >> 2;
mbed_official 255:20b371a9491b 99
mbed_official 255:20b371a9491b 100 uint32_t ch_base, vector;
mbed_official 255:20b371a9491b 101 IRQn_Type irq_n;
mbed_official 255:20b371a9491b 102 switch (obj->port) {
mbed_official 255:20b371a9491b 103 case PortA:
mbed_official 255:20b371a9491b 104 ch_base = 0;
mbed_official 255:20b371a9491b 105 irq_n = PORTA_IRQn;
mbed_official 255:20b371a9491b 106 vector = (uint32_t)gpio_irqA;
mbed_official 255:20b371a9491b 107 break;
mbed_official 255:20b371a9491b 108 case PortB:
mbed_official 255:20b371a9491b 109 ch_base = 32;
mbed_official 255:20b371a9491b 110 irq_n = PORTB_IRQn;
mbed_official 255:20b371a9491b 111 vector = (uint32_t)gpio_irqB;
mbed_official 255:20b371a9491b 112 break;
mbed_official 255:20b371a9491b 113 case PortC:
mbed_official 255:20b371a9491b 114 ch_base = 64;
mbed_official 255:20b371a9491b 115 irq_n = PORTC_IRQn;
mbed_official 255:20b371a9491b 116 vector = (uint32_t)gpio_irqC;
mbed_official 255:20b371a9491b 117 break;
mbed_official 255:20b371a9491b 118 case PortD:
mbed_official 255:20b371a9491b 119 ch_base = 96;
mbed_official 255:20b371a9491b 120 irq_n = PORTD_IRQn; vector = (uint32_t)gpio_irqD;
mbed_official 255:20b371a9491b 121 break;
mbed_official 255:20b371a9491b 122 case PortE:
mbed_official 255:20b371a9491b 123 ch_base = 128;
mbed_official 255:20b371a9491b 124 irq_n = PORTE_IRQn;
mbed_official 255:20b371a9491b 125 vector = (uint32_t)gpio_irqE;
mbed_official 255:20b371a9491b 126 break;
mbed_official 255:20b371a9491b 127
mbed_official 255:20b371a9491b 128 default:
mbed_official 255:20b371a9491b 129 error("gpio_irq only supported on port A-E.");
mbed_official 255:20b371a9491b 130 break;
mbed_official 255:20b371a9491b 131 }
mbed_official 255:20b371a9491b 132 NVIC_SetVector(irq_n, vector);
mbed_official 255:20b371a9491b 133 NVIC_EnableIRQ(irq_n);
mbed_official 255:20b371a9491b 134
mbed_official 255:20b371a9491b 135 obj->ch = ch_base + obj->pin;
mbed_official 255:20b371a9491b 136 channel_ids[obj->ch] = id;
mbed_official 255:20b371a9491b 137
mbed_official 255:20b371a9491b 138 return 0;
mbed_official 255:20b371a9491b 139 }
mbed_official 255:20b371a9491b 140
mbed_official 255:20b371a9491b 141 void gpio_irq_free(gpio_irq_t *obj) {
mbed_official 255:20b371a9491b 142 channel_ids[obj->ch] = 0;
mbed_official 255:20b371a9491b 143 }
mbed_official 255:20b371a9491b 144
mbed_official 255:20b371a9491b 145 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
mbed_official 255:20b371a9491b 146 PORT_Type *port = (PORT_Type *)(PORTA_BASE + 0x1000 * obj->port);
mbed_official 255:20b371a9491b 147
mbed_official 255:20b371a9491b 148 uint32_t irq_settings = IRQ_DISABLED;
mbed_official 255:20b371a9491b 149
mbed_official 255:20b371a9491b 150 switch (port->PCR[obj->pin] & PORT_PCR_IRQC_MASK) {
mbed_official 255:20b371a9491b 151 case IRQ_DISABLED:
mbed_official 255:20b371a9491b 152 if (enable)
mbed_official 255:20b371a9491b 153 irq_settings = (event == IRQ_RISE) ? (IRQ_RAISING_EDGE) : (IRQ_FALLING_EDGE);
mbed_official 255:20b371a9491b 154 break;
mbed_official 255:20b371a9491b 155
mbed_official 255:20b371a9491b 156 case IRQ_RAISING_EDGE:
mbed_official 255:20b371a9491b 157 if (enable) {
mbed_official 255:20b371a9491b 158 irq_settings = (event == IRQ_RISE) ? (IRQ_RAISING_EDGE) : (IRQ_EITHER_EDGE);
mbed_official 255:20b371a9491b 159 } else {
mbed_official 255:20b371a9491b 160 if (event == IRQ_FALL)
mbed_official 255:20b371a9491b 161 irq_settings = IRQ_RAISING_EDGE;
mbed_official 255:20b371a9491b 162 }
mbed_official 255:20b371a9491b 163 break;
mbed_official 255:20b371a9491b 164
mbed_official 255:20b371a9491b 165 case IRQ_FALLING_EDGE:
mbed_official 255:20b371a9491b 166 if (enable) {
mbed_official 255:20b371a9491b 167 irq_settings = (event == IRQ_FALL) ? (IRQ_FALLING_EDGE) : (IRQ_EITHER_EDGE);
mbed_official 255:20b371a9491b 168 } else {
mbed_official 255:20b371a9491b 169 if (event == IRQ_RISE)
mbed_official 255:20b371a9491b 170 irq_settings = IRQ_FALLING_EDGE;
mbed_official 255:20b371a9491b 171 }
mbed_official 255:20b371a9491b 172 break;
mbed_official 255:20b371a9491b 173
mbed_official 255:20b371a9491b 174 case IRQ_EITHER_EDGE:
mbed_official 255:20b371a9491b 175 if (enable) {
mbed_official 255:20b371a9491b 176 irq_settings = IRQ_EITHER_EDGE;
mbed_official 255:20b371a9491b 177 } else {
mbed_official 255:20b371a9491b 178 irq_settings = (event == IRQ_RISE) ? (IRQ_FALLING_EDGE) : (IRQ_RAISING_EDGE);
mbed_official 255:20b371a9491b 179 }
mbed_official 255:20b371a9491b 180 break;
mbed_official 255:20b371a9491b 181 }
mbed_official 255:20b371a9491b 182
mbed_official 255:20b371a9491b 183 // Interrupt configuration and clear interrupt
mbed_official 255:20b371a9491b 184 port->PCR[obj->pin] = (port->PCR[obj->pin] & ~PORT_PCR_IRQC_MASK) | irq_settings | PORT_PCR_ISF_MASK;
mbed_official 255:20b371a9491b 185 }
mbed_official 255:20b371a9491b 186
mbed_official 255:20b371a9491b 187 void gpio_irq_enable(gpio_irq_t *obj) {
mbed_official 255:20b371a9491b 188 switch (obj->port) {
mbed_official 255:20b371a9491b 189 case PortA:
mbed_official 255:20b371a9491b 190 NVIC_EnableIRQ(PORTA_IRQn);
mbed_official 255:20b371a9491b 191 break;
mbed_official 255:20b371a9491b 192 case PortB:
mbed_official 255:20b371a9491b 193 NVIC_EnableIRQ(PORTB_IRQn);
mbed_official 255:20b371a9491b 194 break;
mbed_official 255:20b371a9491b 195 case PortC:
mbed_official 255:20b371a9491b 196 NVIC_EnableIRQ(PORTC_IRQn);
mbed_official 255:20b371a9491b 197 break;
mbed_official 255:20b371a9491b 198 case PortD:
mbed_official 255:20b371a9491b 199 NVIC_EnableIRQ(PORTD_IRQn);
mbed_official 255:20b371a9491b 200 break;
mbed_official 255:20b371a9491b 201 case PortE:
mbed_official 255:20b371a9491b 202 NVIC_EnableIRQ(PORTE_IRQn);
mbed_official 255:20b371a9491b 203 break;
mbed_official 255:20b371a9491b 204 }
mbed_official 255:20b371a9491b 205 }
mbed_official 255:20b371a9491b 206
mbed_official 255:20b371a9491b 207 void gpio_irq_disable(gpio_irq_t *obj) {
mbed_official 255:20b371a9491b 208 switch (obj->port) {
mbed_official 255:20b371a9491b 209 case PortA:
mbed_official 255:20b371a9491b 210 NVIC_DisableIRQ(PORTA_IRQn);
mbed_official 255:20b371a9491b 211 break;
mbed_official 255:20b371a9491b 212 case PortB:
mbed_official 255:20b371a9491b 213 NVIC_DisableIRQ(PORTB_IRQn);
mbed_official 255:20b371a9491b 214 break;
mbed_official 255:20b371a9491b 215 case PortC:
mbed_official 255:20b371a9491b 216 NVIC_DisableIRQ(PORTC_IRQn);
mbed_official 255:20b371a9491b 217 break;
mbed_official 255:20b371a9491b 218 case PortD:
mbed_official 255:20b371a9491b 219 NVIC_DisableIRQ(PORTD_IRQn);
mbed_official 255:20b371a9491b 220 break;
mbed_official 255:20b371a9491b 221 case PortE:
mbed_official 255:20b371a9491b 222 NVIC_DisableIRQ(PORTE_IRQn);
mbed_official 255:20b371a9491b 223 break;
mbed_official 255:20b371a9491b 224 }
mbed_official 255:20b371a9491b 225 }