Jonathan Piat / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/hal/TARGET_Maxim/TARGET_MAX32600/gpio_irq_api.c@515:7467ef1f4ad8, 2015-04-17 (annotated)

Committer:
mbed_official
Date:
Fri Apr 17 08:45:07 2015 +0100
Revision:
515:7467ef1f4ad8
Parent:
514:7668256dbe61 
Synchronized with git revision faba4123ec6e5b7784e20f49bf5310dcab92c053



Full URL: https://github.com/mbedmicro/mbed/commit/faba4123ec6e5b7784e20f49bf5310dcab92c053/



[MAXWSNENV, MAX32600MBED] Adding export support.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 514:7668256dbe61 1 /*******************************************************************************
mbed_official 514:7668256dbe61 2 * Copyright (C) 2015 Maxim Integrated Products, Inc., All Rights Reserved.
mbed_official 514:7668256dbe61 3 *
mbed_official 514:7668256dbe61 4 * Permission is hereby granted, free of charge, to any person obtaining a
mbed_official 514:7668256dbe61 5 * copy of this software and associated documentation files (the "Software"),
mbed_official 514:7668256dbe61 6 * to deal in the Software without restriction, including without limitation
mbed_official 514:7668256dbe61 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
mbed_official 514:7668256dbe61 8 * and/or sell copies of the Software, and to permit persons to whom the
mbed_official 514:7668256dbe61 9 * Software is furnished to do so, subject to the following conditions:
mbed_official 514:7668256dbe61 10 *
mbed_official 514:7668256dbe61 11 * The above copyright notice and this permission notice shall be included
mbed_official 514:7668256dbe61 12 * in all copies or substantial portions of the Software.
mbed_official 514:7668256dbe61 13 *
mbed_official 514:7668256dbe61 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
mbed_official 514:7668256dbe61 15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
mbed_official 514:7668256dbe61 16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
mbed_official 514:7668256dbe61 17 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
mbed_official 514:7668256dbe61 18 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
mbed_official 514:7668256dbe61 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
mbed_official 514:7668256dbe61 20 * OTHER DEALINGS IN THE SOFTWARE.
mbed_official 514:7668256dbe61 21 *
mbed_official 514:7668256dbe61 22 * Except as contained in this notice, the name of Maxim Integrated
mbed_official 514:7668256dbe61 23 * Products, Inc. shall not be used except as stated in the Maxim Integrated
mbed_official 514:7668256dbe61 24 * Products, Inc. Branding Policy.
mbed_official 514:7668256dbe61 25 *
mbed_official 514:7668256dbe61 26 * The mere transfer of this software does not imply any licenses
mbed_official 514:7668256dbe61 27 * of trade secrets, proprietary technology, copyrights, patents,
mbed_official 514:7668256dbe61 28 * trademarks, maskwork rights, or any other form of intellectual
mbed_official 514:7668256dbe61 29 * property whatsoever. Maxim Integrated Products, Inc. retains all
mbed_official 514:7668256dbe61 30 * ownership rights.
mbed_official 514:7668256dbe61 31 *******************************************************************************
mbed_official 514:7668256dbe61 32 */
mbed_official 514:7668256dbe61 33
mbed_official 514:7668256dbe61 34 #include <stddef.h>
mbed_official 514:7668256dbe61 35 #include "cmsis.h"
mbed_official 514:7668256dbe61 36 #include "gpio_irq_api.h"
mbed_official 514:7668256dbe61 37 #include "mbed_error.h"
mbed_official 514:7668256dbe61 38
mbed_official 514:7668256dbe61 39 #define NUM_PORTS 8
mbed_official 514:7668256dbe61 40 #define NUM_PINS_PER_PORT 8
mbed_official 514:7668256dbe61 41
mbed_official 514:7668256dbe61 42 static uint32_t ids[NUM_PORTS][NUM_PINS_PER_PORT] = {{0}};
mbed_official 514:7668256dbe61 43 static gpio_irq_handler irq_handler;
mbed_official 514:7668256dbe61 44
mbed_official 514:7668256dbe61 45 static void handle_irq(unsigned int port)
mbed_official 514:7668256dbe61 46 {
mbed_official 514:7668256dbe61 47 uint32_t intfl, in_val;
mbed_official 514:7668256dbe61 48 uint32_t mask;
mbed_official 514:7668256dbe61 49 unsigned int pin;
mbed_official 514:7668256dbe61 50
mbed_official 514:7668256dbe61 51 /* Read pin state */
mbed_official 514:7668256dbe61 52 in_val = MXC_GPIO->in_val[port];
mbed_official 514:7668256dbe61 53
mbed_official 514:7668256dbe61 54 /* Read interrupts */
mbed_official 514:7668256dbe61 55 intfl = MXC_GPIO->intfl[port] & MXC_GPIO->inten[port];
mbed_official 514:7668256dbe61 56
mbed_official 514:7668256dbe61 57 mask = 1;
mbed_official 514:7668256dbe61 58
mbed_official 514:7668256dbe61 59 for (pin = 0; pin < NUM_PINS_PER_PORT; pin++) {
mbed_official 514:7668256dbe61 60 if (intfl & mask) {
mbed_official 514:7668256dbe61 61 if (ids[port][pin]) {
mbed_official 514:7668256dbe61 62 if (in_val & mask) {
mbed_official 514:7668256dbe61 63 irq_handler(ids[port][pin], IRQ_RISE);
mbed_official 514:7668256dbe61 64 } else {
mbed_official 514:7668256dbe61 65 irq_handler(ids[port][pin], IRQ_FALL);
mbed_official 514:7668256dbe61 66 }
mbed_official 514:7668256dbe61 67 }
mbed_official 514:7668256dbe61 68 MXC_GPIO->intfl[port] = mask; /* clear interrupt */
mbed_official 514:7668256dbe61 69 }
mbed_official 514:7668256dbe61 70 mask <<= 1;
mbed_official 514:7668256dbe61 71 }
mbed_official 514:7668256dbe61 72 }
mbed_official 514:7668256dbe61 73
mbed_official 514:7668256dbe61 74 void gpio_irq_0(void) { handle_irq(0); }
mbed_official 514:7668256dbe61 75 void gpio_irq_1(void) { handle_irq(1); }
mbed_official 514:7668256dbe61 76 void gpio_irq_2(void) { handle_irq(2); }
mbed_official 514:7668256dbe61 77 void gpio_irq_3(void) { handle_irq(3); }
mbed_official 514:7668256dbe61 78 void gpio_irq_4(void) { handle_irq(4); }
mbed_official 514:7668256dbe61 79 void gpio_irq_5(void) { handle_irq(5); }
mbed_official 514:7668256dbe61 80 void gpio_irq_6(void) { handle_irq(6); }
mbed_official 514:7668256dbe61 81 void gpio_irq_7(void) { handle_irq(7); }
mbed_official 514:7668256dbe61 82
mbed_official 514:7668256dbe61 83 int gpio_irq_init(gpio_irq_t *obj, PinName name, gpio_irq_handler handler, uint32_t id)
mbed_official 514:7668256dbe61 84 {
mbed_official 514:7668256dbe61 85 if (name == NC)
mbed_official 514:7668256dbe61 86 return -1;
mbed_official 514:7668256dbe61 87
mbed_official 514:7668256dbe61 88 uint8_t port = PINNAME_TO_PORT(name);
mbed_official 514:7668256dbe61 89 uint8_t pin = PINNAME_TO_PIN(name);
mbed_official 514:7668256dbe61 90
mbed_official 514:7668256dbe61 91 if ((port > NUM_PORTS) || (pin > NUM_PINS_PER_PORT)) {
mbed_official 514:7668256dbe61 92 return 1;
mbed_official 514:7668256dbe61 93 }
mbed_official 514:7668256dbe61 94
mbed_official 514:7668256dbe61 95 obj->port = port;
mbed_official 514:7668256dbe61 96 obj->pin = pin;
mbed_official 514:7668256dbe61 97
mbed_official 514:7668256dbe61 98 irq_handler = handler;
mbed_official 514:7668256dbe61 99
mbed_official 514:7668256dbe61 100 ids[port][pin] = id;
mbed_official 514:7668256dbe61 101
mbed_official 514:7668256dbe61 102 /* register handlers */
mbed_official 514:7668256dbe61 103 NVIC_SetVector(GPIO_P0_IRQn, (uint32_t)gpio_irq_0);
mbed_official 514:7668256dbe61 104 NVIC_SetVector(GPIO_P1_IRQn, (uint32_t)gpio_irq_1);
mbed_official 514:7668256dbe61 105 NVIC_SetVector(GPIO_P2_IRQn, (uint32_t)gpio_irq_2);
mbed_official 514:7668256dbe61 106 NVIC_SetVector(GPIO_P3_IRQn, (uint32_t)gpio_irq_3);
mbed_official 514:7668256dbe61 107 NVIC_SetVector(GPIO_P4_IRQn, (uint32_t)gpio_irq_4);
mbed_official 514:7668256dbe61 108 NVIC_SetVector(GPIO_P5_IRQn, (uint32_t)gpio_irq_5);
mbed_official 514:7668256dbe61 109 NVIC_SetVector(GPIO_P6_IRQn, (uint32_t)gpio_irq_6);
mbed_official 514:7668256dbe61 110 NVIC_SetVector(GPIO_P7_IRQn, (uint32_t)gpio_irq_7);
mbed_official 514:7668256dbe61 111
mbed_official 514:7668256dbe61 112 /* disable the interrupt locally */
mbed_official 514:7668256dbe61 113 MXC_GPIO->int_mode[port] &= ~(0xF << (pin*4));
mbed_official 514:7668256dbe61 114
mbed_official 514:7668256dbe61 115 /* clear a pending request */
mbed_official 514:7668256dbe61 116 MXC_GPIO->intfl[port] = 1 << pin;
mbed_official 514:7668256dbe61 117
mbed_official 514:7668256dbe61 118 /* enable the requested interrupt */
mbed_official 514:7668256dbe61 119 MXC_GPIO->inten[port] |= (1 << pin);
mbed_official 515:7467ef1f4ad8 120 NVIC_EnableIRQ((IRQn_Type)((uint32_t)GPIO_P0_IRQn + port));
mbed_official 514:7668256dbe61 121
mbed_official 514:7668256dbe61 122 return 0;
mbed_official 514:7668256dbe61 123 }
mbed_official 514:7668256dbe61 124
mbed_official 514:7668256dbe61 125 void gpio_irq_free(gpio_irq_t *obj)
mbed_official 514:7668256dbe61 126 {
mbed_official 514:7668256dbe61 127 /* disable interrupt */
mbed_official 514:7668256dbe61 128 MXC_GPIO->inten[obj->port] &= ~(1 << obj->pin);
mbed_official 514:7668256dbe61 129 MXC_GPIO->int_mode[obj->port] &= ~(0xF << (obj->pin*4));
mbed_official 514:7668256dbe61 130
mbed_official 514:7668256dbe61 131 ids[obj->port][obj->pin] = 0;
mbed_official 514:7668256dbe61 132 }
mbed_official 514:7668256dbe61 133
mbed_official 514:7668256dbe61 134 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable)
mbed_official 514:7668256dbe61 135 {
mbed_official 514:7668256dbe61 136 uint32_t int_mode = MXC_GPIO->int_mode[obj->port];
mbed_official 514:7668256dbe61 137 uint32_t curr_mode = (int_mode >> (obj->pin*4)) & 0x3; /* only supporting edge interrupts */
mbed_official 514:7668256dbe61 138
mbed_official 514:7668256dbe61 139 uint32_t new_mode = curr_mode;
mbed_official 514:7668256dbe61 140 if (event == IRQ_FALL) {
mbed_official 514:7668256dbe61 141 if (enable) {
mbed_official 514:7668256dbe61 142 new_mode |= 0x1;
mbed_official 514:7668256dbe61 143 } else {
mbed_official 514:7668256dbe61 144 new_mode &= ~0x1;
mbed_official 514:7668256dbe61 145 }
mbed_official 514:7668256dbe61 146 } else if (event == IRQ_RISE) {
mbed_official 514:7668256dbe61 147 if (enable) {
mbed_official 514:7668256dbe61 148 new_mode |= 0x2;
mbed_official 514:7668256dbe61 149 } else {
mbed_official 514:7668256dbe61 150 new_mode &= ~0x2;
mbed_official 514:7668256dbe61 151 }
mbed_official 514:7668256dbe61 152 }
mbed_official 514:7668256dbe61 153
mbed_official 514:7668256dbe61 154 int_mode &= ~(0xF << (obj->pin*4));
mbed_official 514:7668256dbe61 155 int_mode |= (new_mode << (obj->pin*4));
mbed_official 514:7668256dbe61 156 MXC_GPIO->int_mode[obj->port] = int_mode;
mbed_official 514:7668256dbe61 157 }
mbed_official 514:7668256dbe61 158
mbed_official 514:7668256dbe61 159 void gpio_irq_enable(gpio_irq_t *obj)
mbed_official 514:7668256dbe61 160 {
mbed_official 514:7668256dbe61 161 MXC_GPIO->inten[obj->port] |= (1 << obj->pin);
mbed_official 514:7668256dbe61 162 }
mbed_official 514:7668256dbe61 163
mbed_official 514:7668256dbe61 164 void gpio_irq_disable(gpio_irq_t *obj)
mbed_official 514:7668256dbe61 165 {
mbed_official 514:7668256dbe61 166 MXC_GPIO->inten[obj->port] &= ~(1 << obj->pin);
mbed_official 514:7668256dbe61 167 }