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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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:

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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_NORDIC/TARGET_MCU_NRF51822/gpio_irq_api.c@395:bfce16e86ea4, 2014-11-10 (annotated)

Committer:
mbed_official
Date:
Mon Nov 10 07:45:06 2014 +0000
Revision:
395:bfce16e86ea4
Parent:
300:55638feb26a4 
Synchronized with git revision 8adfd82aa1bf8859ec08537ee7bcd4aaaec1769b



Full URL: https://github.com/mbedmicro/mbed/commit/8adfd82aa1bf8859ec08537ee7bcd4aaaec1769b/



Targets: LPC176X - Add repeater pinmode

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 85:e1a8e879a6a9 1 /* mbed Microcontroller Library
mbed_official 104:a6a92e2e5a92 2 * Copyright (c) 2013 Nordic Semiconductor
mbed_official 85:e1a8e879a6a9 3 *
mbed_official 85:e1a8e879a6a9 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 85:e1a8e879a6a9 5 * you may not use this file except in compliance with the License.
mbed_official 85:e1a8e879a6a9 6 * You may obtain a copy of the License at
mbed_official 85:e1a8e879a6a9 7 *
mbed_official 85:e1a8e879a6a9 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 85:e1a8e879a6a9 9 *
mbed_official 85:e1a8e879a6a9 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 85:e1a8e879a6a9 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 85:e1a8e879a6a9 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 85:e1a8e879a6a9 13 * See the License for the specific language governing permissions and
mbed_official 85:e1a8e879a6a9 14 * limitations under the License.
mbed_official 85:e1a8e879a6a9 15 */
mbed_official 85:e1a8e879a6a9 16 #include <stddef.h>
mbed_official 85:e1a8e879a6a9 17 #include "cmsis.h"
mbed_official 85:e1a8e879a6a9 18
mbed_official 85:e1a8e879a6a9 19 #include "gpio_irq_api.h"
mbed_official 285:31249416b6f9 20 #include "mbed_error.h"
mbed_official 85:e1a8e879a6a9 21
mbed_official 85:e1a8e879a6a9 22 #define CHANNEL_NUM 31
mbed_official 85:e1a8e879a6a9 23
mbed_official 85:e1a8e879a6a9 24 static uint32_t channel_ids[CHANNEL_NUM] = {0}; //each pin will be given an id, if id is 0 the pin can be ignored.
mbed_official 85:e1a8e879a6a9 25 static uint8_t channel_enabled[CHANNEL_NUM] = {0};
mbed_official 300:55638feb26a4 26 static uint32_t portRISE = 0;
mbed_official 300:55638feb26a4 27 static uint32_t portFALL = 0;
mbed_official 85:e1a8e879a6a9 28 static gpio_irq_handler irq_handler;
mbed_official 85:e1a8e879a6a9 29
mbed_official 85:e1a8e879a6a9 30 #ifdef __cplusplus
mbed_official 85:e1a8e879a6a9 31 extern "C" {
mbed_official 300:55638feb26a4 32 #endif
mbed_official 300:55638feb26a4 33 void GPIOTE_IRQHandler(void)
mbed_official 300:55638feb26a4 34 {
mbed_official 300:55638feb26a4 35 volatile uint32_t newVal = NRF_GPIO->IN;
mbed_official 300:55638feb26a4 36
mbed_official 300:55638feb26a4 37 if ((NRF_GPIOTE->EVENTS_PORT != 0) && ((NRF_GPIOTE->INTENSET & GPIOTE_INTENSET_PORT_Msk) != 0)) {
mbed_official 300:55638feb26a4 38 NRF_GPIOTE->EVENTS_PORT = 0;
mbed_official 300:55638feb26a4 39
mbed_official 300:55638feb26a4 40 for (uint8_t i = 0; i<31; i++) {
mbed_official 300:55638feb26a4 41 if (channel_ids[i]>0) {
mbed_official 300:55638feb26a4 42 if (channel_enabled[i]) {
mbed_official 85:e1a8e879a6a9 43 if( ((newVal>>i)&1) && ( ( (NRF_GPIO->PIN_CNF[i] >>GPIO_PIN_CNF_SENSE_Pos) & GPIO_PIN_CNF_SENSE_Low) != GPIO_PIN_CNF_SENSE_Low) && ( (portRISE>>i)&1) ){
mbed_official 300:55638feb26a4 44 irq_handler(channel_ids[i], IRQ_RISE);
mbed_official 300:55638feb26a4 45 } else if ((((newVal >> i) & 1) == 0) &&
mbed_official 300:55638feb26a4 46 (((NRF_GPIO->PIN_CNF[i] >> GPIO_PIN_CNF_SENSE_Pos) & GPIO_PIN_CNF_SENSE_Low) == GPIO_PIN_CNF_SENSE_Low) &&
mbed_official 300:55638feb26a4 47 ((portFALL >> i) & 1)) {
mbed_official 300:55638feb26a4 48 irq_handler(channel_ids[i], IRQ_FALL);
mbed_official 300:55638feb26a4 49 }
mbed_official 85:e1a8e879a6a9 50 }
mbed_official 300:55638feb26a4 51
mbed_official 300:55638feb26a4 52 if (NRF_GPIO->PIN_CNF[i] & GPIO_PIN_CNF_SENSE_Msk) {
mbed_official 85:e1a8e879a6a9 53 NRF_GPIO->PIN_CNF[i] &= ~(GPIO_PIN_CNF_SENSE_Msk);
mbed_official 300:55638feb26a4 54
mbed_official 300:55638feb26a4 55 if (newVal >> i & 1) {
mbed_official 300:55638feb26a4 56 NRF_GPIO->PIN_CNF[i] |= (GPIO_PIN_CNF_SENSE_Low << GPIO_PIN_CNF_SENSE_Pos);
mbed_official 300:55638feb26a4 57 } else {
mbed_official 300:55638feb26a4 58 NRF_GPIO->PIN_CNF[i] |= (GPIO_PIN_CNF_SENSE_High << GPIO_PIN_CNF_SENSE_Pos);
mbed_official 85:e1a8e879a6a9 59 }
mbed_official 85:e1a8e879a6a9 60 }
mbed_official 85:e1a8e879a6a9 61 }
mbed_official 85:e1a8e879a6a9 62 }
mbed_official 85:e1a8e879a6a9 63 }
mbed_official 85:e1a8e879a6a9 64 }
mbed_official 85:e1a8e879a6a9 65
mbed_official 300:55638feb26a4 66 #ifdef __cplusplus
mbed_official 300:55638feb26a4 67 }
mbed_official 300:55638feb26a4 68 #endif
mbed_official 300:55638feb26a4 69
mbed_official 300:55638feb26a4 70 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id)
mbed_official 300:55638feb26a4 71 {
mbed_official 300:55638feb26a4 72 if (pin == NC) {
mbed_official 300:55638feb26a4 73 return -1;
mbed_official 300:55638feb26a4 74 }
mbed_official 300:55638feb26a4 75
mbed_official 300:55638feb26a4 76 irq_handler = handler;
mbed_official 300:55638feb26a4 77 obj->ch = pin;
mbed_official 300:55638feb26a4 78 NRF_GPIOTE->EVENTS_PORT = 0;
mbed_official 300:55638feb26a4 79 channel_ids[pin] = id;
mbed_official 300:55638feb26a4 80 channel_enabled[pin] = 1;
mbed_official 300:55638feb26a4 81 NRF_GPIOTE->INTENSET = GPIOTE_INTENSET_PORT_Set << GPIOTE_INTENSET_PORT_Pos;
mbed_official 300:55638feb26a4 82
mbed_official 300:55638feb26a4 83 NVIC_SetPriority(GPIOTE_IRQn, 3);
mbed_official 300:55638feb26a4 84 NVIC_EnableIRQ (GPIOTE_IRQn);
mbed_official 300:55638feb26a4 85 return 0;
mbed_official 300:55638feb26a4 86 }
mbed_official 300:55638feb26a4 87
mbed_official 300:55638feb26a4 88 void gpio_irq_free(gpio_irq_t *obj)
mbed_official 300:55638feb26a4 89 {
mbed_official 300:55638feb26a4 90 channel_ids[obj->ch] = 0;
mbed_official 300:55638feb26a4 91 }
mbed_official 300:55638feb26a4 92
mbed_official 300:55638feb26a4 93 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable)
mbed_official 300:55638feb26a4 94 {
mbed_official 300:55638feb26a4 95 NRF_GPIO->PIN_CNF[obj->ch] &= ~(GPIO_PIN_CNF_SENSE_Msk);
mbed_official 300:55638feb26a4 96 if (enable) {
mbed_official 300:55638feb26a4 97 if (event == IRQ_RISE) {
mbed_official 300:55638feb26a4 98 portRISE |= (1 << obj->ch);
mbed_official 300:55638feb26a4 99 } else if (event == IRQ_FALL) {
mbed_official 300:55638feb26a4 100 portFALL |= (1 << obj->ch);
mbed_official 300:55638feb26a4 101 }
mbed_official 300:55638feb26a4 102 } else {
mbed_official 300:55638feb26a4 103 if (event == IRQ_RISE) {
mbed_official 300:55638feb26a4 104 portRISE &= ~(1 << obj->ch);
mbed_official 300:55638feb26a4 105 } else if (event == IRQ_FALL) {
mbed_official 300:55638feb26a4 106 portFALL &= ~(1 << obj->ch);
mbed_official 300:55638feb26a4 107 }
mbed_official 300:55638feb26a4 108 }
mbed_official 300:55638feb26a4 109
mbed_official 300:55638feb26a4 110 if (((portRISE >> obj->ch) & 1) || ((portFALL >> obj->ch) & 1)) {
mbed_official 300:55638feb26a4 111 if ((NRF_GPIO->IN >> obj->ch) & 1) {
mbed_official 300:55638feb26a4 112 NRF_GPIO->PIN_CNF[obj->ch] |= (GPIO_PIN_CNF_SENSE_Low << GPIO_PIN_CNF_SENSE_Pos); // | (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos);
mbed_official 300:55638feb26a4 113 } else {
mbed_official 300:55638feb26a4 114 NRF_GPIO->PIN_CNF[obj->ch] |= (GPIO_PIN_CNF_SENSE_High << GPIO_PIN_CNF_SENSE_Pos); //| (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos);
mbed_official 300:55638feb26a4 115 }
mbed_official 300:55638feb26a4 116 }
mbed_official 300:55638feb26a4 117 }
mbed_official 300:55638feb26a4 118
mbed_official 300:55638feb26a4 119 void gpio_irq_enable(gpio_irq_t *obj)
mbed_official 300:55638feb26a4 120 {
mbed_official 85:e1a8e879a6a9 121 channel_enabled[obj->ch] = 1;
mbed_official 85:e1a8e879a6a9 122 }
mbed_official 85:e1a8e879a6a9 123
mbed_official 300:55638feb26a4 124 void gpio_irq_disable(gpio_irq_t *obj)
mbed_official 300:55638feb26a4 125 {
mbed_official 85:e1a8e879a6a9 126 channel_enabled[obj->ch] = 0;
mbed_official 85:e1a8e879a6a9 127 }