shao ziyang / mbed-src-kl05

mbed library sources

Dependents:   frdm_kl05z_gpio_test

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targets/hal/TARGET_NORDIC/TARGET_MCU_NRF51822/gpio_irq_api.c@323:9e901b0a5aa1, 2014-09-13 (annotated)

Committer:
shaoziyang
Date:
Sat Sep 13 14:25:46 2014 +0000
Revision:
323:9e901b0a5aa1
Parent:
300:55638feb26a4 
test with CLOCK_SETUP = 0

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 }