shao ziyang / mbed-src-kl05

mbed library sources

Dependents:   frdm_kl05z_gpio_test

Fork of mbed-src by mbed official

targets/hal/TARGET_NORDIC/TARGET_NRF51822/gpio_irq_api.c@250:a49055e7a707, 2014-07-08 (annotated)

Committer:
mbed_official
Date:
Tue Jul 08 11:15:08 2014 +0100
Revision:
250:a49055e7a707
Parent:
104:a6a92e2e5a92
Child:
251:de9a1e4ffd79
Synchronized with git revision 3197042b65f8d28e856e1a7812d45e2fbe80e3f1



Full URL: https://github.com/mbedmicro/mbed/commit/3197042b65f8d28e856e1a7812d45e2fbe80e3f1/



error.h -> mbed_error.h

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 250:a49055e7a707 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 85:e1a8e879a6a9 26 static uint32_t portRISE= 0;
mbed_official 85:e1a8e879a6a9 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 85:e1a8e879a6a9 32 #endif
mbed_official 85:e1a8e879a6a9 33 void GPIOTE_IRQHandler(void){
mbed_official 85:e1a8e879a6a9 34 volatile uint32_t newVal = NRF_GPIO->IN;
mbed_official 85:e1a8e879a6a9 35
mbed_official 85:e1a8e879a6a9 36 if ( (NRF_GPIOTE->EVENTS_PORT != 0) && ( (NRF_GPIOTE->INTENSET & GPIOTE_INTENSET_PORT_Msk) != 0) ){
mbed_official 85:e1a8e879a6a9 37 NRF_GPIOTE->EVENTS_PORT = 0;
mbed_official 85:e1a8e879a6a9 38
mbed_official 85:e1a8e879a6a9 39 for(uint8_t i=0;i<31;i++){
mbed_official 85:e1a8e879a6a9 40 if(channel_ids[i]>0){
mbed_official 85:e1a8e879a6a9 41 if(channel_enabled[i]){
mbed_official 85:e1a8e879a6a9 42 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 85:e1a8e879a6a9 43 irq_handler(channel_ids[i], IRQ_RISE);
mbed_official 85:e1a8e879a6a9 44 }
mbed_official 85:e1a8e879a6a9 45 else if( ( ((newVal>>i)&1) == 0) && ( ( (NRF_GPIO->PIN_CNF[i] >>GPIO_PIN_CNF_SENSE_Pos)&GPIO_PIN_CNF_SENSE_Low) == GPIO_PIN_CNF_SENSE_Low) && ( (portFALL>>i)&1) ){
mbed_official 85:e1a8e879a6a9 46 irq_handler(channel_ids[i], IRQ_FALL);
mbed_official 85:e1a8e879a6a9 47 }
mbed_official 85:e1a8e879a6a9 48 }
mbed_official 85:e1a8e879a6a9 49
mbed_official 85:e1a8e879a6a9 50 if(NRF_GPIO->PIN_CNF[i] &GPIO_PIN_CNF_SENSE_Msk){
mbed_official 85:e1a8e879a6a9 51 NRF_GPIO->PIN_CNF[i] &= ~(GPIO_PIN_CNF_SENSE_Msk);
mbed_official 85:e1a8e879a6a9 52
mbed_official 85:e1a8e879a6a9 53 if(newVal>>i &1){
mbed_official 85:e1a8e879a6a9 54 NRF_GPIO->PIN_CNF[i] |= (GPIO_PIN_CNF_SENSE_Low << GPIO_PIN_CNF_SENSE_Pos) ;
mbed_official 85:e1a8e879a6a9 55 }
mbed_official 85:e1a8e879a6a9 56 else{
mbed_official 85:e1a8e879a6a9 57 NRF_GPIO->PIN_CNF[i] |= (GPIO_PIN_CNF_SENSE_High << GPIO_PIN_CNF_SENSE_Pos) ;
mbed_official 85:e1a8e879a6a9 58 }
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 #ifdef __cplusplus
mbed_official 85:e1a8e879a6a9 65 }
mbed_official 85:e1a8e879a6a9 66 #endif
mbed_official 85:e1a8e879a6a9 67
mbed_official 85:e1a8e879a6a9 68 int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) {
mbed_official 85:e1a8e879a6a9 69 if (pin == NC) {
mbed_official 85:e1a8e879a6a9 70 return -1;
mbed_official 85:e1a8e879a6a9 71 }
mbed_official 85:e1a8e879a6a9 72
mbed_official 85:e1a8e879a6a9 73 irq_handler = handler;
mbed_official 85:e1a8e879a6a9 74 obj->ch = pin;
mbed_official 85:e1a8e879a6a9 75 NRF_GPIOTE->EVENTS_PORT = 0;
mbed_official 85:e1a8e879a6a9 76 channel_ids[pin] = id;
mbed_official 85:e1a8e879a6a9 77 channel_enabled[pin] = 1;
mbed_official 85:e1a8e879a6a9 78 NRF_GPIOTE->INTENSET = GPIOTE_INTENSET_PORT_Set<<GPIOTE_INTENSET_PORT_Pos;
mbed_official 85:e1a8e879a6a9 79
mbed_official 85:e1a8e879a6a9 80 NVIC_SetPriority(GPIOTE_IRQn, 3);
mbed_official 85:e1a8e879a6a9 81 NVIC_EnableIRQ (GPIOTE_IRQn);
mbed_official 85:e1a8e879a6a9 82 return 0;
mbed_official 85:e1a8e879a6a9 83 }
mbed_official 85:e1a8e879a6a9 84
mbed_official 85:e1a8e879a6a9 85 void gpio_irq_free(gpio_irq_t *obj) {
mbed_official 85:e1a8e879a6a9 86 channel_ids[obj->ch] = 0;
mbed_official 85:e1a8e879a6a9 87 }
mbed_official 85:e1a8e879a6a9 88
mbed_official 85:e1a8e879a6a9 89 void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) {
mbed_official 85:e1a8e879a6a9 90 NRF_GPIO->PIN_CNF[obj->ch] &= ~(GPIO_PIN_CNF_SENSE_Msk);
mbed_official 85:e1a8e879a6a9 91 if(enable){
mbed_official 85:e1a8e879a6a9 92 if(event == IRQ_RISE){
mbed_official 85:e1a8e879a6a9 93 portRISE |= (1<<obj->ch);
mbed_official 85:e1a8e879a6a9 94 }
mbed_official 85:e1a8e879a6a9 95 else if(event == IRQ_FALL){
mbed_official 85:e1a8e879a6a9 96 portFALL |= (1<<obj->ch);
mbed_official 85:e1a8e879a6a9 97 }
mbed_official 85:e1a8e879a6a9 98 }
mbed_official 85:e1a8e879a6a9 99 else{
mbed_official 85:e1a8e879a6a9 100 if(event == IRQ_RISE){
mbed_official 85:e1a8e879a6a9 101 portRISE &= ~(1<<obj->ch);
mbed_official 85:e1a8e879a6a9 102 }
mbed_official 85:e1a8e879a6a9 103 else if(event == IRQ_FALL){
mbed_official 85:e1a8e879a6a9 104 portFALL &= ~(1<<obj->ch);
mbed_official 85:e1a8e879a6a9 105 }
mbed_official 85:e1a8e879a6a9 106
mbed_official 85:e1a8e879a6a9 107 }
mbed_official 85:e1a8e879a6a9 108
mbed_official 85:e1a8e879a6a9 109 if( ( (portRISE>>obj->ch) & 1) || ( (portFALL>>obj->ch) & 1) ){
mbed_official 85:e1a8e879a6a9 110 if((NRF_GPIO->IN>>obj->ch)&1){
mbed_official 85:e1a8e879a6a9 111 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 85:e1a8e879a6a9 112 }
mbed_official 85:e1a8e879a6a9 113 else{
mbed_official 85:e1a8e879a6a9 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 85:e1a8e879a6a9 115 }
mbed_official 85:e1a8e879a6a9 116 }
mbed_official 85:e1a8e879a6a9 117 }
mbed_official 85:e1a8e879a6a9 118
mbed_official 85:e1a8e879a6a9 119 void gpio_irq_enable(gpio_irq_t *obj) {
mbed_official 85:e1a8e879a6a9 120 channel_enabled[obj->ch] = 1;
mbed_official 85:e1a8e879a6a9 121 }
mbed_official 85:e1a8e879a6a9 122
mbed_official 85:e1a8e879a6a9 123 void gpio_irq_disable(gpio_irq_t *obj) {
mbed_official 85:e1a8e879a6a9 124 channel_enabled[obj->ch] = 0;
mbed_official 85:e1a8e879a6a9 125 }