mbed library sources
Dependents: frdm_kl05z_gpio_test
Fork of mbed-src by
targets/hal/TARGET_NORDIC/TARGET_MCU_NRF51822/gpio_irq_api.c
- Committer:
- mbed_official
- Date:
- 2014-08-01
- Revision:
- 270:e2babe29baf8
- Parent:
- targets/hal/TARGET_NORDIC/TARGET_NRF51822/gpio_irq_api.c@ 251:de9a1e4ffd79
- Child:
- 285:31249416b6f9
File content as of revision 270:e2babe29baf8:
/* mbed Microcontroller Library * Copyright (c) 2013 Nordic Semiconductor * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include <stddef.h> #include "cmsis.h" #include "gpio_irq_api.h" #include "error.h" #define CHANNEL_NUM 31 static uint32_t channel_ids[CHANNEL_NUM] = {0}; //each pin will be given an id, if id is 0 the pin can be ignored. static uint8_t channel_enabled[CHANNEL_NUM] = {0}; static uint32_t portRISE= 0; static uint32_t portFALL= 0; static gpio_irq_handler irq_handler; #ifdef __cplusplus extern "C" { #endif void GPIOTE_IRQHandler(void){ volatile uint32_t newVal = NRF_GPIO->IN; if ( (NRF_GPIOTE->EVENTS_PORT != 0) && ( (NRF_GPIOTE->INTENSET & GPIOTE_INTENSET_PORT_Msk) != 0) ){ NRF_GPIOTE->EVENTS_PORT = 0; for(uint8_t i=0;i<31;i++){ if(channel_ids[i]>0){ if(channel_enabled[i]){ 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) ){ irq_handler(channel_ids[i], IRQ_RISE); } 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) ){ irq_handler(channel_ids[i], IRQ_FALL); } } if(NRF_GPIO->PIN_CNF[i] &GPIO_PIN_CNF_SENSE_Msk){ NRF_GPIO->PIN_CNF[i] &= ~(GPIO_PIN_CNF_SENSE_Msk); if(newVal>>i &1){ NRF_GPIO->PIN_CNF[i] |= (GPIO_PIN_CNF_SENSE_Low << GPIO_PIN_CNF_SENSE_Pos) ; } else{ NRF_GPIO->PIN_CNF[i] |= (GPIO_PIN_CNF_SENSE_High << GPIO_PIN_CNF_SENSE_Pos) ; } } } } } } #ifdef __cplusplus } #endif int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) { if (pin == NC) { return -1; } irq_handler = handler; obj->ch = pin; NRF_GPIOTE->EVENTS_PORT = 0; channel_ids[pin] = id; channel_enabled[pin] = 1; NRF_GPIOTE->INTENSET = GPIOTE_INTENSET_PORT_Set<<GPIOTE_INTENSET_PORT_Pos; NVIC_SetPriority(GPIOTE_IRQn, 3); NVIC_EnableIRQ (GPIOTE_IRQn); return 0; } void gpio_irq_free(gpio_irq_t *obj) { channel_ids[obj->ch] = 0; } void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable) { NRF_GPIO->PIN_CNF[obj->ch] &= ~(GPIO_PIN_CNF_SENSE_Msk); if(enable){ if(event == IRQ_RISE){ portRISE |= (1<<obj->ch); } else if(event == IRQ_FALL){ portFALL |= (1<<obj->ch); } } else{ if(event == IRQ_RISE){ portRISE &= ~(1<<obj->ch); } else if(event == IRQ_FALL){ portFALL &= ~(1<<obj->ch); } } if( ( (portRISE>>obj->ch) & 1) || ( (portFALL>>obj->ch) & 1) ){ if((NRF_GPIO->IN>>obj->ch)&1){ 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); } else{ 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); } } } void gpio_irq_enable(gpio_irq_t *obj) { channel_enabled[obj->ch] = 1; } void gpio_irq_disable(gpio_irq_t *obj) { channel_enabled[obj->ch] = 0; }