For with fix for disconnection notifications
Fork of nRF51822 by
Diff: nordic/app_common/app_button.c
- Revision:
- 60:e861f2041469
- Parent:
- 59:2819e564b613
- Child:
- 61:057be2a0cd38
--- a/nordic/app_common/app_button.c Tue Sep 02 16:42:56 2014 +0100 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,284 +0,0 @@ -/* Copyright (c) 2012 Nordic Semiconductor. All Rights Reserved. - * - * The information contained herein is property of Nordic Semiconductor ASA. - * Terms and conditions of usage are described in detail in NORDIC - * SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT. - * - * Licensees are granted free, non-transferable use of the information. NO - * WARRANTY of ANY KIND is provided. This heading must NOT be removed from - * the file. - * - */ - -#include "app_button.h" -#include <string.h> -#include "nordic_common.h" -#include "app_util.h" -#include "app_gpiote.h" -#include "app_timer.h" -#include "app_error.h" - - -static app_button_cfg_t * mp_buttons = NULL; /**< Button configuration. */ -static uint8_t m_button_count; /**< Number of configured buttons. */ -static uint32_t m_detection_delay; /**< Delay before a button is reported as pushed. */ -static app_button_evt_schedule_func_t m_evt_schedule_func; /**< Pointer to function for propagating button events to the scheduler. */ -static app_gpiote_user_id_t m_gpiote_user_id; /**< GPIOTE user id for buttons module. */ -static app_timer_id_t m_detection_delay_timer_id; /**< Polling timer id. */ -static pin_transition_t m_pin_transition; /**< pin transaction direction. */ - - -/**@brief Function for executing the application button handler for specified button. - * - * @param[in] p_btn Button that has been pushed. - */ -static void button_handler_execute(app_button_cfg_t * p_btn, uint32_t transition) -{ - if (m_evt_schedule_func != NULL) - { - uint32_t err_code = m_evt_schedule_func(p_btn->button_handler, p_btn->pin_no,transition); - APP_ERROR_CHECK(err_code); - } - else - { - if(transition == APP_BUTTON_PUSH) - { - p_btn->button_handler(p_btn->pin_no, APP_BUTTON_PUSH); - } - else if(transition == APP_BUTTON_RELEASE) - { - p_btn->button_handler(p_btn->pin_no, APP_BUTTON_RELEASE); - } - } -} - - -/**@brief Function for handling the timeout that delays reporting buttons as pushed. - * - * @details The detection_delay_timeout_handler(...) is a call-back issued from the app_timer - * module. It is called with the p_context parameter. The p_context parameter is - * provided to the app_timer module when a timer is started, using the call - * @ref app_timer_start. On @ref app_timer_start the p_context will be holding the - * currently pressed buttons. - * - * @param[in] p_context Pointer used for passing information app_start_timer() was called. - * In the app_button module the p_context holds information on pressed - * buttons. - */ -static void detection_delay_timeout_handler(void * p_context) -{ - uint32_t err_code; - uint32_t current_state_pins; - - // Get current state of pins. - err_code = app_gpiote_pins_state_get(m_gpiote_user_id, ¤t_state_pins); - - if (err_code != NRF_SUCCESS) - { - return; - } - - uint8_t i; - - // Pushed button(s) detected, execute button handler(s). - for (i = 0; i < m_button_count; i++) - { - app_button_cfg_t * p_btn = &mp_buttons[i]; - - if (((m_pin_transition.high_to_low & (1 << p_btn->pin_no)) != 0) && (p_btn->button_handler != NULL)) - { - //If it's active high then going from high to low was a release of the button. - if(p_btn->active_state == APP_BUTTON_ACTIVE_HIGH) - { - button_handler_execute(p_btn, APP_BUTTON_RELEASE); - } - //If it's active low then going from high to low was a push of the button. - else - { - button_handler_execute(p_btn, APP_BUTTON_PUSH); - } - } - else if (((m_pin_transition.low_to_high & (1 << p_btn->pin_no)) != 0) && (p_btn->button_handler != NULL)) - { - //If it's active high then going from low to high was a push of the button. - if(p_btn->active_state == APP_BUTTON_ACTIVE_HIGH) - { - button_handler_execute(p_btn,APP_BUTTON_PUSH); - } - //If it's active low then going from low to high was a release of the button. - else - { - button_handler_execute(p_btn,APP_BUTTON_RELEASE); - } - } - } -} - - -/**@brief Function for handling the GPIOTE event. - * - * @details Saves the current status of the button pins, and starts a timer. If the timer is already - * running, it will be restarted. - * - * @param[in] event_pins_low_to_high Mask telling which pin(s) had a low to high transition. - * @param[in] event_pins_high_to_low Mask telling which pin(s) had a high to low transition. - */ -static void gpiote_event_handler(uint32_t event_pins_low_to_high, uint32_t event_pins_high_to_low) -{ - uint32_t err_code; - - // Start detection timer. If timer is already running, the detection period is restarted. - // NOTE: Using the p_context parameter of app_timer_start() to transfer the pin states to the - // timeout handler (by casting event_pins_mask into the equally sized void * p_context - // parameter). - STATIC_ASSERT(sizeof(void *) == sizeof(uint32_t)); - - err_code = app_timer_stop(m_detection_delay_timer_id); - if (err_code != NRF_SUCCESS) - { - // The impact in app_button of the app_timer queue running full is losing a button press. - // The current implementation ensures that the system will continue working as normal. - return; - } - - m_pin_transition.low_to_high = event_pins_low_to_high; - m_pin_transition.high_to_low = event_pins_high_to_low; - - err_code = app_timer_start(m_detection_delay_timer_id, - m_detection_delay, - (void *)(event_pins_low_to_high | event_pins_high_to_low)); - if (err_code != NRF_SUCCESS) - { - // The impact in app_button of the app_timer queue running full is losing a button press. - // The current implementation ensures that the system will continue working as normal. - } -} - - -uint32_t app_button_init(app_button_cfg_t * p_buttons, - uint8_t button_count, - uint32_t detection_delay, - app_button_evt_schedule_func_t evt_schedule_func) -{ - uint32_t err_code; - - if (detection_delay < APP_TIMER_MIN_TIMEOUT_TICKS) - { - return NRF_ERROR_INVALID_PARAM; - } - - // Save configuration. - mp_buttons = p_buttons; - m_button_count = button_count; - m_detection_delay = detection_delay; - m_evt_schedule_func = evt_schedule_func; - - // Configure pins. - uint32_t pins_transition_mask = 0; - - while (button_count--) - { - app_button_cfg_t * p_btn = &p_buttons[button_count]; - - // Configure pin. - nrf_gpio_cfg_input(p_btn->pin_no, p_btn->pull_cfg); - - // Build GPIOTE user registration masks. - pins_transition_mask |= (1 << p_btn->pin_no); - } - - // Register button module as a GPIOTE user. - err_code = app_gpiote_user_register(&m_gpiote_user_id, - pins_transition_mask, - pins_transition_mask, - gpiote_event_handler); - if (err_code != NRF_SUCCESS) - { - return err_code; - } - - // Create polling timer. - return app_timer_create(&m_detection_delay_timer_id, - APP_TIMER_MODE_SINGLE_SHOT, - detection_delay_timeout_handler); -} - - -uint32_t app_button_enable(void) -{ - if (mp_buttons == NULL) - { - return NRF_ERROR_INVALID_STATE; - } - - return app_gpiote_user_enable(m_gpiote_user_id); -} - - -uint32_t app_button_disable(void) -{ - uint32_t err_code; - - if (mp_buttons == NULL) - { - return NRF_ERROR_INVALID_STATE; - } - - err_code = app_gpiote_user_disable(m_gpiote_user_id); - - if (err_code != NRF_SUCCESS) - { - return err_code; - } - - // Make sure polling timer is not running. - return app_timer_stop(m_detection_delay_timer_id); -} - - -uint32_t app_button_is_pushed(uint8_t pin_no, bool * p_is_pushed) -{ - uint32_t err_code; - uint32_t active_pins; - - app_button_cfg_t * p_btn = &mp_buttons[pin_no]; - - if (mp_buttons == NULL) - { - return NRF_ERROR_INVALID_STATE; - } - - err_code = app_gpiote_pins_state_get(m_gpiote_user_id, &active_pins); - - if (err_code != NRF_SUCCESS) - { - return err_code; - } - - if(p_btn->active_state == APP_BUTTON_ACTIVE_LOW) - { - // If the pin is active low, then the pin being high means it is not pushed. - if(((active_pins >> pin_no) & 0x01)) - { - *p_is_pushed = false; - } - else - { - *p_is_pushed = true; - } - } - else if(p_btn->active_state == APP_BUTTON_ACTIVE_HIGH) - { - // If the pin is active high, then the pin being high means it is pushed. - if(((active_pins >> pin_no) & 0x01)) - { - *p_is_pushed = true; - } - else - { - *p_is_pushed = false; - } - } - - return NRF_SUCCESS; -}