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Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/button/app_button.c')
| -rw-r--r-- | thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/button/app_button.c | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/button/app_button.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/button/app_button.c new file mode 100644 index 0000000..b422095 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/button/app_button.c @@ -0,0 +1,223 @@ +/** + * Copyright (c) 2012 - 2018, Nordic Semiconductor ASA + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form, except as embedded into a Nordic + * Semiconductor ASA integrated circuit in a product or a software update for + * such product, must reproduce the above copyright notice, this list of + * conditions and the following disclaimer in the documentation and/or other + * materials provided with the distribution. + * + * 3. Neither the name of Nordic Semiconductor ASA nor the names of its + * contributors may be used to endorse or promote products derived from this + * software without specific prior written permission. + * + * 4. This software, with or without modification, must only be used with a + * Nordic Semiconductor ASA integrated circuit. + * + * 5. Any software provided in binary form under this license must not be reverse + * engineered, decompiled, modified and/or disassembled. + * + * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS + * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ +#include "sdk_common.h" +#if NRF_MODULE_ENABLED(BUTTON) +#include "app_button.h" +#include "app_timer.h" +#include "app_error.h" +#include "nrf_drv_gpiote.h" +#include "nrf_assert.h" + + +static app_button_cfg_t const * 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. */ +APP_TIMER_DEF(m_detection_delay_timer_id); /**< Polling timer id. */ + + +static uint64_t m_pin_state; +static uint64_t m_pin_transition; + +/**@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) +{ + uint8_t i; + + // Pushed button(s) detected, execute button handler(s). + for (i = 0; i < m_button_count; i++) + { + app_button_cfg_t const * p_btn = &mp_buttons[i]; + uint64_t btn_mask = 1ULL << p_btn->pin_no; + if (btn_mask & m_pin_transition) + { + m_pin_transition &= ~btn_mask; + bool pin_is_set = nrf_drv_gpiote_in_is_set(p_btn->pin_no); + if ((m_pin_state & (1ULL << p_btn->pin_no)) == (((uint64_t)pin_is_set) << p_btn->pin_no)) + { + uint32_t transition = !(pin_is_set ^ (p_btn->active_state == APP_BUTTON_ACTIVE_HIGH)); + + if (p_btn->button_handler) + { + p_btn->button_handler(p_btn->pin_no, transition); + } + } + } + } +} + +static void gpiote_event_handler(nrf_drv_gpiote_pin_t pin, nrf_gpiote_polarity_t action) +{ + uint32_t err_code; + uint64_t pin_mask = 1ULL << pin; + + // 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). + 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; + } + + if (!(m_pin_transition & pin_mask)) + { + if (nrf_drv_gpiote_in_is_set(pin)) + { + m_pin_state |= pin_mask; + } + else + { + m_pin_state &= ~(pin_mask); + } + m_pin_transition |= (pin_mask); + + err_code = app_timer_start(m_detection_delay_timer_id, m_detection_delay, NULL); + 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. + } + } + else + { + m_pin_transition &= ~pin_mask; + } +} + +uint32_t app_button_init(app_button_cfg_t const * p_buttons, + uint8_t button_count, + uint32_t detection_delay) +{ + uint32_t err_code; + + if (detection_delay < APP_TIMER_MIN_TIMEOUT_TICKS) + { + return NRF_ERROR_INVALID_PARAM; + } + + if (!nrf_drv_gpiote_is_init()) + { + err_code = nrf_drv_gpiote_init(); + VERIFY_SUCCESS(err_code); + } + + // Save configuration. + mp_buttons = p_buttons; + m_button_count = button_count; + m_detection_delay = detection_delay; + + m_pin_state = 0; + m_pin_transition = 0; + + while (button_count--) + { + app_button_cfg_t const * p_btn = &p_buttons[button_count]; + +#if defined(BUTTON_HIGH_ACCURACY_ENABLED) && (BUTTON_HIGH_ACCURACY_ENABLED == 1) + nrf_drv_gpiote_in_config_t config = GPIOTE_CONFIG_IN_SENSE_TOGGLE(p_btn->hi_accuracy); +#else + nrf_drv_gpiote_in_config_t config = GPIOTE_CONFIG_IN_SENSE_TOGGLE(false); +#endif + config.pull = p_btn->pull_cfg; + + err_code = nrf_drv_gpiote_in_init(p_btn->pin_no, &config, gpiote_event_handler); + VERIFY_SUCCESS(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) +{ + ASSERT(mp_buttons); + + uint32_t i; + for (i = 0; i < m_button_count; i++) + { + nrf_drv_gpiote_in_event_enable(mp_buttons[i].pin_no, true); + } + + return NRF_SUCCESS; +} + + +uint32_t app_button_disable(void) +{ + ASSERT(mp_buttons); + + uint32_t i; + for (i = 0; i < m_button_count; i++) + { + nrf_drv_gpiote_in_event_disable(mp_buttons[i].pin_no); + } + + // Make sure polling timer is not running. + return app_timer_stop(m_detection_delay_timer_id); +} + + +bool app_button_is_pushed(uint8_t button_id) +{ + ASSERT(button_id <= m_button_count); + ASSERT(mp_buttons != NULL); + + app_button_cfg_t const * p_btn = &mp_buttons[button_id]; + bool is_set = nrf_drv_gpiote_in_is_set(p_btn->pin_no); + + return !(is_set ^ (p_btn->active_state == APP_BUTTON_ACTIVE_HIGH)); +} +#endif //NRF_MODULE_ENABLED(BUTTON) |