Nordic stack and drivers for the mbed BLE API
Dependents: Sensen-classic-v8-IAQ_copy_4
Fork of nRF51822 by
Diff: TARGET_MCU_NRF51822/sdk/source/softdevice/common/softdevice_handler/softdevice_handler.c
- Revision:
- 638:c90ae1400bf2
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/TARGET_MCU_NRF51822/sdk/source/softdevice/common/softdevice_handler/softdevice_handler.c Wed Sep 14 14:39:43 2016 +0100 @@ -0,0 +1,346 @@ +/* + * Copyright (c) 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 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 other + * contributors to this software may be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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 "softdevice_handler.h" +#include <stdlib.h> +#include "nordic_common.h" +#include "app_error.h" +#include "app_util.h" +#include "nrf_assert.h" +#include "nrf_soc.h" +#include "nrf.h" + +#if defined(ANT_STACK_SUPPORT_REQD) && defined(BLE_STACK_SUPPORT_REQD) + #include "ant_interface.h" +#elif defined(ANT_STACK_SUPPORT_REQD) + #include "ant_interface.h" +#elif defined(BLE_STACK_SUPPORT_REQD) + #include "nrf_ble.h" +#endif + +#ifdef NRF51 +#define SOFTDEVICE_EVT_IRQ SD_EVT_IRQn /**< SoftDevice Event IRQ number. Used for both protocol events and SoC events. */ +#define SOFTDEVICE_EVT_IRQHandler SD_EVT_IRQHandler +#elif defined (NRF52) +#define SOFTDEVICE_EVT_IRQ SWI2_EGU2_IRQn +#define SOFTDEVICE_EVT_IRQHandler SWI2_EGU2_IRQHandler +#endif /* NRF51 */ + +static softdevice_evt_schedule_func_t m_evt_schedule_func; /**< Pointer to function for propagating SoftDevice events to the scheduler. */ + +static volatile bool m_softdevice_enabled = false; /**< Variable to indicate whether the SoftDevice is enabled. */ + +#ifdef BLE_STACK_SUPPORT_REQD +// The following three definitions is needed only if BLE events are needed to be pulled from the stack. +static uint8_t * mp_ble_evt_buffer; /**< Buffer for receiving BLE events from the SoftDevice. */ +static uint16_t m_ble_evt_buffer_size; /**< Size of BLE event buffer. */ +static ble_evt_handler_t m_ble_evt_handler; /**< Application event handler for handling BLE events. */ +#endif + +#ifdef ANT_STACK_SUPPORT_REQD +// The following two definition is needed only if ANT events are needed to be pulled from the stack. +static ant_evt_t m_ant_evt_buffer; /**< Buffer for receiving ANT events from the SoftDevice. */ +static ant_evt_handler_t m_ant_evt_handler; /**< Application event handler for handling ANT events. */ +#endif + +static sys_evt_handler_t m_sys_evt_handler; /**< Application event handler for handling System (SOC) events. */ + + +/**@brief Callback function for asserts in the SoftDevice. + * + * @details A pointer to this function will be passed to the SoftDevice. This function will be + * called if an ASSERT statement in the SoftDevice fails. + * + * @param[in] pc The value of the program counter when the ASSERT call failed. + * @param[in] line_num Line number of the failing ASSERT call. + * @param[in] file_name File name of the failing ASSERT call. + */ +void softdevice_assertion_handler(uint32_t pc, uint16_t line_num, const uint8_t * file_name) +{ + UNUSED_PARAMETER(pc); + assert_nrf_callback(line_num, file_name); +} + + +void intern_softdevice_events_execute(void) +{ + if (!m_softdevice_enabled) + { + // SoftDevice not enabled. This can be possible if the SoftDevice was enabled by the + // application without using this module's API (i.e softdevice_handler_init) + + return; + } + + bool no_more_soc_evts = (m_sys_evt_handler == NULL); +#ifdef BLE_STACK_SUPPORT_REQD + bool no_more_ble_evts = (m_ble_evt_handler == NULL); +#endif +#ifdef ANT_STACK_SUPPORT_REQD + bool no_more_ant_evts = (m_ant_evt_handler == NULL); +#endif + + for (;;) + { + uint32_t err_code; + + if (!no_more_soc_evts) + { + uint32_t evt_id; + + // Pull event from SOC. + err_code = sd_evt_get(&evt_id); + + if (err_code == NRF_ERROR_NOT_FOUND) + { + no_more_soc_evts = true; + } + else if (err_code != NRF_SUCCESS) + { + APP_ERROR_HANDLER(err_code); + } + else + { + // Call application's SOC event handler. + m_sys_evt_handler(evt_id); + } + } + +#ifdef BLE_STACK_SUPPORT_REQD + // Fetch BLE Events. + if (!no_more_ble_evts) + { + // Pull event from stack + uint16_t evt_len = m_ble_evt_buffer_size; + + err_code = sd_ble_evt_get(mp_ble_evt_buffer, &evt_len); + if (err_code == NRF_ERROR_NOT_FOUND) + { + no_more_ble_evts = true; + } + else if (err_code != NRF_SUCCESS) + { + APP_ERROR_HANDLER(err_code); + } + else + { + // Call application's BLE stack event handler. + m_ble_evt_handler((ble_evt_t *)mp_ble_evt_buffer); + } + } +#endif + +#ifdef ANT_STACK_SUPPORT_REQD + // Fetch ANT Events. + if (!no_more_ant_evts) + { + // Pull event from stack + err_code = sd_ant_event_get(&m_ant_evt_buffer.channel, + &m_ant_evt_buffer.event, + m_ant_evt_buffer.evt_buffer); + if (err_code == NRF_ERROR_NOT_FOUND) + { + no_more_ant_evts = true; + } + else if (err_code != NRF_SUCCESS) + { + APP_ERROR_HANDLER(err_code); + } + else + { + // Call application's ANT stack event handler. + m_ant_evt_handler(&m_ant_evt_buffer); + } + } +#endif + + if (no_more_soc_evts) + { + // There are no remaining System (SOC) events to be fetched from the SoftDevice. +#if defined(ANT_STACK_SUPPORT_REQD) && defined(BLE_STACK_SUPPORT_REQD) + // Check if there are any remaining BLE and ANT events. + if (no_more_ble_evts && no_more_ant_evts) + { + break; + } +#elif defined(BLE_STACK_SUPPORT_REQD) + // Check if there are any remaining BLE events. + if (no_more_ble_evts) + { + break; + } +#elif defined(ANT_STACK_SUPPORT_REQD) + // Check if there are any remaining ANT events. + if (no_more_ant_evts) + { + break; + } +#else + // No need to check for BLE or ANT events since there is no support for BLE and ANT + // required. + break; +#endif + } + } +} + +bool softdevice_handler_isEnabled(void) +{ + return m_softdevice_enabled; +} + +uint32_t softdevice_handler_init(nrf_clock_lfclksrc_t clock_source, + void * p_ble_evt_buffer, + uint16_t ble_evt_buffer_size, + softdevice_evt_schedule_func_t evt_schedule_func) +{ + uint32_t err_code; + + // Save configuration. +#if defined (BLE_STACK_SUPPORT_REQD) + // Check that buffer is not NULL. + if (p_ble_evt_buffer == NULL) + { + return NRF_ERROR_INVALID_PARAM; + } + + // Check that buffer is correctly aligned. + if (!is_word_aligned(p_ble_evt_buffer)) + { + return NRF_ERROR_INVALID_PARAM; + } + + mp_ble_evt_buffer = (uint8_t *)p_ble_evt_buffer; + m_ble_evt_buffer_size = ble_evt_buffer_size; +#else + // The variables p_ble_evt_buffer and ble_evt_buffer_size is not needed if BLE Stack support + // is not required. + UNUSED_PARAMETER(p_ble_evt_buffer); + UNUSED_PARAMETER(ble_evt_buffer_size); +#endif + + m_evt_schedule_func = evt_schedule_func; + +//Enabling FPU for SoftDevice +#ifdef S132 + SCB->CPACR |= (3UL << 20) | (3UL << 22); + __DSB(); + __ISB(); +#endif + // Initialize SoftDevice. + err_code = sd_softdevice_enable(clock_source, softdevice_assertion_handler); + if (err_code != NRF_SUCCESS) + { + return err_code; + } +#ifdef S132 + SCB->CPACR = 0; + __DSB(); + __ISB(); +#endif + + m_softdevice_enabled = true; + + // Enable BLE event interrupt (interrupt priority has already been set by the stack). + return sd_nvic_EnableIRQ(SOFTDEVICE_EVT_IRQ); +} + + +uint32_t softdevice_handler_sd_disable(void) +{ + uint32_t err_code = sd_softdevice_disable(); + + m_softdevice_enabled = !(err_code == NRF_SUCCESS); + + return err_code; +} + + +#ifdef BLE_STACK_SUPPORT_REQD +uint32_t softdevice_ble_evt_handler_set(ble_evt_handler_t ble_evt_handler) +{ + if (ble_evt_handler == NULL) + { + return NRF_ERROR_NULL; + } + + m_ble_evt_handler = ble_evt_handler; + + return NRF_SUCCESS; +} +#endif + + +#ifdef ANT_STACK_SUPPORT_REQD +uint32_t softdevice_ant_evt_handler_set(ant_evt_handler_t ant_evt_handler) +{ + if (ant_evt_handler == NULL) + { + return NRF_ERROR_NULL; + } + + m_ant_evt_handler = ant_evt_handler; + + return NRF_SUCCESS; +} +#endif + + +uint32_t softdevice_sys_evt_handler_set(sys_evt_handler_t sys_evt_handler) +{ + if (sys_evt_handler == NULL) + { + return NRF_ERROR_NULL; + } + + m_sys_evt_handler = sys_evt_handler; + + return NRF_SUCCESS; +} + + +/**@brief Function for handling the Application's BLE Stack events interrupt. + * + * @details This function is called whenever an event is ready to be pulled. + */ +void SOFTDEVICE_EVT_IRQHandler(void) +{ + if (m_evt_schedule_func != NULL) + { + uint32_t err_code = m_evt_schedule_func(); + APP_ERROR_CHECK(err_code); + } + else + { + intern_softdevice_events_execute(); + } +}