text: /*
   * This file is part of the MicroPython project, http://micropython.org/
   *
   * The MIT License (MIT)
   *
   * Copyright (c) 2016 Glenn Ruben Bakke
   * Copyright (c) 2018 Artur Pacholec
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   * THE SOFTWARE.
   */
  
  #include <stdbool.h>
  #include <stdio.h>
  
  #include "ble.h"
  #include "ble_drv.h"
  #include "nrf_nvic.h"
  #include "nrf_sdm.h"
  #include "py/misc.h"
  
  nrf_nvic_state_t nrf_nvic_state = { 0 };
  
  __attribute__((aligned(4)))
  static uint8_t m_ble_evt_buf[sizeof(ble_evt_t) + (BLE_GATT_ATT_MTU_DEFAULT)];
  
  typedef struct event_handler {
      struct event_handler *next;
      void *param;
      ble_drv_evt_handler_t func;
  } event_handler_t;
  
  static event_handler_t *m_event_handlers = NULL;
  
  void ble_drv_reset() {
      // Linked list items will be gc'd.
      m_event_handlers = NULL;
  }
  
  void ble_drv_add_event_handler(ble_drv_evt_handler_t func, void *param) {
      event_handler_t *it = m_event_handlers;
      while (it != NULL) {
          // If event handler and its corresponding param are already on the list, don't add again.
          if ((it->func == func) && (it->param == param)) {
              return;
          }
          it = it->next;
      }
  
      // Add a new handler to the front of the list
      event_handler_t *handler = m_new_ll(event_handler_t, 1);
      handler->next = m_event_handlers;
      handler->param = param;
      handler->func = func;
  
      m_event_handlers = handler;
  }
  
  void ble_drv_remove_event_handler(ble_drv_evt_handler_t func, void *param) {
      event_handler_t *it = m_event_handlers;
      event_handler_t **prev = &m_event_handlers;
      while (it != NULL) {
          if ((it->func == func) && (it->param == param)) {
              // Splice out the matching handler.
              *prev = it->next;
              return;
          }
          prev = &(it->next);
          it = it->next;
      }
  }
  
  void SD_EVT_IRQHandler(void) {
      uint32_t evt_id;
      while (sd_evt_get(&evt_id) != NRF_ERROR_NOT_FOUND) {
  //        sd_evt_handler(evt_id);
      }
  
      while (1) {
          uint16_t evt_len = sizeof(m_ble_evt_buf);
          const uint32_t err_code = sd_ble_evt_get(m_ble_evt_buf, &evt_len);
          if (err_code != NRF_SUCCESS) {
              if (err_code == NRF_ERROR_DATA_SIZE) {
                  printf("NRF_ERROR_DATA_SIZE\n");
              }
  
              break;
          }
  
          event_handler_t *it = m_event_handlers;
          while (it != NULL) {
              it->func((ble_evt_t *)m_ble_evt_buf, it->param);
              it = it->next;
          }
      }
  }
  