text: /*
   * Copyright (c) 2006-2020, RT-Thread Development Team
   *
   * SPDX-License-Identifier: Apache-2.0
   *
   * Change Logs:
   * Date           Author       Notes
   * 2020-04-29     supperthomas first version
   *
   */
  #include <rtthread.h>
  #include <rthw.h>
  #include <nrfx_systick.h>
  
  #include "board.h"
  #include "drv_uart.h"
  #ifdef BSP_USING_SOFTDEVICE
  #include <nrfx_rtc.h>
  #include <nrfx_clock.h>
  #include "app_error.h"
  #include "nrf_drv_clock.h"
  const nrfx_rtc_t rtc = NRFX_RTC_INSTANCE(1); /**< Declaring an instance of nrf_drv_rtc for RTC0. */
  
  static void rtc_handler(nrfx_rtc_int_type_t int_type)
  {
      if (int_type == NRFX_RTC_INT_TICK)
      {
          rt_interrupt_enter();
  
          rt_tick_increase();
  
          rt_interrupt_leave();
      }
  }
  #else
  /**
   * This is the timer interrupt service routine.
   *
   */
  void SysTick_Handler(void)
  {
      /* enter interrupt */
      rt_interrupt_enter();
  
      rt_tick_increase();
  
      /* leave interrupt */
      rt_interrupt_leave();
  }
  #endif
  void SysTick_Configuration(void)
  {
  #ifdef BSP_USING_SOFTDEVICE
      nrf_drv_clock_init();
      nrf_drv_clock_lfclk_request(NULL);
  
      uint32_t err_code;
  #define TICK_RATE_HZ  RT_TICK_PER_SECOND
  #define SYSTICK_CLOCK_HZ  ( 32768UL )
  
  #define NRF_RTC_REG        NRF_RTC1
      /* IRQn used by the selected RTC */
  #define NRF_RTC_IRQn       RTC1_IRQn
      /* Constants required to manipulate the NVIC. */
  #define NRF_RTC_PRESCALER  ( (uint32_t) (NRFX_ROUNDED_DIV(SYSTICK_CLOCK_HZ, TICK_RATE_HZ) - 1) )
      nrfx_rtc_config_t config = NRFX_RTC_DEFAULT_CONFIG;
      config.prescaler = NRF_RTC_PRESCALER;
  
      err_code = nrfx_rtc_init(&rtc, &config, rtc_handler);
      // APP_ERROR_CHECK(err_code);
      nrfx_rtc_tick_enable(&rtc, true);
  #define COMPARE_COUNTERTIME  (3UL)                                        /**< Get Compare event COMPARE_TIME seconds after the counter starts from 0. */
      //Set compare channel to trigger interrupt after COMPARE_COUNTERTIME seconds
      err_code = nrfx_rtc_cc_set(&rtc, 0, COMPARE_COUNTERTIME * 8, true);
      // APP_ERROR_CHECK(err_code);
  
      //Power on RTC instance
      nrfx_rtc_enable(&rtc);
  #else
      /* Set interrupt priority */
      NVIC_SetPriority(SysTick_IRQn, 0xf);
  
      /* Configure SysTick to interrupt at the requested rate. */
      nrf_systick_load_set(SystemCoreClock / RT_TICK_PER_SECOND);
      nrf_systick_val_clear();
      nrf_systick_csr_set(NRF_SYSTICK_CSR_CLKSOURCE_CPU | NRF_SYSTICK_CSR_TICKINT_ENABLE
                          | NRF_SYSTICK_CSR_ENABLE);
  #endif
  }
  
  
  void rt_hw_board_init(void)
  {
      rt_hw_interrupt_enable(0);
      // sd_power_dcdc_mode_set(NRF_POWER_DCDC_ENABLE);
      /* Activate deep sleep mode */
      SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
  
      SysTick_Configuration();
  
  #if defined(RT_USING_HEAP)
      rt_system_heap_init((void *)HEAP_BEGIN, (void *)HEAP_END);
  #endif
  
  #ifdef RT_USING_SERIAL
      rt_hw_uart_init();
  #endif
  
  #ifdef RT_USING_CONSOLE
      rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
  #endif
  
  #ifdef RT_USING_COMPONENTS_INIT
      rt_components_board_init();
  #endif
  
  #ifdef BSP_USING_SOFTDEVICE
      extern uint32_t  Image$$RW_IRAM1$$Base;
      uint32_t const *const m_ram_start  = &Image$$RW_IRAM1$$Base;
      if ((uint32_t)m_ram_start == 0x20000000)
      {
          rt_kprintf("\r\n using softdevice the RAM couldn't be %p,please use the templete from package\r\n", m_ram_start);
          while (1);
      }
      else
      {
          rt_kprintf("\r\n using softdevice the RAM at %p\r\n", m_ram_start);
      }
  #endif
  
  }
  
  