platform.c

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/*
 * Copyright (C) 2020 Yago Fontoura do Rosario <yago.rosario@hotmail.com.br>
 * 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 the copyright holder nor the names of its
 *    contributors 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.
 */
/*---------------------------------------------------------------------------*/
/**
 * \addtogroup nrf-platforms
 * @{
 *
 * \file
 *      Platform implementation for nRF
 * \author
 *      Yago Fontoura do Rosario <yago.rosario@hotmail.com.br>
 */
/*---------------------------------------------------------------------------*/
#include "contiki.h"
 
#include "dev/gpio-hal.h"
#include "dev/button-hal.h"
#include "dev/leds.h"
#include "dev/serial-line.h"
#include "lib/csprng.h"
 
#include "int-master.h"
#include "sensors.h"
#include "uarte-arch.h"
#include "linkaddr-arch.h"
#include "reset-arch.h"
 
#include "lpm.h"
#include "nrfx_config.h"
#include "usb.h"
 
/*---------------------------------------------------------------------------*/
/* Log configuration */
#include "sys/log.h"
#define LOG_MODULE "NRF"
#define LOG_LEVEL LOG_LEVEL_MAIN
/*---------------------------------------------------------------------------*/
#if NRF_HARDFAULT_HANDLER_EXTENDED
void hardfault_print_saved_crash(void);
#endif
/*---------------------------------------------------------------------------*/
__attribute__((weak)) void
platform_init_board(void)
{
}
/*---------------------------------------------------------------------------*/
__attribute__((weak)) void
platform_init_board_stage_two(void)
{
}
/*---------------------------------------------------------------------------*/
void
platform_init_stage_one(void)
{
  gpio_hal_init();
  platform_init_board();
  leds_init();
}
/*---------------------------------------------------------------------------*/
static void
feed_csprng(void)
{
#if defined(NRF_RNG) && CSPRNG_ENABLED
  struct csprng_seed seed;
 
  NRF_RNG->TASKS_START = 1;
  for(size_t i = 0; i < sizeof(seed); i++) {
    NRF_RNG->EVENTS_VALRDY = 0;
    while(!NRF_RNG->EVENTS_VALRDY);
    ((uint8_t *)&seed)[i] = NRF_RNG->VALUE;
  }
  NRF_RNG->TASKS_STOP = 1;
  csprng_feed(&seed);
#endif /* defined(NRF_RNG) && CSPRNG_ENABLED */
}
/*---------------------------------------------------------------------------*/
void
platform_init_stage_two(void)
{
  platform_init_board_stage_two();
  button_hal_init();
 
  /* There are two images of everything when building with
   * TrustZone, and uarte can only be initialized once,
   * so initialize in the secure mode. */
#if NRF_HAS_UARTE && !defined(NRF_TRUSTZONE_NONSECURE)
  uarte_init();
#if NRF_HARDFAULT_HANDLER_EXTENDED
  hardfault_print_saved_crash();
#endif
#endif /* NRF_HAS_UARTE */
 
#if NRF_HAS_USB && defined(NRF_NATIVE_USB) && NRF_NATIVE_USB == 1
  usb_init();
#endif /* NRF_HAS_USB && defined(NRF_NATIVE_USB) && NRF_NATIVE_USB == 1 */
 
  serial_line_init();
 
#if BUILD_WITH_SHELL
#if PLATFORM_DBG_CONF_USB
  usb_set_input(serial_line_input_byte);
#else /* PLATFORM_DBG_CONF_USB */
  uarte_set_input(serial_line_input_byte);
#endif /* PLATFORM_DBG_CONF_USB */
#endif /* BUILD_WITH_SHELL */
 
  populate_link_address();
 
  feed_csprng();
 
  reset_debug();
}
/*---------------------------------------------------------------------------*/
void
platform_init_stage_three(void)
{
  process_start(&sensors_process, NULL);
}
/*---------------------------------------------------------------------------*/
void
platform_idle()
{
  lpm_drop();
}
/*---------------------------------------------------------------------------*/
/**
 * @}
 */