platform.c

/*
 * Copyright (c) 2015, Nordic Semiconductor
 * 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 Institute 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 INSTITUTE 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 INSTITUTE 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 nrf52840dk nRF52840 Development Kit
 * @{
 */
#include "contiki.h"
#include "nordic_common.h"
 
#include "sdk_config.h"
#include "nrfx_gpiote.h"
#include <nrfx_rng.h>
#include "nrf.h"
 
#include "contiki-net.h"
#include "leds.h"
#include "lib/csprng.h"
#include "lib/sensors.h"
#include "dev/button-hal.h"
 
#include "dev/serial-line.h"
#include "dev/uart0.h"
#include "usb/usb-serial.h"
#include "usb/usb-dfu-trigger.h"
#include "lpm.h"
 
#include <stdio.h>
#include <stdint.h>
#include <string.h>
 
/*---------------------------------------------------------------------------*/
/* Log configuration */
#include "sys/log.h"
#define LOG_MODULE "NRF52DK"
#define LOG_LEVEL LOG_LEVEL_MAIN
/*---------------------------------------------------------------------------*/
/* Nordic semi OUI */
#define NORDIC_SEMI_VENDOR_OUI 0xF4CE36
/*---------------------------------------------------------------------------*/
static void
populate_link_address(void)
{
  uint8_t device_address[8];
  uint32_t device_address_low;
 
  /*
   * Populate the link address' 3 MSBs using Nordic's OUI.
   * For the remaining 5 bytes just use any 40 of the 48 FICR->DEVICEADDR
   * Those are random, so endianness is irrelevant.
   */
  device_address[0] = (NORDIC_SEMI_VENDOR_OUI) >> 16 & 0xFF;
  device_address[1] = (NORDIC_SEMI_VENDOR_OUI) >> 8 & 0xFF;
  device_address[2] = NORDIC_SEMI_VENDOR_OUI & 0xFF;
  device_address[3] = NRF_FICR->DEVICEADDR[1] & 0xFF;
 
  device_address_low = NRF_FICR->DEVICEADDR[0];
  memcpy(&device_address[4], &device_address_low, 4);
 
  memcpy(&linkaddr_node_addr, &device_address[8 - LINKADDR_SIZE],
         LINKADDR_SIZE);
}
/*---------------------------------------------------------------------------*/
void
platform_init_stage_one(void)
{
  gpio_hal_init();
  leds_init();
}
/*---------------------------------------------------------------------------*/
static void
feed_csprng(void)
{
#if CSPRNG_ENABLED
  struct csprng_seed seed;
 
  NRF_RNG->TASKS_START = 1;
  for(size_t i = 0; i < sizeof(seed.u8); i++) {
    NRF_RNG->EVENTS_VALRDY = 0;
    while(!NRF_RNG->EVENTS_VALRDY);
    seed.u8[i] = NRF_RNG->VALUE;
  }
  NRF_RNG->TASKS_STOP = 1;
  csprng_feed(&seed);
#endif /* CSPRNG_ENABLED */
}
/*---------------------------------------------------------------------------*/
void
platform_init_stage_two(void)
{
#ifdef PLATFORM_HAS_BUTTON
  button_hal_init();
#endif
 
#if UART0_ENABLED
  uart0_init();
  serial_line_init();
#if BUILD_WITH_SHELL
  uart0_set_input(serial_line_input_byte);
#endif
#endif
 
#if NRF52840_NATIVE_USB
  usb_serial_init();
  serial_line_init();
#if BUILD_WITH_SHELL
  usb_serial_set_input(serial_line_input_byte);
#endif
#endif
 
#if NRF52840_USB_DFU_TRIGGER
  dfu_trigger_usb_init();
#endif
 
  populate_link_address();
 
  feed_csprng();
}
/*---------------------------------------------------------------------------*/
void
platform_init_stage_three(void)
{
  process_start(&sensors_process, NULL);
}
/*---------------------------------------------------------------------------*/
void
platform_idle()
{
  lpm_drop();
}
/*---------------------------------------------------------------------------*/
/**
 * @}
 */