nes-proj/drivers/platform/openmote-cc2538/dev/antenna.c

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/*
* Copyright (c) 2014, Thingsquare, http://www.thingsquare.com/.
* 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.
*
* This file is part of the Contiki operating system.
*
*/
/*---------------------------------------------------------------------------*/
/**
* \addtogroup openmote-antenna
* @{
*
* Driver for the OpenMote-CC2538 RF switch.
* INT is the internal antenna (chip) configured through ANT1_SEL (V1)
* EXT is the external antenna (connector) configured through ANT2_SEL (V2)
* @{
*
* \file
* Driver implementation for the OpenMote-CC2538 antenna switch
*/
/*---------------------------------------------------------------------------*/
#include "contiki-conf.h"
#include "dev/gpio.h"
#include "dev/antenna.h"
/*---------------------------------------------------------------------------*/
#define BSP_RADIO_BASE GPIO_PORT_TO_BASE(GPIO_D_NUM)
#define BSP_RADIO_INT GPIO_PIN_MASK(5)
#define BSP_RADIO_EXT GPIO_PIN_MASK(4)
/*---------------------------------------------------------------------------*/
void
antenna_init(void)
{
/* Configure the ANT1 and ANT2 GPIO as output */
GPIO_SET_OUTPUT(BSP_RADIO_BASE, BSP_RADIO_INT);
GPIO_SET_OUTPUT(BSP_RADIO_BASE, BSP_RADIO_EXT);
/* Select external antenna by default. */
antenna_external();
}
/*---------------------------------------------------------------------------*/
void
antenna_external(void)
{
GPIO_WRITE_PIN(BSP_RADIO_BASE, BSP_RADIO_INT, 0);
GPIO_WRITE_PIN(BSP_RADIO_BASE, BSP_RADIO_EXT, 1);
}
/*---------------------------------------------------------------------------*/
void
antenna_internal(void)
{
GPIO_WRITE_PIN(BSP_RADIO_BASE, BSP_RADIO_EXT, 0);
GPIO_WRITE_PIN(BSP_RADIO_BASE, BSP_RADIO_INT, 1);
}
/*---------------------------------------------------------------------------*/
/**
* @}
* @}
*/