100 lines
3.5 KiB
C
100 lines
3.5 KiB
C
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/*
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* Copyright (c) 2014, Thingsquare, http://www.thingsquare.com/.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/**
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* \addtogroup platform
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* @{
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*
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* \defgroup openmote
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*
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* \file
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* Driver for the antenna selection on the OpenMote-CC2538 platform.
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*/
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/*---------------------------------------------------------------------------*/
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#include "contiki-conf.h"
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#include "dev/gpio.h"
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#include "dev/antenna.h"
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/*---------------------------------------------------------------------------*/
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#define BSP_RADIO_BASE (GPIO_D_BASE)
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#define BSP_RADIO_INT (1 << 5)
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#define BSP_RADIO_EXT (1 << 4)
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/*---------------------------------------------------------------------------*/
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static void
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gpio_set(int port, int bit)
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{
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REG((port | GPIO_DATA) + (bit << 2)) = bit;
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}
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/*---------------------------------------------------------------------------*/
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static void
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gpio_reset(int port, int bit)
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{
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REG((port | GPIO_DATA) + (bit << 2)) = 0;
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}
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/*---------------------------------------------------------------------------*/
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/**
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* Configure the antenna using the RF switch
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* INT is the internal antenna (chip) configured through ANT1_SEL (V1)
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* EXT is the external antenna (connector) configured through ANT2_SEL (V2)
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*/
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void
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antenna_init(void)
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{
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/* Configure the ANT1 and ANT2 GPIO as output */
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GPIO_SET_OUTPUT(BSP_RADIO_BASE, BSP_RADIO_INT);
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GPIO_SET_OUTPUT(BSP_RADIO_BASE, BSP_RADIO_EXT);
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/* Select external antenna by default. */
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antenna_external();
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}
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/*---------------------------------------------------------------------------*/
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/**
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* Select the external (connector) antenna
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*/
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void
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antenna_external(void)
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{
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gpio_reset(BSP_RADIO_BASE, BSP_RADIO_INT);
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gpio_set(BSP_RADIO_BASE, BSP_RADIO_EXT);
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}
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/*---------------------------------------------------------------------------*/
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/**
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* Select the internal (chip) antenna
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*/
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void
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antenna_internal(void)
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{
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gpio_reset(BSP_RADIO_BASE, BSP_RADIO_EXT);
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gpio_set(BSP_RADIO_BASE, BSP_RADIO_INT);
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}
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/*---------------------------------------------------------------------------*/
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/** @} */
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