nes-proj/platform/zoul/dev/antenna-sw.c
2016-09-01 15:04:54 +02:00

117 lines
4.2 KiB
C

/*
* Copyright (c) 2015, Zolertia
* 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 remote-antenna
* @{
*
* Driver for the RE-Mote RF switch, to enable either the built-in 2.4GHz RF
* interface of the CC2538, or the CC1200 Sub-1GHz RF interface, both routed to
* the RP-SMA connector for an external antenna.
* When the 2.4GHz RF interface is enabled, the CC1200 is powered down.
* When the CC1200 is enabled, alternatively the 2.4GHz can be also used if
* placing an 0Ohm resistor (R19), to connect either via a non-mounted chip
* antenna, or with an external antenna connected to a non-mounted U.Fl
* connector with a pigtail.
*
* RF switch state:
* - LOW: 2.4GHz RF interface on RP-SMA connector, CC1200 powered-off.
* - HIGH: Sub-1GHz RF interface on RP-SMA connector.
* @{
*
* \file
* Driver for the RE-Mote RF antenna switch
*/
/*---------------------------------------------------------------------------*/
#include "contiki.h"
#include "dev/gpio.h"
#include "antenna-sw.h"
#include <stdint.h>
/*---------------------------------------------------------------------------*/
#define ANTENNA_RF_SW_PORT_BASE GPIO_PORT_TO_BASE(ANTENNA_RF_SW_PORT)
#define ANTENNA_RF_SW_PIN_MASK GPIO_PIN_MASK(ANTENNA_RF_SW_PIN)
/*---------------------------------------------------------------------------*/
static uint8_t initialized = 0;
/*---------------------------------------------------------------------------*/
void
antenna_sw_config(void)
{
/* Software controlled */
GPIO_SOFTWARE_CONTROL(ANTENNA_RF_SW_PORT_BASE,
ANTENNA_RF_SW_PIN_MASK);
/* Set pin to output */
GPIO_SET_OUTPUT(ANTENNA_RF_SW_PORT_BASE, ANTENNA_RF_SW_PIN_MASK);
/* Set the antenna selector to a default position */
GPIO_WRITE_PIN(ANTENNA_RF_SW_PORT_BASE, ANTENNA_RF_SW_PIN_MASK,
ANTENNA_SW_SELECT_DEFAULT);
initialized = 1;
}
/*---------------------------------------------------------------------------*/
int
antenna_sw_get(void)
{
if(!initialized) {
return ANTENNA_SW_SELECT_ERROR;
}
/* Set the antenna selector */
return GPIO_READ_PIN(ANTENNA_RF_SW_PORT_BASE, ANTENNA_RF_SW_PIN_MASK);
}
/*---------------------------------------------------------------------------*/
int
antenna_sw_select(uint8_t val)
{
if(!initialized) {
return ANTENNA_SW_SELECT_ERROR;
}
if(val != ANTENNA_SW_SELECT_SUBGHZ && val != ANTENNA_SW_SELECT_2_4GHZ) {
return ANTENNA_SW_SELECT_ERROR;
}
if(val & antenna_sw_get()) {
return val;
}
/* Set the antenna selector */
GPIO_WRITE_PIN(ANTENNA_RF_SW_PORT_BASE, ANTENNA_RF_SW_PIN_MASK, val);
return val;
}
/*---------------------------------------------------------------------------*/
/**
* @}
* @}
*/