contiki/core/dev/cc2420_misc.h

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2006-08-09 17:39:39 +00:00
/*
* Copyright (c) 2006, Swedish Institute of Computer Science
* 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.
*
* @(#)$Id: cc2420_misc.h,v 1.1 2006/08/09 17:39:39 bg- Exp $
*/
#ifndef CC2420_MISC_H
#define CC2420_MISC_H
/*
* Miscellaneous routines that illustrates how some of the CC2420
* registers may be accessed.
*/
unsigned cc2420_pa_level(u16_t);
unsigned cc2420_get_pa_level(void);
int cc2420_get_current_rssi(void);
#define PA_LEVEL 0x1F
inline
unsigned
cc2420_pa_level(u16_t p)
{
u16_t reg;
/*
* All PA settings can be used, the ones given in the datasheet
* correspond to 0, -1, -3, -5, -7, -10, -15, -25 dBm in the
* reference design.
*/
if (p > PA_LEVEL)
p = PA_LEVEL;
reg = cc2420_getreg(CC2420_TXCTRL);
p |= reg & ~PA_LEVEL;
cc2420_setreg(CC2420_TXCTRL, p);
return reg & PA_LEVEL;
}
inline
unsigned
cc2420_get_pa_level(void)
{
u16_t reg;
reg = cc2420_getreg(CC2420_TXCTRL);
return reg & PA_LEVEL;
}
inline
int
cc2420_get_current_rssi(void)
{
u16_t reg;
reg = cc2420_getreg(CC2420_RSSI);
return (signed char) (reg & 0xff);
}
#endif /* CC2420_MISC_H */