wilink_6_1/utils/freq.c

/*
 * freq.c
 *
 * Copyright(c) 1998 - 2009 Texas Instruments. All rights reserved.      
 * All rights reserved.                                                  
 *                                                                       
 * Redistribution and use in source and binary forms, with or without    
 * modification, are permitted provided that the following conditions    
 * are met:                                                              
 *                                                                       
 *  * Redistributions of source code must retain the above copyright     
 *    notice, this list of conditions and the following disclaimer.      
 *  * 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.                                                      
 *  * Neither the name Texas Instruments 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  
 * OWNER 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, 
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 * 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.
 */

/** \file  freq.c
 *  \brief frequency to channel (and vice versa) conversion implementation
 *
 *  \see   freq.h
 */


#define __FILE_ID__  FILE_ID_126
#include "osTIType.h"

#define     CHAN_FREQ_TABLE_SIZE        (sizeof(ChanFreq) / sizeof(CHAN_FREQ))

typedef struct {
    TI_UINT8       chan;
    TI_UINT32      freq;
} CHAN_FREQ;

static CHAN_FREQ ChanFreq[] = {
    {1,  2412000},
    {2,  2417000},
    {3,  2422000},
    {4,  2427000},
    {5,  2432000},
    {6,  2437000},
    {7,  2442000},
    {8,  2447000},
    {9,  2452000},
    {10, 2457000},
    {11, 2462000},
    {12, 2467000},
    {13, 2472000}, 
    {14, 2484000}, 
    {34, 5170000},
    {36, 5180000},
    {38, 5190000},
    {40, 5200000},
    {42, 5210000},
    {44, 5220000},
    {46, 5230000}, 
    {48, 5240000},
    {52, 5260000},
    {56, 5280000},
    {60, 5300000},
    {64, 5320000},
    {100,5500000},
    {104,5520000},
    {108,5540000},
    {112,5560000},
    {116,5580000},
    {120,5600000},
    {124,5620000},
    {128,5640000},
    {132,5660000},
    {136,5680000},
    {140,5700000},
    {149,5745000},
    {153,5765000},
    {157,5785000},
    {161,5805000}
  };

TI_UINT8 Freq2Chan (TI_UINT32 freq)
{
    TI_UINT32   i;

    for (i = 0; i < CHAN_FREQ_TABLE_SIZE; i++)
    {
        if (ChanFreq[ i ].freq == freq)
        {
            return ChanFreq[ i ].chan;
        }
    }

    return 0;
}


TI_UINT32 Chan2Freq (TI_UINT8 chan)
{
    TI_UINT32   i;

    for (i = 0; i < CHAN_FREQ_TABLE_SIZE; i++)
    {
        if (ChanFreq[ i ].chan == chan)
        {
            return ChanFreq[ i ].freq;
        }
    }

    return 0;
}