Utils.cpp

00001 /* mbed Microcontroller Library
00002 * Copyright (c) 2006-2013 ARM Limited
00003 *
00004 * Licensed under the Apache License, Version 2.0 (the "License");
00005 * you may not use this file except in compliance with the License.
00006 * You may obtain a copy of the License at
00007 *
00008 *     http://www.apache.org/licenses/LICENSE-2.0
00009 *
00010 * Unless required by applicable law or agreed to in writing, software
00011 * distributed under the License is distributed on an "AS IS" BASIS,
00012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013 * See the License for the specific language governing permissions and
00014 * limitations under the License.
00015 */
00016 
00017 #include "Utils.h"
00018 
00019 /**************************************************************************/
00020 /*!
00021     @brief  sets values of EN_HIGH_POWER and PA_LEVEL corresponding to dBMLevel of tx power
00022 
00023     @returns    value of tx power in dbm actually set
00024 
00025     @params[in] dBMLevel
00026                 dBMLevel of tx power to be set
00027                 
00028     @params[in] dBMLevel
00029                 dBMLevel of tx power to be set                
00030                 
00031     @endcode
00032 */
00033 /**************************************************************************/
00034 double getHighPowerAndPALevelValue(int8_t dBMLevel, int8_t& EN_HIGH_POWER, int8_t& PA_LEVEL) {
00035     double dbm = (double) dBMLevel;
00036     if(dbm<-18.0) {
00037         dbm = -18;
00038         EN_HIGH_POWER = 0;
00039         PA_LEVEL = 0;         
00040     }
00041     else if(dbm>8.0) {
00042         dbm = 8;
00043         EN_HIGH_POWER = 1;
00044         PA_LEVEL = 7;        
00045     }
00046     
00047     // As a policy we are setting tx power level to the higher side
00048     if((dbm>-18.0) && (dbm<=-15)) {
00049         // set tx power to -15dBM
00050         EN_HIGH_POWER = 0;
00051         PA_LEVEL = 0;
00052     }
00053     else if((dbm>-15) && (dbm<=-14.7)) {
00054         // set tx power to -14.7dBM
00055         EN_HIGH_POWER = 0;
00056         PA_LEVEL = 1;         
00057     }
00058     else if((dbm>-14.7) && (dbm<=-11.7)) {
00059         // set tx power to -11.7dBM
00060         EN_HIGH_POWER = 1;
00061         PA_LEVEL = 1;            
00062     }   
00063     else if((dbm>-11.7) && (dbm<=-11.4)) {
00064         // set tx power to -11.4dBM
00065         EN_HIGH_POWER = 0;
00066         PA_LEVEL = 2;            
00067     }
00068     else if((dbm>-11.4) && (dbm<=-8.4)) {
00069         // set tx power to -8.4dBM
00070         EN_HIGH_POWER = 1;
00071         PA_LEVEL = 2;           
00072     }  
00073     else if((dbm>-8.4) && (dbm<=-8.1)) {
00074         // set tx power to -8.1dBM
00075         EN_HIGH_POWER = 0;
00076         PA_LEVEL = 3;           
00077     }
00078     else if((dbm>-8.1) && (dbm<=-5.1)) {
00079         // set tx power to -5.1dBM
00080         EN_HIGH_POWER = 1;
00081         PA_LEVEL = 3;          
00082     }   
00083     else if((dbm>-5.1) && (dbm<=-4.9)) {
00084         // set tx power to -4.9dBM
00085         EN_HIGH_POWER = 0;
00086         PA_LEVEL = 4;            
00087     }
00088     else if((dbm>-4.9) && (dbm<=-2.1)) {
00089         // set tx power to -2.1dBM
00090         EN_HIGH_POWER = 1;
00091         PA_LEVEL = 4;          
00092     }
00093     else if((dbm>-2.1) && (dbm<=-1.6)) {
00094         // set tx power to -1.6dBM
00095         EN_HIGH_POWER = 0;
00096         PA_LEVEL = 5;           
00097     }
00098     else if((dbm>-1.6) && (dbm<=1.4)) {
00099         // set tx power to -1.6dBM
00100         EN_HIGH_POWER = 1;
00101         PA_LEVEL = 5;           
00102     }   
00103     else if((dbm>1.4) && (dbm<=1.7)) {
00104         // set tx power to 1.7dBM
00105         EN_HIGH_POWER = 0;
00106         PA_LEVEL = 6;            
00107     }
00108     else if((dbm>1.7) && (dbm<=4.7)) {
00109         // set tx power to 4.7dBM
00110         EN_HIGH_POWER = 1;
00111         PA_LEVEL = 6;            
00112     }  
00113     else if((dbm>4.7) && (dbm<=5.0)) {
00114         // set tx power to 5.0dBM
00115         EN_HIGH_POWER = 0;
00116         PA_LEVEL = 7;           
00117     }
00118     else if((dbm>5.0) && (dbm<=8)) {
00119         // set tx power to 8.0dBM
00120         EN_HIGH_POWER = 1;
00121         PA_LEVEL = 7;              
00122     }  
00123     
00124     return dbm;         
00125 }