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 #if NEED_CONSOLE_OUTPUT
00020 Serial  pc(USBTX, USBRX);
00021 #endif /* #if NEED_CONSOLE_OUTPUT */
00022 
00023 /**************************************************************************/
00024 /*!
00025     @brief  sets values of EN_HIGH_POWER and PA_LEVEL corresponding to dBMLevel of tx power
00026 
00027     @returns    value of tx power in dbm actually set
00028 
00029     @params[in] dBMLevel
00030                 dBMLevel of tx power to be set
00031                 
00032     @params[in] dBMLevel
00033                 dBMLevel of tx power to be set                
00034                 
00035     @endcode
00036 */
00037 /**************************************************************************/
00038 double getHighPowerAndPALevelValue(int8_t dBMLevel, int8_t& EN_HIGH_POWER, int8_t& PA_LEVEL) {
00039     double dbm = (double) dBMLevel;
00040     if(dbm<-18.0) {
00041         dbm = -18;
00042         EN_HIGH_POWER = 0;
00043         PA_LEVEL = 0;         
00044     }
00045     else if(dbm>8.0) {
00046         dbm = 8;
00047         EN_HIGH_POWER = 1;
00048         PA_LEVEL = 7;        
00049     }
00050     
00051     // As a policy we are setting tx power level to the higher side
00052     if((dbm>-18.0) && (dbm<=-15)) {
00053         // set tx power to -15dBM
00054         EN_HIGH_POWER = 0;
00055         PA_LEVEL = 0;
00056     }
00057     else if((dbm>-15) && (dbm<=-14.7)) {
00058         // set tx power to -14.7dBM
00059         EN_HIGH_POWER = 0;
00060         PA_LEVEL = 1;         
00061     }
00062     else if((dbm>-14.7) && (dbm<=-11.7)) {
00063         // set tx power to -11.7dBM
00064         EN_HIGH_POWER = 1;
00065         PA_LEVEL = 1;            
00066     }   
00067     else if((dbm>-11.7) && (dbm<=-11.4)) {
00068         // set tx power to -11.4dBM
00069         EN_HIGH_POWER = 0;
00070         PA_LEVEL = 2;            
00071     }
00072     else if((dbm>-11.4) && (dbm<=-8.4)) {
00073         // set tx power to -8.4dBM
00074         EN_HIGH_POWER = 1;
00075         PA_LEVEL = 2;           
00076     }  
00077     else if((dbm>-8.4) && (dbm<=-8.1)) {
00078         // set tx power to -8.1dBM
00079         EN_HIGH_POWER = 0;
00080         PA_LEVEL = 3;           
00081     }
00082     else if((dbm>-8.1) && (dbm<=-5.1)) {
00083         // set tx power to -5.1dBM
00084         EN_HIGH_POWER = 1;
00085         PA_LEVEL = 3;          
00086     }   
00087     else if((dbm>-5.1) && (dbm<=-4.9)) {
00088         // set tx power to -4.9dBM
00089         EN_HIGH_POWER = 0;
00090         PA_LEVEL = 4;            
00091     }
00092     else if((dbm>-4.9) && (dbm<=-2.1)) {
00093         // set tx power to -2.1dBM
00094         EN_HIGH_POWER = 1;
00095         PA_LEVEL = 4;          
00096     }
00097     else if((dbm>-2.1) && (dbm<=-1.6)) {
00098         // set tx power to -1.6dBM
00099         EN_HIGH_POWER = 0;
00100         PA_LEVEL = 5;           
00101     }
00102     else if((dbm>-1.6) && (dbm<=1.4)) {
00103         // set tx power to -1.6dBM
00104         EN_HIGH_POWER = 1;
00105         PA_LEVEL = 5;           
00106     }   
00107     else if((dbm>1.4) && (dbm<=1.7)) {
00108         // set tx power to 1.7dBM
00109         EN_HIGH_POWER = 0;
00110         PA_LEVEL = 6;            
00111     }
00112     else if((dbm>1.7) && (dbm<=4.7)) {
00113         // set tx power to 4.7dBM
00114         EN_HIGH_POWER = 1;
00115         PA_LEVEL = 6;            
00116     }  
00117     else if((dbm>4.7) && (dbm<=5.0)) {
00118         // set tx power to 5.0dBM
00119         EN_HIGH_POWER = 0;
00120         PA_LEVEL = 7;           
00121     }
00122     else if((dbm>5.0) && (dbm<=8)) {
00123         // set tx power to 8.0dBM
00124         EN_HIGH_POWER = 1;
00125         PA_LEVEL = 7;              
00126     }  
00127     
00128     return dbm;         
00129 }