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 }
00130