sx1276-hal.cpp

00001 /*
00002  / _____)             _              | |
00003 ( (____  _____ ____ _| |_ _____  ____| |__
00004  \____ \| ___ |    (_   _) ___ |/ ___)  _ \
00005  _____) ) ____| | | || |_| ____( (___| | | |
00006 (______/|_____)_|_|_| \__)_____)\____)_| |_|
00007     (C) 2014 Semtech
00008 
00009 Description: -
00010 
00011 License: Revised BSD License, see LICENSE.TXT file include in the project
00012 
00013 Maintainers: Miguel Luis, Gregory Cristian and Nicolas Huguenin
00014 */
00015 #include "sx1276-hal.h"
00016 
00017 const RadioRegisters_t  SX1276MB1xAS::RadioRegsInit[] = RADIO_INIT_REGISTERS_VALUE;
00018 
00019 SX1276MB1xAS::SX1276MB1xAS( RadioEvents_t *events,
00020                             PinName mosi, PinName miso, PinName sclk, PinName nss, PinName reset,
00021                             PinName dio0, PinName dio1, PinName dio2, PinName dio3, PinName dio4, PinName dio5,
00022                             PinName antSwitch )
00023                             : SX1276 ( events, mosi, miso, sclk, nss, reset, dio0, dio1, dio2, dio3, dio4, dio5 ),
00024                             AntSwitch( antSwitch ),
00025                         #if( defined ( TARGET_NUCLEO_L152RE ) )
00026                             Fake( D8 )
00027                         #else
00028                             Fake( A3 )
00029                         #endif
00030 {
00031     this->RadioEvents = events;
00032 
00033     Reset( );
00034 
00035     RxChainCalibration( );
00036 
00037     IoInit( );
00038 
00039     SetOpMode( RF_OPMODE_SLEEP );
00040 
00041     IoIrqInit( dioIrq );
00042 
00043     RadioRegistersInit( );
00044 
00045     SetModem( MODEM_FSK );
00046 
00047     this->settings.State = RF_IDLE ;
00048 }
00049 
00050 SX1276MB1xAS::SX1276MB1xAS( RadioEvents_t *events )
00051                         #if defined ( TARGET_NUCLEO_L152RE )
00052                         :   SX1276 ( events, D11, D12, D13, D10, A0, D2, D3, D4, D5, A3, D9 ), // For NUCLEO L152RE dio4 is on port A3
00053                             AntSwitch( A4 ),
00054                             Fake( D8 )
00055                         #elif defined( TARGET_LPC11U6X )
00056                         :   SX1276 ( events, D11, D12, D13, D10, A0, D2, D3, D4, D5, D8, D9 ),
00057                             AntSwitch( P0_23 ), 
00058                             Fake( A3 )
00059                         #else
00060                         :   SX1276 ( events, PB_5, PB_4, PB_3, PA_15, PB_6, PC_10, PB_8, PC_12, PC_11, PC_9, PC_8 ),
00061                             AntSwitch( A4 ), 
00062                             Fake( A3 )
00063                         #endif
00064 {
00065     this->RadioEvents = events;
00066 
00067     Reset( );
00068 
00069     boardConnected = UNKNOWN;
00070 
00071     DetectBoardType( );
00072 
00073     RxChainCalibration( );
00074 
00075     IoInit( );
00076 
00077     SetOpMode( RF_OPMODE_SLEEP );
00078     IoIrqInit( dioIrq );
00079 
00080     RadioRegistersInit( );
00081 
00082     SetModem( MODEM_FSK );
00083 
00084     this->settings.State = RF_IDLE ;
00085 }
00086 
00087 //-------------------------------------------------------------------------
00088 //                      Board relative functions
00089 //-------------------------------------------------------------------------
00090 uint8_t SX1276MB1xAS::DetectBoardType( void )
00091 {
00092     if( boardConnected == UNKNOWN )
00093     {
00094         this->AntSwitch .input( );
00095         wait_ms( 1 );
00096         if( this->AntSwitch  == 1 )
00097         {
00098             boardConnected = SX1276MB1LAS;
00099         }
00100         else
00101         {
00102             boardConnected = SX1276MB1MAS;
00103         }
00104         this->AntSwitch .output( );
00105         wait_ms( 1 );
00106     }
00107     return ( boardConnected );
00108 }
00109 
00110 void SX1276MB1xAS::IoInit( void )
00111 {
00112     AntSwInit( );
00113     SpiInit( );
00114 }
00115 
00116 void SX1276MB1xAS::RadioRegistersInit( )
00117 {
00118     uint8_t i = 0;
00119     for( i = 0; i < sizeof( RadioRegsInit ) / sizeof( RadioRegisters_t  ); i++ )
00120     {
00121         SetModem( RadioRegsInit[i].Modem );
00122         Write( RadioRegsInit[i].Addr, RadioRegsInit[i].Value );
00123     }    
00124 }
00125 
00126 void SX1276MB1xAS::SpiInit( void )
00127 {
00128     nss = 1;    
00129     spi .format( 8,0 );   
00130     uint32_t frequencyToSet = 8000000;
00131     #if( defined ( TARGET_NUCLEO_L152RE ) || defined ( TARGET_LPC11U6X ) )
00132         spi .frequency( frequencyToSet );
00133     #elif( defined ( TARGET_KL25Z ) ) //busclock frequency is halved -> double the spi frequency to compensate
00134         spi .frequency( frequencyToSet * 2 );
00135     #else
00136         #warning "Check the board's SPI frequency"
00137     #endif
00138     wait(0.1); 
00139 }
00140 
00141 void SX1276MB1xAS::IoIrqInit( DioIrqHandler *irqHandlers )
00142 {
00143 #if( defined ( TARGET_NUCLEO_L152RE ) || defined ( TARGET_LPC11U6X ) )
00144     dio0 .mode( PullDown );
00145     dio1.mode( PullDown );
00146     dio2.mode( PullDown );
00147     dio3.mode( PullDown );
00148     dio4.mode( PullDown );
00149 #endif
00150     dio0 .rise( mbed::callback( this, static_cast< TriggerMB1xAS > ( irqHandlers[0] ) ) );
00151     dio1.rise( mbed::callback( this, static_cast< TriggerMB1xAS > ( irqHandlers[1] ) ) );
00152     dio2.rise( mbed::callback( this, static_cast< TriggerMB1xAS > ( irqHandlers[2] ) ) );
00153     dio3.rise( mbed::callback( this, static_cast< TriggerMB1xAS > ( irqHandlers[3] ) ) );
00154     dio4.rise( mbed::callback( this, static_cast< TriggerMB1xAS > ( irqHandlers[4] ) ) );
00155 }
00156 
00157 void SX1276MB1xAS::IoDeInit( void )
00158 {
00159     //nothing
00160 }
00161 
00162 void SX1276MB1xAS::SetRfTxPower( int8_t power )
00163 {
00164     uint8_t paConfig = 0;
00165     uint8_t paDac = 0;
00166 
00167     paConfig = Read( REG_PACONFIG );
00168     paDac = Read( REG_PADAC );
00169 
00170     paConfig = ( paConfig & RF_PACONFIG_PASELECT_MASK ) | GetPaSelect( this->settings.Channel );
00171     paConfig = ( paConfig & RF_PACONFIG_MAX_POWER_MASK ) | 0x70;
00172 
00173     if( ( paConfig & RF_PACONFIG_PASELECT_PABOOST ) == RF_PACONFIG_PASELECT_PABOOST )
00174     {
00175         if( power > 17 )
00176         {
00177             paDac = ( paDac & RF_PADAC_20DBM_MASK ) | RF_PADAC_20DBM_ON;
00178         }
00179         else
00180         {
00181             paDac = ( paDac & RF_PADAC_20DBM_MASK ) | RF_PADAC_20DBM_OFF;
00182         }
00183         if( ( paDac & RF_PADAC_20DBM_ON ) == RF_PADAC_20DBM_ON )
00184         {
00185             if( power < 5 )
00186             {
00187                 power = 5;
00188             }
00189             if( power > 20 )
00190             {
00191                 power = 20;
00192             }
00193             paConfig = ( paConfig & RF_PACONFIG_OUTPUTPOWER_MASK ) | ( uint8_t )( ( uint16_t )( power - 5 ) & 0x0F );
00194         }
00195         else
00196         {
00197             if( power < 2 )
00198             {
00199                 power = 2;
00200             }
00201             if( power > 17 )
00202             {
00203                 power = 17;
00204             }
00205             paConfig = ( paConfig & RF_PACONFIG_OUTPUTPOWER_MASK ) | ( uint8_t )( ( uint16_t )( power - 2 ) & 0x0F );
00206         }
00207     }
00208     else
00209     {
00210         if( power < -1 )
00211         {
00212             power = -1;
00213         }
00214         if( power > 14 )
00215         {
00216             power = 14;
00217         }
00218         paConfig = ( paConfig & RF_PACONFIG_OUTPUTPOWER_MASK ) | ( uint8_t )( ( uint16_t )( power + 1 ) & 0x0F );
00219     }
00220     Write( REG_PACONFIG, paConfig );
00221     Write( REG_PADAC, paDac );
00222 }
00223 
00224 uint8_t SX1276MB1xAS::GetPaSelect( uint32_t channel )
00225 {
00226     if( channel > RF_MID_BAND_THRESH )
00227     {
00228         if( boardConnected == SX1276MB1LAS )
00229         {
00230             return RF_PACONFIG_PASELECT_PABOOST;
00231         }
00232         else
00233         {
00234             return RF_PACONFIG_PASELECT_RFO;
00235         }
00236     }
00237     else
00238     {
00239         return RF_PACONFIG_PASELECT_RFO;
00240     }
00241 }
00242 
00243 void SX1276MB1xAS::SetAntSwLowPower( bool status )
00244 {
00245     if( isRadioActive != status )
00246     {
00247         isRadioActive = status;
00248     
00249         if( status == false )
00250         {
00251             AntSwInit( );
00252         }
00253         else
00254         {
00255             AntSwDeInit( );
00256         }
00257     }
00258 }
00259 
00260 void SX1276MB1xAS::AntSwInit( void )
00261 {
00262     this->AntSwitch  = 0;
00263 }
00264 
00265 void SX1276MB1xAS::AntSwDeInit( void )
00266 {
00267     this->AntSwitch  = 0;
00268 }
00269 
00270 void SX1276MB1xAS::SetAntSw( uint8_t opMode )
00271 {
00272     switch( opMode )
00273     {
00274     case RFLR_OPMODE_TRANSMITTER:
00275         this->AntSwitch  = 1;
00276         break;
00277     case RFLR_OPMODE_RECEIVER:
00278     case RFLR_OPMODE_RECEIVER_SINGLE:
00279     case RFLR_OPMODE_CAD:
00280         this->AntSwitch  = 0;
00281         break;
00282     default:
00283         this->AntSwitch  = 0;
00284         break;
00285     }
00286 }
00287 
00288 bool SX1276MB1xAS::CheckRfFrequency( uint32_t frequency )
00289 {
00290     // Implement check. Currently all frequencies are supported
00291     return true;
00292 }
00293 
00294 void SX1276MB1xAS::Reset( void )
00295 {
00296     reset .output( );
00297     reset  = 0;
00298     wait_ms( 1 );
00299     reset .input( );
00300     wait_ms( 6 );
00301 }
00302 
00303 void SX1276MB1xAS::Write( uint8_t addr, uint8_t data )
00304 {
00305     Write( addr, &data, 1 );
00306 }
00307 
00308 uint8_t SX1276MB1xAS::Read( uint8_t addr )
00309 {
00310     uint8_t data;
00311     Read( addr, &data, 1 );
00312     return data;
00313 }
00314 
00315 void SX1276MB1xAS::Write( uint8_t addr, uint8_t *buffer, uint8_t size )
00316 {
00317     uint8_t i;
00318 
00319     nss = 0;
00320     spi .write( addr | 0x80 );
00321     for( i = 0; i < size; i++ )
00322     {
00323         spi .write( buffer[i] );
00324     }
00325     nss = 1;
00326 }
00327 
00328 void SX1276MB1xAS::Read( uint8_t addr, uint8_t *buffer, uint8_t size )
00329 {
00330     uint8_t i;
00331 
00332     nss = 0;
00333     spi .write( addr & 0x7F );
00334     for( i = 0; i < size; i++ )
00335     {
00336         buffer[i] = spi .write( 0 );
00337     }
00338     nss = 1;
00339 }
00340 
00341 void SX1276MB1xAS::WriteFifo( uint8_t *buffer, uint8_t size )
00342 {
00343     Write( 0, buffer, size );
00344 }
00345 
00346 void SX1276MB1xAS::ReadFifo( uint8_t *buffer, uint8_t size )
00347 {
00348     Read( 0, buffer, size );
00349 }