board.cpp

00001 /*
00002  / _____)             _              | |
00003 ( (____  _____ ____ _| |_ _____  ____| |__
00004  \____ \| ___ |    (_   _) ___ |/ ___)  _ \
00005  _____) ) ____| | | || |_| ____( (___| | | |
00006 (______/|_____)_|_|_| \__)_____)\____)_| |_|
00007     (C)2015 Semtech
00008 
00009 Description: Target board general functions implementation
00010 
00011 License: Revised BSD License, see LICENSE.TXT file include in the project
00012 
00013 Maintainer: Miguel Luis and Gregory Cristian
00014 */
00015 #include "mbed.h"
00016 #include "board.h"
00017 
00018 /*!
00019  * Unique Devices IDs register set ( STM32 )
00020  */
00021 #define         ID1                                 ( 0x1FF800D0 )
00022 #define         ID2                                 ( 0x1FF800D4 )
00023 #define         ID3                                 ( 0x1FF800E4 )
00024 
00025 DigitalOut RedLed( PB_1 );     // Active Low
00026 DigitalOut YellowLed( PB_10 ); // Active Low
00027 DigitalOut GreenLed( PC_3 );   // Active Low
00028 DigitalOut UsrLed( PA_5 );     // Active High
00029 
00030 
00031 GPS Gps( PB_6, PB_7, PB_11 ); // Gps(tx, rx, en);
00032 
00033 DigitalIn I2cInterrupt( PB_4 );
00034 I2C I2c(I2C_SDA, I2C_SCL);
00035 
00036 MPL3115A2 Mpl3115a2( I2c, I2cInterrupt );
00037 MMA8451Q Mma8451q(I2c, I2cInterrupt);
00038 
00039 DigitalOut Pc7( PC_7 );
00040 DigitalIn Pc1( PC_1 );
00041 
00042 // Used for Push button application demo
00043 DigitalIn PC0( PC_0, PullUp ); 
00044 
00045 AnalogIn *Battery;
00046 
00047 #define AIN_VREF            3300    // STM32 internal refernce
00048 #define AIN_VBAT_DIV        2       // Resistor divider
00049 
00050 SX1272MB2xAS Radio( NULL );
00051 
00052 /*!
00053  * Nested interrupt counter.
00054  *
00055  * \remark Interrupt should only be fully disabled once the value is 0
00056  */
00057 static uint8_t IrqNestLevel = 0;
00058 
00059 void BoardDisableIrq( void )
00060 {
00061     __disable_irq( );
00062     IrqNestLevel++;
00063 }
00064 
00065 void BoardEnableIrq( void )
00066 {
00067     IrqNestLevel--;
00068     if( IrqNestLevel == 0 )
00069     {
00070         __enable_irq( );
00071     }
00072 }
00073 
00074 void BoardInit( void )
00075 {
00076     // Initalize LEDs
00077     RedLed = 1;     // Active Low
00078     GreenLed = 1;   // Active Low
00079     YellowLed = 1;  // Active Low
00080     UsrLed = 0;     // Active High
00081 
00082     TimerTimeCounterInit( );
00083 
00084     switch( BoardGetVersion( ) )
00085     {
00086         case BOARD_VERSION_2:
00087             Battery = new AnalogIn( PA_0 );
00088             Gps.en_invert = true;
00089             break;
00090         case BOARD_VERSION_3:
00091             Battery = new AnalogIn( PA_1 );
00092             Gps.en_invert = false;
00093             break;
00094         default:
00095             break;
00096     }
00097     Gps.init( );
00098     Gps.enable( 1 );
00099 
00100     Mpl3115a2.init( );
00101     Mma8451q.orient_detect( );
00102 }
00103 
00104 
00105 uint8_t BoardGetBatteryLevel( void ) 
00106 {
00107     // Per LoRaWAN spec; 0 = Charging; 1...254 = level, 255 = N/A
00108     return ( Battery->read_u16( ) >> 8 ) + ( Battery->read_u16( ) >> 9 );
00109 }
00110 
00111 uint32_t BoardGetBatteryVoltage( void ) 
00112 {
00113     return ( Battery->read( ) * AIN_VREF * AIN_VBAT_DIV );
00114 }
00115 
00116 uint32_t BoardGetRandomSeed( void )
00117 {
00118     return ( ( *( uint32_t* )ID1 ) ^ ( *( uint32_t* )ID2 ) ^ ( *( uint32_t* )ID3 ) );
00119 }
00120 
00121 void BoardGetDevEUI( uint8_t *id )
00122 {
00123     uint32_t *pDevEuiHWord = ( uint32_t* )&id[4];
00124 
00125     if( *pDevEuiHWord == 0 )
00126     {        
00127         *pDevEuiHWord = BoardGetRandomSeed( );
00128     }
00129     
00130 }
00131 
00132 void BoardGetUniqueId( uint8_t *id )
00133 {
00134     id[7] = ( ( *( uint32_t* )ID1 )+ ( *( uint32_t* )ID3 ) ) >> 24;
00135     id[6] = ( ( *( uint32_t* )ID1 )+ ( *( uint32_t* )ID3 ) ) >> 16;
00136     id[5] = ( ( *( uint32_t* )ID1 )+ ( *( uint32_t* )ID3 ) ) >> 8;
00137     id[4] = ( ( *( uint32_t* )ID1 )+ ( *( uint32_t* )ID3 ) );
00138     id[3] = ( ( *( uint32_t* )ID2 ) ) >> 24;
00139     id[2] = ( ( *( uint32_t* )ID2 ) ) >> 16;
00140     id[1] = ( ( *( uint32_t* )ID2 ) ) >> 8;
00141     id[0] = ( ( *( uint32_t* )ID2 ) );
00142 }
00143 
00144 BoardVersion_t BoardGetVersion( void )
00145 {
00146     Pc7 = 1;
00147     char first = Pc1;
00148     Pc7 = 0;
00149     
00150     if( first && !Pc1 )
00151     {
00152         return BOARD_VERSION_2;
00153     }
00154     else
00155     {
00156         return BOARD_VERSION_3;
00157     }
00158 }