tsl45315.cpp

00001 
00002 #include "tsl45315.hpp"
00003 
00004 namespace TSL45x
00005 {
00006 
00007 TSL45315::TSL45315( PinName p_sda, PinName p_scl, int i2c_freq, float t ): _i2c( p_sda, p_scl )
00008 {
00009     _i2c.frequency( i2c_freq );
00010     getIDdata();
00011     setReg( CONTROL_REG, NORMAL_OP);
00012     setReg( CONFIG_REG, M1);
00013     setMultiplier( M1 );
00014     _luxTicker.attach( this, &TSL45315::getLuxData, t );
00015 }
00016 
00017 TSL45315::TSL45315( PinName p_sda, PinName p_scl, int i2c_freq, float t, uint8_t mult ): _i2c( p_sda, p_scl )
00018 {
00019     _i2c.frequency( i2c_freq );
00020     getIDdata( );
00021     setReg( CONTROL_REG, NORMAL_OP );
00022     setReg( CONFIG_REG, mult );
00023     setMultiplier( mult );
00024     _luxTicker.attach( this, &TSL45315::getLuxData, t );
00025 }
00026 
00027 TSL45315::TSL45315( PinName p_sda, PinName p_scl, uint8_t mult ): _i2c( p_sda, p_scl )
00028 {
00029     _i2c.frequency( I2C_FREQ );
00030     getIDdata( );
00031     setReg( CONTROL_REG, NORMAL_OP );
00032     setReg( CONFIG_REG, mult );
00033     setMultiplier( mult );
00034 }
00035 
00036 TSL45315::TSL45315( PinName p_sda, PinName p_scl): _i2c( p_sda, p_scl )
00037 {
00038     _i2c.frequency( I2C_FREQ );
00039     getIDdata( );
00040     setReg( CONTROL_REG, NORMAL_OP );
00041     setReg( CONFIG_REG, M1 );
00042     setMultiplier( M1 );
00043 }
00044 
00045 void TSL45315::setMultiplier( uint8_t mult )
00046 {
00047     switch( mult ) {
00048         case 0:
00049             multiplier = 1;
00050             break;
00051         case 1:
00052             multiplier = 2;
00053             break;
00054         case 2:
00055             multiplier = 4;
00056             break;
00057         default:
00058             multiplier = 0;
00059             break;
00060     }
00061 }
00062 
00063 void TSL45315::setReg( int reg, int arg )
00064 {
00065     char cmd[2];
00066     cmd[0] = ( 0x80|reg );
00067     cmd[1] =  arg;
00068     _i2c.write( I2C_ADDR, cmd, 2 );
00069 }
00070 
00071 
00072 void TSL45315::getIDdata( )
00073 {
00074     char id[1];
00075     id[0]= 0;
00076 
00077     char cmd[1];
00078     cmd[0] = (0x80|ID_REG);
00079     _i2c.write(I2C_ADDR, cmd, 1);
00080     _i2c.read(I2C_ADDR, id, 1);
00081 
00082     devID = ( id[0]&0xF0 );   
00083 }
00084 
00085 void TSL45315::getLuxData( )
00086 {
00087     char data[2];
00088     char cmd[1];
00089     cmd[0] = (0x80|DATALOW_REG);
00090     _i2c.write(I2C_ADDR, cmd, 1);
00091     _i2c.read(I2C_ADDR, data, 2);
00092     lux =uint32_t( (data[1]<<8)|data[0] );
00093     lux *= multiplier;
00094 }
00095 }