File content as of revision 4:8146a28a20cc:

#include "TSL2561.h"
#include "mbed.h"
TSL2561::TSL2561():i2c(TSL2561_I2C_PINNAME_SDA,TSL2561_I2C_PINNAME_SCL){
    i2c.frequency (300);
    _addr = TSL2561_ADDR_FLOAT;
    _initialized = false;
    _integration = TSL2561_INTEGRATIONTIME_13MS;
    _gain = TSL2561_GAIN_16X;
}
TSL2561::TSL2561(uint8_t addr):i2c(TSL2561_I2C_PINNAME_SDA,TSL2561_I2C_PINNAME_SCL) {
  _addr = addr;
  _initialized = false;
  _integration = TSL2561_INTEGRATIONTIME_13MS;
  _gain = TSL2561_GAIN_16X;
  // we cant do wire initialization till later, because we havent loaded Wire yet
}
TSL2561::TSL2561(PinName sda, PinName scl):i2c(sda, scl) {
  _addr = TSL2561_ADDR_FLOAT;
  _initialized = false;
  _integration = TSL2561_INTEGRATIONTIME_13MS;
  _gain = TSL2561_GAIN_16X;
  // we cant do wire initialization till later, because we havent loaded Wire yet
}
TSL2561::TSL2561(PinName sda, PinName scl, uint8_t addr):i2c(sda, scl) {
  _addr = addr;
  _initialized = false;
  _integration = TSL2561_INTEGRATIONTIME_13MS;
  _gain = TSL2561_GAIN_16X;
  // we cant do wire initialization till later, because we havent loaded Wire yet
}
uint16_t TSL2561::getLuminosity (uint8_t channel) {
  uint32_t x = getFullLuminosity();
  if (channel == 0) {
    // Reads two byte value from channel 0 (visible + infrared)
    return (x & 0xFFFF);
  } else if (channel == 1) {
    // Reads two byte value from channel 1 (infrared)
    return (x >> 16);
  } else if (channel == 2) {
    // Reads all and subtracts out just the visible!
    return ( (x & 0xFFFF) - (x >> 16) );
  }
  // unknown channel!
  return 0;
}
uint32_t TSL2561::getFullLuminosity (void)
{
  if (!_initialized) begin();
  // Enable the device by setting the control bit to 0x03
  enable();
  // Wait x ms for ADC to complete
  switch (_integration)
  {
    case TSL2561_INTEGRATIONTIME_13MS:
      wait_ms(14);
      break;
    case TSL2561_INTEGRATIONTIME_101MS:
      wait_ms(102);
      break;
    default:
      wait_ms(450);
      break;
  }
  uint32_t x;
  x = read16(TSL2561_COMMAND_BIT | TSL2561_WORD_BIT | TSL2561_REGISTER_CHAN1_LOW);
  x <<= 16;
  x |= read16(TSL2561_COMMAND_BIT | TSL2561_WORD_BIT | TSL2561_REGISTER_CHAN0_LOW);
    //wait(3);
  disable();
  return x;
}
bool TSL2561::begin(void) {
    char  reg[1];
    reg[0] = TSL2561_REGISTER_ID;
    char receivedata[1];
    char read;
    i2c.write(_addr<<1, reg, 1);
    i2c.read(_addr<<1, receivedata, 1);
    read=receivedata[0];
  if (read & 0x0A ) {
  } else {
    return false;
  }
    _initialized = true;
    // Set default integration time and gain
    setTiming(_integration);
    setGain(_gain);
    // Note: by default, the device is in power down mode on bootup
    disable();
    return true;
 }
 uint16_t TSL2561::read16(uint8_t reg)
{
    uint16_t x;
    uint16_t t;
    char _x;
    char _t;
    char r[1];
    r[0] = reg;
    char receivedata[2];
    i2c.write(_addr<<1, r, 1);
    i2c.read(_addr<<1, receivedata, 2);
    _t=receivedata[0];
    _x=receivedata[1];
    t=(uint16_t)_t;
    x=(uint16_t)_x;
    x <<= 8;
    x |= t;
    return x;
}
 void TSL2561::write8 (uint8_t reg, uint8_t value)
{
    i2c.start();
    i2c.write(_addr<<1);
    i2c.write(reg);
    i2c.write(value);
    i2c.stop();
}
void TSL2561::setTiming(tsl2561IntegrationTime_t integration){
if (!_initialized) begin();
  enable();
  _integration = integration;
  write8(TSL2561_COMMAND_BIT | TSL2561_REGISTER_TIMING, _integration | _gain);
  disable();
  //wait(1);
}
void TSL2561::setGain(tsl2561Gain_t gain) {
if (!_initialized) begin();
  enable();
  _gain = gain;
  write8(TSL2561_COMMAND_BIT | TSL2561_REGISTER_TIMING, _integration | _gain);
  //write8(TSL2561_COMMAND_BIT | TSL2561_REGISTER_TIMING,  _gain);
  disable();
  //wait(1);
}
void TSL2561::enable(void)
{
  if (!_initialized) begin();
  // Enable the device by setting the control bit to 0x03
  write8(TSL2561_COMMAND_BIT | TSL2561_REGISTER_CONTROL, TSL2561_CONTROL_POWERON);
}
void TSL2561::disable(void)
{
  if (!_initialized) begin();
  // Disable the device by setting the control bit to 0x03
  write8(TSL2561_COMMAND_BIT | TSL2561_REGISTER_CONTROL, TSL2561_CONTROL_POWEROFF);
}