Sensors: TSL2591

TSL2591 library conversion

Procedure

1. Stared with Adafruit's Adafruit_TSL2591_Library

   https://github.com/adafruit/Adafruit_TSL2591_Library

2. Replaced the Adrino's reads and writes with call to the wiringPi library
3. Sanity checked the code against this JS program:

   https://github.com/bbx10/tsl2591-node/blob/master/tsl2591.js

4. Tested it and fixed a "bug".

Code

//http://www.raspberrypi.org/forums/viewtopic.php?t=67979&p=496252

// ALL COMMAND TSL2561 // Default I2C RPI address in (0x39) = FLOAT ADDR (Slave) Other [(0x49) = VCC ADDR / (0x29) = GROUND ADDR]

1. define TSL2561_ADDR_LOW (0x29)
2. define TSL2561_ADDR_FLOAT (0x39)
3. define TSL2561_ADDR_HIGH (0x49)

1. include "2591a.h"
2. include <unistd.h>

int main(){

   Adafruit_TSL2591 tsl = Adafruit_TSL2591(2591); // pass in a number for the sensor identifier (for your use later)

   int fd = 0;
   fd = wiringPiI2CSetup(0x29);
   uint16_t ch0,ch1;
   uint32_t visible_and_ir, lux;

   visible_and_ir = tsl.Adafruit_TSL2591::getFullLuminosity (fd);
   sleep(1);
   visible_and_ir = tsl.Adafruit_TSL2591::getFullLuminosity (fd);

   // Reads two byte value from channel 0 (visible + infrared)
   ch0 =  (visible_and_ir & 0xFFFF);
   // Reads two byte value from channel 1 (infrared)
   ch1 = (visible_and_ir >> 16);

   lux = tsl.Adafruit_TSL2591::calculateLux(ch0, ch1);

   printf("TSL2591 Full Spectrum: %zu\n",ch0);
   printf("TSL2591 Infrared: %zu\n",ch1);
   if ( ch0 >= ch1 )  printf("TSL2591 Visible: %zu\n",ch0-ch1);
   printf("TSL2591 Lux: %zu\n", lux);

}

/* NOTE: To compile programs with wiringPi, you need to add:

   -lwiringPi
 to your compile line(s) To use the Gertboard, MaxDetect, etc.
 code (the devLib), you need to also add:
   -lwiringPiDev
 to your compile line(s).

gcc 2591_pi_2.cpp 2591a.cpp -lwiringPi -o 2591

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