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diff --git a/peripheral/libupm/src/tsl2561/tsl2561.cxx b/peripheral/libupm/src/tsl2561/tsl2561.cxx
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-/*
- * Author: Nandkishor Sonar <Nandkishor.Sonar@intel.com>
- * Copyright (c) 2014 Intel Corporation.
- *
- * LIGHT-TO-DIGITAL CONVERTER [TAOS-TSL2561]
- * Inspiration and lux calculation formulas from data sheet
- * URL: http://www.adafruit.com/datasheets/TSL2561.pdf
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sublicense, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
- * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
- * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-
-#include <string>
-#include <stdexcept>
-#include <unistd.h>
-#include "tsl2561.h"
-
-using namespace upm;
-
-
-TSL2561::TSL2561(int bus, uint8_t devAddr, uint8_t gain, uint8_t integrationTime)
- : m_i2ControlCtx(bus)
-{
- m_controlAddr = devAddr;
- m_bus = bus;
- m_gain = gain ;
- m_integrationTime = integrationTime;
-
- m_name = "TSL2561- Digital Light Sensor";
-
- mraa::Result error = m_i2ControlCtx.address(m_controlAddr);
- if (error != mraa::SUCCESS) {
- throw std::invalid_argument(std::string(__FUNCTION__) +
- ": mraa_i2c_address() failed");
- return;
- }
-
- // POWER UP.
- error = m_i2ControlCtx.writeReg(REGISTER_Control, CONTROL_POWERON);
- if (error != mraa::SUCCESS) {
- throw std::runtime_error(std::string(__FUNCTION__) +
- ": Unable to power up TSL2561");
- return;
- }
- // Power on Settling time
- usleep(1000);
-
- // Gain & Integration time .
- error = m_i2ControlCtx.writeReg(REGISTER_Timing, m_gain | m_integrationTime);
- if (error != mraa::SUCCESS) {
- throw std::runtime_error(std::string(__FUNCTION__) +
- ": Unable to set gain/time");
- return;
- }
-
- // Set interrupt threshold to default.
- error = m_i2ControlCtx.writeReg(REGISTER_Interrupt, 0x00);
- if (error != mraa::SUCCESS) {
- throw std::runtime_error(std::string(__FUNCTION__) +
- ": Unable to set interrupt threshold");
- return;
- }
-}
-
-TSL2561::~TSL2561()
-{
- // POWER DOWN
- m_i2ControlCtx.writeReg(REGISTER_Control, CONTROL_POWEROFF);
-}
-
-int
-TSL2561::getLux()
-{
- mraa::Result error = mraa::SUCCESS;
- int lux;
- uint16_t rawLuxCh0;
- uint16_t rawLuxCh1;
- uint8_t ch0_low, ch0_high, ch1_low, ch1_high;
-
- error = i2cReadReg(REGISTER_Channal0L, ch0_low);
- if (error != mraa::SUCCESS) {
- fprintf(stderr, "Error: Unable to read channel0L in getRawLux()\n");
- return error;
- }
-
- error = i2cReadReg(REGISTER_Channal0H, ch0_high);
- if (error != mraa::SUCCESS) {
- fprintf(stderr, "Error: Unable to read channel0H in getRawLux()\n");
- return error;
- }
-
- rawLuxCh0 = ch0_high*256+ch0_low;
-
- error= i2cReadReg(REGISTER_Channal1L, ch1_low);
- if (error != mraa::SUCCESS) {
- fprintf(stderr, "Error: Unable to read channel1L in getRawLux()\n");
- return error;
- }
-
- error = i2cReadReg(REGISTER_Channal1H, ch1_high);
- if (error != mraa::SUCCESS) {
- fprintf(stderr, "Error: Unable to read channel1H in getRawLux()\n");
- return error;
- }
-
- rawLuxCh1 = ch1_high*256+ch1_low;
-
- uint64_t scale = 0;
-
- switch (m_integrationTime)
- {
- case 0: // 13.7 msec
- scale = LUX_CHSCALE_TINT0;
- break;
- case 1: // 101 msec
- scale = LUX_CHSCALE_TINT1;
- break;
- default: // assume no scaling
- scale = (1 << LUX_CHSCALE);
- break;
- }
-
- // scale if gain is NOT 16X
- if (!m_gain) scale = scale << 4;
-
- uint64_t channel1 = 0;
- uint64_t channel0 = 0;
- // scale the channel values
- channel0 = (rawLuxCh0 * scale) >> LUX_CHSCALE;
- channel1 = (rawLuxCh1 * scale) >> LUX_CHSCALE;
-
- // find the ratio of the channel values (Channel1/Channel0)
- // protect against divide by zero
- unsigned long ratio1 = 0;
- if (channel0 != 0) ratio1 = (channel1 << (LUX_RATIOSCALE+1)) / channel0;
-
- // round the ratio value
- unsigned long ratio = (ratio1 + 1) >> 1;
-
- unsigned int b, m;
-
- // CS package
- // Check if ratio <= eachBreak ?
- if ((ratio >= 0) && (ratio <= LUX_K1C))
- {b=LUX_B1C; m=LUX_M1C;}
- else if (ratio <= LUX_K2C)
- {b=LUX_B2C; m=LUX_M2C;}
- else if (ratio <= LUX_K3C)
- {b=LUX_B3C; m=LUX_M3C;}
- else if (ratio <= LUX_K4C)
- {b=LUX_B4C; m=LUX_M4C;}
- else if (ratio <= LUX_K5C)
- {b=LUX_B5C; m=LUX_M5C;}
- else if (ratio <= LUX_K6C)
- {b=LUX_B6C; m=LUX_M6C;}
- else if (ratio <= LUX_K7C)
- {b=LUX_B7C; m=LUX_M7C;}
- else if (ratio > LUX_K8C)
- {b=LUX_B8C; m=LUX_M8C;}
-
- uint64_t tempLux = 0;
- tempLux = ((channel0 * b) - (channel1 * m));
- // do not allow negative lux value
- if (tempLux < 0) tempLux = 0;
-
- // round lsb (2^(LUX_SCALE-1))
- tempLux += (1 << (LUX_SCALE-1));
-
- // strip off fractional portion
- lux = tempLux >> LUX_SCALE;
-
- return lux;
-}
-
-
-mraa::Result
-TSL2561::i2cWriteReg (uint8_t reg, uint8_t value)
-{
- mraa::Result error = mraa::SUCCESS;
-
- // Start transmission to device
- error = m_i2ControlCtx.address (m_controlAddr);
- if (error != mraa::SUCCESS) {
- fprintf(stderr, "Error: on i2c bus address setup in i2cWriteReg()\n");
- return error;
- }
- // Write register to I2C
- error = m_i2ControlCtx.writeByte (reg);
- if (error != mraa::SUCCESS) {
- fprintf(stderr, "Error: on i2c bus write reg in i2cWriteReg()\n");
- return error;
- }
-
- // Write value to I2C
- error = m_i2ControlCtx.writeByte (value);
- if (error != mraa::SUCCESS) {
- fprintf(stderr, "Error: on i2c bus write value in i2cWriteReg()\n");
- return error;
- }
-
- usleep(100000);
-
- return error;
-}
-
-mraa::Result
-TSL2561::i2cReadReg(uint8_t reg, uint8_t &data)
-{
- mraa::Result error = mraa::SUCCESS;
-
- // Start transmission to device
- error = m_i2ControlCtx.address(m_controlAddr);
- if (error != mraa::SUCCESS) {
- fprintf(stderr, "Error: on i2c bus address setup in i2cReadReg()\n");
- return error;
- }
-
- // Send address of register to be read.
- error = m_i2ControlCtx.writeByte(reg);
- if (error != mraa::SUCCESS) {
- fprintf(stderr, "Error: on i2c bus write in i2cReadReg()\n");
- return error;
- }
-
- // Read byte.
- data = m_i2ControlCtx.readByte();
-
- usleep(10000);
-
- return error;
-}