AMS TCS3701 Manuale utente

User Guide

UG000418

TCS3701

ALS/Color and Proximity Sensor for Use Behind

OLED Displays Evaluation Kit

TCS3701 EVM

v1-00 •2019-Jan-11

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TCS3701

Content Guide

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Content Guide

1Introduction....................................3

1.1 Kit Content.................................................... 3

1.2 Ordering Information .................................... 4

2Getting Started...............................5

3Hardware Description....................6

4Software Description.....................7

4.1 Connect Software to Hardware.................... 7

4.2 System Menus.............................................. 8

4.3 System Level Controls ...............................10

4.4 Automatic Polling........................................10

4.5 Device ID Information ................................ 11

4.6 Log Status and Control Information........... 11

4.7 “ALS” Tab................................................... 12

4.8 “Prox” Tab .................................................. 15

5Resources.................................... 19

6Revision Information................... 20

7Legal Information ........................ 21

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Introduction

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1 Introduction

The TCS3701 evaluation kit comes with everything needed to evaluate the TCS3701 . The device

features ambient light and color (RGB) sensing in parallel with proximity detection.

1.1 Kit Content

Figure 1 :

Evaluation Kit Contents

No.

Item

Description

TCS3701 Daughter Card

PCB with TCS3701 sensor installed

EVM Controller Board

Used to communicate USB to I2C

USB Cable (A to Mini B)

Connects EVM controller to PC

Flash Drive

Includes application installer and documents

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Introduction

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1.2 Ordering Information

Ordering Code

Description

TCS3701 EVM

TCS3701 ALS/Color and Proximity Sensor for Use Behind

OLED Displays Evaluation Kit

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Getting Started

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2 Getting Started

The software should be installed prior to connecting any hardware to the computer. Follow the

instructions found in the Quick Start Guide (QSG). This loads the required driver for the USB interface

and also the device’s graphical user interface (GUI).

The balance of this document identifies and describes the controls available on the GUI. In

combination with the TCS3701 datasheet, the QSG and application notes available on the ams

website, there should be enough information to allow evaluation of the TCS3701 device.

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Hardware Description

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3 Hardware Description

The hardware consists of the EVM Controller, the TCS3701 EVM daughter card, and a USB interface

cable. The EVM controller board provides power and I2C communication to the daughter card through

a seven pin connector. When the EVM controller is connected to the PC through USB, a green LED

on the board flashes once on power up to indicate the system is getting power.

For schematics, layout and BOM information, please see the documents included with the install

located in the TCS3701 EVM folder (All Programs -> ams -> TCS3701 EVM > Documents).

Figure 2 :

Evaluation Kit Hardware

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Software Description

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4 Software Description

The main window (Figure 3) contains the system menus, system level controls, device information and

logging status. The ALS tab contains controls for the light sensing function. The Prox tab contains

settings for the proximity function. The application polls the ALS and proximity raw data continuously

and calculates the Lux, CCT, and prox standard deviation values.

Figure 3 :

Graphical User Interface (GUI) Main Window

4.1 Connect Software to Hardware

On startup, the software automatically connects to the hardware. On successful initialization, the

software displays a main window, containing controls pertinent to the connected device. If the software

detects an error, an error window appears. If “Device not found or is unsupported” appears, verify the

correct daughterboard is properly connected to the EVM controller board. If “Cannot connect to EVM

board” appears, verify the USB cable is connected. When the EVM controller board is connected to

the USB, a green LED on the board flashes once on power up to indicate the USB cable is connected

and providing power to the system.

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If the EVM board is disconnected from the USB bus while the program is running it displays an error

message and then terminates. Reconnect the EVM board and restart the program.

4.2 System Menus

At the top of the window there are pull-down menus labeled “File”, “Log”, and “Help”. The File menu

provides basic application-level control. The Log menu is used to control the logging function, and the

Help menu provides version and copyright information for the application.

4.2.1 File Menu

The File menu contains the following functions:

Figure 4 :

File Menu

The Reread Registers function forces the program to re-read all of the control registers from the

device and display them on the screen. This does not read the output data, because those registers

are continually read while the program is running.

The Lux Coefficients menu allows the user to Display, Load or Save the lux coefficients used to

calculate lux. See the ALS Lux Coefficients section for more details.

Click on the Exit command to close the main window and terminate the application. Any unsaved log

data is cleared from memory. The application can also be close by clicking the red “X” in the upper

right hand corner.

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4.2.2 Log Menu

The Log menu is used to control the logging function and to save the log data to a file. Log data is

accumulated in memory until it is discarded or written to a data file.

Figure 5 :

Log Menu

Click Start Logging to start the logging function. Each time the program polls the output information

from the device, it creates a new log entry showing the raw data values, the values of various control

registers, and the values entered by the user into the text fields near the bottom right corner of the

window.

Click Stop Logging to stop the logging function. Once logging is stopped, the data can be written to a

file, or the user can continue collecting additional data by clicking Start Logging again.

The Log a Single Entry command causes logging to start, collect one single entry, and immediately

stop again. This function is not available when logging is already running.

Click Clear Log to discard any data that has already been collected. If there is data in memory, which

has not been saved to disk, this function displays a prompt asking to verify it is OK to discard the data.

If the log is running when this function is clicked, the log continues running after the existing data is

discarded.

Click Save Log to save the collected log data to a csv file. This stops the logging function, if it is

active, and displays a file dialog box to specify where to store the logged data. The default file name

is described in the Log Status and Control Information section, but the file name may be changed if

desired.

4.2.3 Help Menu

The Help menu contains a single function: About.

Figure 6 :

Help Menu

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The About function displays a dialog box (Figure 7) showing the version and copyright information for

the application and library. Click the OK button to close this window and continue.

Figure 7 :

About Window

4.3 System Level Controls

Immediately below the top menu bar there are checkboxes used to control the system level functions

of the TCS3701 device.

The Power On checkbox controls the PON function of the TCS3701 . When this box is checked, the

power is on and the device can operate. When this box is unchecked, the power is off and the device

does not operate (The control registers can still be written, but the device does not function).

The ALS Enable checkbox controls the AEN function of the TCS3701. When this box is checked, the

device collects and report ALS data as programmed. When this box is unchecked, the ALS functions

do not operate.

The Prox Enable checkbox controls the PEN function of the TCS3701. Proximity detection is enabled

when this box is checked or disabled when unchecked.

4.4 Automatic Polling

The application automatically polls the TCS3701 raw data of ALS and Prox if enabled. The Poll

Interval displays the time between reads of the device.

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