Philips PC-Link User Manual

Page 1

USB Smart I/O

Trademarks & Copyright

I2C is a Registered Trademark of Philips Semiconductors. AT, IBM, and PC are trademarks of International Business Machines Corporation. Pentium is a registered trademark of Intel Corporation. Windows is a registered trademark of Microsoft Corporation. HyperTerminal is copyright by Microsoft Corporation and Hilgraeve Inc. Borland Delphi is copyright by Borland Software Corporation.

Page 2

Table of Contents

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

1.1 Specification................................................................................................ 3

1.2 Suggested system....................................................................................... 3

2 Hardware.................................................................................................. 4

2.1 Component Layout..................................................................................... 4

2.2 Connector and Jumper Settings............................................................... 4

3 Interface.................................................................................................... 7

3.1 UART Interface............................................................................................ 7

3.2 Command Set.............................................................................................. 8

3.2.1. Ping............................................................................................................... 8

3.2.2. Reset............................................................................................................. 8

3.2.3. Set Function................................................................................................. 9

3.2.4. Get Function................................................................................................ 9

3.2.5. Get Port....................................................................................................... 10

3.2.6. Set Bit........................................................................................................... 10

3.2.7. Get Bit.......................................................................................................... 11

3.2.8. Set Byte........................................................................................................ 11

3.2.9. Get Byte...................................................................................................... 12

3.2.10. Get ADC...................................................................................................... 12

3.2.11. Set Bit Rate.................................................................................................. 12

3.2.12. Get Bit Rate................................................................................................ 13

3.2.13. I2C Start....................................................................................................... 13

3.2.14. I2C Write..................................................................................................... 13

3.2.15. I2C Read...................................................................................................... 14

3.2.16. I2C Stop....................................................................................................... 14

3.2.17. I2C Send Packet......................................................................................... 14

3.2.18. I2C Get Packet........................................................................................... 15

3.2.19. Set Baud Rate............................................................................................. 15

3.2.20. Get Baud Rate............................................................................................ 16

3.2.21. Send UART................................................................................................... 16

3.2.22. Get UART..................................................................................................... 16

3.2.23. Send DAC.................................................................................................... 17

3.2.24. Stop Counter............................................................................................... 17

3.2.25. Start Counter............................................................................................... 18

3.2.26. Get Counter................................................................................................ 18

3.2.27. Get Version................................................................................................. 18

4 Testing Procedure..................................................................................... 19

5 Program Example..................................................................................... 20

Attachment

A. PC-LINK USB SMART I/O Schematics.................................................... 23

Page 3

1. INTRODUCTION

PC-LINK USB SMART I/O is a USB device that functions as controller of multiple input/output lines and interfaces. Examples of PC-LINK USB SMART I/O applications are as a relay/LED controller, reading analog signals from sensor, as a switch condition reader, calculate pulse counter, communications with modules via UART Interface, communications with sensors/RTC/EEPROM via I2C® interface, etc.

1.1. SPECIFICATION

PC-LINK USB SMART I/O specification are as follows:

• Connection to host (computer) uses USB interface which will be recognized

as COM Port (virtual) with 8-n-1 parameters (8 bit data, 1 stop bit, without parity) and Auto Baud Rate feature (baud rate range: 110-256000 bps).

• There are 8 analog pins that can be utilized as analog inputs (Analog to

Digital Converter), digital outputs, or digital inputs (with or without internal pull up resistors).

• There are 8 digital pins that can be utilized as digital outputs or digital

inputs (with or without internal pull up resistors).

• There are 5 general purpose pins that can be utilized as digital outputs or

digital inputs (with or without internal pull up resistors).

• Equipped with an 8-bit DAC (Digital to Analog Converter) with rail-to-rail

capabilities (0 – ±5.1 VDC).

• Equipped with I

C interface with bit rate between 30 - 400 kHz (default is

50 kHz). Module acts as master.

• I

C send buffer is 35 bytes and receive buffer is 32 bytes.

• Equipped with 8-n-1 UART interface with voltage level selection: TTL (half-

duplex), RS232 (half-duplex), or RS485 (half-duplex), and baud rate selection: 9600, 19200, 38400, or 57600 bps.

• UART send and receive buffers are 32 bytes each.

• Requires a 6,5 – 12 VDC power supply.

• Voltage regulator with ±5,1 VDC output and a maximum current of 800mA

(some are allocated for internal components).

1.2. SUGGESTED SYSTEM

Suggested system for PC-LINK USB SMART I/O: Hardware:

• PC

™

AT™ Pentium® IBM™ Compatible with USB port.

• DVD-ROM Drive and Hard disk.

Software:

• Windows

XP Operating System.

• Borland Delphi

or other programming that can access the COM port.

• Files in the CD/DVD:

smart_io_driver.inf, SmartIO.exe + source (Delphi 7), datasheet, and PCLINK USB SMART IO MANUAL.

Page 4

DC Jack Polarity

2. HARDWARE

2.1. COMPONENT LAYOUT

2.2. CONNECTOR AND JUMPER SETTINGS

J2 DC Jack and J1 blue terminal are connectors for power supply input, whilst J12 blue terminal functions as voltage output from regulator.

Pin Name Function

1 GND Ground reference for power supply input 2 6.5-12VDC Connected to power supply input (6.5-12 volt)

J12

Pin Name Function

1 GND Ground reference for power supply output 2 5VDC Voltage output from regulator (±5.1 Volt)

Page 5

SDA SCL

SDA-SCL (J19) jumpers are used to activate the pull up resistors for SDA and SCL pins of the I2C interface.

SDA-SCL jumper

J19

Function

Pull-up inactive

(jumper released)

Pull-up active

(jumper attached)

Important !

If more than one module are connected to I2C-bus, then only the SDA-SCL jumpers of one of the modules need to be attached.

RS232 (J8) blue terminal is a connector for RS232 UART interface, TTL (J6) blue terminal is a connector for TTL UART interface, while RS485 (J15) blue terminal is a connector for RS485 UART interface.

J8 (RS232)

Pin Name Function

1 GND Ground reference 2 TX UART (RS232) output line from the module 3 RX UART (RS232) input line to the module

J6 (TTL)

Pin Name Function

1 GND Ground reference 2 TX UART (TTL) output line from the module 3 RX UART (TTL) input line to the module

J15

Pin Name Function

1 GND Ground reference 2 D- Data line (inverting –) 3 D+ Data line (non-inverting +)

Page 6

J17 J18 3 2 1

16 14 13

J17 J18 3 2 1

16 14 13

J17 and J18 jumpers are used to select UART communication line.

UART RS232 UART RS485 UART TTL

Jumper on

position 1 – 2

Jumper on

position 2 – 3

Jumper

released

J13, J14, and J16 jumpers are used as bias-, termination, and bias +. Usually, in one RS485 line, there's only 1 pair of bias - and bias +, while terminations are only placed in the outermost modules.

Condition Examples Jumper Configuration Examples

If module is at the end of line and the network doesn't have bias +/–

If module is at the end of line and there is bias +/- on the network

If module is not at the end of line and the network doesn't have bias +/-

If module is not at the end of line and there is bias +/- on the network

J5 blue terminal is a connector for I2C interface, while J11 blue terminal is a connector for DAC.

Pin Name Function

1 GND Ground reference 2 SDA I2C-bus input/output data 3 SCL I2C-bus clock input

J11

Pin Name Function

1 GND Ground reference 2 DAC Voltage output from DAC

Page 7

ANALOG INPUT (J3) header consists of pins that can be used as analog inputs or digital inputs/outputs. A7 pin can also be used as Counter 1.

DIGITAL I/O (J4) header consists of pins that can be used as digital inputs/outputs. DIO7 pin can also be used as Counter 0.

GPIO & I2C (J10) header consists of pins that can be used as digital inputs/outputs as well as SDA and SCL pins for I2C.

Specification and characteristics of each pin can be seen in the datasheet.

3. INTERFACE

PC-LINK USB SMART I/O has a USB interface that will be recognized and accessible by computer as UART COM port (virtual).

3.1. UART Interface

UART communication parameters are as follows:

• 110 – 256000 bps

• 8 data bit

• 1 stop bit

• no parity bit

• no flow control

Each data packet sent by host begins with initial byte that is followed with 1 byte sum of command byte+data, 1 byte command code, n byte parameter (if needed) and ends with 1 byte LRC.

Start Byte Byte Count Command Parameter LRC

Start Byte always have 0x58 ($58) hexadecimal or 88 decimal value. Byte Count is the sum of Command and Parameter byte (excluding Start Byte, Byte Count, and LRC). LRC is an error checking byte by summing all bytes, from Start Byte to the last Parameter. Only LSB will be taken from the sum results and two's complement will be performed.

PC-LINK USB SMART I/O has a timeout feature for packet reception from host. If there is no received data in ± 1 second, the next data will be treated as a new data packet and module will wait for Start Byte. If timeout occurs in the middle of the packet, then the packet will be ignored. For commands that ask for data, the format of replied data packet from the module will be the same as the format of data packet from the host.

AGND

A0 A2 A4 A6

VCC A1 A3 A5 A7

1 0

ANALOG INPUT (J3) DIGITAL I/O (J4)

PGND

DIO0 DIO2 DIO4 DIO6

VCC DIO1 DIO3 DIO5 DIO7

1 0

PGND GPIO0 GPIO2 GPIO4

SDA

VCC GPIO1 GPIO3

SCL

1 0

GPIO & I2C (J10)

Page 8

For commands that do not ask for data, the module will respond with ACK (0xAA) or NACK (0xEE).

Start Byte 0x01 0xAA / 0xEE LRC

Available commands and parameters can be seen on section 3.2.

Default settings on purchase:

– ANALOG INPUT functions as analog input (no internal pull-up resistor). – DIGITAL I/O and GPIO functions as digital input (no internal pull-up

resistor, Counters are inactive).

– Baud rate UART 9600 bps. – Bit rate I

C 50 kHz.

3.2. COMMAND SET

3.2.1. PING

Is used to check whether the communication line to the module still exists.

Byte Count Command Parameter

Host Command 1 0xFF -

Module Response 1

0xAA

0xEE

If packet is recognized and correct, module will respond with ACK (0xAA). If the packet is false/not recognized, module will respond with NACK (0xEE). Example: PC : 0x58 0x01 0xFF 0xA8 USB Smart I/O : 0x58 0x01 0xAA 0xFD

3.2.2. RESET

Is used to perform soft-reset on the module.

Byte Count Command Parameter

Host Command 1 0x01 -

Module Response 1

0xAA

0xEE

If packet is recognized and correct, module will respond with ACK (0xAA). Module will perform soft-reset with the following effects:

– Module's USB function will be turned off so it will be disconnected from the

computer.

– Module will repeat the process from the start, including USB connection

initialization and EEPROM reading to get each I/O function setting data.

– DAC output is unchanged. If the packet is false/not recognized, module will respond with NACK (0xEE). Example: PC : 0x58 0x01 0x01 0xA6 USB Smart I/O : 0x58 0x01 0xAA 0xFD

Page 9

3.2.3. SET FUNCTION

Is used to set the I/O function on the module.

Byte

Count

Command Parameter

Host Command

5 0x10 PORT ANALOG DIRECT PULL-UP

Module Response

0xAA -

0xEE -

PORT parameter is the port code that will be accessed. 0 represents Analog Input, 1 represents Digital I/O, and 2 represents General Purpose I/O. ANALOG parameter represents 8 bits in 1 port. Each bit is cleared (0) when used as digital i/o or set (1) when used as analog input. When the bit is set (1), then DIRECT and PULL-UP parameters for that bit will be ignored. This parameter only applies for PORT 0. DIRECT parameter represents 8 bits (or 5 bits on General Purpose I/O) in 1 port. Each bit is cleared (0) when used as input or set (1) when used as output. PULL-UP parameter represents 8 bits (or 5 bits on General Purpose I/O) in 1 port. Each bit is cleared (0) to put the represented pin on three-state/low condition, or set (1) to activate its internal pull up resistor. This setting will be saved in EEPROM so it will not be erased when module is powered off. If packet is recognized and correct, module will respond with ACK (0xAA). If the packet is false/not recognized, module will respond with NACK (0xEE). Example: PC : 0x58 0x05 0x10 0x01 0x00 0xF0 0x0F 0x93 USB Smart I/O : 0x58 0x01 0xAA 0xFD will use Digital I/O bit 4-7 as output lines with 0 values, while bit 0-3 as input lines with active internal pull up resistors.

3.2.4. GET FUNCTION

Is used to read I/O function settings on the module.

Byte Count Command Parameter

Host Command

2 0x11 PORT

Module Response

4 0x11 ANALOG DIRECT PULL-UP

1 0xEE -

PORT parameter is the port code that will be accessed. 0 represents Analog Input, 1 represents Digital I/O, and 2 represents General Purpose I/O. ANALOG parameter represents 8 bits in 1 port. Each bit is cleared (0) when used as digital i/o or set (1) when used as analog input. When the bit is set (1), then DIRECT and PULL-UP parameters for that bit must be ignored. This parameter only applies for PORT 0. DIRECT parameter represents 8 bits (or 5 bits on General Purpose I/O) in 1 port. Each bit is cleared (0) when used as input or set (1) when used as output. PULL-UP parameter represents 8 bits (or 5 bits on General Purpose I/O) in 1 port. Each bit is cleared (0) if the represented pin is on three-state/low condition, or set (1) if the internal pull up resistor on the pin is active. If packet is recognized and correct, module will respond with EEPROM reading data result.

Page 10

If the packet is false/not recognized, module will respond with NACK (0xEE). Example: PC : 0x58 0x02 0x11 0x02 0x93 USB Smart I/O : 0x58 0x04 0x11 0x00 0x00 0x1F 0x74 means that the computer requests for General Purpose I/O function and module replies that all General Purpose I/O are digital inputs with active internal pull-up resistors.

3.2.5. GET PORT

Is used to command the module to read the value of a certain port.

Byte Count Command Parameter

Host Command 2 0x12 PORT

Module Response

2 0x12 BYTEVALUE

1 0xEE -

PORT parameter is the port code that will be accessed. 0 represents Analog Input, 1 represents Digital I/O, and 2 represents General Purpose I/O. BYTEVALUE parameter is the value of the port (register PORTx). If packet is recognized and correct, module will respond with data reading result. If the packet is false/not recognized, module will respond with NACK (0xEE). Example: PC : 0x58 0x02 0x12 0x01 0x93 USB Smart I/O : 0x58 0x02 0x12 0x88 0x0C means that the computer requests the value to Digital I/O and module replies that the PORT value on that port is 0x88.

3.2.6. SET BIT

Is used to command the module to change the value of 1 pin on a certain port.

Byte Count Command Parameter

Host Command

4 0x13 PORT BIT BITVALUE

Module Response

0xAA -

0xEE -

PORT parameter is the port code that will be accessed. 0 represents Analog Input, 1 represents Digital I/O, and 2 represents General Purpose I/O. BIT parameter are the bit numbers (0-7) that will be accessed. BIT parameter VALUE are the values that will be sent to the bits. It is cleared (0) to send low logic or set (1) to send high logic. If packet is recognized and correct, module will respond with ACK (0xAA). If the packet is false/not recognized, module will respond with NACK (0xEE). Example: PC : 0x58 0x04 0x13 0x01 0x05 0x01 0x8A USB Smart I/O : 0x58 0x01 0xAA 0xFD will send a value of 1/high to Digital I/O bit 5.

Page 11

3.2.7. GET BIT

Is used to command the module to read the value of 1 pin on a certain port.

Byte Count Command Parameter

Host Command 3 0x14 PORT BIT

Module Response

2 0x14 BITVALUE

1 0xEE -

PORT parameter is the port code that will be accessed. 0 represents Analog Input, 1 represents Digital I/O, and 2 represents General Purpose I/O. BIT parameter are the bit numbers (0-7) that will be accessed. BIT parameter VALUE are the the value of the bit (register PINx), cleared (0) for low logic or set (1) for high logic. If packet is recognized and correct, module will respond with data reading result. If the packet is false/not recognized, module will respond with NACK (0xEE). Example: PC : 0x58 0x03 0x14 0x00 0x02 0x8F USB Smart I/O : 0x58 0x02 0x14 0x00 0x92 means that the computer requests the value of bit 2 on Analog Input and module replies that the logic on that bit is low.

3.2.8. SET BYTE

Is used to command the module to change the value of a certain port.

Byte Count Command Parameter

Host Command 3 0x15 PORT BYTEVALUE

Module Response

0xAA -

0xEE -

PORT parameter is the port code that will be accessed. 0 represents Analog Input, 1 represents Digital I/O, and 2 represents General Purpose I/O. BYTEVALUE parameter is the the value of the byte that will be sent to the port. If packet is recognized and correct, module will respond with ACK (0xAA). If the packet is false/not recognized, module will respond with NACK (0xEE). Example: PC : 0x58 0x03 0x15 0x00 0x55 0x3B USB Smart I/O : 0x58 0x01 0xAA 0xFD will send a value of 0x55 to Analog Input.

3.2.9. GET BYTE

Is used to command the module to read the value of a certain port.

Byte Count Command Parameter

Host Command 2 0x16 PORT

Module Response

2 0x16 BYTEVALUE

1 0xEE -

Page 12

If packet is recognized and correct, module will respond with data reading result. If the packet is false/not recognized, module will respond with NACK (0xEE). Example: PC : 0x58 0x02 0x16 0x01 0x8F USB Smart I/O : 0x58 0x02 0x16 0x88 0x08 means that the computer requests the value of Digital I/O and module replies that the PIN value of that port is 0x88.

3.2.10.GET ADC

Is used to command the module to read ADC value of a certain channel.

Byte Count Command Parameter

Host Command 2 0x17 CHANNEL

Module Response

3 0x17 MSB LSB

1 0xEE -

CHANNEL parameter is the ADC channels (0-7) that will be read. MSB parameter is the most significant byte of ADC reading result. LSB parameter is the least significant byte of ADC reading result. If packet is recognized and correct, module will respond with data reading result. If the packet is false/not recognized, module will respond with NACK (0xEE). Example: PC : 0x58 0x02 0x17 0x03 0x8C USB Smart I/O : 0x58 0x03 0x17 0x03 0xFF 0x8C means that the computer requests the value of ADC channel 3 and module replies that the ADC value of that channel is 1023 (0x03FF).

3.2.11.SET BIT RATE

Is used to set the I2C bit rate.

Byte Count Command Parameter

Host Command 3 0x20 BITRATEH BITRATEL

Module Response

0xAA

0xEE

RATEH parameter BIT is the most significant byte of BITRATE. RATEL parameter BIT is the least significant byte of BITRATE. BITRATE parameter is the bit rate value in kHz. The allowed BITRATE value are around 30-400. This setting will be saved on EEPROM so it will not be erased when module is powered off. If packet is recognized and correct, module will respond with ACK (0xAA). If the packet is false/not recognized, module will respond with NACK (0xEE). Example: PC : 0x58 0x03 0x20 0x00 0x64 0x21 USB Smart I/O : 0x58 0x01 0xAA 0xFD sets the bit rate for I2C to 100 (0x0064) kHz.

Page 13

3.2.12.GET BIT RATE

Is used to read bit rate I2C.

Byte Count Command Parameter

Host Command 1 0x21 -

Module Response

3 0x21 BITRATEH BITRATEL

1 0xEE -

RATEH parameter BIT is the most significant byte of BITRATE. RATEL parameter BIT is the least significant byte of BITRATE. BITRATE parameter is the bit rate value in kHz. If packet is recognized and correct, module will respond with bit rate value. If the packet is false/not recognized, module will respond with NACK (0xEE). Example: PC : 0x58 0x01 0x21 0x86 USB Smart I/O : 0x58 0x03 0x21 0x00 0x32 0x52 means that the computer requests bit rate value and module replies that the bit rate value is 50 (0x0032) kHz.

3.2.13.I2C START

Is used to command the module to send the start condition to I2C line.

Byte Count Command Parameter

Host Command 1 0x22 -

Module Response 1

0xAA

0xEE

If packet is recognized and correct, module will respond with ACK (0xAA). If the packet is false/not recognized, module will respond with NACK (0xEE). Example: PC : 0x58 0x01 0x22 0x85 USB Smart I/O : 0x58 0x01 0xAA 0xFD

3.2.14.I2C WRITE

Is used to command the module to send 1 byte via I2C line.

Byte Count Command Parameter

Host Command 2 0x23 1 byte data

Module Response 1

0xAA

0xEE

If packet is recognized and correct, module will respond with ACK (0xAA). If the packet is false/not recognized, module will respond with NACK (0xEE). Example: PC : 0x58 0x02 0x23 0xA0 0xE3 USB Smart I/O : 0x58 0x01 0xAA 0xFD sends a value of 160 (0xA0) via I2C.

Page 14

3.2.15.I2C READ

Is used to command the module to read 1 byte via I2C line.

Byte Count Command Parameter

Host Command 2 0x24

0x00 (nack)

0x01 (ack)

Module Response

2 0x24 1 byte data

1 0xEE -

Parameter of host is given value of 0 to respond the I2C reception with not acknowledge and value of 1 to respond I2C reception with acknowledge. If packet is recognized and correct, module will respond with data reading result. If the packet is false/not recognized, module will respond with NACK (0xEE). Example: PC : 0x58 0x02 0x24 0x00 0x82 USB Smart I/O : 0x58 0x02 0x24 0x90 0xF2 means that the computer requests 1 data that is found on I2C line and will be responded with not acknowledge. Module replies that the data reading result via I2C has a value of 144 (0x90).

3.2.16.I2C STOP

Is used to command the module to send stop condition to I2C line.

Byte Count Command Parameter

Host Command 1 0x25 -

Module Response 1

0xAA

0xEE

If packet is recognized and correct, module will respond with ACK (0xAA). If the packet is false/not recognized, module will respond with NACK (0xEE). Example: PC : 0x58 0x01 0x25 0x82 USB Smart I/O : 0x58 0x01 0xAA 0xFD

3.2.17.I2C SEND PACKET

Is used to command the module to sends 1 data packet via I2C line.

Byte Count Command Parameter

Host Command 2 – 36 0x26 1 – 35 byte

Module Response 1

0xAA

0xEE

Parameter with maximum amount of 35 bytes includes I2C device address. Transmission will be performed consecutively. Module will send start condition, parameters on command, and stop condition. If packet is recognized and correct, module will respond with ACK (0xAA). If the packet is false/not recognized, module will respond with NACK (0xEE). Example: PC : 0x58 0x05 0x26 0xD0 0x01 0x02 0x03 0xA7 USB Smart I/O : 0x58 0x01 0xAA 0xFD

Page 15

will send start condition, 0xD0 (I2C device write address that will be accessed), 0x01, 0x02, 0x03, and stop condition.

3.2.18.I2C GET PACKET

Is used to command the module to read 1 data packet via I2C line.

Byte Count Command Parameter

Host Command 3 0x27 ADDR COUNT

Module Response

2 – 33 0x27 1 – 32 byte

1 0xEE -

ADDR parameter is the I2C device address that will be accessed. COUNT parameter is the amount of data that will be read. This command will only perform the reading process. To choose the data address that will be read (for example, accessing EEPROM), data address can be determined previously using the I2CSENDPACKET. Module will send start condition, I2C device read address (ADDR|0x01), read data as many as COUNT, and send stop condition. If packet is recognized and correct, module will respond with data reading results (maximum of 32 bytes). If the packet is false/not recognized, module will respond with NACK (0xEE). Example: PC : 0x58 0x03 0x27 0xD0 0x01 0xAD USB Smart I/O : 0x58 0x02 0x27 0x03 0x7C means that the computer commands the module to read 1 byte of I2C device with 0xD1 address. Module replies that the reading results via I2C is 0x03.

3.2.19.SET BAUD RATE

Is used to set UART baud rate.

Byte Count Command Parameter

Host Command 2 0x30 BAUDRATE

Module Response 1

0xAA

0xEE

BAUDRATE parameter is the baud rate value code. Code 1 = baud rate 9600 bps Code 2 = baud rate 19200 bps Code 3 = baud rate 38400 bps Code 4 = baud rate 57600 bps This setting will be saved in EEPROM so it will not be erased when module is powered off. If packet is recognized and correct, module will respond with ACK (0xAA). If the packet is false/not recognized, module will respond with NACK (0xEE). Example: PC : 0x58 0x02 0x30 0x03 0x73 USB Smart I/O : 0x58 0x01 0xAA 0xFD will set baud rate to 38400 bps.

Page 16

3.2.20.GET BAUD RATE

Is used to read UART baud rate.

Byte Count Command Parameter

Host Command 1 0x31 -

Module Response

2 0x31 BAUDRATE

1 0xEE -

BAUDRATE parameter is the baud rate value code. If packet is recognized and correct, module will respond with baud rate value code. If the packet is false/not recognized, module will respond with NACK (0xEE). Example: PC : 0x58 0x01 0x31 0x76 USB Smart I/O : 0x58 0x02 0x31 0x03 0x72 means that the computer requests for baud rate value and module replies that the baud rate has a value of 38400 bps.

3.2.21.SEND UART

Is used to command the module to send a series of data via UART line.

Byte Count Command Parameter

Host Command 2 – 33 0x32 1 – 32 byte

Module Response 1

0xAA

0xEE

Up to 32 bytes parameter will be transmitted consecutively. If packet is recognized and correct, module will respond with ACK (0xAA). If the packet is false/not recognized, module will respond with NACK (0xEE). Example: PC : 0x58 0x04 0x32 0x01 0x02 0x03 0x6C USB Smart I/O : 0x58 0x01 0xAA 0xFD will send 0x01, 0x02, and 0x03 data via UART line.

3.2.22.GET UART

Is used to command the module to read a series of data via UART line.

Byte Count Command Parameter

Host Command 2 0x33 COUNT

Module Response

2 – 33 0xA3 1 – 32 byte

0xAA

0xEE

COUNT parameter is the amount of data that will be read. If packet is recognized and correct, module will respond with data reading results. These are the received data (maximum 32 bytes). If the received data is more than 32 bytes, then the 33rd data onwards will overwrite the first data and onwards (roll-over). If the COUNT value is larger than the amount of data on the buffer, then the module will only send the data on the buffer.

Page 17

If the COUNT value is smaller than the amount of data on the buffer, then the module will only send data as many as COUNT value. After reading process, all of buffer contents will be erased. If there is no data reception, module will respond with ACK (0xAA). If the packet is false/not recognized, module will respond with NACK (0xEE). Example: PC : 0x58 0x02 0x33 0x03 0x70 USB Smart I/O : 0x58 0x04 0x33 0x01 0x02 0x03 0x6B means that the computer requests for 3 data and module replies with reading results, which are 0x01, 0x02, 0x03.

3.2.23.SEND DAC

Is used to command the module to send value to DAC and convert it into analog voltage.

Byte Count Command Parameter

Host Command 2 0x40 VALUE

Module Response 1

0xAA

0xEE

Parameter VALUE are the values (0-255) that will be converted into analog voltage (0-±5.1). If packet is recognized and correct, module will respond with ACK (0xAA). If the packet is false/not recognized, module will respond with NACK (0xEE). Example: PC : 0x58 0x02 0x40 0x80 0xE6 USB Smart I/O : 0x58 0x01 0xAA 0xFD will send a value of 128 (0x80) to DAC that will be converted to about 2.58 V voltage.

3.2.24.STOP COUNTER

Is used to command the module to stop a certain counter.

Byte Count Command Parameter

Host Command 2 0x50 COUNTER

Module Response 1

0xAA

0xEE

COUNTER parameter is the counter number that will be accessed, has a value of 0 or 1. If packet is recognized and correct, module will respond with ACK (0xAA). If the packet is false/not recognized, module will respond with NACK (0xEE). Example: PC : 0x58 0x02 0x50 0x01 0x55 USB Smart I/O : 0x58 0x01 0xAA 0xFD will stop Counter 1.

Page 18

3.2.25.START COUNTER

Is used to command the module to activate a certain counter.

Byte Count Command Parameter

Host Command 2 0x51 COUNTER

Module Response 1

0xAA

0xEE

COUNTER parameter is the counter number that will be accessed, has a value of 0 or 1. When the counter is activated with this command, then the pin that the counter used will be configured into a digital input with active internal pull-up resistor. This new setting will also be saved into EEPROM. If packet is recognized and correct, module will respond with ACK (0xAA). If the packet is false/not recognized, module will respond with NACK (0xEE). Example: PC : 0x58 0x02 0x51 0x00 0x55 USB Smart I/O : 0x58 0x01 0xAA 0xFD will activate Counter 0.

3.2.26.GET COUNTER

Is used to command the module to read counting results of a certain counter.

Byte Count Command Parameter

Host Command 2 0x52 COUNTER

Module Response

3 0x52 MSB LSB

1 0xEE -

COUNTER parameter is the counter number that will be accessed, has a value of 0 or 1. MSB parameter is the most significant byte of counter reading results. LSB parameter is the least significant byte of counter reading results. If packet is recognized and correct, module will respond with data reading results. If the packet is false/not recognized, module will respond with NACK (0xEE). Example: PC : 0x58 0x02 0x52 0x00 0x54 USB Smart I/O : 0x58 0x03 0x52 0x01 0x80 0xD2 means that the computer requests the value of Counter 0 and module replies that the counter value is 384 (0x0180).

3.2.27.GET VERSION

Is used to read module firmware version.

Byte Count Command Parameter

Host Command 1 0xFE -

Module Response

3 0xFE Major Minor

1 0xEE -

Parameter Major and Minor show the firmware version in decimals with Major.Minor format.

Page 19

If packet is recognized and correct, module will respond with data reading results. If the packet is false/not recognized, module will respond with NACK (0xEE). Example: PC : 0x58 0x01 0xFE 0xA9 USB Smart I/O : 0x58 0x03 0xFE 0x01 0x00 0xA6 means that the computer requests the firmware version and module replies that the version is 1.0 (0x01 0x00).

4. Testing Procedure

1. Connect DT-I/O I2C Peripheral to PC-LINK USB SMART I/O via J5 blue terminal.

2. Connect DT-I/O RS232-RS485 Converter, DT-I/O Neo RS232 to RS485 Converter, or DT-I/O USB to UART Converter to computer and to PC-LINK USB SMART I/O via RS485 (J15) blue terminal.

3. Prepare a Voltmeter and DT-I/O LED Logic Tester.

4. Connect power supply to the modules.

5. If the power supply has been correctly connected, then the POWER PCLINK USB SMART I/O will light up.

6. Connect the USB Mini-B connector to USB port on the computer using the provided USB cable.

7. Run SmartIO.exe.

8. Select the COM Port that will be used. Click the Refresh button to show the recently connected COM port.

9. Click Open.

10.On the Testing section (right), give the check mark on the Auto, then Click the Test button.

11.Follow each step that appear before and after testing procedures.

12.ANALOG INPUT, DIGITAL I/O, and GP I/O testing will make DT-I/O LED Logic Tester's LEDs blink alternately.

13.DAC testing will produce increasing voltage of 0 up to ±5.1VDC.

14.I2C testing will write and read DT-I/O I2C Peripheral's EEPROM. The results of writing and reading of the first 8 bytes must have the same results, which are 1, 3, 7, 15, 31, 63, 127, and 255.

Page 20

15.UART TTL and RS232 (by shorting RX and TX) will produce the same byte values between Out and In, which are 1, 3, 7, 15, 31, 63, 127, and 255. When the connection between RX and TX is released, the status bar (in the bottom) will show that there is no data.

16.UART RS485 testing will send 1, 3, 7, 15, 31, 63, 127, and 255 to computer. And the next data sent by the computer must match the data that the module reads.

5. PROGRAM EXAMPLE

SmartIO program source code is included in the CD/DVD. This source code can be used as a guideline to make other programs. The following are the explanations of each SmartIO.exe GUI function.

Get Baud

Rate

Set Baud

Rate

Baud Rate reading results /

Determined Baud Rate

Send DAC

Value sent to DAC

Get Version

Ping Reset

Version reading

result

Get Bit

Rate

Set Bit

Rate

Bit Rate reading results /

Determined Bit Rate

I2C

Start

Sent byte

I2C

Write

I2C

Read

I2C

Stop

Reading

result byte

Ack/Nack

Get Function

Get Port

Analog

Direct

Pull-up

Port Selection

Set Function

Page 21

Logika Bit

Bit Selection

Set Bit Get Bit

ADC Channel Selection

Port Selection

ADC reading results

Get ADC

Sent Byte Set Byte

Get Byte

Reading result bytes

Get Counter

Port Selection

Counter reading results

Counter selection

Start Counter

Stop Counter

Page 22

♦ Thank you for your confidence in using our products, if there are difficulties, questions,

or suggestions regarding this product please contact our technical support:

[email protected]

I2C Send Packet Send UART

Amount of I2C bytes

that will be read

Amount of UART bytes

that will be read

I2C Get

Packet

Get UART

Sent data

column

Read data

column

Page 23

Attachment A. PC-LINK USB SMART I/O Schematics