Philips PC-Link User manual

USB Smart I/O
Trademarks & Copyright
I2C is a Registered Trademark of Philips Semiconductors.
AT, I M, and PC are trademarks of International usiness 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.
orland Delphi is copyright by orland Software Corporation.

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 it........................................................................................................... 10
3.2.7. Get it.......................................................................................................... 11
3.2.8. Set yte........................................................................................................ 11
3.2.9. Get yte...................................................................................................... 12
3.2.10. Get ADC...................................................................................................... 12
3.2.11. Set it Rate.................................................................................................. 12
3.2.12. Get it 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 aud Rate............................................................................................. 15
3.2.20. Get aud 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 xample..................................................................................... 20
Attachment
A. PC-LINK US SMART I/O Schematics.................................................... 23
2

1. INTRODUCTION
PC-LINK US SMART I/O is a US device that functions as controller of multiple
input/output lines and interfaces. Examples of PC-LINK US 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. SP CIFICATION
PC-LINK US SMART I/O specification are as follows:
•Connection to host (computer) uses US interface which will be recognized
as COM Port (virtual) with 8-n-1 parameters (8 bit data, 1 stop bit, without
parity) and Auto aud 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 I2C interface with bit rate between 30 - 400 kHz (default is
50 kHz). Module acts as master.
•I2C 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. SUGG ST D SYST M
Suggested system for PC-LINK US SMART I/O:
Hardware:
•PC™ AT™ Pentium® I M™ Compatible with US port.
•DVD-ROM Drive and Hard disk.
Software:
•Windows® XP Operating System.
•orland 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 PC-
LINK US SMART IO MANUAL.
3

DC Jack Polarity
2. HARDWAR
2.1. COMPON NT LAYOUT
2.2. CONN CTOR AND JUMP R S TTINGS
J2 DC Jack and J1 blue terminal are connectors for power supply input, whilst
J12 blue terminal functions as voltage output from regulator.
J1
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)
4

SDA SCL
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 +)
5

J17 J18
3
2
1
16
14
13
16
14
13
16
14
13
J17 J18
3
2
1
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 xamples Jumper Configuration xamples
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.
J5
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
6

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. INT RFAC
PC-LINK US SMART I/O has a US 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 yte yte Count Command Parameter LRC
Start yte always have 0x58 ($58) hexadecimal or 88 decimal value.
yte Count is the sum of Command and Parameter byte (excluding Start yte,
yte Count, and LRC).
LRC is an error checking byte by summing all bytes, from Start yte to the last
Parameter. Only LS will be taken from the sum results and two's complement
will be performed.
PC-LINK US 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 yte.
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.
7
AGND
A0
A2
A4
A6
VCC
A1
A3
A5
A7
2 1
10
9
ANALOG INPUT (J3) DIGITAL I/O (J4)
PGND
DIO0
DIO2
DIO4
DIO6
VCC
DIO1
DIO3
DIO5
DIO7
2 1
10
9
PGND
GPIO0
GPIO2
GPIO4
SDA
VCC
GPIO1
GPIO3
SCL
2 1
10
9
GPIO & I2C (J10)

For commands that do not ask for data, the module will respond with ACK
(0xAA) or NACK (0xEE).
Start yte 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).
–aud rate UART 9600 bps.
–it rate I2C 50 kHz.
3.2. COMMAND S T
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 10xAA -
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
US Smart I/O : 0x58 0x01 0xAA 0xFD
3.2.2. R S T
Is used to perform soft-reset on the module.
Byte Count Command Parameter
Host Command 1 0x01 -
Module Response 10xAA -
0xEE
If packet is recognized and correct, module will respond with ACK (0xAA).
Module will perform soft-reset with the following effects:
–Module's US function will be turned off so it will be disconnected from the
computer.
–Module will repeat the process from the start, including US 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
US Smart I/O : 0x58 0x01 0xAA 0xFD
8

3.2.3. S T 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 10xAA -
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
US 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. G T 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.
9

If the packet is false/not recognized, module will respond with NACK (0xEE).
Example:
PC : 0x58 0x02 0x11 0x02 0x93
US 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. G T 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 YTEVALUE
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.
YTEVALUE 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
US 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. S T 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 IT ITVALUE
Module
Response 10xAA -
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.
IT parameter are the bit numbers (0-7) that will be accessed.
IT 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
US Smart I/O : 0x58 0x01 0xAA 0xFD
will send a value of 1/high to Digital I/O bit 5.
10