Command Set; Ping; Reset - Philips PC-Link Manual

For commands that do not ask for data, the module will respond with ACK
(0xAA) or NACK (0xEE).
Start Byte
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.
–
2
Bit rate I
–
3.2.

COMMAND SET

3.2.1. PING

Is used to check whether the communication line to the module still exists.
Host Command
Module Response
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
USB Smart I/O

3.2.2. RESET

Is used to perform soft-reset on the module.
Host Command
Module Response
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
USB Smart I/O
0x01 0xAA / 0xEE
C 50 kHz.
Byte Count
1
1
: 0x58 0x01 0xFF 0xA8
: 0x58 0x01 0xAA 0xFD
Byte Count
1
1
: 0x58 0x01 0x01 0xA6
: 0x58 0x01 0xAA 0xFD
LRC
Command
0xFF
0xAA
0xEE
Command
0x01
0xAA
0xEE
8
Parameter
-
-
Parameter
-
-