Diesse MINI-CUBE - Page 54

Rev. 1.2 (12.2021) MINI-CUBE | SERVICE MANUAL 54
Foreword: Hexadecimal ASCII (HEX-ASCII) representation
In the protocol described below, a great deal of the parameters and data are
represented in Hexadecimal ASCII (HEX-ASCII) format, in other words: a byte with
a value of 0x7A is represented by two ASCII characters: ‘7’ (0x37) and ‘A’ (0x41), the
first represents the most significant nibble and the second, the least significant.
Examples:
Original Byte
Representation HEX-ASCII
Hexadecimal value
H characters
L characters
0x45
‘4’ (0x34)
‘5’ (0x35)
0xC8
‘C’ (0x43)
‘8’ (0x38)
0x6F
‘6’ (0x36)
‘F’ (0x46)
0x10
‘1’ (0x31)
‘0’ (0x30)
As can be seen, this type of representation means that two ASCII characters are
necessary for representing the value of one byte.
General remarks: Delay in replying
To allow the machine time to activate the reception mode it is necessary to enter a delay
of 1 second on the reply.
Message for sending Results: Command 0x51
The MINI-CUBE host protocol is a one-way protocol without query.
In particular, the MINI-CUBE send a message to the host computer, which contains the
results of the analyses carried out on one or more tubes.
Command: MINI-CUBE sends the following frame:
STX
(0x3E)
H-BLK
(0x30)
L-BLK
(0x30)
H-LEN
L-LEN
H-ADD
(0x30)
L-ADD
(0x31)
H-COM
(0x35)
L-COM
(0x31)
Data-1
...
Data-n
ETX
(0x0D)
H-CHK
L-CHK
The hexadecimal values indicated in brackets are constant values for this message. The
fields in bold print are the variable ones and are described below:
H-LEN / L-LEN:
Length of the data field, from Data-1 to Data-n inclusive, represented in HEX-ASCII.
Maximum value ‘F’ (0x46) / ‘F’ (0x46). This is the effective number of bytes contained in
the data field. The maximum number of bytes contained in the ‘Data’ field is in fact 255.
Data-1 .. Data-n:
Data field. The data field for the message code 0x51 consists of the following: