Alberici AL66 FG ARM, Руководство оператора

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7.2 Message structure
The display can work only as slave and does not reply to any of the command messages sent by the host.
There are two different sets of commands:
- Display coin selector data
- Display message
First set is used to show specific coin selector data and second is used to show any display message.
7.2.1 Display coin selector data
The coin selector will send to the display controller the following command string:
[ 0xC0 ]
[ 0x08 ]
[ Display mode ]
[ Display multiplier and decimal position ]
[ Display light int. ]
[ Accumulated credit ]
[ Accumulated value ]
[ Time in minutes ]
[ Time in sec. ]
[ Display warnings ]
The first byte
0xC0
in message string means the type of message. The Hex code
0xCO
displays specific
data of the coin selector.
The second byte is always
0x08 and represents the 8 bytes of data in the string.
Display mode is the code for showing further and different coin selector data. It is not possible to present all the
data of the coin selector at the same time. Possible combinations and codes are shown in table below:
A special case of message is when this byte is 0x00 and there are no other of data to consider. It is used to turn off
the background light of the display, stop the operation of the display device, and set to power saving mode ( stop
mode ) the MCU communication MCU. Details concerning such data are not described in this document.
The Display multiplier and decimal position code must be used when
the inserted value must be displayed. Coin selectors use relative coin value
for their programming - but this is not at all a practical information to be
displayed for Users. Because of that, this value must usually be multiplied
and decimals must be set.
For instance: if the 50 cent coin has been programmed with relative
value = 1, in order to display its value as an understandable 0,50 (€),
the relevant value 1 must be multiplied by 50. For this reason, 2 decimal
positions must be made available. Tables 3a and 3b show the codes
corresponding to the various multipliers and decimal positions.