Contec F&eIT Series, Руководство пользователя

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4. Using the I/O Address Map
24
ADI16-4(FIT)GY
Number of data items stored in FIFO memory
You can check the number of data items remaining in FIFO memory.
Starting
I/O
address D7 D6 D5 D4 D3 D2 D1 D0
Output Command
+24
(18h)
0 0 0 0 1 0 0 0
D7 D6 D5 D4 D3 D2 D1 D0
Output FIFO Flag
+28
(1Ch)
0
Number of
Data6
Number of
Data5
Number of
Data4
Number of
Data3
Number of
Data2
Number of
Data1
Number of
Data0
Figure 4.12. Number of data items stored in FIFO memory
The following example can be used to check the number of data items stored in FIFO memory.
outp( ADR+24, 0x8 );
NumberOfData = inp( ADR+28 );
FIFO memory clearance
Stored data is cleared.
Starting
I/O
address D7 D6 D5 D4 D3 D2 D1 D0
Output Command
+24
(18h)
0 0 0 0 1 0 0 1
Figure 4.13. FIFO memory clear
The following example can be used to set the FIFO memory clear.
outp( ADR+24, 0x9 );