Embedded Solutions P104-DIO-96, Руководство пользователя

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Manual P104-DIO-96 14
Programming Example
The following programming example is provided as a guide to assist you in developing your working
software. In this example, the board base address is 2D00 hex and I/O lines of Port 0 are to be setup as
follows:
port
A = Input
port B = Output
port C hi = Input
port C lo = Output
Configure bits of the Control Register as:
D7 1 Active Mode Set
D6 0 0
D5 0 0
D4 1 Port A = input
D3 1 Port C Hi = input
D2 0 0
D1 0 Port B = output
D0 0 Port C Lo = output
This corresponds to 98 hex. If the card base address is 2D00 hex, use the BASIC OUT command to write
to the control register as follows:
10
BASEADDR=&H2D00
20 OUT B3,&H98
To read the inputs at Port A and the upper nybble of Port C, use the BASIC INPUT command:
30
X=INP(BASEADDR)'Read Port A
40 Y=INP(B2)/16'Read Port C Hi
To set outputs high ("1") at Port B and the lower nybble of Port C:
50 OUT B1,&HFF'Turn on all Port B bits
60 OUT B2,&HF'Turn on all bits of Port C Lo