PEP Modular Computers Modular Computers RS485 - Page 103

SMART I/O User’s Manual
©1996 PEP Modular Computers GmbHMarch 12, 1996 Page 4 - 15
4
Chapter 4 Digital Modules
4.1.8.4 SMDIN1Get
Syntax
error_code SMDIN1Get(u_int8 PortNr, u_int8 *buffer);
Description
This function fetches the status of ALL 8 input lines of the port PortNr and
writes it to the address pointed to by buffer with bit 0 of the buffer represent-
ing input 0 of the module.
Input
u_int8 PortNr SM-Port number to fetch data
u_int8 *buffer Pointer to Buffer where data is to be
stored
Output
error_code SUCCESS
or OS-9 error code (refer to the OS-9 Technical
Manual Error Codes Section).
Example
RetVal = SMDIN1Get(0, buffer);
Buffer Explanation:
D7 D0
Ch.7 Ch.6 Ch.5 Ch.4 Ch.3 Ch.2 Ch.1 Ch.0
Bit Value : 0 = No input or not connected
1 = Input Active