Pepper Computer Modular Computers RS232 User Manual

SMART I/O User’s Manual

©1996 PEP Modular Computers GmbH

March 12, 1996

Page 4 - 27

Chapter 4  Digital Modules

error_code SMDOUT1Get(u_int8 PortNr, u_int8 *buffer);

This function fetches the output status of the port PortNr and writes it to the

memory location pointed to by buffer. This buffer shows the status of all 8

outputs with bit 0 representing output 0 of the module.

u_int8 PortNr

SM-Port number to fetch data

u_int8 *buffer

Pointer to a buffer where data is to be

stored.

error_code

SUCCESS

or standard OS-9 error code (refer to the OS-9

Technical Manual Error Codes Section).

RetVal = SMDOUT1Get(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 = Output is ON

1 = Output is OFF