Pepper-computer Modular Computers RS485 Uživatelský manuál stáhnout pdf (Strana 60)

100

101

SMART I/O User’s Manual

March 12, 1996

Page 2 - 20

Chapter 2 SMART-BASE

2.6.3 SMTsettout

Syntax

error_code SMTsettout(u_int8 mode);

Description

This function sets the timer output (TOUT) control.

Input

u_int8 mode

Two modes of TOUT control are available. They are:

MODE_PORTC

tout has the Simple I/O function.

MODE_SQUARE

tout toggles on counter zero.

When the timer is stopped, tout is high (see diagram).

Output

error_code SUCCESS

E_BMODE

Unsupported mode

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

Technical Manual Error Codes Section).

Example

RetVal = SMTsettout(MODE_SQUARE);

OUT

OFF

Timer

Stop

The high state of TOUT illustrated in the above diagram shows that the

output is deactivated i.e. OFF. Only when TOUT is in the low state can a

load be driven.

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