Pepper-computer Modular Computers RS485 Bedienungsanleitung PDF herunterladen (Seite 173)

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101

SMART I/O User’s Manual

Chapter 5 Analog Modules

5.1.8.2 SMDAD1Init

Syntax

error_code SMDAD1Init(u_int8 PortNr);

Description

This function initializes the resources needed to use the SM-DAD1 on port

PortNr, including:

- testing of the SM-Module ID;

- reading the factory-set conversion table held in the EEPROM;

- setting the ADC to bipolar mode and the DAC to unipolar mode;

- fetching the resources.

Input

u_int8 PortNr

SM-Port number to initialize

(from 0 to 10)

Output

error_code SUCCESS or

E_BMODE if wrong or no module

E_MEMFUL if no memory resources available

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

Technical Manual Error Codes Section).

Example

RetVal = SMDAD1Init(0);

Note

If the same SM-DAD1 Module is to be accessed from different tasks, the

user must make sure that the actual output status is ensured by using for

example, semaphores within OS-9.

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