Echelon Neuron C Bedienungsanleitung PDF herunterladen (Seite 143)

Neuron C Reference Guide 123

Example

void f(void)

{

unsigned value;

...

value = random();

}

resp_alloc( ) Built-in Function

The resp_alloc( ) built-in function allocates an object for an outgoing response.

The function returns TRUE if a resp_out object can be allocated. The function

returns FALSE if a resp_out object cannot be allocated. When this function

returns FALSE, a program can continue with other processing, if necessary,

rather than waiting for a free message buffer.

See Chapter 6,

How Devices Communicate Using Application Messages,

in the

Neuron C Programmer's Guide

for more information about application messages.

Syntax

boolean resp_alloc (void);

Example

when (...)

{

if (resp_alloc()) {

// OK. Build and send message

...

}

resp_cancel( ) Built-in Function

The resp_cancel( ) built-in function cancels the response being built and frees the

associated resp_out object, allowing another response to be constructed.

If a response is constructed but not sent before the critical section (for example, a

task) is exited, the response is automatically cancelled. See Chapter 6,

How

Devices Communicate Using Application Messages,

of the

Neuron C

Programmer's Guide

for more information.

Syntax

void

resp_cancel (void);

Example

void f(void)

{

if (resp_alloc()) {

...

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