Zilog ZUSBOPTS Bedienungsanleitung PDF herunterladen (Seite 211)

100

101

UM017105-0511 Run-Time Library

Zilog Developer Studio II – ZNEO™

User Manual

183

Before using the kbhit function, the init_uart() function must be called to initialize

and select the UART. The default UART is _UART0.

putch

putch is a Zilog function that sends a character to the selected UART and returns an error

status.

Synopsis

#include <sio.h>

int putch( char ch ) ;

Returns

A zero is returned on success; a nonzero is returned on failure.

Example

char ch = 'c' ;

int err;

err = putch( ch ) ;

Before using the putch function, the init_uart() function must be called to initialize

and select the UART. The default UART is _UART0.

RI (restore interrupt) is an intrinsic function that restores interrupt status. It is intended to

be paired with an earlier call to

TDI(), which has previously saved the existing interrupt

status. See the TDI

section on page 185 for a discussion of that function. The interrupt sta-

tus, which is passed as a parameter to

RI(), consists of the Flags register extended to

16 bits for efficient stack storage. This function inline-expanded by default. If the

–redu-

ceopt

compiler option is selected, then this function is not inline-expanded and is instead

implemented as a regular function.

Synopsis

#include <zneo.h>

intrinsic void RI(unsigned short istat);

Example

#include <zneo.h>

Note:

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