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UM017105-0511 Standard Functions

Zilog Developer Studio II – ZNEO™

User Manual

433

In no case does a nonexistent or small field width cause truncation of a field. If the result

of a conversion is wider than the field width, the field is expanded to contain the conver-

sion result.

putchar

Writes a character to the serial port.

Synopsis

#include <stdio.h>

int putchar(int c);

Returns

The character written. If a write error occurs, putchar returns EOF.

Example

int i;

charc='a';

i=putchar(c);

The UART must be initialized using the Zilog init_uart() function. See the init_uart

command on page 182.

s The argument is taken to be a (const char *) pointer to a string. Characters

from the string are written up to, but not including, the terminating null char-

acter, or until the number of characters indicated by the precision are writ-

ten. If the precision is missing it is taken to be arbitrarily large, so all

characters before the first null character are written.

p The argument is taken to be a (const void) pointer to an object. The value of

the pointer is converted to a sequence of hex digits.

n The argument is taken to be an (int) pointer to an integer into which is writ-

ten the number of characters written to the output stream so far by this call

to printf. No argument is converted.

% A % is written. No argument is converted.

Note:

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