Zilog ZUSBOPTS - Manual (Page 461)

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

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: