CCS Example on Real Time Interfacing: Can Anyone Explain

[New_Convert]

Here's a snippet of code from the CCS Exercise book.
I can't see at any stage this code can get a character 'S' (the 4th last line here).

So, I don't quite understand how the statement
if(kbhit() && (getc() == 'S'))
could evaluate to TRUE.


I know this sounds simple to most of you here. That's why I'm turning to you guys.





#include <protoalone.h>
#include <nju6355.c>
#include <bcd.c>

void set_time()
{
int hour, min;

printf("\r\nHour: "); hour = get_bcd();
printf("\r\nMin: "); min = get_bcd();
rtc_set_datetime(0,0,0,0,hour,min);
}


void main()
{
int hour,min,sec,last_sec;

rtc_init();
while(1)
{
rtc_get_time(hour, min, sec);
if(sec != last_sec)
{
printf("\r\n");
display_bcd(hour); putc(':');
display_bcd(min); putc(':');
display_bcd(sec);
last_sec = sec;
}
if(kbhit() && (getc() == 'S'))
set_time();
}
}

[Guest]

That is if it has received an S from the UART.

kbhit checks for a new character in the receive buffer, then checks if it is an 'S'.