Page 421 - Programming Microcontrollers in C

406 Chapter 8 MCORE, A RISC Machine

U1PCR.PC3=ON; /* connect all i/o pins to the uart */
U1PCR.PC2=ON;
U1PCR.PC1=ON;
U1PCR.PC0=ON;
U1DDR.PDC1=ON; /* make output pin for the uart */
} /* probably not needed */

/* send a character out the serial port when it is ready */
static void put(BYTE x)
{
while((U1SRint & TRDYint)==0)
; /* wait until character is ready */
U1TX.DATA =x; /* send the data out */
}

/* read in and echo a character through the serial port */
BYTE getchar(void)
{
BYTE a;

while((U1RXint & CHARRDYint)==0)
; /* wait till character is ready */
a=U1RX.DATA;
putchar(a);
return a;
}

/* read in a character with no echo */
BYTE getch(void)
{
BYTE a;

while((U1RXint & CHARRDYint)==0)
; /* wait till character is ready */
a=U1RX.DATA;
return a;
}

/* read in a character from the serial port. Do not
check for the character ready. This routine should be used
with kbhit(). */
BYTE getce(void)
{
return U1RX.DATA;
}