Motorola M5271EVB, User Manual

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Chapter 3. Using the Monitor/Debug Firmware 3-41
TRAP #15 Functions
asm (“ trap#15”); /* make the call */
#endif
}
3.5.2 IN_CHAR
This function (function code 0x0010) returns an input character (from terminal) to the
caller. The returned character is in D1.
Assembly example:
move.l #$0010,d0 Select the function
trap #15 Make the call, the input character is in d1.
C example:
int board_in_char (void)
{
asm (“ move.l#0x0010,d0”); /* select the function */
asm (“ trap#15”); /* make the call */
asm (“ move.ld1,d0”); /* put the character in d0 */
}
3.5.3 CHAR_PRESENT
This function (function code 0x0014) checks if an input character is present to receive. A
value of zero is returned in D0 when no character is present. A non-zero value in D0 means
a character is present.
Assembly example:
move.l #$0014,d0 Select the function
trap #15 Make the call, d0 contains the response (yes/no).
C example:
int board_char_present (void)
{
asm (“ move.l#0x0014,d0”); /* select the function */
asm (“ trap#15”); /* make the call */
}