Page 200 - ARM Based Microcontroller Projects Using MBED

FIG. 8.48 An example game.

BEGIN/MAIN
Configure LED1 as output
Attach serial communication link to function ISR
dly = 0.1 seconds
DO FOREVER
LED ON
Wait dly seconds
LED OFF
Wait dly seconds
ENDDO
END/MAIN

BEGIN/ISR
Read a character from the keyboard
IF the character = ‘+’ THEN
dly = dly + 0.1
IF dly > 1 second THEN
Dly = 0.1s
ENDIF
ENDIF
END/ISR
FIG. 8.49 Program PDL.