Page 151 - ARM Based Microcontroller Projects Using MBED

8.2 PROJECT 1—TWO-DIGIT MULTIPLEXED 7-SEGMENT LED 137

FIG. 8.3 Circuit diagram of the project.

BEGIN
Group PORT C pins as a single variable
Define the segment bit patterns
Configure PC_8 and PC_9 as outputs
CNT = 25
DO FOREVER
Extract the MSD digit of CNT
Extract the LSD digit of CNT
Send bit pattern corresponding to MSD to PORT C
Enable MSD Digit
Wait for 10ms
Disable MSD Digit
Send bit pattern corresponding to LSD to PORT C
Enable LSD Digit
Wait for 10ms
Disable LSD Digit
ENDDO
END
FIG. 8.4 Program PDL.