University of Plymouth - Stages 1, 2 and 3 / Mbed OS Task344Solution

Task 3.4.4 Solution

Fork of Task344Solution by Nicholas Outram

main.cpp@2:7d9f93c3d682, 2019-09-18 (annotated)

Committer:
noutram
Date:
Wed Sep 18 12:43:44 2019 +0000
Revision:
2:7d9f93c3d682
Parent:
0:eebd090fb610 
2019

Who changed what in which revision?

UserRevisionLine numberNew contents of line
noutram 0:eebd090fb610 1 #include "mbed.h"
noutram 0:eebd090fb610 2
noutram 2:7d9f93c3d682 3 #ifdef TARGET_NUCLEO_F429ZI
noutram 2:7d9f93c3d682 4 //#define ONBOARD
noutram 2:7d9f93c3d682 5 #endif
noutram 2:7d9f93c3d682 6
noutram 2:7d9f93c3d682 7 #ifdef ONBOARD
noutram 2:7d9f93c3d682 8 BusOut binaryOutput(LED1, LED2, LED3);
noutram 2:7d9f93c3d682 9 #else
noutram 0:eebd090fb610 10 //Global objects
noutram 0:eebd090fb610 11 BusOut binaryOutput(D5, D6, D7);
noutram 2:7d9f93c3d682 12 #endif
noutram 0:eebd090fb610 13
noutram 0:eebd090fb610 14
noutram 0:eebd090fb610 15 //Main function
noutram 0:eebd090fb610 16 int main() {
noutram 0:eebd090fb610 17
noutram 0:eebd090fb610 18 //Create a variable to hold the bit pattern
noutram 0:eebd090fb610 19 unsigned int u;
noutram 0:eebd090fb610 20
noutram 0:eebd090fb610 21 while(1) {
noutram 0:eebd090fb610 22
noutram 0:eebd090fb610 23 u = 1; //Set initial value 0
noutram 0:eebd090fb610 24 int count = 0;
noutram 0:eebd090fb610 25 while (count++ < 3) {
noutram 0:eebd090fb610 26 binaryOutput = u; //Write to LEDs
noutram 0:eebd090fb610 27 u = u << 1; //Shift left 1 bit
noutram 0:eebd090fb610 28 wait(0.25); //Wait
noutram 0:eebd090fb610 29 }
noutram 0:eebd090fb610 30
noutram 0:eebd090fb610 31 //At this point, the output is binary 100
noutram 0:eebd090fb610 32 //Change to 010
noutram 0:eebd090fb610 33 binaryOutput = 2; //The missing yellow state
noutram 0:eebd090fb610 34 wait(0.25);
noutram 0:eebd090fb610 35
noutram 0:eebd090fb610 36 //The sequence can now repeat
noutram 0:eebd090fb610 37 } //end while(1)
noutram 0:eebd090fb610 38 } //end main