University of Plymouth - Stages 1, 2 and 3
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Task132Solution
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Task132Solution
by 
Nicholas Outram
main.cpp@2:bc188ffd11f8, 2019-09-10 (annotated)
- Committer:
- noutram
- Date:
- Tue Sep 10 14:32:04 2019 +0000
- Revision:
- 2:bc188ffd11f8
- Parent:
- 0:8c84f2a81909
2019
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| noutram | 0:8c84f2a81909 | 1 | //This is known as a “header file” |
| noutram | 0:8c84f2a81909 | 2 | //In short, this copies and pastes the text file |
| noutram | 0:8c84f2a81909 | 3 | //mbed.h into this code |
| noutram | 0:8c84f2a81909 | 4 | #include "mbed.h" |
| noutram | 0:8c84f2a81909 | 5 | |
| noutram | 0:8c84f2a81909 | 6 | //Create a DigitalOut “object” called myled |
| noutram | 0:8c84f2a81909 | 7 | //Pass constant D7 as a “parameter” |
| noutram | 0:8c84f2a81909 | 8 | DigitalOut redLED(D7); |
| noutram | 0:8c84f2a81909 | 9 | DigitalOut yellowLED(D6); |
| noutram | 0:8c84f2a81909 | 10 | DigitalOut greenLED(D5); |
| noutram | 0:8c84f2a81909 | 11 | |
| noutram | 0:8c84f2a81909 | 12 | //The main function - all executable C / C++ |
| noutram | 0:8c84f2a81909 | 13 | //applications have a main function. This is |
| noutram | 0:8c84f2a81909 | 14 | //out entry point in the software |
| noutram | 0:8c84f2a81909 | 15 | int main() { |
| noutram | 0:8c84f2a81909 | 16 | |
| noutram | 0:8c84f2a81909 | 17 | redLED = 0; |
| noutram | 0:8c84f2a81909 | 18 | yellowLED = 0; |
| noutram | 0:8c84f2a81909 | 19 | greenLED = 0; |
| noutram | 0:8c84f2a81909 | 20 | |
| noutram | 0:8c84f2a81909 | 21 | // ALL the code is contained in a |
| noutram | 0:8c84f2a81909 | 22 | // “while loop" |
| noutram | 0:8c84f2a81909 | 23 | |
| noutram | 0:8c84f2a81909 | 24 | |
| noutram | 0:8c84f2a81909 | 25 | while(1) |
| noutram | 0:8c84f2a81909 | 26 | { |
| noutram | 0:8c84f2a81909 | 27 | //The code between the { curly braces } |
| noutram | 0:8c84f2a81909 | 28 | //is the code that is repeated |
| noutram | 0:8c84f2a81909 | 29 | |
| noutram | 0:8c84f2a81909 | 30 | //STATE 1 (R) |
| noutram | 0:8c84f2a81909 | 31 | redLED = 1; |
| noutram | 0:8c84f2a81909 | 32 | yellowLED = 0; |
| noutram | 0:8c84f2a81909 | 33 | greenLED = 0; |
| noutram | 0:8c84f2a81909 | 34 | wait(1.0); |
| noutram | 0:8c84f2a81909 | 35 | |
| noutram | 0:8c84f2a81909 | 36 | //STATE 2 (RA) |
| noutram | 0:8c84f2a81909 | 37 | yellowLED = 1; |
| noutram | 0:8c84f2a81909 | 38 | wait(1.0); |
| noutram | 0:8c84f2a81909 | 39 | |
| noutram | 0:8c84f2a81909 | 40 | //STATE 3 (G) |
| noutram | 0:8c84f2a81909 | 41 | redLED = 0; |
| noutram | 0:8c84f2a81909 | 42 | yellowLED = 0; |
| noutram | 0:8c84f2a81909 | 43 | greenLED = 1; |
| noutram | 0:8c84f2a81909 | 44 | wait(1.0); |
| noutram | 0:8c84f2a81909 | 45 | |
| noutram | 0:8c84f2a81909 | 46 | //STATE 4 (A) |
| noutram | 0:8c84f2a81909 | 47 | yellowLED = 1; |
| noutram | 0:8c84f2a81909 | 48 | greenLED = 0; |
| noutram | 0:8c84f2a81909 | 49 | wait(1.0); |
| noutram | 0:8c84f2a81909 | 50 | } |
| noutram | 0:8c84f2a81909 | 51 | } |