University of Plymouth - Stages 1, 2 and 3
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Task422Solution
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Task422Solution
by 
Nicholas Outram
main.cpp@0:6d9e82b27127, 2015-09-24 (annotated)
- Committer:
- noutram
- Date:
- Thu Sep 24 12:29:49 2015 +0000
- Revision:
- 0:6d9e82b27127
Initial version 24-09-2015
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| noutram | 0:6d9e82b27127 | 1 | #include "mbed.h" |
| noutram | 0:6d9e82b27127 | 2 | |
| noutram | 0:6d9e82b27127 | 3 | #define kRED (1 << 2) //4 |
| noutram | 0:6d9e82b27127 | 4 | #define kYELLOW (1 << 1) //2 |
| noutram | 0:6d9e82b27127 | 5 | #define kGREEN (1 << 0) //1 |
| noutram | 0:6d9e82b27127 | 6 | |
| noutram | 0:6d9e82b27127 | 7 | //Global objects |
| noutram | 0:6d9e82b27127 | 8 | BusOut binaryOutput(D5, D6, D7); |
| noutram | 0:6d9e82b27127 | 9 | DigitalIn SW1(D3); |
| noutram | 0:6d9e82b27127 | 10 | DigitalIn SW2(D4); |
| noutram | 0:6d9e82b27127 | 11 | |
| noutram | 0:6d9e82b27127 | 12 | AnalogIn POT_ADC_In(A0); |
| noutram | 0:6d9e82b27127 | 13 | AnalogIn LDD_ADC_In(A1); |
| noutram | 0:6d9e82b27127 | 14 | float fPOT, fLDR = 0.0; |
| noutram | 0:6d9e82b27127 | 15 | |
| noutram | 0:6d9e82b27127 | 16 | //Main function |
| noutram | 0:6d9e82b27127 | 17 | int main() { |
| noutram | 0:6d9e82b27127 | 18 | |
| noutram | 0:6d9e82b27127 | 19 | while(1) { |
| noutram | 0:6d9e82b27127 | 20 | unsigned op = 0u; |
| noutram | 0:6d9e82b27127 | 21 | |
| noutram | 0:6d9e82b27127 | 22 | //Read ADC |
| noutram | 0:6d9e82b27127 | 23 | fPOT = POT_ADC_In; //Threshold |
| noutram | 0:6d9e82b27127 | 24 | fLDR = LDD_ADC_In; //Light reading |
| noutram | 0:6d9e82b27127 | 25 | |
| noutram | 0:6d9e82b27127 | 26 | //Write to terminal |
| noutram | 0:6d9e82b27127 | 27 | printf("POT = %6.4f\tLDR = %6.4f\n", fPOT, fLDR); |
| noutram | 0:6d9e82b27127 | 28 | |
| noutram | 0:6d9e82b27127 | 29 | if (fLDR < 0.1f) { |
| noutram | 0:6d9e82b27127 | 30 | op = kRED | kYELLOW | kGREEN; |
| noutram | 0:6d9e82b27127 | 31 | } else if (fLDR < 0.15f) { |
| noutram | 0:6d9e82b27127 | 32 | op = kYELLOW | kRED; |
| noutram | 0:6d9e82b27127 | 33 | } else if (fLDR < 0.2f) { |
| noutram | 0:6d9e82b27127 | 34 | op = kRED; |
| noutram | 0:6d9e82b27127 | 35 | } else { |
| noutram | 0:6d9e82b27127 | 36 | op = 0; |
| noutram | 0:6d9e82b27127 | 37 | } |
| noutram | 0:6d9e82b27127 | 38 | |
| noutram | 0:6d9e82b27127 | 39 | //Write to port |
| noutram | 0:6d9e82b27127 | 40 | binaryOutput = op; |
| noutram | 0:6d9e82b27127 | 41 | |
| noutram | 0:6d9e82b27127 | 42 | //Wait |
| noutram | 0:6d9e82b27127 | 43 | wait(0.1); |
| noutram | 0:6d9e82b27127 | 44 | |
| noutram | 0:6d9e82b27127 | 45 | } //end while(1) |
| noutram | 0:6d9e82b27127 | 46 | } //end main |