m b
/
ACS712HelloWorldDemo
Demo of the ACS712 Library
Fork of ece4180_lab4_ACS712 by
ACS712.h@1:4f9effb20c29, 2016-03-13 (annotated)
- Committer:
- nyengele
- Date:
- Sun Mar 13 16:43:23 2016 +0000
- Revision:
- 1:4f9effb20c29
- Parent:
- 0:a35011a2fdaa
- Child:
- 2:2b5233355986
updated device class, fixed a few bugs
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
mikeb | 0:a35011a2fdaa | 1 | #include <mbed.h> |
mikeb | 0:a35011a2fdaa | 2 | |
mikeb | 0:a35011a2fdaa | 3 | class ACS712 { |
mikeb | 0:a35011a2fdaa | 4 | |
mikeb | 0:a35011a2fdaa | 5 | public: |
mikeb | 0:a35011a2fdaa | 6 | ACS712(PinName _pin, float voltDivRatio = 1, short type = 5); |
mikeb | 0:a35011a2fdaa | 7 | |
mikeb | 0:a35011a2fdaa | 8 | float read(); |
mikeb | 0:a35011a2fdaa | 9 | float operator=(ACS712&); |
nyengele | 1:4f9effb20c29 | 10 | operator float() { return read(); } |
mikeb | 0:a35011a2fdaa | 11 | |
mikeb | 0:a35011a2fdaa | 12 | private: |
mikeb | 0:a35011a2fdaa | 13 | AnalogIn sensor; |
mikeb | 0:a35011a2fdaa | 14 | float translate(float); |
mikeb | 0:a35011a2fdaa | 15 | float ratio; |
mikeb | 0:a35011a2fdaa | 16 | short type; |
mikeb | 0:a35011a2fdaa | 17 | |
mikeb | 0:a35011a2fdaa | 18 | }; |
mikeb | 0:a35011a2fdaa | 19 | |
mikeb | 0:a35011a2fdaa | 20 | ACS712::ACS712(PinName _pin, float voltDivRatio, short type) : sensor(_pin){ |
mikeb | 0:a35011a2fdaa | 21 | ratio = voltDivRatio; |
mikeb | 0:a35011a2fdaa | 22 | type = type; |
mikeb | 0:a35011a2fdaa | 23 | } |
mikeb | 0:a35011a2fdaa | 24 | |
mikeb | 0:a35011a2fdaa | 25 | float ACS712::translate(float val){ |
mikeb | 0:a35011a2fdaa | 26 | switch(type){ |
mikeb | 0:a35011a2fdaa | 27 | case 5: |
mikeb | 0:a35011a2fdaa | 28 | return (val*ratio - 2.5*ratio)/(.185*ratio); |
mikeb | 0:a35011a2fdaa | 29 | break; |
mikeb | 0:a35011a2fdaa | 30 | case 20: |
mikeb | 0:a35011a2fdaa | 31 | return (val*ratio - 2.5*ratio)/(.1*ratio); |
mikeb | 0:a35011a2fdaa | 32 | break; |
mikeb | 0:a35011a2fdaa | 33 | case 30: |
mikeb | 0:a35011a2fdaa | 34 | return (val*ratio - 2.5*ratio)/(.066*ratio); |
mikeb | 0:a35011a2fdaa | 35 | break; |
mikeb | 0:a35011a2fdaa | 36 | default: |
mikeb | 0:a35011a2fdaa | 37 | return 999; |
mikeb | 0:a35011a2fdaa | 38 | break; |
mikeb | 0:a35011a2fdaa | 39 | |
mikeb | 0:a35011a2fdaa | 40 | } |
mikeb | 0:a35011a2fdaa | 41 | } |
mikeb | 0:a35011a2fdaa | 42 | |
mikeb | 0:a35011a2fdaa | 43 | |
mikeb | 0:a35011a2fdaa | 44 | float ACS712::read(){ |
nyengele | 1:4f9effb20c29 | 45 | return ACS712::translate(sensor * 3.3); |
mikeb | 0:a35011a2fdaa | 46 | } |
mikeb | 0:a35011a2fdaa | 47 | |
nyengele | 1:4f9effb20c29 | 48 | ACS712& ACS712::operator=(ACS712& rhs){ |
nyengele | 1:4f9effb20c29 | 49 | sensor = rhs.sensor; |
nyengele | 1:4f9effb20c29 | 50 | ratio = rhs.ratio; |
nyengele | 1:4f9effb20c29 | 51 | type = rhs.type; |
nyengele | 1:4f9effb20c29 | 52 | return this; |
mikeb | 0:a35011a2fdaa | 53 | } |