Sam Walsh
Example of using the DS271 battery monitor on the ESP motor driver board using PC_12 as the OneWire interface (Any other GPIO can be used)
main.cpp@0:de50f9a71c22, 2019-03-04 (annotated)
- Committer:
- EmbeddedSam
- Date:
- Mon Mar 04 14:48:45 2019 +0000
- Revision:
- 0:de50f9a71c22
Initial Commit;
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| EmbeddedSam | 0:de50f9a71c22 | 1 | #include <mbed.h> |
| EmbeddedSam | 0:de50f9a71c22 | 2 | #include "OneWire_Methods.h" |
| EmbeddedSam | 0:de50f9a71c22 | 3 | #include "ds2781.h" |
| EmbeddedSam | 0:de50f9a71c22 | 4 | |
| EmbeddedSam | 0:de50f9a71c22 | 5 | Serial pc(USBTX, USBRX); |
| EmbeddedSam | 0:de50f9a71c22 | 6 | DigitalInOut one_wire_pin(PC_12); |
| EmbeddedSam | 0:de50f9a71c22 | 7 | int VoltageReading, CurrentReading; |
| EmbeddedSam | 0:de50f9a71c22 | 8 | float Voltage, Current; |
| EmbeddedSam | 0:de50f9a71c22 | 9 | |
| EmbeddedSam | 0:de50f9a71c22 | 10 | int main() { |
| EmbeddedSam | 0:de50f9a71c22 | 11 | |
| EmbeddedSam | 0:de50f9a71c22 | 12 | while(1) { |
| EmbeddedSam | 0:de50f9a71c22 | 13 | VoltageReading = ReadVoltage(); |
| EmbeddedSam | 0:de50f9a71c22 | 14 | Voltage = VoltageReading*0.00976; //Returns the voltage measured at the VIN input of the DS2781 * |
| EmbeddedSam | 0:de50f9a71c22 | 15 | * //in units of 9.76mV |
| EmbeddedSam | 0:de50f9a71c22 | 16 | CurrentReading = ReadCurrent(); |
| EmbeddedSam | 0:de50f9a71c22 | 17 | Current = CurrentReading/6400.0; //Returns the current measured through Rsns external to DS2781 in * |
| EmbeddedSam | 0:de50f9a71c22 | 18 | * //units of 1.5625uV/Rsns. Positive current indicates discharge |
| EmbeddedSam | 0:de50f9a71c22 | 19 | pc.printf("\n\rVoltage = %0.3f, Current= %0.3f", Voltage, Current); |
| EmbeddedSam | 0:de50f9a71c22 | 20 | } |
| EmbeddedSam | 0:de50f9a71c22 | 21 | } |