Libery for HX711 sensor. This is for measureing the weigth of the keg
Hx711.h
- Committer:
- gert_lauritsen
- Date:
- 2016-02-21
- Revision:
- 0:52c805a049c4
File content as of revision 0:52c805a049c4:
#ifndef HX711_h #define HX711_h //Translatet module from arduino to mbed https://codebender.cc/library/HX711#HX711.h #include "mbed.h" class HX711 { private: DigitalOut _pin_slk; // Power Down and Serial Clock Input Pin DigitalIn _pin_dout; // Serial Data Output Pin char GAIN; // amplification factor long OFFSET; // used for tare weight float SCALE; // used to return weight in grams, kg, ounces, whatever public: // define clock and data pin, channel, and gain factor // channel selection is made by passing the appropriate gain: 128 or 64 for channel A, 32 for channel B // gain: 128 or 64 for channel A; channel B works with 32 gain factor only HX711(PinName pin_dout, PinName pin_slk); virtual ~HX711(); // check if HX711 is ready // from the datasheet: When output data is not ready for retrieval, digital output pin DOUT is high. Serial clock // input PD_SCK should be low. When DOUT goes to low, it indicates data is ready for retrieval. // set the gain factor; takes effect only after a call to read() // channel A can be set for a 128 or 64 gain; channel B has a fixed 32 gain // depending on the parameter, the channel is also set to either A or B void set_gain(char gain = 128); // waits for the chip to be ready and returns a reading long read(); // returns an average reading; times = how many times to read long read_average(char times = 10); // returns (read_average() - OFFSET), that is the current value without the tare weight; times = how many readings to do double get_value(char times = 1); // returns get_value() divided by SCALE, that is the raw value divided by a value obtained via calibration // times = how many readings to do float get_units(char times = 1); // set the OFFSET value for tare weight; times = how many times to read the tare value void tare(char times = 10); // set the SCALE value; this value is used to convert the raw data to "human readable" data (measure units) void set_scale(float scale = 1.f); // set OFFSET, the value that's subtracted from the actual reading (tare weight) void set_offset(long offset = 0); // puts the chip into power down mode void power_down(); // wakes up the chip after power down mode void power_up(); }; #endif /* HX711_h */