Diff: Hx711.h

Revision:

0:52c805a049c4

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Hx711.h	Sun Feb 21 11:01:00 2016 +0000
@@ -0,0 +1,62 @@
+#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 */
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