Merge pull request #23 from millercommamatt/master

Add set PGA bypass method

Author: caternuson

Adafruit_NAU7802.cpp

@@ -337,6 +337,22 @@ bool Adafruit_NAU7802::setPGACap(bool enable) {
   return true;
 }
 
+/**************************************************************************/
+/*!
+    @brief Enable or disable optional PGA bypass.
+    @param enable Use true to enable or false to disable
+    @return False if any I2C error occurred
+*/
+/**************************************************************************/
+bool Adafruit_NAU7802::setPGABypass(bool enable) {
+  Adafruit_I2CRegister bypass_reg = Adafruit_I2CRegister(i2c_dev, NAU7802_PGA);
+  Adafruit_I2CRegisterBits bypass_set =
+      Adafruit_I2CRegisterBits(&bypass_reg, 1, 4); // # bits, bit_shift
+  if (!bypass_set.write(enable ? 1 : 0))
+    return false;
+  return true;
+}
+
 /**************************************************************************/
 /*!
     @brief  Perform the internal calibration procedure

Adafruit_NAU7802.h

@@ -93,6 +93,7 @@ class Adafruit_NAU7802 {
   bool setRate(NAU7802_SampleRate gain);
   NAU7802_SampleRate getRate(void);
   bool setPGACap(bool enable);
+  bool setPGABypass(bool enable);
   bool calibrate(NAU7802_Calibration mode);
 
 private: