Merge pull request #26 from amitrao17/set_offset_and_read_ID

add capability to set offset and read ID registers

Adafruit_VL6180X.cpp

@@ -396,6 +396,36 @@ float Adafruit_VL6180X::readLux(uint8_t gain) {
   return lux;
 }
 
+/**************************************************************************/
+/*!
+    @brief  Set the offset
+    @param  offset Offset setting
+*/
+/**************************************************************************/
+
+void Adafruit_VL6180X::setOffset(uint8_t offset) {
+  // write the offset
+  write8(VL6180X_REG_SYSRANGE_PART_TO_PART_RANGE_OFFSET, offset);
+}
+
+/**************************************************************************/
+/*!
+    @brief  Get the 7 bytes of id
+    @param  id_ptr Pointer to array of id bytes
+*/
+/**************************************************************************/
+
+void Adafruit_VL6180X::getID(uint8_t *id_ptr) {
+
+  id_ptr[0] = read8(VL6180X_REG_IDENTIFICATION_MODEL_ID + 0);
+  id_ptr[1] = read8(VL6180X_REG_IDENTIFICATION_MODEL_ID + 1);
+  id_ptr[2] = read8(VL6180X_REG_IDENTIFICATION_MODEL_ID + 2);
+  id_ptr[3] = read8(VL6180X_REG_IDENTIFICATION_MODEL_ID + 3);
+  id_ptr[4] = read8(VL6180X_REG_IDENTIFICATION_MODEL_ID + 4);
+  id_ptr[6] = read8(VL6180X_REG_IDENTIFICATION_MODEL_ID + 6);
+  id_ptr[7] = read8(VL6180X_REG_IDENTIFICATION_MODEL_ID + 7);
+}
+
 /**************************************************************************/
 /*!
     @brief  I2C low level interfacing

Adafruit_VL6180X.h

@@ -33,6 +33,8 @@
 #define VL6180X_REG_SYSTEM_FRESH_OUT_OF_RESET 0x016
 ///! Trigger Ranging
 #define VL6180X_REG_SYSRANGE_START 0x018
+///! Part to part range offset
+#define VL6180X_REG_SYSRANGE_PART_TO_PART_RANGE_OFFSET 0x024
 ///! Trigger Lux Reading
 #define VL6180X_REG_SYSALS_START 0x038
 ///! Lux reading gain
@@ -95,6 +97,9 @@ class Adafruit_VL6180X {
   void stopRangeContinuous(void);
   // readRangeResult and isRangeComplete apply here is well
 
+  void setOffset(uint8_t offset);
+  void getID(uint8_t *id_ptr);
+
 private:
   Adafruit_I2CDevice *i2c_dev = NULL; ///< Pointer to I2C bus interface
   void loadSettings(void);