Diff: SensorBar.h

Revision:

0:c1d649c7b904

Child:

1:3a86ce26147b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SensorBar.h	Fri Aug 31 02:52:24 2018 +0000
@@ -0,0 +1,96 @@
+#ifndef SENSORBAR_H
+#define SENSORBAR_H
+
+#include "mbed.h"
+#include "stdint.h"
+
+#define RECEIVE_TIMEOUT_VALUE 1000  // Timeout for I2C receive
+
+// These are used for setting LED driver to linear or log mode:
+#define LINEAR      0
+#define LOGARITHMIC 1
+
+// These are used for clock config:
+#define INTERNAL_CLOCK  2
+#define EXTERNAL_CLOCK  1
+
+class SensorBar
+{
+  public:
+    //New functions for bar specific operation
+    SensorBar(I2C *i2c, uint8_t address, uint8_t resetPin = 255, uint8_t interruptPin = 255, uint8_t oscillatorPin = 255 );
+    uint8_t begin( void );
+    uint8_t getRaw( void );
+    int8_t getPosition( void );
+    uint8_t getDensity( void );
+    void setBarStrobe( void );
+    void clearBarStrobe( void );
+    void setInvertBits( void ); //Dark (no reflection) = 1, position returns center of dark
+    void clearInvertBits( void ); //Light (reflection) = 1, position returns center of light
+
+    //Functions pulled from the SX1509 driver
+    void reset( void );
+    void debounceConfig( uint8_t configValue );
+    void debounceEnable( uint8_t pin );
+    void enableInterrupt( uint8_t pin, uint8_t riseFall );
+    unsigned int interruptSource( void );
+    void configClock( uint8_t oscSource = 2, uint8_t oscPinFunction = 0, uint8_t oscFreqOut = 0, uint8_t oscDivider = 1 );
+
+
+  private:
+    //Holding variables
+    uint8_t lastBarRawValue;
+    uint8_t lastBarPositionValue;
+    
+    //Settings
+    uint8_t deviceAddress; // I2C Address of SX1509
+    uint8_t barStrobe; // 0 = always on, 1 = power saving by IR LED strobe
+    uint8_t invertBits; // 1 = invert
+
+    // Pin definitions:
+    uint8_t pinInterrupt;
+    uint8_t pinOscillator;
+    uint8_t pinReset;
+
+    // Read Functions:
+    void scan( void );
+    uint8_t readByte(uint8_t registerAddress);
+    unsigned int readWord(uint8_t registerAddress);
+    void readBytes(uint8_t firstRegisterAddress, char * destination, uint8_t length);
+    // Write functions:
+    void writeByte(uint8_t registerAddress, uint8_t writeValue);
+    void writeWord(uint8_t registerAddress, unsigned int writeValue);
+    void writeBytes(uint8_t firstRegisterAddress, uint8_t * writeArray, uint8_t length);
+    
+    I2C *_i2c;
+};
+
+//****************************************************************************//
+//
+//  Circular Buffer
+//
+//****************************************************************************//
+
+//Class CircularBuffer is int16_t
+//Does not care about over-running real data ( if request is outside length's bounds ).
+//For example, the underlying machine writes [48], [49], [0], [1] ... 
+
+namespace name
+{
+class CircularBuffer
+{
+public:
+    CircularBuffer( uint16_t inputSize );
+    ~CircularBuffer();
+    int16_t getElement( uint16_t ); //zero is the push location
+    void pushElement( int16_t );
+    int16_t averageLast( uint16_t );
+    uint16_t recordLength( void );
+private:
+    uint16_t cBufferSize;
+    int16_t *cBufferData;
+    int16_t cBufferLastPtr;
+    uint8_t cBufferElementsUsed;
+};
+}
+#endif // SENSORBAR_H