ardupilot/libraries/AP_OpticalFlow/AP_OpticalFlow_ADNS3080.h

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#ifndef __AP_OPTICALFLOW_ADNS3080_H__
#define __AP_OPTICALFLOW_ADNS3080_H__
#include <AP_HAL.h>
#include "AP_OpticalFlow.h"
// timer process runs at 1khz. 50 iterations = 20hz
#define AP_OPTICALFLOW_ADNS3080_NUM_CALLS_FOR_20HZ 50
// orientations for ADNS3080 sensor
#define AP_OPTICALFLOW_ADNS3080_PINS_FORWARD ROTATION_YAW_180
#define AP_OPTICALFLOW_ADNS3080_PINS_FORWARD_RIGHT ROTATION_YAW_135
#define AP_OPTICALFLOW_ADNS3080_PINS_RIGHT ROTATION_YAW_90
#define AP_OPTICALFLOW_ADNS3080_PINS_BACK_RIGHT ROTATION_YAW_45
#define AP_OPTICALFLOW_ADNS3080_PINS_BACK ROTATION_NONE
#define AP_OPTICALFLOW_ADNS3080_PINS_BACK_LEFT ROTATION_YAW_315
#define AP_OPTICALFLOW_ADNS3080_PINS_LEFT ROTATION_YAW_270
#define AP_OPTICALFLOW_ADNS3080_PINS_FORWARD_LEFT ROTATION_YAW_225
// field of view of ADNS3080 sensor lenses
#define AP_OPTICALFLOW_ADNS3080_08_FOV 0.202458f // 11.6 degrees
// scaler - value returned when sensor is moved equivalent of 1 pixel
#define AP_OPTICALFLOW_ADNS3080_SCALER_400 1.1f // when resolution set to 400
#define AP_OPTICALFLOW_ADNS3080_SCALER_1600 4.4f // when resolution set to 1600
// ADNS3080 hardware config
#define ADNS3080_PIXELS_X 30
#define ADNS3080_PIXELS_Y 30
#define ADNS3080_CLOCK_SPEED 24000000
// Register Map for the ADNS3080 Optical OpticalFlow Sensor
#define ADNS3080_PRODUCT_ID 0x00
#define ADNS3080_REVISION_ID 0x01
#define ADNS3080_MOTION 0x02
#define ADNS3080_DELTA_X 0x03
#define ADNS3080_DELTA_Y 0x04
#define ADNS3080_SQUAL 0x05
#define ADNS3080_PIXEL_SUM 0x06
#define ADNS3080_MAXIMUM_PIXEL 0x07
#define ADNS3080_CONFIGURATION_BITS 0x0a
#define ADNS3080_EXTENDED_CONFIG 0x0b
#define ADNS3080_DATA_OUT_LOWER 0x0c
#define ADNS3080_DATA_OUT_UPPER 0x0d
#define ADNS3080_SHUTTER_LOWER 0x0e
#define ADNS3080_SHUTTER_UPPER 0x0f
#define ADNS3080_FRAME_PERIOD_LOWER 0x10
#define ADNS3080_FRAME_PERIOD_UPPER 0x11
#define ADNS3080_MOTION_CLEAR 0x12
#define ADNS3080_FRAME_CAPTURE 0x13
#define ADNS3080_SROM_ENABLE 0x14
#define ADNS3080_FRAME_PERIOD_MAX_BOUND_LOWER 0x19
#define ADNS3080_FRAME_PERIOD_MAX_BOUND_UPPER 0x1a
#define ADNS3080_FRAME_PERIOD_MIN_BOUND_LOWER 0x1b
#define ADNS3080_FRAME_PERIOD_MIN_BOUND_UPPER 0x1c
#define ADNS3080_SHUTTER_MAX_BOUND_LOWER 0x1e
#define ADNS3080_SHUTTER_MAX_BOUND_UPPER 0x1e
#define ADNS3080_SROM_ID 0x1f
#define ADNS3080_OBSERVATION 0x3d
#define ADNS3080_INVERSE_PRODUCT_ID 0x3f
#define ADNS3080_PIXEL_BURST 0x40
#define ADNS3080_MOTION_BURST 0x50
#define ADNS3080_SROM_LOAD 0x60
// Extended Configuration bits
#define ADNS3080_SERIALNPU_OFF 0x02
class AP_OpticalFlow_ADNS3080 : public AP_OpticalFlow
{
public:
// constructor
AP_OpticalFlow_ADNS3080();
// initialise the sensor
void init();
// read latest values from sensor and fill in x,y and totals,
// returns true on successful read
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void update(void);
// ADNS3080 specific features
// called by timer process to read sensor data
void read();
uint8_t read_register(uint8_t address);
void write_register(uint8_t address, uint8_t value);
// will cause the x,y, dx, dy, and the sensor's motion registers to
// be cleared
void clear_motion();
// print_pixel_data - dumps a 30x30 image to the Serial port
void print_pixel_data();
private:
// update conversion factors based on field of view
void update_conversion_factors();
uint8_t _num_calls; // used to throttle read down to 20hz
// SPI device
AP_HAL::SPIDeviceDriver *_spi;
};
#endif