flow_bridge.h

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#ifndef FLOW_BRIDGE_H
#define FLOW_BRIDGE_H
 
#include <stdint.h>
#include "sensor_bus.h"
 
#define FLOW_BRIDGE_ADDR_7BIT  0x3Bu
#define FLOW_BRIDGE_WHO_AM_I   0xF1u
#define FLOW_REG_WHO_AM_I      0x00u
#define FLOW_REG_VERSION       0x01u
#define FLOW_REG_FRAME         0x02u
#define FLOW_FRAME_LEN         11u
#define FLOW_REG_CTRL          0x10u
 
#define FLOW_ST_SENSOR_OK      0x01u
#define FLOW_ST_NEW            0x02u
#define FLOW_ST_OVERFLOW       0x04u
#define FLOW_ST_REJECTED       0x08u
 
typedef struct {
    sensor_bus_t bus;
    uint8_t      version;
    uint8_t      ok;
} flow_t;
 
typedef struct {
    uint8_t  status, count, squal;
    int16_t  dx, dy;
    uint16_t shutter;
    float    dt_s;
} flow_frame_t;
 
int32_t flow_init(flow_t *f, const sensor_bus_t *bus);           
int32_t flow_read(flow_t *f, flow_frame_t *fr);                 
void    flow_decode(const uint8_t raw[FLOW_FRAME_LEN], flow_frame_t *fr);
 
#endif /* FLOW_BRIDGE_H */