GAD sdk python wrapper does not support NEU

[BazKhondkar-design]

The SDK document talks about NEU but the python wrapper does not support its functionality. Also firmware does not support NED.

What needs to be done for the GAD sdk:

1) Change the enum to the correct type:

typedef enum
{
   VEL_SYS_VOID,
   VEL_SYS_NED,             /** North East Down */
   VEL_SYS_ODO,             /** Aiding source frame - x/y/z */
   VEL_SYS_LOCAL            /** User defined right-handed local coordinate system - x/y/z */
} VEL_SYS_TYPE

Above enum is incorrect and its need to be in the same as the firmware.

typedef enum
{
   VEL_SYS_VOID,
   VEL_SYS_NEU,             // North East Upwards
   VEL_SYS_ODO,             // Aiding source frame - x/y/z
   VEL_SYS_LOCAL            // User defined right-handed local coordinate system - x/y/z
} VEL_SYS_TYPE;

Also the function call need to be vel_neu and not vel_ned

[smcca-oxts]

NEU is a relic from previous versions, now included as NED since this is more consistent with our right-handed conventions around frames. The functionality is fundamentally the same, just with a flipped axis.