Adding Home support to base class

[knro]

Since several mounts support Homing controls. This PR moves the responsibility of defining available homing operations to the INDI::Telescope class. Three operations are currently supported and any combination of the three can be set by the concrete class:

• Find: Command mount to search for home axis indexes.
• Set: Accept current position as the new home position.
• Go: Slew to home position.

Both Find and Go are transient operations so the driver must set the status of HomeSP to OK and must also reset all members of the switch property.

[pawel-soja]

I added HOME_SET. Where did the buttons go?

[pawel-soja]

There is one more call in the code and it overwrites homeCapability to 0

indi/drivers/telescope/lx200am5.cpp

Lines 80 to 81 in 2be3539

	if (mountType == Equatorial)
	SetTelescopeCapability(GetTelescopeCapability() | TELESCOPE_HAS_PIER_SIDE, SLEW_MODES);

[pawel-soja]

To check compatibility, the argument should not have the default value of 0.

void SetTelescopeCapability(uint32_t cap, uint8_t slewRateCount, uint8_t homeCapability = 0);

Why don't you want to add these options to a 32-bit variable? There's still some space :)

enum
{
    TELESCOPE_CAN_GOTO                    = 1 << 0,  /** Can the telescope go to to specific coordinates? */
    TELESCOPE_CAN_SYNC                    = 1 << 1,  /** Can the telescope sync to specific coordinates? */
    TELESCOPE_CAN_PARK                    = 1 << 2,  /** Can the telescope park? */
    TELESCOPE_CAN_ABORT                   = 1 << 3,  /** Can the telescope abort motion? */
    TELESCOPE_HAS_TIME                    = 1 << 4,  /** Does the telescope have configurable date and time settings? */
    TELESCOPE_HAS_LOCATION                = 1 << 5,  /** Does the telescope have configuration location settings? */
    TELESCOPE_HAS_PIER_SIDE               = 1 << 6,  /** Does the telescope have pier side property? */
    TELESCOPE_HAS_PEC                     = 1 << 7,  /** Does the telescope have PEC playback? */
    TELESCOPE_HAS_TRACK_MODE              = 1 << 8,  /** Does the telescope have track modes (sidereal, lunar, solar..etc)? */
    TELESCOPE_CAN_CONTROL_TRACK           = 1 << 9,  /** Can the telescope engage and disengage tracking? */
    TELESCOPE_HAS_TRACK_RATE              = 1 << 10, /** Does the telescope have custom track rates? */
    TELESCOPE_HAS_PIER_SIDE_SIMULATION    = 1 << 11, /** Does the telescope simulate the pier side property? */
    TELESCOPE_CAN_TRACK_SATELLITE         = 1 << 12, /** Can the telescope track satellites? */
    TELESCOPE_CAN_FLIP                    = 1 << 13, /** Does the telescope have a command for flipping? */

    TELESCOPE_HOME_FIND                   = 1 << 14,     /*!< Mount can search for home position  */
    TELESCOPE_HOME_SET                    = 1 << 15,     /*!< Mount can use current-position as home position */
    TELESCOPE_HOME_GO                     = 1 << 16,     /*!< Mount can slew to home position */
} TelescopeCapability;

[knro]

Thank you for the suggestion, I'll make the necessary changes tomorrow.