Struct ble_gatt_chr_def 

#[repr(C)]
pub struct ble_gatt_chr_def {
    pub uuid: *const ble_uuid_t,
    pub access_cb: Option<unsafe extern "C" fn(u16, u16, *mut ble_gatt_access_ctxt, *mut c_void) -> i32>,
    pub arg: *mut c_void,
    pub descriptors: *mut ble_gatt_dsc_def,
    pub flags: u32,
    pub min_key_size: u8,
    pub val_handle: *mut u16,
    pub cpfd: *mut ble_gatt_cpfd,
}

Represents the definition of a GATT characteristic.

Fields

uuid: *const ble_uuid_t

Pointer to characteristic UUID; use BLE_UUIDxx_DECLARE macros to declare proper UUID; NULL if there are no more characteristics in the service.

access_cb: Option<unsafe extern "C" fn(u16, u16, *mut ble_gatt_access_ctxt, *mut c_void) -> i32>

Callback that gets executed when this characteristic is read or written.

arg: *mut c_void

Optional argument for callback.

descriptors: *mut ble_gatt_dsc_def

Array of this characteristic’s descriptors. NULL if no descriptors. Do not include CCCD; it gets added automatically if this characteristic’s notify or indicate flag is set.

flags: u32

Specifies the set of permitted operations for this characteristic.

min_key_size: u8

Specifies minimum required key size to access this characteristic.

val_handle: *mut u16

At registration time, this is filled in with the characteristic’s value attribute handle.

The attribute handle for CCCD is val_handle + 1

cpfd: *mut ble_gatt_cpfd

Client Presentation Format Descriptors

Trait Implementations

impl Clone for ble_gatt_chr_def

fn clone(&self) -> ble_gatt_chr_def

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for ble_gatt_chr_def

impl Debug for ble_gatt_chr_def

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Default for ble_gatt_chr_def

fn default() -> ble_gatt_chr_def

Returns the “default value” for a type.