84 lines
2.4 KiB
Go
84 lines
2.4 KiB
Go
//go:build (softdevice && s113v7) || (softdevice && s132v6) || (softdevice && s140v6) || (softdevice && s140v7)
|
|
// +build softdevice,s113v7 softdevice,s132v6 softdevice,s140v6 softdevice,s140v7
|
|
|
|
package bluetooth
|
|
|
|
import (
|
|
"runtime/volatile"
|
|
"time"
|
|
)
|
|
|
|
/*
|
|
// Define SoftDevice functions as regular function declarations (not inline
|
|
// static functions).
|
|
#define SVCALL_AS_NORMAL_FUNCTION
|
|
|
|
#include "ble_gap.h"
|
|
*/
|
|
import "C"
|
|
|
|
// Address contains a Bluetooth MAC address.
|
|
type Address struct {
|
|
MACAddress
|
|
}
|
|
|
|
// Advertisement encapsulates a single advertisement instance.
|
|
type Advertisement struct {
|
|
handle uint8
|
|
isAdvertising volatile.Register8
|
|
payload rawAdvertisementPayload
|
|
}
|
|
|
|
// The nrf528xx devices only seem to support one advertisement instance. The way
|
|
// multiple advertisements are implemented is by changing the packet data
|
|
// frequently.
|
|
var defaultAdvertisement = Advertisement{
|
|
handle: C.BLE_GAP_ADV_SET_HANDLE_NOT_SET,
|
|
}
|
|
|
|
// DefaultAdvertisement returns the default advertisement instance but does not
|
|
// configure it.
|
|
func (a *Adapter) DefaultAdvertisement() *Advertisement {
|
|
return &defaultAdvertisement
|
|
}
|
|
|
|
// Configure this advertisement.
|
|
func (a *Advertisement) Configure(options AdvertisementOptions) error {
|
|
// Fill empty options with reasonable defaults.
|
|
if options.Interval == 0 {
|
|
// Pick an advertisement interval recommended by Apple (section 35.5
|
|
// Advertising Interval):
|
|
// https://developer.apple.com/accessories/Accessory-Design-Guidelines.pdf
|
|
options.Interval = NewDuration(152500 * time.Microsecond) // 152.5ms
|
|
}
|
|
|
|
// Construct payload.
|
|
// Note that the payload needs to be part of the Advertisement object as the
|
|
// memory is still used after sd_ble_gap_adv_set_configure returns.
|
|
a.payload.reset()
|
|
if !a.payload.addFromOptions(options) {
|
|
return errAdvertisementPacketTooBig
|
|
}
|
|
|
|
data := C.ble_gap_adv_data_t{}
|
|
data.adv_data = C.ble_data_t{
|
|
p_data: &a.payload.data[0],
|
|
len: uint16(a.payload.len),
|
|
}
|
|
params := C.ble_gap_adv_params_t{
|
|
properties: C.ble_gap_adv_properties_t{
|
|
_type: C.BLE_GAP_ADV_TYPE_CONNECTABLE_SCANNABLE_UNDIRECTED,
|
|
},
|
|
interval: uint32(options.Interval),
|
|
}
|
|
errCode := C.sd_ble_gap_adv_set_configure(&a.handle, &data, ¶ms)
|
|
return makeError(errCode)
|
|
}
|
|
|
|
// Start advertisement. May only be called after it has been configured.
|
|
func (a *Advertisement) Start() error {
|
|
a.isAdvertising.Set(1)
|
|
errCode := C.sd_ble_gap_adv_start(a.handle, C.BLE_CONN_CFG_TAG_DEFAULT)
|
|
return makeError(errCode)
|
|
}
|