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adapter_nrf528xx-peripheral.go
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adapter_nrf528xx-peripheral.go
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//go:build softdevice && s113v7
package bluetooth
// This file implements the event handler for SoftDevices with only peripheral
// mode support. This includes the S113.
/*
#include "nrf_sdm.h"
#include "nrf_nvic.h"
#include "ble.h"
#include "ble_gap.h"
*/
import "C"
import (
"unsafe"
)
func handleEvent() {
id := eventBuf.header.evt_id
switch {
case id >= C.BLE_GAP_EVT_BASE && id <= C.BLE_GAP_EVT_LAST:
gapEvent := eventBuf.evt.unionfield_gap_evt()
switch id {
case C.BLE_GAP_EVT_CONNECTED:
if debug {
println("evt: connected in peripheral role")
}
currentConnection.handle.Reg = uint16(gapEvent.conn_handle)
connectEvent := gapEvent.params.unionfield_connected()
device := Device{
Address: Address{makeMACAddress(connectEvent.peer_addr)},
connectionHandle: gapEvent.conn_handle,
}
DefaultAdapter.connectHandler(device, true)
case C.BLE_GAP_EVT_DISCONNECTED:
if debug {
println("evt: disconnected")
}
currentConnection.handle.Reg = C.BLE_CONN_HANDLE_INVALID
// Auto-restart advertisement if needed.
if defaultAdvertisement.isAdvertising.Get() != 0 {
// The advertisement was running but was automatically stopped
// by the connection event.
// Note that it cannot be restarted during connect like this,
// because it would need to be reconfigured as a non-connectable
// advertisement. That's left as a future addition, if
// necessary.
C.sd_ble_gap_adv_start(defaultAdvertisement.handle, C.BLE_CONN_CFG_TAG_DEFAULT)
}
device := Device{
connectionHandle: gapEvent.conn_handle,
}
DefaultAdapter.connectHandler(device, false)
case C.BLE_GAP_EVT_DATA_LENGTH_UPDATE_REQUEST:
// We need to respond with sd_ble_gap_data_length_update. Setting
// both parameters to nil will make sure we send the default values.
C.sd_ble_gap_data_length_update(gapEvent.conn_handle, nil, nil)
case C.BLE_GAP_EVT_DATA_LENGTH_UPDATE:
// ignore confirmation of data length successfully updated
case C.BLE_GAP_EVT_PHY_UPDATE_REQUEST:
phyUpdateRequest := gapEvent.params.unionfield_phy_update_request()
C.sd_ble_gap_phy_update(gapEvent.conn_handle, &phyUpdateRequest.peer_preferred_phys)
case C.BLE_GAP_EVT_PHY_UPDATE:
// ignore confirmation of phy successfully updated
default:
if debug {
println("unknown GAP event:", id)
}
}
case id >= C.BLE_GATTS_EVT_BASE && id <= C.BLE_GATTS_EVT_LAST:
gattsEvent := eventBuf.evt.unionfield_gatts_evt()
switch id {
case C.BLE_GATTS_EVT_WRITE:
writeEvent := gattsEvent.params.unionfield_write()
len := writeEvent.len - writeEvent.offset
data := (*[255]byte)(unsafe.Pointer(&writeEvent.data[0]))[:len:len]
handler := DefaultAdapter.getCharWriteHandler(writeEvent.handle)
if handler != nil {
handler.callback(Connection(gattsEvent.conn_handle), int(writeEvent.offset), data)
}
case C.BLE_GATTS_EVT_SYS_ATTR_MISSING:
// This event is generated when reading the Generic Attribute
// service. It appears to be necessary for bonded devices.
// From the docs:
// > If the pointer is NULL, the system attribute info is
// > initialized, assuming that the application does not have any
// > previously saved system attribute data for this device.
// Maybe we should look at the error, but as there's not really a
// way to handle it, ignore it.
C.sd_ble_gatts_sys_attr_set(gattsEvent.conn_handle, nil, 0, 0)
case C.BLE_GATTS_EVT_EXCHANGE_MTU_REQUEST:
// This event is generated by some devices. While we could support
// larger MTUs, this default MTU is supported everywhere.
C.sd_ble_gatts_exchange_mtu_reply(gattsEvent.conn_handle, C.BLE_GATT_ATT_MTU_DEFAULT)
case C.BLE_GATTS_EVT_HVN_TX_COMPLETE:
// ignore confirmation of a notification successfully sent
default:
if debug {
println("unknown GATTS event:", id, id-C.BLE_GATTS_EVT_BASE)
}
}
default:
if debug {
println("unknown event:", id)
}
}
}