void Bluetooth_HCITask(void)
{
switch (Bluetooth_HCIProcessingState)
{
case Bluetooth_ProcessEvents:
Pipe_SelectPipe(BLUETOOTH_EVENTS_PIPE);
Pipe_Unfreeze();
if (Pipe_IsReadWriteAllowed())
{
BT_HCIEvent_Header_t HCIEventHeader;
/* Read in the event header to fetch the event code and payload length */
Pipe_Read_Stream_LE(&HCIEventHeader, sizeof(HCIEventHeader));
/* Create a temporary buffer for the event parameters */
uint8_t EventParams[HCIEventHeader.ParameterLength];
/* Read in the event parameters into the temporary buffer */
Pipe_Read_Stream_LE(&EventParams, HCIEventHeader.ParameterLength);
Pipe_ClearIN();
switch (HCIEventHeader.EventCode)
{
case EVENT_COMMAND_COMPLETE:
Bluetooth_HCIProcessingState = Bluetooth_HCINextState;
break;
case EVENT_COMMAND_STATUS:
/* If the execution of a command failed, reset the stack */
if (((BT_HCIEvent_CommandStatus_t*)&EventParams)->Status)
Bluetooth_HCIProcessingState = Bluetooth_Init;
break;
case EVENT_CONNECTION_REQUEST:
/* Need to store the remote device's BT address in a temporary buffer for later use */
memcpy(Bluetooth_TempDeviceAddress,
&((BT_HCIEvent_ConnectionRequest_t*)&EventParams)->RemoteAddress,
sizeof(Bluetooth_TempDeviceAddress));
bool IsACLConnection = (((BT_HCIEvent_ConnectionRequest_t*)&EventParams)->LinkType == 0x01);
/* Only accept the connection if it is a ACL (data) connection, a device is not already connected
and the user application has indicated that the connection should be allowed */
Bluetooth_HCIProcessingState = (Bluetooth_Connection.IsConnected || !(IsACLConnection) ||
!(Bluetooth_ConnectionRequest(Bluetooth_TempDeviceAddress))) ?
Bluetooth_Conn_RejectConnection : Bluetooth_Conn_AcceptConnection;
break;
case EVENT_PIN_CODE_REQUEST:
/* Need to store the remote device's BT address in a temporary buffer for later use */
memcpy(Bluetooth_TempDeviceAddress,
&((BT_HCIEvent_PinCodeReq_t*)&EventParams)->RemoteAddress,
sizeof(Bluetooth_TempDeviceAddress));
Bluetooth_HCIProcessingState = Bluetooth_Conn_SendPINCode;
break;
case EVENT_CONNECTION_COMPLETE:
/* Need to store the remote device's BT address in a temporary buffer for later use */
memcpy(Bluetooth_Connection.RemoteAddress,
&((BT_HCIEvent_ConnectionComplete_t*)&EventParams)->RemoteAddress,
sizeof(Bluetooth_TempDeviceAddress));
/* Store the created connection handle and indicate that the connection has been established */
Bluetooth_Connection.ConnectionHandle = ((BT_HCIEvent_ConnectionComplete_t*)&EventParams)->ConnectionHandle;
Bluetooth_Connection.IsConnected = true;
Bluetooth_ConnectionComplete();
break;
case EVENT_DISCONNECTION_COMPLETE:
/* Device disconnected, indicate connection information no longer valid */
Bluetooth_Connection.IsConnected = false;
Bluetooth_DisconnectionComplete();
Bluetooth_HCIProcessingState = Bluetooth_Init;
break;
}
}
Pipe_Freeze();
break;
case Bluetooth_Init:
/* Reset the connection information structure to destroy any previous connection state */
memset(&Bluetooth_Connection, 0x00, sizeof(Bluetooth_Connection));
Bluetooth_HCIProcessingState = Bluetooth_Init_Reset;
break;
case Bluetooth_Init_Reset:
HCICommandHeader = (BT_HCICommand_Header_t)
{
OpCode: {OGF: OGF_CTRLR_BASEBAND, OCF: OCF_CTRLR_BASEBAND_RESET},
ParameterLength: 0,
};
/* Send the command to reset the bluetooth dongle controller */
Bluetooth_SendHCICommand(NULL, 0);
Bluetooth_HCINextState = Bluetooth_Init_SetLocalName;
Bluetooth_HCIProcessingState = Bluetooth_ProcessEvents;
break;
case Bluetooth_Init_SetLocalName:
HCICommandHeader = (BT_HCICommand_Header_t)
{
OpCode: {OGF: OGF_CTRLR_BASEBAND, OCF: OCF_CTRLR_BASEBAND_WRITE_LOCAL_NAME},
ParameterLength: 248,
};
/* Send the command to set the bluetooth dongle's name for other devices to see */
Bluetooth_SendHCICommand(Bluetooth_DeviceConfiguration.Name, strlen(Bluetooth_DeviceConfiguration.Name));
Bluetooth_HCINextState = Bluetooth_Init_SetDeviceClass;
Bluetooth_HCIProcessingState = Bluetooth_ProcessEvents;
break;
case Bluetooth_Init_SetDeviceClass:
HCICommandHeader = (BT_HCICommand_Header_t)
{
OpCode: {OGF: OGF_CTRLR_BASEBAND, OCF: OCF_CTRLR_BASEBAND_WRITE_CLASS_OF_DEVICE},
ParameterLength: 3,
};
/* Send the command to set the class of the device for other devices to see */
Bluetooth_SendHCICommand(&Bluetooth_DeviceConfiguration.Class, 3);
Bluetooth_HCINextState = Bluetooth_Init_WriteScanEnable;
Bluetooth_HCIProcessingState = Bluetooth_ProcessEvents;
break;
case Bluetooth_Init_WriteScanEnable:
HCICommandHeader = (BT_HCICommand_Header_t)
{
OpCode: {OGF: OGF_CTRLR_BASEBAND, OCF: OCF_CTRLR_BASEBAND_WRITE_SCAN_ENABLE},
ParameterLength: 1,
};
uint8_t Interval = BT_SCANMODE_InquiryAndPageScans;
/* Send the command to set the remote device scanning mode */
Bluetooth_SendHCICommand(&Interval, 1);
Bluetooth_HCINextState = Bluetooth_ProcessEvents;
Bluetooth_HCIProcessingState = Bluetooth_ProcessEvents;
break;
case Bluetooth_Conn_AcceptConnection:
HCICommandHeader = (BT_HCICommand_Header_t)
{
OpCode: {OGF: OGF_LINK_CONTROL, OCF: OCF_LINK_CONTROL_ACCEPT_CONNECTION_REQUEST},
ParameterLength: sizeof(BT_HCICommand_AcceptConnectionReq_t),
};
/* Copy over the temporary BT device address saved from the Connection Request event, indicate slave
connection role */
BT_HCICommand_AcceptConnectionReq_t AcceptConnectionParams;
memcpy(AcceptConnectionParams.RemoteAddress, Bluetooth_TempDeviceAddress,
sizeof(AcceptConnectionParams.RemoteAddress));
AcceptConnectionParams.SlaveRole = true;
/* Send the command to accept the remote connection request */
Bluetooth_SendHCICommand(&AcceptConnectionParams, sizeof(BT_HCICommand_AcceptConnectionReq_t));
Bluetooth_HCIProcessingState = Bluetooth_ProcessEvents;
break;
case Bluetooth_Conn_RejectConnection:
HCICommandHeader = (BT_HCICommand_Header_t)
{
OpCode: {OGF: OGF_LINK_CONTROL, OCF: OCF_LINK_CONTROL_REJECT_CONNECTION_REQUEST},
ParameterLength: sizeof(BT_HCICommand_RejectConnectionReq_t),
};
/* Copy over the temporary BT device address saved from the Connection Request event, indicate failure
to accept the connection due to limited device resources or incorrect device address */
BT_HCICommand_RejectConnectionReq_t RejectConnectionParams;
memcpy(RejectConnectionParams.RemoteAddress, Bluetooth_TempDeviceAddress, sizeof(RejectConnectionParams.RemoteAddress));
RejectConnectionParams.Reason = Bluetooth_Connection.IsConnected ? ERROR_LIMITED_RESOURCES : ERROR_UNACCEPTABLE_BDADDR;
/* Send the command to reject the remote connection request */
Bluetooth_SendHCICommand(&RejectConnectionParams, sizeof(BT_HCICommand_RejectConnectionReq_t));
Bluetooth_HCIProcessingState = Bluetooth_ProcessEvents;
break;
case Bluetooth_Conn_SendPINCode:
HCICommandHeader = (BT_HCICommand_Header_t)
{
OpCode: {OGF: OGF_LINK_CONTROL, OCF: OCF_LINK_CONTROL_PIN_CODE_REQUEST_REPLY},
ParameterLength: sizeof(BT_HCICommand_PinCodeResp_t),
};
/* Copy over the temporary BT device address saved from the PIN Code Request event, copy over the
local PIN authentication code to the response */
BT_HCICommand_PinCodeResp_t PINCodeRequestParams;
memcpy(PINCodeRequestParams.RemoteAddress, Bluetooth_TempDeviceAddress, sizeof(PINCodeRequestParams.RemoteAddress));
PINCodeRequestParams.PINCodeLength = strlen(Bluetooth_DeviceConfiguration.PINCode);
memcpy(PINCodeRequestParams.PINCode, Bluetooth_DeviceConfiguration.PINCode, sizeof(PINCodeRequestParams.PINCode));
/* Send the command to transmit the device's local PIN number for authentication */
Bluetooth_SendHCICommand(&PINCodeRequestParams, sizeof(BT_HCICommand_PinCodeResp_t));
Bluetooth_HCIProcessingState = Bluetooth_ProcessEvents;
break;
}
}
/** Bluetooth HCI processing task. This task should be called repeatedly the main Bluetooth
* stack task to manage the HCI processing state.
*/
void Bluetooth_HCITask(void)
{
BT_HCICommand_Header_t HCICommandHeader;
switch (Bluetooth_State.CurrentHCIState)
{
case Bluetooth_ProcessEvents:
Pipe_SelectPipe(BLUETOOTH_EVENTS_PIPE);
Pipe_Unfreeze();
if (Pipe_IsReadWriteAllowed())
{
BT_HCIEvent_Header_t HCIEventHeader;
/* Read in the event header to fetch the event code and payload length */
Pipe_Read_Stream_LE(&HCIEventHeader, sizeof(HCIEventHeader));
/* Create a temporary buffer for the event parameters */
uint8_t EventParams[HCIEventHeader.ParameterLength];
/* Read in the event parameters into the temporary buffer */
Pipe_Read_Stream_LE(&EventParams, HCIEventHeader.ParameterLength);
Pipe_ClearIN();
BT_HCI_DEBUG(1, "Event Received (0x%02X)", HCIEventHeader.EventCode);
switch (HCIEventHeader.EventCode)
{
case EVENT_COMMAND_COMPLETE:
BT_HCI_DEBUG(1, "<< Command Complete");
/* Check which operation was completed in case we need to process the even parameters */
switch (((BT_HCIEvent_CommandComplete_t*)&EventParams)->Opcode)
{
case (OGF_CTRLR_INFORMATIONAL | OCF_CTRLR_INFORMATIONAL_READBDADDR):
/* A READ BDADDR command completed, copy over the local device's BDADDR from the response */
memcpy(Bluetooth_State.LocalBDADDR,
&((BT_HCIEvent_CommandComplete_t*)&EventParams)->ReturnParams[1],
sizeof(Bluetooth_State.LocalBDADDR));
break;
}
Bluetooth_State.CurrentHCIState = Bluetooth_State.NextHCIState;
break;
case EVENT_COMMAND_STATUS:
BT_HCI_DEBUG(1, "<< Command Status");
BT_HCI_DEBUG(2, "-- Status Code: 0x%02X", (((BT_HCIEvent_CommandStatus_t*)&EventParams)->Status));
/* If the execution of a command failed, reset the stack */
if (((BT_HCIEvent_CommandStatus_t*)&EventParams)->Status)
Bluetooth_State.CurrentHCIState = Bluetooth_Init;
break;
case EVENT_CONNECTION_REQUEST:
BT_HCI_DEBUG(1, "<< Connection Request");
BT_HCI_DEBUG(2, "-- Link Type: 0x%02X", (((BT_HCIEvent_ConnectionRequest_t*)&EventParams)->LinkType));
/* Need to store the remote device's BT address in a temporary buffer for later use */
memcpy(Bluetooth_TempDeviceAddress,
&((BT_HCIEvent_ConnectionRequest_t*)&EventParams)->RemoteAddress,
sizeof(Bluetooth_TempDeviceAddress));
bool IsACLConnection = (((BT_HCIEvent_ConnectionRequest_t*)&EventParams)->LinkType == 0x01);
/* Only accept the connection if it is a ACL (data) connection, a device is not already connected
and the user application has indicated that the connection should be allowed */
Bluetooth_State.CurrentHCIState = (Bluetooth_Connection.IsConnected || !(IsACLConnection) ||
!(Bluetooth_ConnectionRequest(Bluetooth_TempDeviceAddress))) ?
Bluetooth_Conn_RejectConnection : Bluetooth_Conn_AcceptConnection;
BT_HCI_DEBUG(2, "-- Connection %S", (Bluetooth_State.CurrentHCIState == Bluetooth_Conn_RejectConnection) ?
PSTR("REJECTED") : PSTR("ACCEPTED"));
break;
case EVENT_PIN_CODE_REQUEST:
BT_HCI_DEBUG(1, "<< Pin Code Request");
/* Need to store the remote device's BT address in a temporary buffer for later use */
memcpy(Bluetooth_TempDeviceAddress,
&((BT_HCIEvent_PinCodeReq_t*)&EventParams)->RemoteAddress,
sizeof(Bluetooth_TempDeviceAddress));
Bluetooth_State.CurrentHCIState = Bluetooth_Conn_SendPINCode;
break;
case EVENT_LINK_KEY_REQUEST:
BT_HCI_DEBUG(1, "<< Link Key Request");
/* Need to store the remote device's BT address in a temporary buffer for later use */
memcpy(Bluetooth_TempDeviceAddress,
&((BT_HCIEvent_LinkKeyReq_t*)&EventParams)->RemoteAddress,
sizeof(Bluetooth_TempDeviceAddress));
Bluetooth_State.CurrentHCIState = Bluetooth_Conn_SendLinkKeyNAK;
break;
case EVENT_CONNECTION_COMPLETE:
BT_HCI_DEBUG(1, "<< Connection Complete");
BT_HCI_DEBUG(2, "-- Handle: 0x%04X", ((BT_HCIEvent_ConnectionComplete_t*)&EventParams)->ConnectionHandle);
/* Need to store the remote device's BT address in a temporary buffer for later use */
memcpy(Bluetooth_Connection.RemoteAddress,
&((BT_HCIEvent_ConnectionComplete_t*)&EventParams)->RemoteAddress,
sizeof(Bluetooth_TempDeviceAddress));
/* Store the created connection handle and indicate that the connection has been established */
Bluetooth_Connection.ConnectionHandle = ((BT_HCIEvent_ConnectionComplete_t*)&EventParams)->ConnectionHandle;
Bluetooth_Connection.IsConnected = true;
Bluetooth_ConnectionComplete();
break;
case EVENT_DISCONNECTION_COMPLETE:
BT_HCI_DEBUG(1, "<< Disconnection Complete");
/* Device disconnected, indicate connection information no longer valid */
Bluetooth_Connection.IsConnected = false;
Bluetooth_DisconnectionComplete();
break;
}
}
Pipe_Freeze();
break;
case Bluetooth_Init:
BT_HCI_DEBUG(1, "# Init");
Bluetooth_State.IsInitialized = false;
/* Reset the connection information structure to destroy any previous connection state */
memset(&Bluetooth_Connection, 0x00, sizeof(Bluetooth_Connection));
Bluetooth_State.CurrentHCIState = Bluetooth_Init_Reset;
break;
case Bluetooth_Init_Reset:
BT_HCI_DEBUG(1, "# Reset");
HCICommandHeader = (BT_HCICommand_Header_t)
{
OpCode: (OGF_CTRLR_BASEBAND | OCF_CTRLR_BASEBAND_RESET),
ParameterLength: 0,
};
/* Send the command to reset the Bluetooth dongle controller */
Bluetooth_SendHCICommand(&HCICommandHeader, NULL, 0);
Bluetooth_State.NextHCIState = Bluetooth_Init_ReadBufferSize;
Bluetooth_State.CurrentHCIState = Bluetooth_ProcessEvents;
break;
case Bluetooth_Init_ReadBufferSize:
BT_HCI_DEBUG(1, "# Read Buffer Size");
HCICommandHeader = (BT_HCICommand_Header_t)
{
OpCode: (OGF_CTRLR_INFORMATIONAL | OCF_CTRLR_INFORMATIONAL_READBUFFERSIZE),
ParameterLength: 0,
};
/* Send the command to read the Bluetooth buffer size (mandatory before device sends any data) */
Bluetooth_SendHCICommand(&HCICommandHeader, NULL, 0);
Bluetooth_State.NextHCIState = Bluetooth_Init_GetBDADDR;
Bluetooth_State.CurrentHCIState = Bluetooth_ProcessEvents;
break;
case Bluetooth_Init_GetBDADDR:
BT_HCI_DEBUG(1, "# Get BDADDR");
HCICommandHeader = (BT_HCICommand_Header_t)
{
OpCode: (OGF_CTRLR_INFORMATIONAL | OCF_CTRLR_INFORMATIONAL_READBDADDR),
ParameterLength: 0,
};
/* Send the command to retrieve the BDADDR of the inserted Bluetooth dongle */
Bluetooth_SendHCICommand(&HCICommandHeader, NULL, 0);
Bluetooth_State.NextHCIState = Bluetooth_Init_SetLocalName;
Bluetooth_State.CurrentHCIState = Bluetooth_ProcessEvents;
break;
case Bluetooth_Init_SetLocalName:
BT_HCI_DEBUG(1, "# Set Local Name");
HCICommandHeader = (BT_HCICommand_Header_t)
{
OpCode: (OGF_CTRLR_BASEBAND | OCF_CTRLR_BASEBAND_WRITE_LOCAL_NAME),
ParameterLength: 248,
};
/* Send the command to set the Bluetooth dongle's name for other devices to see */
Bluetooth_SendHCICommand(&HCICommandHeader, Bluetooth_DeviceConfiguration.Name, strlen(Bluetooth_DeviceConfiguration.Name));
Bluetooth_State.NextHCIState = Bluetooth_Init_SetDeviceClass;
Bluetooth_State.CurrentHCIState = Bluetooth_ProcessEvents;
break;
case Bluetooth_Init_SetDeviceClass:
BT_HCI_DEBUG(1, "# Set Device Class");
HCICommandHeader = (BT_HCICommand_Header_t)
{
OpCode: (OGF_CTRLR_BASEBAND | OCF_CTRLR_BASEBAND_WRITE_CLASS_OF_DEVICE),
ParameterLength: 3,
};
/* Send the command to set the class of the device for other devices to see */
Bluetooth_SendHCICommand(&HCICommandHeader, &Bluetooth_DeviceConfiguration.Class, 3);
Bluetooth_State.NextHCIState = Bluetooth_Init_WriteScanEnable;
Bluetooth_State.CurrentHCIState = Bluetooth_ProcessEvents;
break;
case Bluetooth_Init_WriteScanEnable:
BT_HCI_DEBUG(1, "# Write Scan Enable");
HCICommandHeader = (BT_HCICommand_Header_t)
{
OpCode: (OGF_CTRLR_BASEBAND | OCF_CTRLR_BASEBAND_WRITE_SCAN_ENABLE),
ParameterLength: 1,
};
uint8_t Interval = BT_SCANMODE_InquiryAndPageScans;
/* Send the command to set the remote device scanning mode */
Bluetooth_SendHCICommand(&HCICommandHeader, &Interval, 1);
Bluetooth_State.NextHCIState = Bluetooth_Init_FinalizeInit;
Bluetooth_State.CurrentHCIState = Bluetooth_ProcessEvents;
break;
case Bluetooth_Init_FinalizeInit:
Bluetooth_State.IsInitialized = true;
/* Fire the user application callback to indicate that the stack is now fully initialized */
Bluetooth_StackInitialized();
Bluetooth_State.NextHCIState = Bluetooth_ProcessEvents;
Bluetooth_State.CurrentHCIState = Bluetooth_ProcessEvents;
break;
case Bluetooth_Conn_AcceptConnection:
BT_HCI_DEBUG(1, "# Accept Connection");
HCICommandHeader = (BT_HCICommand_Header_t)
{
OpCode: (OGF_LINK_CONTROL | OCF_LINK_CONTROL_ACCEPT_CONNECTION_REQUEST),
ParameterLength: sizeof(BT_HCICommand_AcceptConnectionReq_t),
};
/* Copy over the temporary BT device address saved from the Connection Request event, indicate slave
connection role */
BT_HCICommand_AcceptConnectionReq_t AcceptConnectionParams;
memcpy(AcceptConnectionParams.RemoteAddress, Bluetooth_TempDeviceAddress,
sizeof(AcceptConnectionParams.RemoteAddress));
AcceptConnectionParams.SlaveRole = true;
/* Send the command to accept the remote connection request */
Bluetooth_SendHCICommand(&HCICommandHeader, &AcceptConnectionParams, sizeof(BT_HCICommand_AcceptConnectionReq_t));
Bluetooth_State.CurrentHCIState = Bluetooth_ProcessEvents;
break;
case Bluetooth_Conn_RejectConnection:
BT_HCI_DEBUG(1, "# Reject Connection");
HCICommandHeader = (BT_HCICommand_Header_t)
{
OpCode: (OGF_LINK_CONTROL | OCF_LINK_CONTROL_REJECT_CONNECTION_REQUEST),
ParameterLength: sizeof(BT_HCICommand_RejectConnectionReq_t),
};
/* Copy over the temporary BT device address saved from the Connection Request event, indicate failure
to accept the connection due to limited device resources or incorrect device address */
BT_HCICommand_RejectConnectionReq_t RejectConnectionParams;
memcpy(RejectConnectionParams.RemoteAddress, Bluetooth_TempDeviceAddress, sizeof(RejectConnectionParams.RemoteAddress));
RejectConnectionParams.Reason = Bluetooth_Connection.IsConnected ? ERROR_LIMITED_RESOURCES : ERROR_UNACCEPTABLE_BDADDR;
/* Send the command to reject the remote connection request */
Bluetooth_SendHCICommand(&HCICommandHeader, &RejectConnectionParams, sizeof(BT_HCICommand_RejectConnectionReq_t));
Bluetooth_State.CurrentHCIState = Bluetooth_ProcessEvents;
break;
case Bluetooth_Conn_SendPINCode:
BT_HCI_DEBUG(1, "# Send Pin Code");
HCICommandHeader = (BT_HCICommand_Header_t)
{
OpCode: (OGF_LINK_CONTROL | OCF_LINK_CONTROL_PIN_CODE_REQUEST_REPLY),
ParameterLength: sizeof(BT_HCICommand_PinCodeResp_t),
};
/* Copy over the temporary BT device address saved from the PIN Code Request event, copy over the
local PIN authentication code to the response */
BT_HCICommand_PinCodeResp_t PINCodeRequestParams;
memcpy(PINCodeRequestParams.RemoteAddress, Bluetooth_TempDeviceAddress, sizeof(PINCodeRequestParams.RemoteAddress));
PINCodeRequestParams.PINCodeLength = strlen(Bluetooth_DeviceConfiguration.PINCode);
memcpy(PINCodeRequestParams.PINCode, Bluetooth_DeviceConfiguration.PINCode, sizeof(PINCodeRequestParams.PINCode));
/* Send the command to transmit the device's local PIN number for authentication */
Bluetooth_SendHCICommand(&HCICommandHeader, &PINCodeRequestParams, sizeof(BT_HCICommand_PinCodeResp_t));
Bluetooth_State.CurrentHCIState = Bluetooth_ProcessEvents;
break;
case Bluetooth_Conn_SendLinkKeyNAK:
BT_HCI_DEBUG(1, "# Send Link Key NAK");
HCICommandHeader = (BT_HCICommand_Header_t)
{
OpCode: (OGF_LINK_CONTROL | OCF_LINK_CONTROL_LINK_KEY_REQUEST_NEG_REPLY),
ParameterLength: sizeof(BT_HCICommand_LinkKeyNAKResp_t),
};
/* Copy over the temporary BT device address saved from the Link Key Request event */
BT_HCICommand_LinkKeyNAKResp_t LinkKeyNAKParams;
memcpy(LinkKeyNAKParams.RemoteAddress, Bluetooth_TempDeviceAddress, sizeof(LinkKeyNAKParams.RemoteAddress));
/* Send the command to transmit the link key NAK to the receiver */
Bluetooth_SendHCICommand(&HCICommandHeader, &LinkKeyNAKParams, sizeof(BT_HCICommand_LinkKeyNAKResp_t));
Bluetooth_State.CurrentHCIState = Bluetooth_ProcessEvents;
break;
}
}
/** Sends a Bluetooth HCI control command to the attached Bluetooth device.
*
* \param[in] HCICommandHeader HCI command header to send to the attached device
* \param[in] Parameters Pointer to the source of the control parameters (if any)
* \param[in] ParameterLength Length of the parameters to send in bytes
*
* \return A value from the USB_Host_SendControlErrorCodes_t enum.
*/
static uint8_t Bluetooth_SendHCICommand(const BT_HCICommand_Header_t* const HCICommandHeader,
const void* Parameters,
const uint16_t ParameterLength)
{
/* Need to reserve the amount of bytes given in the header for the complete payload */
uint8_t CommandBuffer[sizeof(BT_HCICommand_Header_t) + HCICommandHeader->ParameterLength];
USB_ControlRequest = (USB_Request_Header_t)
{
.bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_DEVICE),
.bRequest = 0,
.wValue = 0,
.wIndex = 0,
.wLength = sizeof(CommandBuffer)
};
/* Copy over the HCI command header to the allocated buffer */
memcpy(CommandBuffer, HCICommandHeader, sizeof(BT_HCICommand_Header_t));
/* Zero out the parameter section of the response so that all padding bytes are known to be zero */
memset(&CommandBuffer[sizeof(BT_HCICommand_Header_t)], 0x00, HCICommandHeader->ParameterLength);
/* Copy over the command parameters (if any) to the command buffer - note, the number of actual source parameter bytes
may differ to those in the header; any difference in length is filled with 0x00 padding bytes */
memcpy(&CommandBuffer[sizeof(BT_HCICommand_Header_t)], Parameters, ParameterLength);
Pipe_SelectPipe(PIPE_CONTROLPIPE);
return USB_Host_SendControlRequest(CommandBuffer);
}
