Make XPLAINBridge serial bridge much more reliable for the reception of characters...

[pub/USBasp.git] / Demos / Host / Incomplete / BluetoothHost / Lib / RFCOMM.c

diff --git a/Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMM.c b/Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMM.c
index 60cce84..7c39cb0 100644 (file)
--- a/Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMM.c
+++ b/Demos/Host/Incomplete/BluetoothHost/Lib/RFCOMM.c
@@ -70,17 +70,14 @@ void RFCOMM_Initialize(void)
 {
        /* Reset the RFCOMM channel structures, to invalidate any confiured RFCOMM channels */
        for (uint8_t i = 0; i < RFCOMM_MAX_OPEN_CHANNELS; i++)
 {
        /* Reset the RFCOMM channel structures, to invalidate any confiured RFCOMM channels */
        for (uint8_t i = 0; i < RFCOMM_MAX_OPEN_CHANNELS; i++)

-         RFCOMM_Channels[i].DLCI = 0x00;
+         RFCOMM_Channels[i].State = RFCOMM_Channel_Closed;

 }
 
 void RFCOMM_ProcessPacket(void* Data, Bluetooth_Channel_t* const Channel)
 {
        const RFCOMM_Header_t* FrameHeader  = (const RFCOMM_Header_t*)Data;
        const uint8_t*         FrameData    = (const uint8_t*)Data + sizeof(RFCOMM_Header_t);
 }
 
 void RFCOMM_ProcessPacket(void* Data, Bluetooth_Channel_t* const Channel)
 {
        const RFCOMM_Header_t* FrameHeader  = (const RFCOMM_Header_t*)Data;
        const uint8_t*         FrameData    = (const uint8_t*)Data + sizeof(RFCOMM_Header_t);

-       uint16_t               FrameDataLen = RFCOMM_GetFrameDataLength(FrameData);
-
-       /* Adjust the frame data pointer to skip over the variable size field */
-       FrameData += (FrameDataLen < 128) ? 1 : 2;
+       uint16_t               FrameDataLen = RFCOMM_GetVariableFieldValue(&FrameData);

        
        /* Decode the RFCOMM frame type from the header */
        switch (FrameHeader->Control & ~FRAME_POLL_FINAL)
        
        /* Decode the RFCOMM frame type from the header */
        switch (FrameHeader->Control & ~FRAME_POLL_FINAL)


@@ -106,133 +103,47 @@ void RFCOMM_ProcessPacket(void* Data, Bluetooth_Channel_t* const Channel)
        }
 }
 
        }
 }
 

-static void RFCOMM_ProcessDM(const RFCOMM_Address_t* const FrameAddress, Bluetooth_Channel_t* const Channel)
-{
-       BT_RFCOMM_DEBUG(1, "<< DM Received");
-       BT_RFCOMM_DEBUG(2, "-- DLCI 0x%02X", FrameAddress->DLCI);
-}
-
-static void RFCOMM_ProcessDISC(const RFCOMM_Address_t* const FrameAddress, Bluetooth_Channel_t* const Channel)
-{
-       BT_RFCOMM_DEBUG(1, "<< DISC Received");
-       BT_RFCOMM_DEBUG(2, "-- DLCI 0x%02X", FrameAddress->DLCI);
-
-       // TODO: Close down connection
-
-       BT_RFCOMM_DEBUG(1, ">> UA Sent");
-       RFCOMM_SendFrame(FrameAddress->DLCI, true, (RFCOMM_Frame_UA | FRAME_POLL_FINAL), 0, NULL, Channel);
-}
-
-static void RFCOMM_ProcessSABM(const RFCOMM_Address_t* const FrameAddress, Bluetooth_Channel_t* const Channel)
+RFCOMM_Channel_t* RFCOMM_GetChannelData(const uint8_t DLCI)

 {
 {

-       BT_RFCOMM_DEBUG(1, "<< SABM Received");
-       BT_RFCOMM_DEBUG(2, "-- DLCI 0x%02X", FrameAddress->DLCI);
-       
-       /* Find a free entry in the RFCOMM channel multiplexer state array */
+       /* Search through the RFCOMM channel list, looking for the specified channel */

        for (uint8_t i = 0; i < RFCOMM_MAX_OPEN_CHANNELS; i++)
        {
                RFCOMM_Channel_t* CurrRFCOMMChannel = &RFCOMM_Channels[i];
        
        for (uint8_t i = 0; i < RFCOMM_MAX_OPEN_CHANNELS; i++)
        {
                RFCOMM_Channel_t* CurrRFCOMMChannel = &RFCOMM_Channels[i];
        

-               /* If the channel's DLCI is zero, the channel state entry is free */
-               if (!(CurrRFCOMMChannel->DLCI))
-               {
-                       CurrRFCOMMChannel->DLCI       = FrameAddress->DLCI;
-                       CurrRFCOMMChannel->Configured = false;
-               
-                       BT_RFCOMM_DEBUG(1, ">> UA Sent");
-                       RFCOMM_SendFrame(FrameAddress->DLCI, true, (RFCOMM_Frame_UA | FRAME_POLL_FINAL), 0, NULL, Channel);
-                       return;
-               }
+               /* If the current non-closed channel's DLCI matches the search DLCI, return it to the caller */
+               if ((CurrRFCOMMChannel->DLCI == DLCI) && (CurrRFCOMMChannel->State != RFCOMM_Channel_Closed))
+                 return CurrRFCOMMChannel;

        }
 
        }
 

-       BT_RFCOMM_DEBUG(1, ">> DM Sent");
-
-       /* No free channel in the multiplexer - decline the SABM by sending a DM frame */
-       RFCOMM_SendFrame(FrameAddress->DLCI, true, (RFCOMM_Frame_DM | FRAME_POLL_FINAL), 0, NULL, Channel);
+       /* Channel not found in the channel state table, return failure */
+       return NULL;

 }
 
 }
 

-static void RFCOMM_ProcessUA(const RFCOMM_Address_t* const FrameAddress, Bluetooth_Channel_t* const Channel)
+uint16_t RFCOMM_GetVariableFieldValue(const uint8_t** BufferPos)

 {
 {

-       BT_RFCOMM_DEBUG(1, "<< UA Received");
-       BT_RFCOMM_DEBUG(2, "-- DLCI 0x%02X", FrameAddress->DLCI);
-}
-
-static void RFCOMM_ProcessUIH(const RFCOMM_Address_t* const FrameAddress, const uint16_t FrameLength, 
-                              const uint8_t* FrameData, Bluetooth_Channel_t* const Channel)
-{
-       BT_RFCOMM_DEBUG(1, "<< UIH Received");
-       BT_RFCOMM_DEBUG(2, "-- DLCI 0x%02X", FrameAddress->DLCI);
-       BT_RFCOMM_DEBUG(2, "-- Length 0x%02X", FrameLength);
+       uint8_t FirstOctet;
+       uint8_t SecondOctet = 0;

        
        

-       if (FrameAddress->DLCI == RFCOMM_CONTROL_DLCI)
-       {
-               RFCOMM_ProcessControlCommand(FrameData, Channel);
-               return;
-       }
-
-       // TODO: Handle regular channel data here
-}
-
-static void RFCOMM_ProcessControlCommand(const uint8_t* Command, Bluetooth_Channel_t* const Channel)
-{
-       const RFCOMM_Command_t* CommandHeader  = (const RFCOMM_Command_t*)Command;
-       const uint8_t*          CommandData    = (const uint8_t*)Command + sizeof(RFCOMM_Command_t);
-
-       switch (CommandHeader->Command)
+       FirstOctet = **BufferPos;
+       (*BufferPos)++;
+       
+       /* If the field size is more than a single byte, fetch the next byte in the variable length field */
+       if (!(FirstOctet & 0x01))

        {
        {

-               case RFCOMM_Control_Test:
-                       BT_RFCOMM_DEBUG(1, "<< TEST Command");
-                       break;
-               case RFCOMM_Control_FlowControlEnable:
-                       BT_RFCOMM_DEBUG(1, "<< FCE Command");
-                       break;
-               case RFCOMM_Control_FlowControlDisable:
-                       BT_RFCOMM_DEBUG(1, "<< FCD Command");
-                       break;
-               case RFCOMM_Control_ModemStatus:
-                       BT_RFCOMM_DEBUG(1, "<< MS Command");
-                       break;
-               case RFCOMM_Control_RemotePortNegotiation:
-                       BT_RFCOMM_DEBUG(1, "<< RPN Command");
-                       break;
-               case RFCOMM_Control_RemoteLineStatus:
-                       BT_RFCOMM_DEBUG(1, "<< RLS Command");
-                       break;
-               case RFCOMM_Control_DLCParameterNegotiation:
-                       BT_RFCOMM_DEBUG(1, "<< DPN Command");
+               SecondOctet = **BufferPos;
+               (*BufferPos)++;

 
 

-                       // TODO - Set channel state
-//                     RFCOMM_Channel_t* RFCOMMChannel = RFCOMM_GetChannelData(
-//                     RFCOMMChannel->Configured = true;
-                       
-                       // TODO - send ACK/NAK response                 
-                       break;
-               default:
-                       BT_RFCOMM_DEBUG(1, "<< Unknown Command");                       
-
-                       struct
-                       {
-                               RFCOMM_Command_t Header;
-                               RFCOMM_Command_t Command;
-                       } Response =
-                               {
-                                       .Header = (RFCOMM_Command_t)
-                                       {
-                                               .Command = RFCOMM_Control_NonSupportedCommand,
-                                               .CR      = true,
-                                               .EA      = true,
-                                       },
-                                       
-                                       .Command = *CommandHeader,
-                               };
-
-                       RFCOMM_SendFrame(RFCOMM_CONTROL_DLCI, false, RFCOMM_Frame_UIH, sizeof(RFCOMM_Command_t), &Response, Channel);                   
-                       break;
+               /* Discard any remaining bytes in the variable length field that won't fit in the return value */
+               while (!(**BufferPos & 0x01))
+                 (*BufferPos)++;

        }
        }

+
+       /* Bitshift the bytes that comprise the variable length field so that they form a single integer */
+       return (((uint16_t)SecondOctet << 7) | FirstOctet >> 1);

 }
 
 }
 

-static void RFCOMM_SendFrame(const uint8_t DLCI, const bool CommandResponse, const uint8_t Control, const uint16_t DataLen,
-                             const void* Data, Bluetooth_Channel_t* const Channel)
+void RFCOMM_SendFrame(const uint8_t DLCI, const bool CommandResponse, const uint8_t Control, const uint16_t DataLen,
+                      const void* Data, Bluetooth_Channel_t* const Channel)

 {
        struct
        {
 {
        struct
        {


@@ -287,26 +198,84 @@ static uint8_t RFCOMM_GetFCSValue(const void* FrameStart, uint8_t Length)
        return ~FCS;
 }
 
        return ~FCS;
 }
 

-static uint16_t RFCOMM_GetFrameDataLength(const uint8_t* const BufferPos)
+static void RFCOMM_ProcessDM(const RFCOMM_Address_t* const FrameAddress, Bluetooth_Channel_t* const Channel)

 {
 {

-       uint8_t FirstOctet  = BufferPos[0];
-       uint8_t SecondOctet = 0;
-       
-       if (!(FirstOctet & 0x01))
-         SecondOctet = BufferPos[1];
+       BT_RFCOMM_DEBUG(1, "<< DM Received");
+       BT_RFCOMM_DEBUG(2, "-- DLCI 0x%02X", FrameAddress->DLCI);
+}
+
+static void RFCOMM_ProcessDISC(const RFCOMM_Address_t* const FrameAddress, Bluetooth_Channel_t* const Channel)
+{
+       BT_RFCOMM_DEBUG(1, "<< DISC Received");
+       BT_RFCOMM_DEBUG(2, "-- DLCI 0x%02X", FrameAddress->DLCI);
+
+       RFCOMM_Channel_t* RFCOMMChannel = RFCOMM_GetChannelData(FrameAddress->DLCI);

        
        

-       return (((uint16_t)SecondOctet << 7) | FirstOctet >> 1);
+       /* If the requested channel is currently open, destroy it */
+       if (RFCOMMChannel != NULL)
+         RFCOMMChannel->DLCI = 0x00;
+
+       BT_RFCOMM_DEBUG(1, ">> UA Sent");
+       RFCOMM_SendFrame(FrameAddress->DLCI, true, (RFCOMM_Frame_UA | FRAME_POLL_FINAL), 0, NULL, Channel);

 }
 
 }
 

-RFCOMM_Channel_t* RFCOMM_GetChannelData(const uint8_t DLCI)
+static void RFCOMM_ProcessSABM(const RFCOMM_Address_t* const FrameAddress, Bluetooth_Channel_t* const Channel)

 {
 {

+       BT_RFCOMM_DEBUG(1, "<< SABM Received");
+       BT_RFCOMM_DEBUG(2, "-- DLCI 0x%02X", FrameAddress->DLCI);
+       
+       /* Find a free entry in the RFCOMM channel multiplexer state array */

        for (uint8_t i = 0; i < RFCOMM_MAX_OPEN_CHANNELS; i++)
        {
                RFCOMM_Channel_t* CurrRFCOMMChannel = &RFCOMM_Channels[i];
        
        for (uint8_t i = 0; i < RFCOMM_MAX_OPEN_CHANNELS; i++)
        {
                RFCOMM_Channel_t* CurrRFCOMMChannel = &RFCOMM_Channels[i];
        

-               if (CurrRFCOMMChannel->DLCI == DLCI)
-                 return CurrRFCOMMChannel;
+               /* If the channel's DLCI is zero, the channel state entry is free */
+               if (!(CurrRFCOMMChannel->DLCI))
+               {
+                       CurrRFCOMMChannel->DLCI     = FrameAddress->DLCI;
+                       CurrRFCOMMChannel->State    = RFCOMM_Channel_Open;
+                       CurrRFCOMMChannel->Priority = 7 + (CurrRFCOMMChannel->DLCI >> 3) + ((CurrRFCOMMChannel->DLCI >> 3) * 7);
+                       CurrRFCOMMChannel->MTU      = 0xFFFF;
+                       CurrRFCOMMChannel->Remote.Signals     = 0 | (1 << 0);
+                       CurrRFCOMMChannel->Remote.BreakSignal = 0 | (1 << 0);
+                       CurrRFCOMMChannel->Local.Signals      = RFCOMM_SIGNAL_RTC | RFCOMM_SIGNAL_RTR | RFCOMM_SIGNAL_DV | (1 << 0);
+                       CurrRFCOMMChannel->Local.BreakSignal  = 0 | (1 << 0);
+               
+                       BT_RFCOMM_DEBUG(1, ">> UA Sent");
+                       RFCOMM_SendFrame(FrameAddress->DLCI, true, (RFCOMM_Frame_UA | FRAME_POLL_FINAL), 0, NULL, Channel);
+                       return;
+               }

        }
        }

+
+       BT_RFCOMM_DEBUG(1, ">> DM Sent");
+
+       /* No free channel in the multiplexer - decline the SABM by sending a DM frame */
+       RFCOMM_SendFrame(FrameAddress->DLCI, true, (RFCOMM_Frame_DM | FRAME_POLL_FINAL), 0, NULL, Channel);
+}
+
+static void RFCOMM_ProcessUA(const RFCOMM_Address_t* const FrameAddress, Bluetooth_Channel_t* const Channel)
+{
+       BT_RFCOMM_DEBUG(1, "<< UA Received");
+       BT_RFCOMM_DEBUG(2, "-- DLCI 0x%02X", FrameAddress->DLCI);
+}
+
+static void RFCOMM_ProcessUIH(const RFCOMM_Address_t* const FrameAddress, const uint16_t FrameLength, 
+                              const uint8_t* FrameData, Bluetooth_Channel_t* const Channel)
+{
+       if (FrameAddress->DLCI == RFCOMM_CONTROL_DLCI)
+       {
+               RFCOMM_ProcessControlCommand(FrameData, Channel);
+               return;
+       }
+
+       BT_RFCOMM_DEBUG(1, "<< UIH Received");
+       BT_RFCOMM_DEBUG(2, "-- DLCI 0x%02X", FrameAddress->DLCI);
+       BT_RFCOMM_DEBUG(2, "-- Length 0x%02X", FrameLength);
+               
+       puts("RFCOMM Data: ");

        
        

-       return NULL;
+       for (uint8_t i = 0; i < FrameLength; i++)
+         printf("0x%02X (%c) ", FrameData[i], FrameData[i]);
+       
+       printf("\r\n");

 }
 }