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@ -98,13 +98,12 @@ void RFCOMM_ProcessPacket(void* Data, Bluetooth_Channel_t* const Channel)
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static void RFCOMM_ProcessSABM(const RFCOMM_Header_t* const FrameHeader, Bluetooth_Channel_t* const Channel)
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{
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BT_RFCOMM_DEBUG(1, "<< SABM Received");
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BT_RFCOMM_DEBUG(2, "-- Address 0x%02X", FrameHeader->Address);
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BT_RFCOMM_DEBUG(2, "-- DLCI 0x%02X", FrameHeader->Address.DLCI);
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// TODO: Reset channel send/receive state here
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BT_RFCOMM_DEBUG(1, ">> UA Sent");
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RFCOMM_SendFrame(FrameHeader->Address, RFCOMM_Frame_UA, 0, NULL, Channel);
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RFCOMM_SendFrame(FrameHeader->Address.DLCI, true, (RFCOMM_Frame_UA | FRAME_POLL_FINAL), 0, NULL, Channel);
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}
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static void RFCOMM_ProcessUA(const RFCOMM_Header_t* const FrameHeader, Bluetooth_Channel_t* const Channel)
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@ -139,20 +138,25 @@ static void RFCOMM_ProcessUIH(const RFCOMM_Header_t* const FrameHeader, Bluetoot
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BT_RFCOMM_DEBUG(2, "-- Address 0x%02X", FrameHeader->Address);
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}
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static void RFCOMM_SendFrame(const uint8_t Address, const uint8_t Type, const uint16_t DataLen, const uint8_t* Data,
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static void RFCOMM_SendFrame(const uint8_t DLCI, const bool CommandResponse, const uint8_t Control, const uint16_t DataLen, const uint8_t* Data,
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Bluetooth_Channel_t* const Channel)
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{
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struct
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{
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RFCOMM_Header_t FrameHeader;
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uint8_t Size[1 + (DataLen >= 128)];
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uint8_t Size[(DataLen < 128) ? 1 : 2];
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uint8_t Data[DataLen];
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uint8_t FCS;
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} ResponsePacket;
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/* Set the frame header values to the specified address and frame type */
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ResponsePacket.FrameHeader.Address = Address;
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ResponsePacket.FrameHeader.Control = Type;
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ResponsePacket.FrameHeader.Control = Control;
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ResponsePacket.FrameHeader.Address = (RFCOMM_Address_t)
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{
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.EA = true,
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.CR = CommandResponse,
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.DLCI = DLCI,
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};
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/* Set the lower 7 bits of the packet length */
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ResponsePacket.Size[0] = (DataLen << 1);
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@ -166,9 +170,12 @@ static void RFCOMM_SendFrame(const uint8_t Address, const uint8_t Type, const ui
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/* Copy over the packet data from the source buffer to the response packet buffer */
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memcpy(ResponsePacket.Data, Data, DataLen);
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/* Calculate the frame checksum from all fields except the FCS field itself */
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ResponsePacket.FCS = RFCOMM_GetFCSValue(&ResponsePacket, sizeof(ResponsePacket) - sizeof(ResponsePacket.FCS));
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/* Calculate the frame checksum from the appropriate fields */
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if ((Control & ~FRAME_POLL_FINAL) == RFCOMM_Frame_UIH)
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ResponsePacket.FCS = RFCOMM_GetFCSValue(&ResponsePacket, sizeof(ResponsePacket.FrameHeader));
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else
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ResponsePacket.FCS = RFCOMM_GetFCSValue(&ResponsePacket, sizeof(ResponsePacket.FrameHeader) + sizeof(ResponsePacket.Size));
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/* Send the completed response packet to the sender */
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Bluetooth_SendPacket(&ResponsePacket, sizeof(ResponsePacket), Channel);
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}
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@ -179,9 +186,12 @@ static uint8_t RFCOMM_GetFCSValue(const void* FrameStart, uint16_t Length)
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uint8_t FCS = 0xFF;
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while (Length--)
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FCS = pgm_read_byte(CRC8_Table[FCS ^ *(CurrPos++)]);
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{
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FCS = pgm_read_byte(&CRC8_Table[FCS ^ *CurrPos]);
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CurrPos++;
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}
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return ~FCS;
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return (0xFF - FCS);
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}
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static uint16_t RFCOMM_GetFrameDataLength(const uint8_t** BufferPos)
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