HCI GUI Tool #3

MFC study

what is done?>
  1. basic HCI spec
  2. GUI design
  3. get some reference documents "MFC_how to.chm" -> i think it's useful.

I don't know anything about MFC.
I should practice this to implement what I designed.

TODO>
  1. basic MFC study.(a book ordered.)
  2. analyze some easy examples
      -> on going, but it's hard to understand. (calorie calculation program).

HCI GUI Tool #2

HCI GUI Tool #2

topic>

HCI spec study.

contents>

-HCI: Host Controller Interface

-HCI는 interface시에 총 4 type의 packet을 사용하여 통신함.

1. packets: there are 4 types of packet.

-HCI command packet (host -> controller)

-HCI ACL data packet (bi-directional)

-HCI synchronous data packet (bi-directional)

-HCI event packet (controller -> host)

 1)HCI command packet

  -format: OpCode(16 bit) + Parameter length(16 bit) + Parameter + ....

  -OpCode is consist of OGF, OCF.

    .OGF(OpCode Group Field): upper 6 bits

    .OCF(OpCode Command Field): remaining 10 bits

      => OpCode (16bits) = OCF(10bits) + OGF(6bits)

    so, Command packet = OCF(10bits) + OGF(6bits) + Para length(16bits) 로 구성됨.

    .OGF라는 category안에 여러개의 OCF가 존재하는 형태.

      -OGF=0x01: HCI Link Control Commands

      -OGF=0x02: HCI Link Policy Commands:

      -OGF=0x03: HCI Host Controller & BB Commands

      -OGF=0x04: HCI Informational Parameters

      -OGF=0x05: HCI Status Parameters

      -OGF=0x06: HCI Testing Commands.

      -OGF=0x3e: TCI-L2CAP

      -OGF=0x3f: HCI Vendor Commands

 2)HCI event packet

ex) "Read_BD_ADDR" command 입력시 전달되는 packet.

  > Read_BD_ADDR is in 'Information Parameters' Group. so, OGF: 0x04(0000 0100)
  > and its OCF: 0x0009(0000 0000 0000 1001)
  > 따라서 전체 OpCode의 상위 6bits를 구성하는 OGF는 => 00 0100 (0x04)
     remaining 10bits 인 OCF는 => 00 0000 1001(0x009)
     combining above 2 terms(OGF+OCF), total OpCode is "0001 0000 0000 1001"(0x1009)
  > 즉, 총 16bit의 OpCode이며, upper 6bits는 0x04(means "Information Parameters"Group),
     remaining 10bits는 0x0009(means "Read_BD_ADDR")
  > 이를 command packet 형식에 맞게 mapping하면
     OpCode packet = OCF + OGF 이므로
                             = 0x09 + 0x10 = 0000 1001 0001 0000 의 형태로 mapping

HCI GUI Tool #1

HCI GUI Tool #1

I am about to design and implement HCI GUI Tool.

Target Application: HCI Command GUI Tool

TODO>>

-Analyze and understand HCI specification.

.packet structure.

-GUI design and implementation.

IDEA>>

1. Lookup table type: button click시에 해당 packet(bit series)이 출력되도록 한다.

2. packet mapping을 어떻게 할것인가?

3. 받은 packet을 어떻게 decode할것인가?

4. 3번 과정이 끝나면 구상한 GUI model대로 MFC를 이용하여 설계.

1) set basic parameter: com port, baud rate, activate connection with UART.

2) How to make UART connection at first?

3) MFC의 어떤 함수를 이용하여 HCI driver에 접근해야 하는가?