DAP_Info

Get Information about CMSIS-DAP Debug Unit. More...

Get Information about CMSIS-DAP Debug Unit.

The DAP_Info Command provides configuration information about the Debug Unit itself and the capabilities.

DAP_Info Command:

  BYTE | BYTE |
> 0x00 | ID   |
 ******|******| 

• ID: Request Identifier to obtain information in the Response:
  • 0x01 = Get the Vendor ID (string).
  • 0x02 = Get the Product ID (string).
  • 0x03 = Get the Serial Number (string).
  • 0x04 = Get the CMSIS-DAP Firmware Version (string).
  • 0x05 = Get the Target Device Vendor (string).
  • 0x06 = Get the Target Device Name (string).
  • 0xF0 = Get information about the Capabilities (BYTE) of the Debug Unit.
  • 0xFD = Get the SWO Trace Buffer Size (WORD).
  • 0xFE = Get the maximum Packet Count (BYTE).
  • 0xFF = Get the maximum Packet Size (SHORT).

DAP_Info Response:

  BYTE | BYTE | BYTE |
< 0x00 | Len  | Info |
 ******|******|++++++|

• Len: Info length in bytes.
• Info:
  • a string encoded in US ASCII. Len is the string length including the \x00 terminator. Len = 0 indicates no information.
  • a BYTE value (indicated with Len = 1).
  • a SHORT value (indicated with Len = 2).
  • a WORD value (indicated with Len = 4).

The ID Capabilities obtains information about the available interface to the Device. The information BYTE contains bits that indicate which communication methods are provided to the Device.

• Bit 0: 1 = SWD Serial Wire Debug communication is implemented (0 = not implemented).
• Bit 1: 1 = JTAG communication is implemented (0 = not implemented).
• Bit 2: 1 = SWO UART - UART Serial Wire Output is implemented (0 = not implemented).
• Bit 3: 1 = SWO Manchester - Manchester Serial Wire Output is implemented (0 = not implemented).

Note

The ID for Vendor ID, Product ID, and Serial Number may return no string (indicated by Len = 0). In this case the USB Device Information is used to obtain Vendor, Product, and Serial Number.

Target Device Vendor and Target Device Name are only available on Debug Units with known Target Device. Refer to TARGET_DEVICE_FIXED for more information. If the Target Device is not known no string is returned (indicated by Len = 0).