CMSIS-DAP  
Interface Firmware for CoreSight Debug Access Port
 
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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 |
|******|******|

DAP_Info Response:

| BYTE | BYTE | BYTE |
< 0x00 | Len | Info |
|******|******|++++++|
Note
An unrecognized ID returns no value (indicated by Len = 0).
The ID for Vendor Name, Product Name, and Serial Number may return no string (indicated by Len = 0). In this case the USB Device Information is used to obtain Vendor Name, Product Name, and Serial Number.
The value of CMSIS-DAP Protocol Version must be one of the versions from the CMSIS-DAP revision history, such as "2.1.0".
Target Device Vendor, Target Device Name, Target Board Vendor and Target Board Name are only available on On-Board Debug Units with known Target. Refer to TARGET_FIXED for more information. Strings should match the listed attribute values from the corresponding CMSIS Board Support Pack. If the Target is not known no string is returned (indicated by Len = 0).
Target Device Vendor should match the Dvendor attribute value (excluding the colon and vendor code suffix when present) of the mountedDevice.
Target Device Name should match the Dname attribute value of the mountedDevice.
Target Board Vendor should match the vendor attribute value (excluding the colon and vendor code suffix when present).
Target Board Name should match the name attribute value.
Product Firmware Version may return no string (indicated by Len = 0).

DAP_Info Response (for ID=0xF0):

The ID=0xF0 Capabilities obtains information about the available interface to the Device. The reply consists of one or two Info bytes with bits that indicate the features of the Debug Unit. The features indicate the command scope of the CMSIS-DAP firmware. If certain features are not available, the debugger should not call the related commands as the may not be implemented. Commands that are not implemented reply with 0xFF instead of repeating the command byte.

| BYTE | BYTE | BYTE *| BYTE |
< 0x00 | Len | Info0 | Info1 |
|******|******|*******|*******|

Available transfer protocols to target:

Serial Wire Trace (SWO) support:

Command extensions for transfer protocol:

Time synchronisation via Test Domain Timer:

SWO Streaming Trace support:

UART Communication Port support:

UART Communication via USB COM Port support:


DAP_Info Response (for ID=0xF1):

The ID=0xF1 Test Domain Timer obtains the parameter information about an optional 32-bit Test Domain Timer that may be used for various time measurements.

| BYTE | BYTE | WORD *****|
< 0x00 | 0x08 | Frequency |
|******|******|***********|