SPI - Command Acknowledgement

Report Type: Interrupt IN
Report Size: 7 Bytes

Report ID	Acknowledged Report ID	Status	Arguments
00000001	1 byte	n i cccccc	4 bytes

If an OUT Report does not have its own dedicated acknowledgement report(s) then this will be the default response to any of the commands that the Host sends to the device.

Report ID

HID Report ID. Always 0x01.

Acknowledged Report ID

The ID of the SPI HID Reports that is being ACK’d or NACK’d. Note that the order of responses to commands is not necessarily in the same order as they are received so you must only send one command of a given type to an interface at a time and wait for its acknowledgement.

Status and Arguments

The status of the command that was executed:

Bits	Direction	Meaning
n	IN	Negative Acknowledgement flag; 1 if the command is NACK’d (an error), or 0 if it is ACK’d (no error).
i	IN	Interface-specific (ie. non-generic) error code if 1, else a generic error code if 0.
cccccc	IN	A status code to give more meaning to the ACK or NACK; see below.

ACK Status Codes

As well as the generic codes defined in Report Acknowledgement, the following interface-specific values are defined:

Code	Arguments	Meaning
None

NACK Status Codes

As well as the generic codes defined in Report Acknowledgement, the following interface-specific values are defined:

Code	Arguments	Meaning
None