3M M2256PW User Manual - Page 26

26 3M™ Display M2256PW User Guide Table 10. Data Stage (controller response) Offset Field 0 Report ID 1 Max Count Size 1 1 Value 0x12 0x1E Description Feature Report ID Number of actual 30 fingers supported Note: The number of actual contacts reported may exceed this number (possibly up to 60). Set Feature - Reset This is a request to perform a controller reset. Soft resets are automatic after any block parameter changes. Table 11. Reset - Setup Stage Offset 0 1 2 Field bmRequestType bRequest wValue 4 wIndex 6 wLength Size 1 1 2 Value 0x21 0x09 0x0303 2 0 2 8 Description Class,H2D,Interface Set Report msb=03=Feature lsb=03= Feature Report ID Always 0 Always 8 Table 12. Reset - Data Stage Offset 0 1 2 Field Report ID Report Subtype bResetType 3--7 Size 1 1 1 5 Value 0x03 0x07 0x01 0x02 0 Description Feature Report ID Indicates a reset request Soft Reset Hard Reset Not used A Hard Reset will cause the controller to reenumerate. In the case of a Soft Reset, after sending the command, the controller will acknowledge (ACK) the transfer, but the command will not yet be completed. Before sending any other commands, the host should poll with GetStatus until the command status field returns "Soft Reset Occurred," "Command Complete," or "Fail". Any timeout for this status polling should be 2 seconds minimum. Set Feature -Restore Defaults This is a request to restore parameter defaults. 3M Touch Systems, Inc. Proprietary Information