3M M2256PW manual Data Sequence Bits

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3M™ Multi-touch Display M2256PW User Guide

Data Sequence	Bits

	7	6	5	4	3	2	1	0
Y - Byte 5	0	Y13	Y12	Y11	Y10	Y9	Y8	Y7
ID – Byte 6	0	N6	N5	N4	N3	N2	N1	N0

Note 1: P is the proximity bit. It is set to 1 when there is a touch, 0 for a liftoff.

The ID is associated with a touch stream from one finger. The ID, in the range of 0-127, is assigned on a rotating basis at touchdown. A finger touch stream consists of a touchdown, maybe some continuing touch points, ending with a liftoff. The ID is released on liftoff, and becomes available to be reassigned.

When multiple fingers are down, the packets from the touch streams are sent interleaved. There is no order imposed on the interleave.

3M Touch Systems, Inc. Proprietary Information – 37531 Rev D

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Contents 3M Touch Systems, Inc. Proprietary Information 37531 Rev D 3M Multi-touch Display M2256PW User Guide Contents Appendix a 3M PX USB Controller Communications Appendix B 3M PX Serial Controller CommunicationsAppendix C Regulatory Information Intended Use Important Safety InformationIntroduction OverviewExplanation of Signal Word Consequences Maintaining Your Touch Display Important Notes3M Touch Systems Support Services Touch Sensor Care and CleaningContact 3M Touch Systems System Requirements Setting up Your M2256PW Multi-touch DisplayCables Included with Your M2256PW Multi-touch Display Unpacking Your Touch DisplayConnecting the Touch Display Testing the M2256PW Multi-touch DisplayArm Mounting Option Supported Video Display Modes and Refresh Rates Using the Standard Controls for the Video CardApplicable Display Mode and Refresh Rate Refresh Rate Hz Video Card RequirementsMenu/Select Down Up Auto/Exit Power LED Configuring the Display SettingsMultimedia Features Access to the Video ControlsChoices Description Adjusting the M2256PW Video DisplayAudio Tools Multitouch Application Support Enabling Your M2256PW Multi-touch DisplayWindows 7 USB Compatibility All Other PlatformsVideo Alignment Installing 3M MicroTouch Software3M Multi-touch Display M2256PW User Guide 3M PX USB Controller Communications Overview of USB Firmware CommunicationsCommunication Basics HID Class Requests Command SetSet Feature Calibration Receiving Reports from the ControllerData Stage Offset Field Size Value Description Calibration Setup Stage Offset Field Size Value DescriptionCalibration Response Command Status Byte Description Determining Target AreasGet Feature GetStatus Setup Stage Offset Field Size Value Description Get Feature GetMaxCountPower On Check Bit Fields Bit Number Description Valid Command Status Field Entries Response DescriptionSet Feature Reset Reset Setup Stage Offset Field Size Value DescriptionReset Data Stage Offset Field Size Value Description Offset Field Size Value Description Set Feature -Restore DefaultsCoordinate Data MultiTouch Digitizer mode Async Report Asynchronous ReportsValue Description Touch Report Structure Offset Field3M PX Serial Controller Communications Overview of Firmware CommandsCommunication Parameters Controller Default SettingsOperating Mode Communicating with the ControllerReceiving Responses from the Controller Sending Commands to the ControllerController Initialization Firmware CommandsSOH Cxcr Command Code DescriptionCalibrate MDUCalibrate Procedure Guidelines for Calibrate CommandGet Copyright Mode Down UpMode Inactive Mode StreamOutput Identity Name CommandNull Command Soft ResetSOH Rdcr Restore DefaultsOperating Parameter Default Unit TypeTouch Data Format Bit DescriptionData Sequence Bits Data Sequence Bits Regulatory Information Regulatory Agency ApprovalsFCC-B CE Conformity for Europe FCC Warning