3M? Multi-touch Display M2256PW User Guide 23
3M Touch Systems, Inc. Proprietary Information – 37531 Rev D
Table 2. Calibration Setup Stage
Offset
Field
Size
Value
Description
0 bmRequestType 1 0x21 Class,H2D,Interface
1 bRequest 1 0x09 Set Report
2 wValue 2 0x0303 Msb 03 = Feature
Lsb 03 = Feature Report ID
4 wIndex 2 0 Always 0
6 wLength 2 8 Always 8
Table 3. Data Stage
Offset
Field
Size
Value
Description
0 Report ID 1 0x03 Feature report ID
1 Report Subtype 1 0x04 Indicates a calibration request
2 bCalType 1 0x01 0x01 = Extended cal (CX)
3--7 Not used 5 0 Not used
The device stalls endpoint 0 if the command cannot be processed successfully. The
request cannot be processed if an invalid calibration type is given in the wValue field.
The request will also fail if the 2 calibration points do not fall within certain bounds
established by the firmware. These bounds require that the 2 calibration points be in
opposite quadrants of the sensor.
The host should issue a GetStatus request to determine the status of this request. The
status report includes a command status byte which will be set as shown below.
Table 4. Calibration Response
Command Status Byte
Description
0 Calibration Failed
1 Controller is waiting for a touch in the lower left corner.
Calibration software paints a target in the lower left corner.
2 Controller is waiting for a touch in the upper right corner.
Calibration software paints a target in the upper right corner.
3 Calibration completed successfully.
The controller does not timeout waiting for touch. Use the soft reset command to abort
the calibration.
Determining Target Areas
The default calibration targets (points) are located 12.5% (1/8) inward from the corners
of the video image. For example, suppose the resolution of your Windows-based display
is 1680 x 1050. The Calibrate Extended command calculates the amount to move inward
as follows:
?
Amount to move inward in the X direction: 1680 x 1/8 = 210
?
Amount to move inward in the Y direction: 1050 x 1/8 = 131
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
M30L40C-E3/4W
DIODE SCHOTTKY 30A 40V TO-220AB
MAN6910
LED 7-SEG DUAL CA RED RHDP .56"
MB203LCD-1
LCD MOD W/CABLE/CONN FOR MB203A
MBD101G
DIODE SCHTTKY 7V LW NOISE TO92-2
MBD110DWT1G
DIODE SCHOTTKY DUAL 7V SOT-363
MBD54DWT1G
DIODE SCHOTTKY DUAL 30V SOT-363
MBR10100CTP
DIODE SCHOTTKY 10A 100V TO220-3
MBR1060CT
DIODE SCHOTTKY 10A 60V TO220-3
相关代理商/技术参数
M225759/34-22-9
制造商:ALCATEL 功能描述:M22759/34-22-9 STR TNC XL-ETFE WHT 150C 600V **QPL/CTR**
M22579/11-22-1
制造商:Carlisle Interconnect Components 功能描述:MIL SPEC HOOK UP WIRE
M22579/11-22-2
制造商:Carlisle Interconnect Components 功能描述:MIL SPEC HOOK UP WIRE
M22579/11-22-5
制造商:Carlisle Interconnect Components 功能描述:PTFE GRN 200C 600V **QPL/CTR** ROHS 制造商:Harbour Industries 功能描述:PTFE YLW 200C 600V
M22579/11-24-5
制造商:JAGUAR INDUSTRIES 功能描述:MIL SPEC HOOK UP WIRE
M22579/16-22-0
制造商:Carlisle Interconnect Components 功能描述:M22759/16-22-0 STR TNC ETFE BLK 150C 600V
M225FAN
制造商:MTRONPTI 制造商全称:MTRONPTI 功能描述:5x7 mm, 3.3 Volt, HCMOS/TTL Compatible Output, Clock Oscillator
M225FCN
制造商:MTRONPTI 制造商全称:MTRONPTI 功能描述:5x7 mm, 3.3 Volt, HCMOS/TTL Compatible Output, Clock Oscillator