Waltop Sirius Battery Free Tablet
| Vendor | 172f | Waltop | Photo |
|
|---|---|---|---|---|
| Product | 0502 | Sirius Battery Free Tablet | ||
| Status |
Supported
in:
|
Specs | 10″×6″, 4000 LPI, 200 RPS , 1024 PL, tilt-sensitive | |
| Sold as |
|
|||
A patch adding support for this tablet was accepted into the kernel.
Reports
As probably all the other Waltop tablets, this tablet has other modes than the default. One such mode is enabled by sending 0x10, 0x01 as feature report with ID 0x02.
After that, the tablet starts reporting pen coordinates in full resolution of 4000 LPI and all the frame button pressures.
The structure of the reports becomes the following.
0x02
This is the pen report.
| Byte | Bit | Meaning |
|---|---|---|
| 0 | 0-7 | Report ID |
| 1-2 | 8-23 | X axis (0-40000) |
| 3-4 | 24-39 | Y axis (0-24000) |
| 5 | 40-41 | Proximity |
| 42 | Tip button | |
| 43 | Lower side button | |
| 44 | Upper side button | |
| 45-47 | Padding (always zero) | |
| 6-7 | 48-63 | Tip pressure (0-1023) |
| 8 | 64-71 | X tilt |
| 9 | 72-79 | Y tilt |
The tilt measurement is quite imprecise. The zero position is tilted about 15 degrees towards the bottom edge of the tablet. The negative/positive tilting angle values are not equal. The change speed looks more like the sine of the angle, than the angle. Maximum seen angles so far are [-69, 69] and [-71, 73] for X and Y tilt correspondingly.
0x05
This is the pen report for working area border locations. Probably intended for detecting the “virtual” button clicks. Probably, indescribable with a HID report descriptor.
| Byte | Bit | Meaning |
|---|---|---|
| 0 | 0-7 | Report ID |
| 1 | 8-9 | Proximity |
| 10 | Tip button | |
| 11 | Lower side button | |
| 12 | Upper side button | |
| 13-15 | Padding (always zero) | |
| 2 | 16-23 | Border: 1 - bottom, 2 - top, 4 - left, 8 - right |
| 3 | 24-31 | Border coordinate: vertical borders - 0x01-0x18, top-bottom; horizontal borders - 0x01-0x28, left-right |
| 4 | 32-39 | The higher byte of the Y axis value last reported with report 0x02. Basically, garbage. |
| 5-7 | 40-63 | Padding (always zero) |
0x0A
This report is used for all the frame buttons and most of the dials’ functions. The button reports are 10 bytes long, the dials’ report are 8. The second byte signifies the “subreport” ID.
The overloaded usage probably makes this report impossible to describe fully with a HID report descriptor, which is a pity.
Subreport descriptions follow.
0x0E
This is the frame button subreport.
| Byte | Bit | Meaning |
|---|---|---|
| 0 | 0-7 | Report ID |
| 1 | 8-15 | Subreport ID |
| 2 | 16 | Left “eraser” button |
| 17 | Left Shift | |
| 18 | Left Tab | |
| 19 | Left Alt | |
| 20 | Left Ctrl | |
| 21 | Right “eraser” button | |
| 22 | Right Shift | |
| 23 | Right Tab | |
| 3 | 24 | Right Alt |
| 25 | Right Ctrl | |
| 26 | “Vertical/horizontal scroll” dials’ function selection button | |
| 27 | “Zoom/volume” dials’ function selection button | |
| 28 | “Keyboard direction” dials’ function selection button | |
| 29 | Dials’ subfunction switch button | |
| 30-31 | Padding (always zero) | |
| 4-9 | 32-79 | Padding (always zero) |
0x02
This is the dials subreport. Note: it is only used for vertical/horizontal scroll and zoom/volume functions. For cursor movement function 0x0D report is used instead.
| Byte | Bit | Meaning |
|---|---|---|
| 0 | 0-7 | Report ID |
| 1 | 8-15 | Subreport ID |
| 2 | 16-23 | Left/right wheel position change: -1/0/1 for counterclockwise/none/clockwise correspondingly. |
| 3-5 | 24-47 | Padding (always zero) |
| 6 | 48-55 | Right wheel position: 0 for no finger, 1-8 for position starting from 12 hours, clockwise. |
| 7 | 56-63 | Left wheel position: 0 for no finger, 1-8 for position starting from 12 hours, clockwise. |
The finger sensing is quite imprecise to the point of reporting wrong direction or not reporting change when moving slowly.
0x0D
This is keyboard-imitating report for the dials’ “cursor movement” function. The report is 8 bytes long. Only byte with offset 3 is used. The values are as follows.
| Value | Meaning |
|---|---|
| 0x50 | Left |
| 0x51 | Down |
| 0x52 | Up |
| 0x4F | Right |
| 0x4A | Home |
| 0x4B | Page Up |
| 0x4D | End |
| 0x4E | Page Down |