In memory of Ben “bushing” Byer, who passed away on Monday, February 8th, 2016.

Changes

Jump to navigation Jump to search
→‎Data Format: Fixed detail of ninth bit for pressure after further testing.
Line 33: Line 33:  
|- style="background-color: #ded;"
 
|- style="background-color: #ded;"
 
| style="border: 1px solid #ccc; padding: 0.2em; background-color: #eee;" | 3
 
| style="border: 1px solid #ccc; padding: 0.2em; background-color: #eee;" | 3
| style="border: 1px solid #ccc; padding: 0.2em;" colspan="8" | '''PRESSURE'''<span style="color: #777;">&lt;<span style="color: #c00;">7:0</span>&gt;</span>
+
| style="border: 1px solid #ccc; padding: 0.2em;" colspan="8" | '''P'''<span style="color: #777;">&lt;<span style="color: #c00;">7:0</span>&gt;</span>
 
|- style="background-color: #ded;"
 
|- style="background-color: #ded;"
 
| style="border: 1px solid #ccc; padding: 0.2em; background-color: #eee;" | 4
 
| style="border: 1px solid #ccc; padding: 0.2em; background-color: #eee;" | 4
Line 51: Line 51:  
| style="border: 1px solid #ccc; padding: 0.2em; background-color: #ddd; color: #888;" | 1
 
| style="border: 1px solid #ccc; padding: 0.2em; background-color: #ddd; color: #888;" | 1
 
| style="border: 1px solid #ccc; padding: 0.2em; background-color: #ddd; color: #888;" | 1
 
| style="border: 1px solid #ccc; padding: 0.2em; background-color: #ddd; color: #888;" | 1
| style="border: 1px solid #ccc; padding: 0.2em;" | '''B'''<span style="color: #c00;">N</span>
+
| style="border: 1px solid #ccc; padding: 0.2em;" | '''P'''<span style="color: #777;">&lt;<span style="color: #c00;">8</span>&gt;</span>
 
| style="border: 1px solid #ccc; padding: 0.2em;" | '''B'''<span style="color: #c00;">L</span>
 
| style="border: 1px solid #ccc; padding: 0.2em;" | '''B'''<span style="color: #c00;">L</span>
 
| style="border: 1px solid #ccc; padding: 0.2em;" | '''B'''<span style="color: #c00;">U</span>
 
| style="border: 1px solid #ccc; padding: 0.2em;" | '''B'''<span style="color: #c00;">U</span>
Line 58: Line 58:  
The X and Y coordinates both read 0xFFF (4095) when the stylus is away from the tablet surface. The X coordinate ranges from around 80-1955 units (increasing from left to right) and the Y coordinate ranges from around 95-1450 (increasing from bottom to top) in testing though this likely varies from unit to unit.
 
The X and Y coordinates both read 0xFFF (4095) when the stylus is away from the tablet surface. The X coordinate ranges from around 80-1955 units (increasing from left to right) and the Y coordinate ranges from around 95-1450 (increasing from bottom to top) in testing though this likely varies from unit to unit.
   −
Pressure varies from around 8 when the pen is off the tablet to 247 when fully pressed in. The pressure value is reported even when the pen is off the tablet surface.
+
P represents the stylus pressure and varies from around 8 when the pen is off the tablet to 505 when fully pressed in. It is a nine-bit value with the upper bit P<8> stored separately in byte 5 to the lower eight bits P<7:0> in byte 3 The pressure value is reported even when the pen is off the tablet surface.
 
  −
BN is an active-high value that is 0 when the nib is released and 1 when the nib is pressed onto the surface of the tablet.
      
BL is the "lower" button and BU is the "upper" button, and both are active-low values that are 1 when their corresponding button is released and 0 when the button is pressed.
 
BL is the "lower" button and BU is the "upper" button, and both are active-low values that are 1 when their corresponding button is released and 0 when the button is pressed.
4

edits

Navigation menu