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Mouse from Steelseries - Rival 100 - Page 91

post #901 of 1496
The RGB on this mouse kinda sucks. It's not vibrant enough.
post #902 of 1496
what people mean is that 50dpi steps are native to the sensor and you can get those steps without screwing around with the mcu.

if the sensor sees two consecutive images like
http://i.imgur.com/BBEAgNX.png
http://i.imgur.com/csw9Yx6.png
the sensor calculates and assigns a number onto how big the shift is, for each axis. i'm not talking about the fine-grained noisy number you had in mind; i simply mean the final final number that the sensor outputs into the motion accumulator registers that are read by the mcu.

if the sensor has no error, then these numbers must be directly proportional to the actual shift in pixels.

it follows that
(the final dpi of the sensor) = (that coefficient of proportionality) * (the physical resolution of the imaged area)

that's what
1000 = 4*250 means

now back to 3059/actual sensors.
from what i understand, the more pixels you start out with, the further you can increase (that coefficient of proportionality) without having an excessive amount of jitter.

from what i understand from what skylit wrote,
there's an initial "hardware" stage where the shift is converted to a number of counts corresponding to 8 * (800cpi) = 6400cpi. and then there's another stage where that number is scaled down to correspond to 6350,6300,6250, or whatever cpi you want, with error accumulation/propagation of course. but in the case of the 3989 (and 9800) that number is scaled upwards instead.
Edited by qsxcv - 10/20/15 at 8:47pm
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post #903 of 1496
more pixels, more bitdepth, less noise -> less jitter at the same sensor DPI -- yes.
Edited by wareya - 10/20/15 at 8:47pm
post #904 of 1496
What are the dpi steps?
post #905 of 1496
Quote:
Originally Posted by Venrar View Post

What are the dpi steps?
250, 500, 1000, 1250, 1500, 1750, 2000, 4000.
post #906 of 1496
Quote:
Originally Posted by Maximillion View Post

250, 500, 1000, 1250, 1500, 1750, 2000, 4000.

Who actually uses 250 dpi. Why didn't they just drop that for 750?
post #907 of 1496
Quote:
Originally Posted by Venrar View Post

Who actually uses 250 dpi. Why didn't they just drop that for 750?

B-but that would mean we wouldn't have 4000dpi!
post #908 of 1496
http://media.digikey.com/pdf/Data%20Sheets/Avago%20PDFs/ADNS-3050.pdf
see pg22
Quote:
4:2 RES [2:0] Set the resolution of sensor
000: 1000 dpi (default)
001: 250 dpi
010: 500 dpi
011: 1250 dpi
100: 1500 dpi
101: 1750 dpi
110: 2000 dpi
there is no 750dpi step???????

then see pg27
Quote:
3:0 DPI 0x00: 4000dpi
0x01: 250dpi
0x02: 500dpi
0x03: 750dpi
0x04: 1000dpi
0x05: 1250dpi
0x06: 1500dpi
0x07: 1750dpi
0x08: 2000dpi
well this register is called the "Full Resolution Register" so i guess there are two places to control it
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post #909 of 1496
So... is there one?
post #910 of 1496
3050 should allow it

question is whether steelseries removed it (which would be stupid imo)
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