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Thread: 3366 mice have different framerates: maximums are either ~8500 or ~11500 Reply to Thread
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  Topic Review (Newest First)
10-29-2019 06:30 PM
qsxcv tranquil: yea sorry i mean like counts registers (from which the mcu reads via spi), not the raw data.

the1: i doubt it
10-29-2019 08:37 AM
the1freeMan Could the reason for the 70% clock simply be stability? I plotted my g303 the other day and it gives different plots every time. Kinda like the early fw g403 and the revel too actually.
10-29-2019 07:04 AM
TranquilTempest
Quote: Originally Posted by cdcd View Post
Does this only apply for the highest framerate mode? In practice, what would the difference between a frame rate of 15000 with the data registers being updated every other frame and a frame rate of 7500 with the data registers being updated every frame be?
Physical speed of the mouse across the pad can be higher with a higher framerate, because there will be more overlap of the image taken by the sensor compared to the previous image.

Though "data registers" is ambiguous. If you're talking about the registers the MCU reads from that's one thing, but if you're talking about the registers the image data is stored or processed in, that's effectively the same thing as reducing framerate.
10-29-2019 06:48 AM
cdcd
Quote: Originally Posted by qsxcv View Post
but for whatever reason, in the highest framerate mode, the data registers update only every other frame, so as far as mousetester plots are concerned, it appears as ~7500.

i suspect 3310 does something similar. can't be bother to check right now.
Does this only apply for the highest framerate mode? In practice, what would the difference between a frame rate of 15000 with the data registers being updated every other frame and a frame rate of 7500 with the data registers being updated every frame be?
10-28-2019 10:31 PM
qsxcv
Quote: Originally Posted by qsxcv View Post
there's some register that controls framerate?
just got a cheapo logic analyzer to look at the power on procedure of my g pro (3366), which runs at ~8500 max framerate.

Quote: Originally Posted by qsxcv View Post
clock tuning:
registers 0x3d and 0x4f control the clock frequency of the sensor in run and rest mode, respectively
toggling on the msb of one of the registers (e.g. writing 0x96) causes the 3366's pin 14 to output a square wave with frequency related to the bottom 5,6,or 7 (not sure) bits of the register (see second sheet of the google doc above). the g502 adjusts the value of the register until the square wave frequency is as close to 1000hz as possible. usually the adjustment is quite coarse and the final values are off by 20hz or so. to disable the square wave toggle off the msb of whichever register had it on. changing the register's lower bits while the msb is 0 doesn't do anything.
instead of 1kHz, it targets 700Hz (logitech why...???)
i think all the clocks in the sensor scale proportionally, and indeed 70% is close to the ratio in the title 8500/11500.


semi-related but posting here for reference: strictly speaking 3389's max framerate (~15000 or so) is higher than 3360/3366's. i checked on scope attached led pin. but for whatever reason, in the highest framerate mode, the data registers update only every other frame, so as far as mousetester plots are concerned, it appears as ~7500.

i suspect 3310 does something similar. can't be bother to check right now.
06-19-2019 08:37 AM
ashr @qsxcv
I decided to use my G303 again and noticed immediately that it felt much sharper than the G Pro. I know you said you couldn't tell the difference but I'm just curious now why both mice feel so different to me, could it really just be the shape of the mice causing this?
06-18-2019 02:56 PM
qsxcv more puzzles...
i found that i wrote this in one of my emails in 2016:
Quote:
I'm even more confused. when I load srom 0x08 on the g502 board, the framerates are all too low (by ~30%). no idea what's going on there. I took srom 0x08 from a g303, which was for sure getting normal framerates.
and, 30% is roughly the difference between 8500 and 11500

3 possibilities:
hardware differences between different 3366s
there's some register that controls framerate?
srom differences + me not being careful?
05-06-2019 05:43 PM
IAMSTERDAM *** why 3389 is so bad on IE PRO 7200-7300 fps?
i have new ie pro and dm1 rpo s - dm1 - feels faster and smoother and more responsiveness.. is that fps diffrences?
use 400dpi on both mice...
i have old IE 3.0 6000fps and 9000fps
9000fps feels very nice
qsxcv - logitech mouses have the best fps sensors?
interesting results Glorious Odin but 3360.. predicted
05-06-2019 10:45 AM
the1freeMan
Quote: Originally Posted by Kim Sunjun View Post
I compiled a small python script that automatically calculates the estimated frame rate...
Quote: Originally Posted by qsxcv View Post
nice, i've had that in mind for a long time but never got around to making it
actually what i had in mind was to remake mousetester and do a lot of things automatically, but life gets in the way

btw if you want to test your script more, a long time ago i made a mock data generator that outputs mousetester-type csv: https://www.overclock.net/forum/24401063-post387.html
(lol this was like a month after i first used python)



no it's 7200-7300
@Kim Sunjun

Did you fix the script?
04-05-2019 03:03 AM
Axaion Yep, Pro IME is 3389, its also 'advertised' as 12000 FPS

With my luck, mine could be faulty however, so if someone else would do a swipey swipe swipe, thatd be great!

iirc i was swiping it around 5.5m/s according to mousetester in my picture
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