#1

looking for help figuring out how to use grid/led/row, grid/led/col, grid/led/map osc commands.
"Each number in the list is a bitmask of the buttons in a row, one number in the list for each row being updated.

examples (for 256)

/grid/led/row 0 0 255 255
/grid/led/row 8 5 255

examples (for 64)

/grid/led/row 0 0 232
/grid/led/row 0 3 129"

what is a bitmask? how do u determine the bitmask values for the buttons u need lit?

#2

the entire row is coded in binary. what you’re looking for is binary to decimal conversion.

ie:

11111111 = 255 (all on)
00000000 = 0 (all off)
10001000 = 136 (col 0 and 4 on)

row can take two 8-bit numbers, so it is a row of 16.

http://www.binaryhexconverter.com/binary-to-decimal-converter

if you want to get in deeper: https://en.wikipedia.org/wiki/Bitwise_operation

#3

Thx for the info! : )

#4

having one more problem. i’m trying to do varibright row messages and not getting any led feedback.
docs say it should be “/grid/led/level/row x_off y l[…]”

what would be the proper formatting for this message?
/monome/grid/led/level/row 0 0 7 255 255
(prefix is set to monome)

#5

the proper format for led/level/row is individual brightness levels for every led, e.g. /monome/grid/led/level/row 0 0 15 15 15 15 7 7 7 7. you can send 8 or 16 levels in one message.

#6

cool, i get it now. thx!

#7

Wow, now i get it ! Makes sense ! thank you !!

#8

okay, this is making more sense to me than ever before, so thanks tehn!

One question, how would i make a rotating register?

e.g.
0 0 0 0 0 0 0 1
0 0 0 0 0 0 1 0
0 0 0 0 0 1 0 0
…etc

obviously i need to be counting from 0 to 7 but then what? * 8 and <<? this simple math would probably be easier if I paid more attention in high school…

um… in short, i wanna make only one LED drop down in a column instead of a typical LED binary counter “stacking”.

#9

If you’re using Max you can try the object [zl rot]. But it depends on what you’re trying to accomplish, and what you need to use to get there :smile:

#10

Raja previously had a really dense monome tutorial maxpat which explained bitmasks pretty thoroughly, he may still have that available somewhere, that was where this finally clicked for me …

but if I’m understanding you correctly, w/o getting too far into the binary-ness (tehn’s link does a much better job of getting into that) a pretty quick way to do this with bitmasks would be to counting from 0-7 but raise 2 to the power of these integers like this :

2 ^ 0 = 1
2 ^ 1 = 2
2 ^ 2 = 4
…
2 ^ 7 = 128

if you send these to the grid using the /grid/led/col/ osc commands this should give you what you’re looking for.

1 Like
#11

Raja’sLilMonomaxTutorial.zip (2.9 MB)

Raja’sLil’SamplingTutorial.maxpat.zip (801.4 KB)

raja’s tutorial or the url that hosted it seem to be gone now. Found the files in my hdd and uploaded it. Would be a pity if its gone from the net.

3 Likes
#13

thanks to both of you! @tambouri I’m a slowly recovering math-phobic (studying music theory and aural skills helped immensely), thanks for letting me “look in the back of the book” for the answer to that one.

@pathein thank you so much for those files! I had them on my main external HD but it’s in the states in storage, and I had been scouring the internet for them!!