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#apertus IRC Channel Logs

2019/03/16

Timezone: UTC


02:48
apurvanandan[m]
nick apurvanandan|away
02:48
apurvanandan[m]
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03:28
futarisIRCcloud
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apurvanandan|awa
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BAndiT1983|away
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futarisIRCcloud
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se6astian|away
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BAndiT1983
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se6astian
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se6astian|away
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RexOrCine
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apurvanandan
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BAndiT1983
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09:00
Bertl_oO
off to bed now ... have a good one everyone!
09:00
Bertl_oO
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10:06
BAndiT1983|away
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BAndiT1983
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BAndiT1983|away
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BAndiT1983
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BAndiT1983|away
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Dev_
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12:59
Dev_
Hey BAndiT1983 , Kindly check <PM> , if u get time
13:15
BAndiT1983
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Dev_
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se6astian
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apurvanandan[m]
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se6astian|away
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elkos
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16:07
Millie_
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16:10
Bertl_zZ
changed nick to: Bertl
16:10
Bertl
morning folks!
16:11
Millie_
Hello how is the data word can be adjusted (bitslip)? i dont understand it
16:16
Bertl
hey Millie_!
16:17
Bertl
let's assume there is a bitstream on the input consisting of 8 bit words (data)
16:17
Bertl
...00001111000011110000111100001111...
16:17
Bertl
now there are several ways to 'read' this as 8bit words
16:18
Bertl
for example:
16:18
Bertl
...000|01111000|01111000|01111000|01111...
16:18
Bertl
or
16:18
Bertl
...0|00011110|00011110|00011110|0001111...
16:19
Bertl
now if we 'know' the data currently sent is a specific pattern, like for example 0xF0 then we can 'adjust' the deserializer to match that
16:19
Bertl
...0000|11110000|11110000|11110000|1111...
16:20
Bertl
this is typically done with a so caled 'bitslip' operation which basically drops one bit from the input stream
16:21
Bertl
depending on how many bits you are off, you repeat this 'operation' to align the captured word with the expected pattern
16:24
Millie_
In that example ihave to drop 3 zeros to match that pattern?
16:24
Bertl
you drop 3 bit, yes, doesn't need to be zeroes :)
16:26
Millie_
Should i consider that the bitslip is an input signal to my component
16:26
Millie_
Or i will calculate that shift
16:26
Bertl
I presume you picked the VHDL challenge task 1?
16:27
Millie_
Yes iam in task 1 vhdl sorry i didnt mention that :)
16:28
Bertl
no problem, there you do not need to worry about the shift, just provide an input to 'drop' a bit
16:30
Millie_
Should it be the least or the most significant bit
16:31
Millie_
That will be dropped
16:34
Millie_
Can i ask another question?
16:41
Dev_
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16:43
Bertl
LSB or MSB depends on the interpretation of the word
16:43
Bertl
you can only drop 'a' bit in a stream of bits
16:43
Bertl
and yes, ask away, that's what we are here for
16:45
Millie_
Great :)
16:46
Millie_
How i will write a serdes code and i can use existing hardened units like DDR or SERDES
16:46
Millie_
?
16:47
Millie_
Should i use ip cores
16:49
Bertl
you can use hardened IP, i.e. elements or primitives available on a specific hardware (e.g. 7Series or MachXO2)
16:50
Bertl
as it is all about FOSS/OH do not use anything you do not have the source for
16:52
Millie_
Ok thank you :)
16:52
Bertl
you're welcome!
16:52
Millie_
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17:23
intrac
experimenting with filmic desaturation of highlights: https://i.imgur.com/YUSRV8g.jpg
17:24
intrac
+ some colour adjustments
17:24
Dev_
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illwieckz_
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19:37
BAndiT1983|away
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20:55
kwezy
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21:00
Bertl
off for now ... bbl
21:00
Bertl
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21:11
BAndiT1983
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21:40
BAndiT1983|away
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22:06
se6astian
intrac: very nice, we noticed already that the PLR mode has this as inbuilt side effect
22:07
se6astian
highlights loose saturation
22:07
se6astian
off to bed
22:07
se6astian
good night
22:07
se6astian
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illwieckz
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23:11
BAndiT1983
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23:51
niemand
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