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#apertus IRC Channel Logs

2016/10/24

Timezone: UTC


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02:33
Topic
apertus° - open source cinema | www.apertus.org | join the apertus° Lab: http://lab.apertus.org/ | IRC Logs available at: http://irc.apertus.org
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se6astian
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Bertl_oO
off to bed now ... have a good one everyone!
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Bertl_zZ
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13:13
Bertl
morning folks!
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13:22
Bertl
alexML: I have code for the offset/gain correction and it is fine resource wise, I just have to write a testbench and see if it actually does what we discussed :)
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18:30
alexML
Bertl: nice, I'm ready to test it
18:33
Bertl
yeah, currently testing myself and fixing bugs :)
18:40
g3gg0
hey
18:41
Spirit532
I wish there was a microzed with a 7015 :(
18:41
Spirit532
I want to implement sata
18:44
Bertl
well, you can start with sata I on the microzed 7010/20
18:44
Bertl
it should then be relatively simple to extend it to MGTs
18:44
Spirit532
pretty much useless
18:44
Spirit532
you can go to parallel ports at that speed
18:45
Bertl
well, it's a quarter of SATA 6G, so not that extreme
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19:11
Bertl
alexML: http://vserver.13thfloor.at/Stuff/AXIOM/BETA/cmv_hdmi3_gain.bit
19:12
Bertl
I changed a few things in the logic, but it is basically what we discussed
19:12
Bertl
first, I removed the msb inversion on the offset
19:12
Bertl
the offset is 12 bit signed and gets simply added to 13bit signed
19:13
Bertl
for the gain, I dropped the '-1' part and just defined '1' to be 2^13 for now
19:14
Bertl
so 2^12 + 2^12 will give the expected gain of 1
19:15
Bertl
the gain extension is currently not active, i.e. the range is from 0 to 2 (for now)
19:16
Bertl
actually it is 2^12 and 2^11 ...
19:17
Bertl
the gain LUTs have been added to the end of the LUT memory
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Bertl
they are identical to the offset LUTs
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Bertl
LUTs are 12bit, the linearization LUT is 18bit (all 18 bits are used)
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Bertl
I haven't tested if the 18th bit of the linearization can be used properly (negative vs unsigned)
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Bertl
off for now ... bbl
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se6astian
I am off to bed
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se6astian
good night
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se6astian
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22:16
alexML
Bertl_oO: I get completely white pictures with the new firmware; I guess I need to set the gains to 0x1000, right?
22:16
alexML
https://dl.dropboxusercontent.com/u/4124919/bleeding-edge/apertus/rcn_clear.py
22:17
alexML
https://dl.dropboxusercontent.com/u/4124919/bleeding-edge/apertus/rcn_clear.diff
22:17
alexML
not sure what I'm missing
22:18
alexML
tried defaults, 0, random, 0x1000 - in each case, the output is pure white (4095)
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Bertl_oO
alexML: I'll check shortly
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00:36
Bertl_oO
hmm, there is an image there, but it is extremely saturated ... i.e. it looks like the default multiply is a lot larger than in my simulation
00:37
Bertl_oO
(or the offset might be to blame, have to check)
00:43
Bertl_oO
alexML: yeah, it's the clipping, if you turn off the RCN clipping, you get the 'normal' picture
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Bertl_oO
fil_reg 11 0xFC01F000
00:44
Bertl_oO
what I'm not sure yet is why we hit the clipping at all, because it shouldn't be the case with everything set to zero
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