| 01:40 | RexOrMatrix[m] | <se6ast1an "https://www.imdb.com/title/tt605"> Yeah I read about that. Think it's something to do with the Idyllwild Egg case. An egg shaped object from outer space landed in some woods and passing hill-walkers and camping types got probed.
|
| 01:47 | RexOrMatrix[m] | BAndiT1983: Come to the Telegram group.
|
| 01:56 | Nira | changed nick to: Nira|away
|
| 02:06 | comradekingu | left the channel |
| 02:20 | comradekingu | joined the channel |
| 03:10 | RexOrCine | joined the channel |
| 06:20 | BAndiT1983|away | changed nick to: BAndiT1983
|
| 08:07 | sebix | left the channel |
| 08:07 | sebix | joined the channel |
| 08:19 | BAndiT1983 | changed nick to: BAndiT1983|away
|
| 09:41 | BAndiT1983|away | changed nick to: BAndiT1983
|
| 10:00 | Bertl_zZ | changed nick to: Bertl
|
| 10:00 | Bertl | morning folks!
|
| 10:04 | comradekingu | left the channel |
| 11:23 | BAndiT1983 | changed nick to: BAndiT1983|away
|
| 12:07 | Nira|away | changed nick to: Nira
|
| 12:40 | BAndiT1983|away | changed nick to: BAndiT1983
|
| 12:42 | RexOrCine | left the channel |
| 12:51 | RexOrCine | joined the channel |
| 13:46 | aombk | left the channel |
| 14:12 | BAndiT1983 | changed nick to: BAndiT1983|away
|
| 14:12 | BAndiT1983|away | changed nick to: BAndiT1983
|
| 14:18 | BAndiT1983 | changed nick to: BAndiT1983|away
|
| 15:16 | aleb | left the channel |
| 15:21 | aleb | joined the channel |
| 15:25 | aleb | left the channel |
| 15:26 | apurvanandan[m] | Hello Bertl, My BER Testing code is now working perfectly on remote beta at DDR x4 300 MHz with BER lower than 10^-12 :)
|
| 15:27 | aleb | joined the channel |
| 15:28 | Bertl | apurvanandan[m]: great! what was the problem?
|
| 15:28 | apurvanandan[m] | The problem was: though MachXO2 all LVDS_P were connected to _N pins of MachXO2, On Zynq also the LVDS_2 and LVDS_3 were labelled opposite ie _P on _N and vice versa. So that made them correctly connected, hence I removed the not of signal on Lanes 2 and Lane 3 and it got working
|
| 15:29 | apurvanandan[m] | TL;DR Not only machXO2 had opposite labelled pins but the Zynq also had this on LVDS2 and LVDS3 lanes
|
| 15:29 | Bertl | you reported problems with LVDS_0 yesterday though?
|
| 15:30 | apurvanandan[m] | I missunderstood the right one as wrong because two lanes next to it were wrong
|
| 15:30 | Bertl | okay, what is the total datarate with the current setup?
|
| 15:30 | apurvanandan[m] | The FT601 issue isn't resolved till yet, it needs further research
|
| 15:31 | apurvanandan[m] | But the LVDS are giving 2.4Gbps bandwidth
|
| 15:31 | Bertl | well, that needs some improvements as well then :)
|
| 15:31 | apurvanandan[m] | And the DDR x4 still doesn't work at 375 MHz
|
| 15:32 | apurvanandan[m] | Yes, I am here after GSoC. I will definitely make everything perfect
|
| 15:32 | Nira | changed nick to: Nira|away
|
| 15:33 | Bertl | does the dynamic delay work as expected now?
|
| 15:33 | aleb | left the channel |
| 15:34 | apurvanandan[m] | Delays are working as expected, The issue was that delay mode was set to ECLK_ALIGNED, I set that to USER_DEFINED. Now they obey the value set by me
|
| 15:34 | apurvanandan[m] | 0.01% BER at DELAY0 , and 10^-12 BER at DELAY8
|
| 15:34 | apurvanandan[m] | Where each delay tap = 105 ps
|
| 15:34 | Bertl | nice
|
| 15:35 | Bertl | and did you try different delays at 350/375MHz yet?
|
| 15:35 | apurvanandan[m] | Implying 8 delay taps = 840 ps = 1/4 * 3.333 ns
|
| 15:35 | apurvanandan[m] | I tried delay settings at 375 MHz , but they didn't work
|
| 15:36 | Bertl | means you always got bad BER or did it show some effect?
|
| 15:37 | aleb | joined the channel |
| 15:37 | apurvanandan[m] | Yes I didn't try all 32 values, let me do that please
|
| 16:37 | apurvanandan[m] | Bertl, It is working, I forgot to change the timing contraints earlier, now the throughput is 2.94 Gbps as reported by FTDI chip
|
| 16:37 | apurvanandan[m] | 10^-12 BER at 375 MHz
|
| 16:37 | Bertl | nice
|
| 16:38 | apurvanandan[m] | Thanks
|
| 16:38 | Bertl | that's over 5 LVDS channels plus one clock
|
| 16:38 | apurvanandan[m] | Yupp
|
| 16:39 | Bertl | and you are testing/using 8b10b at the moment, correct?
|
| 16:39 | apurvanandan[m] | Yes, I am
|
| 16:39 | Bertl | so the raw bandwidth is about 3.7Gbit
|
| 16:40 | Bertl | you are also using the 8b10b control symbols I presume?
|
| 16:41 | apurvanandan[m] | Yes I am using K28.5, but will add more funtionality
|
| 16:41 | Bertl | what is K28.5 used for at the moment?
|
| 16:41 | apurvanandan[m] | Just for word alignment, could have used 0000011111
|
| 16:42 | Bertl | and is the BER on the 10bit or 8bit side of the encoder?
|
| 16:42 | apurvanandan[m] | 8 bit side
|
| 16:42 | Bertl | okay, can you do 10bit BER checks as well?
|
| 16:43 | apurvanandan[m] | Please allow me to do it after making documentation
|
| 16:43 | apurvanandan[m] | I am short on time for it
|
| 16:43 | Bertl | fair enough, focus on the documentation
|
| 16:45 | sebix | left the channel |
| 17:23 | Bertl | off for now ... bbl
|
| 17:24 | Bertl | changed nick to: Bertl_oO
|
| 17:45 | BAndiT1983|away | changed nick to: BAndiT1983
|
| 17:52 | BAndiT1983 | changed nick to: BAndiT1983|away
|
| 18:07 | aombk | joined the channel |
| 18:12 | comradekingu | joined the channel |
| 18:22 | comradekingu | left the channel |
| 18:22 | comradekingu | joined the channel |
| 18:47 | Nira|away | changed nick to: Nira
|
| 18:48 | niemand | joined the channel |
| 19:30 | comradekingu | left the channel |
| 19:38 | aombk | left the channel |
| 19:40 | aombk | joined the channel |
| 21:08 | niemand | left the channel |
| 21:23 | se6ast1an | off to bed, good night
|
| 21:58 | BAndiT1983|away | changed nick to: BAndiT1983
|
| 00:56 | comradekingu | joined the channel |