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#rockbox log for 2020-07-09

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05:57:51efqwspeachy: I looked it up and apparently hiby r3[pro], shanling q1, m0, m2x are also using the X1000E SoC.
05:58:58efqwunfortunately those are all touchscreen devices so I don't think rb is going to work very well on them
05:59:33efqwsame goes for the recent me pro from fiio, that is a touchscreen device as well
05:59:39efqw*m3 pro
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07:35:14fs-bluebotBuild Server message: New build round started. Revision 5d8a1a3, 295 builds, 9 clients.
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08:01:08speachyefqw, there are quite a few more built on the x1000e, and if one includes the jz47xx SoCs, even more.
08:02:04speachyI'd wager that for the past decade, those SoCs comprise the majority of the mid-high end of the Chinese DAP market.
08:04:06speachythe likes of rknano and atj2127 on the low end.
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08:07:31speachy(ie stuff with only a tiny amount of on-chip RAM and hardware-based decoding)
08:13:38efqwYeah, I think xuelin had some of those RKNANOD stuff.
08:14:57efqwFiiO's X1 (1st gen, mark II and mark III) are all using JZ4760[B] I think.
08:15:55speachyI have a X1 (1st gen) in a box; the wheel is a little flaky so I got it for cheap.
08:17:30speachyif I find myself with more time than sense, I'll probably dust off that port and try to get it in usable shape.
08:18:12speachy(it was done prior to the xDuoo X3, and a lot of the outstanding MIPS issues have already been resolved)
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08:22:56pamauryI have some unfinished work on the JZ4760B and the Fiio X1 1st gen, I think most of it is on gerrit
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08:26:26pamauryour touchscreen implementation is really subpar though, it makes touchscreen-based targets not so nice to use
08:26:43speachyyeah, refactoring the common jz47xx code will probably be a decent amount of effort.
08:27:01speachyour touchscreen implementation sucks. no sense in being polite about it. :D
08:28:15speachyour entire UI is designed around use of dedicated off-screen buttons.
08:30:14speachytouchscreens require a completely different approach to things.
08:32:37efqwIs the jz47xx rb running on Linux or is it bare-metal?
08:32:47speachygranted we could sort of cheat and dedicate part of the screen to virtual buttons...
08:33:04speachyefqw, bare-metal
08:33:50speachyI think it's the most performant native target we have.
08:34:13efqwOh, I thought you were running rb on the 2.x BSP kernel, lol
08:35:21speachyI think the OF for all of the jz47xx targets runs on top of Linux(+hibyplayer)
08:37:43speachyI still want to implement CPU reclocking on the jz4760 to (vastly) improve its battery life..
08:39:19speachyspeaking of, I don't think the x1000e linux kernels have any meaninful power management turned on either.
08:40:55efqwThe battery life of the m3k is at least 14h on the stock firmware, which imo is actually decent already.
08:41:26efqw(continuous flac playback)
08:42:19speachyfiio probably tweaked things a bit. (I believe the rocker runs all-out)
08:42:35efqwspeachy: speaking of which, have you been able to disassemble the stock fw of the m3k and extract that libfiio.so?
08:42:44speachyhaven't touched it
08:43:06pamauryspeachy: the Fiio X1 1st gen doesn't use linux iirc, 2nd gen does
08:44:00pamaurybut most JZ-based devices use linux indeed
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09:00
09:02:47*speachy stands corrected.
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09:24:19fs-bluebotBuild Server message: New build round started. Revision 65a9133, 295 builds, 9 clients.
09:32:12speachypamaury, you have a truly epic amount of WIP patches in gerrit
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09:45:10fs-bluebotBuild Server message: Revision 65a9133 result: All green
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10:07:39fs-bluebotBuild Server message: New build round started. Revision b64a286, 295 builds, 10 clients.
10:09:42speachyless than 400 open gerrit changesets now, woo!
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10:26:22***Saving seen data "./dancer.seen"
10:30:10pamauryspeachy: yeah I know...
10:30:21pamauryand then it rots
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10:42:26fs-bluebotBuild Server message: Revision 278a76b result: All green
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14:02:09fs-bluebotBuild Server message: New build round started. Revision 77f8c9c, 295 builds, 10 clients.
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14:26:27***Saving seen data "./dancer.seen"
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14:30:49__builtinhehe, g#2512
14:30:50fs-bluebotGerrit review #2512 at http://gerrit.rockbox.org/r/2512 : Audio playback via piezo PWM (HACK) by Franklin Wei
14:31:03__builtintry it if you don't value your ears
14:38:27speachyit's nice to see an uptick of activity. even if it's of the ear-bleeding variety
14:39:04__builtinpart of me wants to merge that into mainline
14:42:51speachyit's arguably more useful than another FPS... :D
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15:00:06speachyIs g#1206 still relevant? It still applies, anyway..
15:00:08fs-bluebotGerrit review #1206 at http://gerrit.rockbox.org/r/1206 : [Superdom] Bugfix by Franklin Wei
15:01:08__builtinthere was definitely a bug, yes
15:01:10__builtinwhich I introduced...
15:02:05speachythere was also g#1014 which just disabled the code instead of fixing it
15:02:07fs-bluebotGerrit review #1014 at http://gerrit.rockbox.org/r/1014 : Superdom bugpatch: by Franklin Wei
15:03:32speachyoh, just before I forget −− Gerrit will now reject patches that don't have the Change-Id header. Apparently it wasn't enforcing it before.
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16:26:31***Saving seen data "./dancer.seen"
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16:30:59speachy g#2513 is an experiment −− it's a noticable difference on the PP ipods
16:31:01fs-bluebotGerrit review #2513 at http://gerrit.rockbox.org/r/2513 : settings: cache settings[i] lookup by Solomon Peachy
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16:39:03speachywith the new toolchain and optimization settings there's no difference.
16:40:37speachyincdently, new toolchain shrinks the binary size by 10% on the mini2g, and 7% on the ram size.
16:41:09speachyabout 70k each. that can't be coincidental.
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16:46:34mendelmunkisTIL: chip manufacturers don't like talking to me.
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16:48:11speachychipmakers don't generally like talking to folks that have order volumes under 7 digits.
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18:18:34fs-bluebotBuild Server message: New build round started. Revision 17a367e, 295 builds, 10 clients.
18:26:33***Saving seen data "./dancer.seen"
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18:34:57fs-bluebotBuild Server message: Build round completed after 983 seconds.
18:35:05fs-bluebotBuild Server message: Revision 17a367e result: All green
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19:18:05speachynow here's an oddity. if you look at the build.rockbox.org page, some entries have 7-character ids and others have 10.
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20:26:36***Saving seen data "./dancer.seen"
20:35:01fs-bluebotBuild Server message: New build round started. Revision c914b14, 295 builds, 9 clients.
20:41:21speachy...because older git clients defaulted to 7-char short hashes, newer ones 10-char. I updated the version script to use a fixed 10-char hash regardless of local git defaults
20:45:47speachywith that the gerrit hook can finally be told to use longer hashes.
20:48:43lemon_jesushey guys, I'm interested in doing some reverse engineering work on the iPod Nano 3g. I'm trying to run the notes exploit (using the codebase at https://github.com/jeanthom/ibugger) to dump the firmware, but the payload just puts my iPod into a bootloop. Has anybody successfully used this exploit on their nano 3g? it's unclear to me if this exploit
20:48:43lemon_jesusis even compatible with it. if this isn't the best way to dump/decrypt the 3g firmware, what is?
20:57:20fs-bluebotBuild Server message: Build round completed after 1339 seconds.
20:57:21fs-bluebotBuild Server message: Revision c914b14 result: All green
21:00
21:08:18 Quit ac_laptop (Ping timeout: 256 seconds)
21:08:24speachylemon_jesus, I don't think anyone still active knows anything about the nano3g.
21:14:27lemon_jesushmmmm... that's unfortunate. do you think anybody knows about the Pwnage 2.0 exploit in general? that one has even less documentation surrounding it.
21:19:50speachyno idea. this stuff way predates my active involvement here
21:27:52lemon_jesusdarn. okay, I'll keep you posted if I make any progress.
21:30:28mendel_munkis_think its time to revive the rockbox player with skywater PDK?
21:30:42mendel_munkis_(yes I know thats not happening)
21:31:28speachyI don't think there's much point in desinging a new ASIC
21:38:44speachywhen it's the rest of the player design that's going to bite us in the posterior..
21:40:33speachynot to mention small-volume manufacturing overhead
21:41:05mendel_munkis_I know I know
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21:42:50speachyI've wanted to do a port to a modern Cortex-M MCU but very few sample boards support both SDRAM and easily-attachable displays.
21:50:24speachyoh, and audio.
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21:55:08__builtinspeachy: easy, just PWM it with g#2512
21:55:10fs-bluebotGerrit review #2512 at http://gerrit.rockbox.org/r/2512 : Audio playback via piezo PWM (HACK) by Franklin Wei
21:55:56__builtinthe sound quality is surprisingly good if you balance the sample rate/PWM frequency
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22:00
22:13:48speachysomething like this: https://www.waveshare.com/product/open746i-c-package-a.htm
22:14:14speachyI inherited one of their older kits (the open407)
22:26:38***Saving seen data "./dancer.seen"
22:32:24speachythere's a higher-end version that's actually cheaper −− 480MHz Cortex-H7, 1MB SRAM (192K IRAM), 8MB external SDRAM, 2MB onboard flash.
22:37:01speachyplus enough peripherals to make even the elder gods slightly less grumpy.
22:45:25speachyand the MCU on that costs $8.68 in 1K quantities. vs $5 for an entire RPi Zero with 512MB RAM. :)
23:00
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