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#rockbox log for 2020-08-26

00:08:07 Join ac_laptop [0] (~ac_laptop@186.2.247.129)
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01:13:29 Join __Bilgus [0] (41ba23be@65.186.35.190)
01:16:36__Bilgusspeachy ( logs) Xduoo X3 battery bench 12 hours https://pastebin.com/L2Yb1A6V
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08:36:55fs-bluebot_Build Server message: New build round started. Revision f791df1, 280 builds, 9 clients.
08:36:56***Saving seen data "./dancer.seen"
08:40:06speachy__Bilgus, a recalibrated curve and runtime current estimates are now committed.
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08:50:54fs-bluebot_Build Server message: Revision f791df1 result: All green
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08:56:44speachythat 12h runtime represents 50% better than the manufacturer's claims.
08:58:33johnb2There exist 2 different batteries: one with 1500 mAh (model has a button ESC, one with 2000 mAh).
09:00
09:02:15speachyjohnb2: for the x3 you mean?
09:02:28johnb2yes
09:02:53speachyprobably isn't any way to tell them apart at runtime though..
09:03:12johnb2maybe the website still refers to the first version (1500) or RB is doing better.
09:03:29johnb2No, probably not.
09:04:05johnb2AFAIK, it is just different labeling and different battery for the two models.
09:04:06speachyI don't think the OF utilized dynamic clocking, if the other ingenic/linux-based players are any indication.
09:04:57johnb2I used to have an X3 a few years ago - and just ordered one seeing you working on it ;-)
09:05:01 Quit akaWolf (Ping timeout: 264 seconds)
09:05:53johnb2I found some better photos of the device taken apart in a German forum and asked the guys whether I can upload them to the wiki.
09:06:36johnb2On head-fi some folks replace the dark screen with some transparent plastic.
09:07:09johnb2These photos show the screen from inside:
09:07:26johnb2http://www.hifi-forum.de/viewthread-125-9819-2.html#91
09:08:50johnb2In this thread they have a link to a replacement battery on Aliexpress, which are hard to find.
09:08:53 Join pamaury [0] (~pamaury@rockbox/developer/pamaury)
09:09:09johnb2Is it ok to add a link to it on our Wiki (X3 page)?
09:10:10 Join __bILGUS [0] (41ba23be@65.186.35.190)
09:10:27__bILGUSJOHNB you never cease to amaze me lol
09:15:02johnb21500 is the older version, BTW.
09:18:14speachyjohnb2: I ordered five of those batteries a couple of months ago. one's in my X3 now. they're not an exact replacement though.
09:18:28speachyand yeah, go ahead and add the link.
09:18:53speachyI assume the second internal photo is the smaller-capacity battery?
09:22:16johnb2That tiny Picture from post 93? He wrote, that it was glued too heavily, so he didn't want to rip it off to check capacity.
09:23:11speachythe aliexpress batteries have a regulator IC and are slightly shorter on the long dimension than the original.
09:23:54speachyalso slightly thicker. If I tighten down the case screws all the way a couple of the buttons don't operate properly.
09:24:24johnb2I read some threads where they said the player/battery got very hot during charging.
09:24:45johnb2Maybe that's without the protection circuitry.
09:26:20speachyyes. two reasons for that −− the first is that the CPU was running flat-out, even when idle. the second is due to the charging/battery circuitry.
09:26:40speachythe CPU is clocked _far_ lower now, and it's probably feasible to drop it further.
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09:35:02speachycan't do anything about the fact that the USB power supply circuitry seems to always draw over a watt.
09:35:15speachy(charging is purely HW controlled)
09:35:23__bILGUSI dig that leather case idea
09:36:20__bILGUSwe can turn the charging on and off we could do d duty cycle of 3 on 2 off\
09:36:29__bILGUSIf
09:36:50__bILGUSgive it a cool down period
09:37:09speachy__bILGUS we are supplied a GPIO that tells us if we're charging. that's it.
09:37:34__bILGUSoh well that expected I suppose but unfortunate
09:39:35__bILGUSI was writing asm in god bolt lastnight no clue where the code for greydata came from in C but for one it doesn't go at 8bytes a pop it goes by a single byte and I think some of the logic is off on the shifts
09:40:27__bILGUSI'm secent at arm asm so i'm back porting the clip+ routine to c
09:40:58__bILGUSdecent, (not typing though apparently)
09:41:22speachyfixed the typo on the charger IC.
09:41:36speachyMCP73_8_63. :)
09:43:04speachyhas no external comms capability. I'd be willing to bet that there's no temperature sensor hooked up to it.
09:44:06__bILGUSthat is a bit scary guess this gets a metal box to charge in along with samsung devices
09:44:45__bILGUSminus the back it kinda in a metal box
09:47:09speachywonder if there's a drop-in replacement for that SSD1306 screen that doesn't suck so much.
09:48:44speachyso.. I guess the original battery curve as committed is the 1500mAh unit. that explains the patch in Poretsky's tree to hack in two battery types
09:50:19__bILGUShow did he do it as far as selection goes?
09:50:42__bILGUShow did he do it as far as selection goes?i think a menu with settable mah values would suffice
09:50:52speachythe discharge curves are pretty different
09:51:03speachythere's already an option in the UI to select battery capacity
09:51:27__bILGUShow did he do it as far as selection goes?i think a menu with settable mah values would sufficei thought so after I said that
09:51:37speachyhe abused the "battery type" configuration that was intended to select between alkaline and NiMH cells
09:52:08__bILGUSoh that is a decent idea
09:53:00speachyhttps://github.com/poretsky/rockbox/commit/4ee2b53a449fa740ef38056b9197ad7d8e77c71a
09:53:04__bILGUSyou could also just infer
09:57:00 Quit sakax (Read error: Connection reset by peer)
09:57:13johnb2speachy https://cdn.head-fi.org/a/8657630.jpg shows how the tinted screen eats up the brightness of the display.
09:57:22 Join sakax [0] (~r0b0t@unaffiliated/r0b0t)
09:57:46__bILGUSno I guess you couldn't was gonna say if runtime is > 6 hrs switch it but that would be annoying to have to run the first build for >6 hrs to get it to calibrate
09:58:46speachyjohnb2: yeah, I should do that to mine. but I was thinking a higher-res screen in the same physical case/board footprint.
09:58:52__bILGUSjohnb that is significant I wonder if I could get glass waterjet cut like that
09:59:18__bILGUSspeachy that screen reminds me of the Clip+ its not that bad
09:59:44speachyit's the same resolution as the clip+ but even without the tinted window it's a lot dimmer.
10:00
10:00:19__bILGUSwe can probably up the drive strength
10:01:43__bILGUSI think for the glass if I could get a rectangle blank of the right size I coul probably radius the corners with a diamond wheel
10:02:33speachy__bILGUS: we're already maxing out the brightness. I think anything else would require hardare mods.
10:03:30__bILGUSI'd have to look at the lcd code a bit closer but we should be able to set olded drive strength independent of brightness
10:04:22__bILGUSor irrespectivelying
10:04:56speachyI think changing that will require a hardware mod. section 8.8 of the SSD1306 datasheet
10:05:15__bILGUSoh and it has a 'dim mode setting' on the lcd controller wonder what that does
10:07:09speachyI don't see any reference to "dim mode", what version of the datasheet are you referencing?
10:07:19johnb2https://www.head-fi.org/threads/rockbox-xduoo-x3.803844/page-144 : they use a Nintendo replacement screen as replacement for the "window"
10:07:27__bILGUSwell poop these are very rigid hardware as far configurability goes
10:08:29__bILGUSjohnb the plastic makes it feel cheap
10:09:18__bILGUSpiece of thick soda glass with some polish would raise it a bit out of case and feel very nice under finger
10:09:20speachyhuh, they cut the DS screen cover down.
10:09:28johnb2That is true :-) but probably rather easy to implement.
10:09:58__bILGUSill be doing it before I start using this in my truck
10:10:27speachy__bILGUS: word of warning −− this thing gets _hot_ when left in the sun.
10:10:31__bILGUSspeachy https://cdn-shop.adafruit.com/datasheets/SSD1305.pdf
10:10:58__bILGUSI'm in the habit of bringing it in in the summer
10:11:05speachy__bILGUS: that's the 1305, not the 1306..
10:11:37__bILGUSI found it by looking for the commands I didn't see anything listing the LCD controller
10:12:00speachyhttps://cdn-shop.adafruit.com/datasheets/SSD1306.pdf
10:12:10speachyno dim mode on the 1306
10:13:34__bILGUShow did you decide it was a 1306?
10:14:03speachy1306 is 128x64 resolution. 1305 is 132x64
10:15:42__bILGUScrowd goes wild, you powers of dadduction have exceded my own
10:15:58__bILGUSlol
10:16:07speachyno idea about the actual OLED display though.
10:16:28__bILGUSand they probably dont either
10:17:18__bILGUSwell this should make my lcd exploration a bit simpler
10:18:31__bILGUSdamn I was excited when I thought it had that split screen like the clip+
10:19:06speachywell, you could swap out the display with one of those if you felt so inclined. :)
10:20:03__bILGUSnah thats just too much trouble
10:21:03__bILGUSwonder if this one has a dma too
10:21:07speachyjohnb2: were there actual links to the screens they used? I'm having a hard time finding something that's not a "stick-on"
10:22:31johnb2yes, but don't recall them. They said, just search for Nintento DS replacement screen on *bay
10:22:46johnb2which I did. They were around 8 bucks.
10:22:55speachy__bILGUS: I don't think we can take advantage of the 4760's LCD controller.
10:23:29johnb2https://www.ebay.com/itm/ZedLabz-replacement-screen-lens-plastic-cover-for-Nintendo-DS-Lite-NDSL-Black/372145611157?hash=item56a59b6195:g:asUAAOSwZNhfD6XP
10:24:09johnb2that should yield two screens
10:24:17speachy__bILGUS: and we have to drive.. 12 pins?
10:26:08speachyhmm. the bitdelay() function isn't sane given the CPU reclocking.
10:27:17__bILGUSthat area I don't believe to be sane in multiple ways
10:27:42__bILGUSI'm still playing with it atm
10:29:20__bILGUSi think the display is in parallel mode
10:29:31speachyyes, it's parallel in the 8080 mode, I believe.
10:29:41speachythat bitdelay needs to be >=40ns
10:29:42__bILGUSconcur
10:29:59speachy(it's really the "data setup time")
10:30:11__bILGUSthat probably explains some of the grey lib wonkyness good catch
10:30:41speachycould probably use one of the many HW timer peripherals to do this, assuming the pin can be remapped.
10:35:49speachyhuh, this thing has a PS/2 keyboard controller
10:37:00***Saving seen data "./dancer.seen"
10:38:15__bILGUSkitchen sink?
10:45:20speachyokay, we can't rely on the LCD controller or any HW peripherals to accelerate this
10:46:44speachythe I/Os used for the display are only muxed to the display controller and GPIO.
10:50:05speachyI'm using the OS Timer to implement udelay, we can piggy back on that (or do something similar with another timer) for the lcd delays.
10:50:12speachys/lcd/oled/
10:54:18__bILGUSthat is probably sufficient I think thats how I did it for the Clip+ rewrite or maybe that was the SD
10:58:30speachyugh, my udelay is actually mdelay. oops.
11:00
11:02:52speachyif I switch it to using PCLK rather than EXCLK, that'll give us a 96MHz base.
11:03:16speachywith a prescaler of 4, that'll give us 24 clocks per us, which is coincidentally 41ns.
11:04:18speachymake that 42ns. so with that we'd have a worst-case 84ns setup time.
11:05:19speachythe next lowest prescaler is 1.. 10.41ns per tick, worst-case setup time of 52ns
11:05:53speachywant me to make that change?
11:07:13__bILGUSsure I pull in the new stuff before I finish the grey routine
11:07:21__bILGUSI'll*
11:07:55__bILGUSI should probably do that on master and try it too
11:18:02 Quit johnb2 (Quit: Nettalk6 - www.ntalk.de)
11:19:29speachyokay, it's written. appears to work.
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11:59:04fs-bluebotBuild Server message: New build round started. Revision f4bf27c, 280 builds, 9 clients.
11:59:19speachy...the new udelay() function was completely _broken_.
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11:59:26speachyembarrasingly so
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12:01:14speachy__bILGUS:g#2697
12:01:16fs-bluebotGerrit review #2697 at http://gerrit.rockbox.org/r/2697 : xduoox3: Fix delay funciton in LCD code to be cpufreq-agnostic (WIP) by Solomon Peachy
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12:07:11speachyIt's running on my player now.
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22:26:33__builtinspeachy: out of curiosity, how are you generating those screenshots?
22:26:44__builtinmanually or fancier?
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22:38:20speachyvia the uisim screenshot hotkey
22:38:45speachyif I wanted to be clever I could probably take the clipplus screenshots and convert them to all the same solor.
22:39:05speachyIf I wasn't going through the manual to fill in keymaps too it would be a lot faster..
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