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| 08:19:45 | speachy | on an unrelated note, on a whim I picked up an STM32H747-DISCO board with a goal of doing a rockbox port for it. |
| 08:29:45 | speachy | 480MHz Cortex M7 (+240MHz CM4), 1MB on-chip SRAM, 32MB off-chip SDRAM, SD card, WM8994 audio codec (4ch, 96KHz@24-bit), 4" 480x800 touchscreen, 6 buttons, SD card slot, etc. |
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| 08:32:54 | speachy | it'll be a lot of work but ultimately the low-level Cortex-M stuff will be reusable, and the STM32 family as a whole is pretty similar. |
| 09:00 |
| 09:54:50 | _bilgus_ | it sounds excellent |
| 09:55:03 | _bilgus_ | likey why you picked it eh? |
| 09:55:40 | _bilgus_ | doing runtime tests I did test the right thing as its literally 2x faster I just screwed up implementing it |
| 10:00 |
| 10:05:16 | speachy | yeah, I had intended to pick up a 3rd party board for a while now but when ST makes a full on reference board that does everything we'd need, why not? |
| 10:05:47 | speachy | I have a pile of other STM32 boards for other projects over the years, but nothing with external RAM |
| 10:15:27 | _bilgus_ | https://www.st.com/en/evaluation-tools/stm32h747i-disco.html their pic hides the thickness a bit what is it without the ethernet and composite ports? |
| 10:16:28 | speachy | eh, it's big. |
| 10:17:17 | speachy | but with the display attached it's a wash |
| 10:19:34 | Xogium | stm32 is awesome |
| 10:19:37 | Xogium | ;) |
| 10:19:46 | _bilgus_ | thing is you could probably get it down to about 1" thick nd get a case printed it would at the very least be a great home theatre player |
| 10:20:03 | Xogium | the entire memory map is the same across the whole line |
| 10:20:13 | _bilgus_ | ethernet and composite probably make sense to leave |
| 10:21:17 | Xogium | and I have a feeling the integrated memory protection unit can come in handy for rockbox, very handy indeed |
| 10:23:38 | speachy | The MPU is not likely to be of much practical use unless we get less efficient with memory use. |
| 10:24:06 | Xogium | oh ? I'd have thought it could be of some use |
| 10:24:17 | speachy | (and make our "OS" considerably more capable) |
| 10:24:38 | Xogium | well, maybe one day ? ;) |
| 10:25:29 | speachy | even on "Real" operating systems we do everything in a single process. |
| 10:25:43 | Xogium | ah. That makes sense |
| 10:26:05 | _bilgus_ | winamp and vlc have plugins.. |
| 10:26:36 | _bilgus_ | they would eat your lunch so might as well just customize those in that case |
| 10:26:48 | _bilgus_ | we target small |
| 10:28:21 | speachy | I've wanted to replace our core "OS" with something like FreeRTOS. |
| 10:28:55 | Xogium | I thought that is what you used, actually :D |
| 10:29:44 | speachy | rockbox has been around longer than freertos |
| 10:29:45 | _bilgus_ | Youve probably got enough skills to do it.. time OTOH |
| 10:30:04 | _bilgus_ | but that core is also special |
| 10:30:09 | _bilgus_ | our current |
| 10:30:40 | _bilgus_ | how long after porting till you get to feature/stability parity would be |
| 10:30:41 | speachy | we're more of a cooperative system |
| 10:30:44 | _bilgus_ | the question |
| 10:30:52 | speachy | versus full preemption |
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| 10:32:05 | _bilgus_ | itd make some things easier and some vry much harder |
| 10:32:53 | speachy | from a core task scheduling + mutex/semaphores perspective, it's about the same |
| 10:33:29 | speachy | wouldn't use all that much of the rest. |
| 10:34:09 | speachy | we built a lot of our own bespoke infra because we had to, and those design choices are tightly woven into how we do things |
| 10:34:35 | _bilgus_ | yeah I run into them on occasion |
| 10:35:01 | _bilgus_ | tis the nature of constrained systems though too |
| 10:35:23 | speachy | I also want to see how well pthreads will work for our hosted targets. |
| 10:36:00 | speachy | it would remove a lot of the warts but at the expense of more memory usage. |
| 10:36:48 | speachy | (that's also necessary should we ever want to do bluetooth on the hosted targets..) |
| 10:37:30 | speachy | (we can't really mix our sigalstack threading with the native threading we need for that) |
| 10:37:39 | speachy | lots of ambitions, no real time |
| 10:39:18 | speachy | one downside to FreeRTOS is that MIPS and m68k were dropped by mainline some time ago. |
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| 12:42:33 | sonne | hello there! i just got an ipod 6g, installed a flash mod + 1TB sd and tried to rockbox it. i managed to install the bootloader and i *thought* i installed rockbox, but when i boot it goes into USB mode. i plug it, format as fat32, unzip rockbox and eject, but then it goes *panic*. any hints? |
| 12:43:10 | sonne | *PANIC* mount: 0 <−− this is the error |
| 12:43:36 | sonne | i can't use the automated installer as the dfu mode detection is borked for some reason |
| 12:45:50 | speachy | happens in reboot too? |
| 12:46:53 | sonne | speachy: not sure - how do i try a simple reboot? i'm doing centre+menu |
| 12:46:59 | sonne | but that's dfu mode isn't it |
| 12:47:02 | speachy | when in USB mode (rockbox? or apple?) what is the reported sector size and partition type? tbh I suggest you do an itunes restore to get the thing set up, and then do an itunes restore, then resize the partition after that. |
| 12:47:16 | sonne | > rockbox or apple <−− rockbox |
| 12:47:26 | speachy | partition table type, I mean. |
| 12:47:54 | sonne | it's what i did with parted |
| 12:48:18 | sonne | mklabel msdos > mkpart primary from 1 to -1 > mkfs.vfat -F 32 |
| 12:48:36 | speachy | what's the sector size? fdisk will tell you. |
| 12:48:37 | sonne | speachy: i tried doing the restore on a mac, it says that it can't find software for this ipod and errors out |
| 12:48:40 | sonne | sec |
| 12:49:31 | speachy | select+menu is supposed to restart the 6g. hold until the apple logo shows. |
| 12:49:32 | sonne | sector size is 4k |
| 12:49:59 | sonne | speachy: if i do that rockbox bootloader says no partition found and goes in usb mode |
| 12:51:21 | sonne | speachy: https://paste.debian.net/hidden/247caf98/ |
| 12:52:56 | speachy | okay, that's progress. |
| 12:53:07 | speachy | so it is usable as a USB drive from the bootloader usb mode? |
| 12:53:10 | sonne | yes |
| 12:53:20 | sonne | i can mount it and .rockbox is there |
| 12:55:32 | speachy | rename .rockbox to something else, curious to see how it acts. |
| 12:56:06 | sonne | same thing |
| 12:56:28 | sonne | *PANIC* / mount:0 / pc: 22021CAC sp:08800B38 / bt end |
| 12:56:34 | sonne | / = newline |
| 12:57:36 | sonne | if i do the select+menu long press it loads rockbox bootloader, then says "No partition found" and goes in USB mode |
| 13:00 |
| 13:01:36 | speachy | sonne: re-do the bootloader installation with this binary: https://www.shaftnet.org/~pizza/bootloader-ipod6g.ipod |
| 13:02:13 | speachy | if we're going to have to debug something, I want it to be the current code, not a fairly ancient bootloader build. |
| 13:02:47 | sonne | hmm not sure how to send it back to dfu mode now |
| 13:03:32 | speachy | https://files.freemyipod.org/~user890104/bootloader-ipodclassic-outdated.html#dfu |
| 13:04:24 | sonne | ace |
| 13:04:41 | sonne | ok flashed, what now? |
| 13:05:11 | sonne | behaviour is exactly the same, give or take a few numbers in the errors |
| 13:05:32 | speachy | should show the build info in the panic |
| 13:05:35 | sonne | yes |
| 13:06:02 | sonne | *PANIC* (7897cded2d-250219) |
| 13:06:57 | sonne | fwiw i was trying to install the nightly build, as the docs say versions up to 3.15 (latest stable) included have troubles with sd cards |
| 13:08:33 | sonne | oh now the partition layout is all wonky. there is a 128GB partition with junk data on it and 850GB free space |
| 13:09:20 | sonne | something to do with ipod 6g not being able to map storage addresses higher than 128G? though that should only be a problem with stock firmware |
| 13:09:52 | speachy | there's something about the partition table and/or filesystem that the bootloader doesn't like. |
| 13:10:12 | sonne | it's weird that the partition table got changed. |
| 13:10:26 | sonne | i tried with parted and cfdisk before, any better suggestion? |
| 13:11:06 | sonne | also, should i just redo the partitioning and undo whatever some goblin did to my SD after i reflashed the bootloader? |
| 13:11:33 | sonne | i'm a bit baffled if i'm honest |
| 13:12:28 | speachy | any interaction with apple's firmware will bust the storage |
| 13:12:36 | sonne | ah alright |
| 13:12:57 | sonne | i'll repartition then. any particularly kosher way to do it? |
| 13:13:38 | sonne | actually first i'll try to format the partition that it did itself and see what happens |
| 13:13:50 | speachy | seems reasonable |
| 13:14:46 | sonne | well i'll be |
| 13:14:52 | sonne | rockbox is loading |
| 13:15:10 | sonne | so now the big question is - was it my partitioning or was it the partition size? |
| 13:15:18 | speachy | after you hook up usb next, see what fdisk reports |
| 13:16:11 | sonne | speachy: https://paste.debian.net/hidden/7810c610/ |
| 13:16:45 | sonne | 512b sectors, could that be it? |
| 13:16:48 | speachy | uh... 512b sector size? wtf? |
| 13:16:55 | sonne | ¯\_(ツ)_/¯ |
| 13:17:06 | sonne | i'll fire up cfdisk and resize that partition |
| 13:18:09 | speachy | I did a lot of reworking of the storage subsystem to allow various sector sizes at runtime; apple's firmware infamously uses a 4K sector size for its partition/filesystems. |
| 13:19:19 | speachy | ...a 512B sector size won't even boot with the last "released" bootloader binary. |
| 13:21:21 | sonne | i can't resize it past 128G o_O |
| 13:21:27 | sonne | limit of the sector size? |
| 13:22:11 | sonne | i mean of course the partition itself is resized, but then i do fatresize -s max /dev/sdb1, it goes all thumbs up but nothing happens |
| 13:22:12 | speachy | no, should be workable up to 2TB. Unless.. we're only using the first 512B of each 4K sector? |
| 13:23:30 | sonne | why do i even bother with fatresize anyway? i can just reformat it |
| 13:23:48 | speachy | reformat yeah |
| 13:24:10 | sonne | so now it's 1TB and rockbox loads |
| 13:25:32 | sonne | not that i'm complaining... |
| 13:28:25 | speachy | ok, so fatresize broke it. |
| 13:28:37 | sonne | i didn't fatresize before though |
| 13:28:57 | speachy | I don't know why this was failing to begin with, but I'm glad it's operational in its current form. validates a lot of the storage work that's gone in. |
| 13:28:58 | sonne | instead of resizing the partition, i was redoing the partition table from scratch |
| 13:30:13 | sonne | speachy: i'm happy to have it operational, i'll never touch the partition table again :D |
| 13:30:18 | sonne | i do have a followup question though |
| 13:30:51 | sonne | since the automated installer wasn't working i had to do the manual install. the auto tool has a nice shortcut to download all themes and copy them over, do you know how i can do that by myself programmatically? |
| 13:31:03 | sonne | that is, without having to individually download themes from the browser |
| 13:34:28 | speachy | anything other than the bootloader install just acts as a simple USB device. |
| 13:34:37 | speachy | so rbutil will work. |
| 13:35:05 | sonne | so as long as i exclude the bootloader/os from the checklist i'm good? |
| 13:36:17 | sonne | looks like it :D amazing |
| 13:36:21 | sonne | speachy++ you're the best |
| 13:36:41 | speachy | nah, I'm just the current bear wrangler |
| 13:37:40 | sonne | thanks fr :) |
| 13:37:57 | sonne | i'll let themes download and install now for the rest of the evening probably, have a great day! |
| 13:38:07 | speachy | enjoy |
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