Hi all,
after bumping into it again, I think I may have narrowed down my particular issue a bit more - it seems it could be related to one of those not-quite-standard-SPI devices (cf. e.g. https://hackaday.com/2016/07/01/what-co ... wrong-spi/ ) which require MISO to be pulled high, only in this case it seems more borderline in nature and/or this somehow still relates to E9 on some aggregate level (please comment as you find applicable). Basically, if I don't pull SPI1 (in this case) MISO high immediately on startup, this seems to trigger some kind of anomaly situation that causes performance to drop significantly while also not being easily resolved once triggered; I'm not sure yet how warm/cold boot may be involved in said recovery or not but it's not as simple as just adding the pull-up code line back and all will be immediately back to normal after reboot. Unfortunately I have a tollgate coming up in a few days which means I don't want to mess too much with my development rig at the moment, so any further tracing will have to wait, but I figured I should post this here in the meanwhile.
Thoughts?
BR//Karl @xoblite
after bumping into it again, I think I may have narrowed down my particular issue a bit more - it seems it could be related to one of those not-quite-standard-SPI devices (cf. e.g. https://hackaday.com/2016/07/01/what-co ... wrong-spi/ ) which require MISO to be pulled high, only in this case it seems more borderline in nature and/or this somehow still relates to E9 on some aggregate level (please comment as you find applicable). Basically, if I don't pull SPI1 (in this case) MISO high immediately on startup, this seems to trigger some kind of anomaly situation that causes performance to drop significantly while also not being easily resolved once triggered; I'm not sure yet how warm/cold boot may be involved in said recovery or not but it's not as simple as just adding the pull-up code line back and all will be immediately back to normal after reboot. Unfortunately I have a tollgate coming up in a few days which means I don't want to mess too much with my development rig at the moment, so any further tracing will have to wait, but I figured I should post this here in the meanwhile.
Thoughts?
BR//Karl @xoblite
Statistics: Posted by xoblite — Sun Sep 08, 2024 6:56 pm