#avr Logs

Oct 09 2019

12:00 AM rue_bed: yea I always have atleast one NOP
12:05 AM day__ is now known as day
03:58 AM LeoNerd: cehteh: What's only up to 16MHz?
06:10 AM cehteh: LeoNerd: 328pb with low power crystal
06:11 AM LeoNerd: Hmmm
06:12 AM cehteh: 20mht only with external clock signal
06:13 AM LeoNerd: Ahhh
06:45 AM twnqx: cehteh: finally stopped guessing and read both LUFA code and USB spec. works immediately if you know what you're doing...
06:45 AM twnqx: also, pull resistances on I2c were too high to overcome something inside the monitor i attached to as I2C example (DDC bus).
06:46 AM twnqx: pull-up*
06:48 AM twnqx: also, for future reference: the "timeout" for the reply is 500ms, so the initial I2C addressing fits comfortably. the µs protocol handling is apparently done in hardware here.
07:04 AM cehteh: lol ... yes
07:06 AM Fuchikoma: So it's working, then?
07:11 AM cehteh: was my thinking .. your error, well i expected you did rtfm
07:14 AM twnqx: Fuchikoma: what is implemented so far works, now just moving stuff out of the interrupt handler and inside the mainloop
07:14 AM twnqx: and implementing what is missing
07:20 AM Fuchikoma: yay
07:26 AM twnqx: well, i successfully broke it.
07:34 AM * twnqx headdesks and adds -Wshadow to the Makefile
08:59 AM Fuchikoma_ is now known as Fuchikoma
09:04 AM dan3wik is now known as dan2wik
01:45 PM julius: hi
01:46 PM julius: the guy on this page: https://www.pocketmagic.net/avr-sdcard-fat-support-with-fatfs/ says to connect VCC to 3.3v on the sdcard holder. why? he also says that a LM1117 is on the sdcard holder which converts 5v to 3.3v. so why make the 3.3v available on the pin holder anyway if its used for the sdcard?
01:55 PM cehteh: looks odd, esp you dont want to connect it to some other 3v3 source when you run the µC at 5V (you'll end up fighting 2 vreg against each other)
01:56 PM cehteh: *but* in case you have a pure 3v3 system you can/must supply only 3v3 v over the header
01:56 PM cehteh: circumventing the vreg
02:03 PM julius: im currently on 5v
02:04 PM julius: lets measure if the 3.3v pin maybe juts makes 3.3v available and we dont need it
02:04 PM cehteh: then keep the 3v3 independent,
02:04 PM julius: independent = not connect?
02:04 PM cehteh: your µC may provide 3v3 (because of USB on that side)
02:05 PM cehteh: you should not connect these 2 independently reculated 3v3 rails together
02:05 PM cehteh: so dont connect, dont jumper, dont have .. whatever is necessary to prevent that
02:07 PM julius: ok, i got it :)
02:24 PM julius: jesus the ff.c file is 234kb in site....lets see how small that gets when compiled
02:32 PM cehteh: told ya