<Padmakar>
kernel version 4.19.94 ti-r64 is supporting only spi but not pwm at same time on beaglebone blue. so please can you give solution for this problem.
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<zmatt>
describe what made you come to that conclusion
<zmatt>
since it sounds nonsensical
<zmatt>
spi and pwm have nothing to do with each other, and I'm pretty sure both work fine on that kernel
<zmatt>
ehrpwm0 (outputs A and B) can be muxed to the SPI connectors or to the GPS connector on the bbblue
<zmatt>
(ehrpwm1 and ehrpwm2 are used by the motor outputs)
<zmatt>
UT0 pins 3 and 4 can also be used as PWM outputs
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<zmatt>
as can pin 6 of the GP0 connector
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<Padmakar>
okay thanks @zmatt i will check it.
<zmatt>
the right argument to give to config-pin is unfortunately often confusing on the bbblue
<zmatt>
since the pins are often named after the corresponding BBB pin rather than something that makes sense on the blue
<zmatt>
jduchniewicz: not sure why those slides are making such a hassle of measurement... just use "systemd-analyze plot >boot.svg" to get a nice svg plot of what's going on during boot
<jduchniewicz>
ah yes, this method you showed me before is awesome :)
<jduchniewicz>
totally blew my mind
<Guest25>
loopback test through SPI in kernel 4.19.94 ti-r64 is working but loopback of PWM is not working
<zmatt>
here are some things that have large impact:
<zmatt>
Guest25: what do you mean by 'loopback of pwm" ?
<zmatt>
jduchniewicz: if you don't need the usb gadget (usb networking/serial) then "sudo systemctl disable generic-board-startup" will cut a decent chunk from boot time
<Guest25>
sorry for the wrong input. i am asking only about loopback of spi
<zmatt>
jduchniewicz: removing initramfs helps too
<Guest25>
in kernel 4.19.94 ti-r49 the spi loopback is not working but the driver is initialized whereas in kernel 4.19.94 ti-r62 the loopback of spi is working
<zmatt>
so use r62? you're really not giving enough useful information for anyone to be able to help you
<zmatt>
I'm pretty sure SPI has worked fine in every kernel since ancient history, but I can't magically guess what you might be doing wrong
<zmatt>
I need to go anyway
<zmatt>
afk
<Guest25>
Hi, this is our observation by shorting MISO and MOSI in different kerenels. kernel 4.19.94 ti-r42 support PWM but not SPI
<Guest25>
kernel 4.19.94 ti-r64 support SPI but not PWM
<Guest25>
in Kernel 4.19.95 ti-r42 SPI is not working whereas kernel 4.19.94 ti-r64 spi is working.
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<set_>
Well! I got these fancy USB-software motor drivers that can take 3.3v input/output. Nice?
<set_>
I think so. Anyway...sorry for sharing.
<set_>
I know, I know. "Stop set_ from sharing."
<GenTooMan>
USB software motor drivers? (confused look of the day)
<set_>
Ha. GenTooMan.
<set_>
Yes.
<set_>
They have a Mini USB connector for simple config.
<set_>
These are my first and best taken care of motor drivers.
<set_>
I have literally never used them correctly, hahaha, @zmatt.
<set_>
I just figured out how.
<GenTooMan>
well good, I guess?
<set_>
Yes.
<set_>
good, very good.
<set_>
I feel like breaking into song.
<set_>
Man, I was hoping that the BeagleV was a way to play .c files audio w/ the Beagle family of boards.
<set_>
I was going to try to promote, install, and compile it on the V. Yes, I called it the V.
<set_>
But...not now. There is so much you guys and gals are doing. I cannot wait to try to keep up again.
<set_>
I went to the forum, there was a GSOC fellow discussing PRU, another about compiling the Bela IDE on the AI, and other stuff too.
<set_>
One about config-pin but in uboot.
<set_>
...I type too much.
<set_>
SOryr.
<set_>
The motor drivers have a config. utility from 2012 but it still works for some reason.
<set_>
There is RC, TTL Serial, and something I have been meaing to research, i.e. BEC. Hmm.
<set_>
Battery Eliminator Circuit. Something about some batteries and RC stuff.
<set_>
voltage regulators == BEC
<set_>
So, I have a step down supply w/ capacitors for storage.
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<set_>
So, I have a 12vdc battery and I subtract 3.3v from the 12v which gives me 8.7v. Then, 5A * 8.7v = 43.5w. W/ that LDO onboard the driver, I can achieve 90%, give or take, of the 43.5w or 39.15w of power consumption w/ the voltage reg/BEC.
<set_>
...
<set_>
Nice! That way, the bot, if I am still in control of it, can safely return in one piece.
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<set_>
Hello...is beaglebone.local not having wifi issues or is it just me?