gaston1980 has quit [Quit: Konversation terminated!]
<willmore>
ullbeking, I have two of them and it's an H3 board?
perr_ has joined #linux-sunxi
perr__ has joined #linux-sunxi
ChriChri_ has joined #linux-sunxi
perr_ has quit [Ping timeout: 240 seconds]
ChriChri has quit [Ping timeout: 240 seconds]
ChriChri_ is now known as ChriChri
perr__ has quit [Ping timeout: 240 seconds]
<ullbeking>
aalm: this is a fantastic suggestion!! I love it. and yes, I love writing C code but I'm new to Microcontrollers. however I have recently recently received a couple of stm32f4XXX small blue breakout boards from aliexpress, so it looks like I probably already have most of the hardware I need..?
<megi>
ullbeking: one of my pet peeves with uart is that idle tx state is "high", and that can cause some leakage into the IO pin on the side that's turned off, so I like to stuff TXS0108E between the uart chip and the device, which has a nice property that it prevents leakage either way
<megi>
if I put turned off dongle into powered board on some dongles the TX led will turn on :)
<megi>
and the other way, it can cause issues for the SoC on the board during poweron
<ullbeking>
megi: I have seen small boards with these interfaces that isolate the power by using separate regions for the literal interface connection and then optical communications for the signaling
<megi>
yeah, that's probably a bit over the top though
<megi>
there's no need for galvanic isolation in most cases
<ullbeking>
but I think that it is plausible/feasible that this phenomenon that you identified could be partly responsible for the sometimes difficulty in flashing BIOS chips etc..?
<megi>
I have no experience with that
<ullbeking>
megi: well... what can one do? you proposed a problem, I suggested an existing solution, and that's not good enough somehow?
<megi>
I also suggested a solution :)
<megi>
TXS0108E
<ullbeking>
ah yeah, I am looking at the TXS0108E now. I saw the optical communication thing last night and it wasn't much more expensive than the regular version. I haven't heard of the TXS0108E before.
<megi>
it's a level shifter with two voltage domains that can be turned on/off in any order
<megi>
one trouble is that you need to have access to UART-VCC on the board, and some boards don't expose that, so optical solution might work better with those boards
<ullbeking>
megi: by "device" above, what do you mean? I am not quite sure exactly where you re putting the voltage level shifter
<megi>
though you'll still need power for the rx led on the board side
<megi>
rx fototransistor, eh
<megi>
device = device you connect the UART dongle to
<ullbeking>
"between the uart chip and the device" so how do you get the TXS0108E in here? do you mean the UART on the device?
<ullbeking>
I'm confused
<megi>
Opi boards have it nice, since they have level shifter integrated, and don't need UART-VCC
<megi>
dongle rx/tx <-> txs <-> device
cnxsoft has joined #linux-sunxi
<ullbeking>
I know that in theory but I am having difficulty understanding how to actually implement that
<ullbeking>
wait...
<megi>
there's a higher and lower voltage side on TXS0108E, I usually use 5V uart and connect it to the higher voltage side, and connect the device to the lower voltage side (GND,TX,RX,VCC)
<ullbeking>
megi: which side do you connect the 1.8 v side to?
<ullbeking>
on the left is the UART, on the right is the dongle?
<megi>
B port is higher voltage
<ullbeking>
here is the information I needed:
<megi>
A port is 1.2-3.6V
<ullbeking>
"The VCCA pin accepts any supply voltage between 1.2 V and 3.6 V. The B port tracks the VCCB pin supply voltage. The VCCB pin accepts any supply voltage between 1.65 V and 5.5 V. Two input supply pins allows for low Voltage bidirectional translation between any of the 1.2 V, 1.8 V, 2.5 V, 3.3 V, and 5 V voltage nodes."
<ullbeking>
that got me deconfused :-)
<megi>
:)
<ullbeking>
thank you megi
<ullbeking>
this is really cool
<ullbeking>
it's great to find alternative ways to solve an issue
<megi>
also VccB must be higher than VccA
<aalm>
oh, so that would be usable for 1.8V uart
<ullbeking>
aalm: yes
<megi>
yup
<megi>
I use it for weird 2.8V uarts, etc
<ullbeking>
aalm: that's the bit that tripped me up
<ullbeking>
aalm: megi: I'm going to add these to my "serial communications compendium", which is a comprehensive description of a "kit" that allows accurate serial comms. it's becoming a very important signalling protocol for communicating with computing devices.
<megi>
nice, that was my motivation to speak up :)
<ullbeking>
megi: fame and riches will soon be yours :D
<megi>
I'd take the riches :)
<megi>
So far I only have a limited fame, two years ago I went to a dancing class, and one guy there recognized me by name and asked me if I'm that orange pi guy, haha
<ullbeking>
megi: NO WAY, LOLOLOL :D
<megi>
but then, dancing classes are a magnet for sitting people, like those that work with computers
<ullbeking>
you are the famous orange pi guy!! that is so cool.
<ullbeking>
indeed
<ullbeking>
I was just tango classes with a guy at work the other day
megi has quit [Ping timeout: 240 seconds]
lkcl has quit [Ping timeout: 245 seconds]
dddddd has quit [Remote host closed the connection]
cnxsoft1 has joined #linux-sunxi
cnxsoft has quit [Read error: Connection reset by peer]
kaspter has joined #linux-sunxi
camus has joined #linux-sunxi
kaspter has quit [Ping timeout: 276 seconds]
camus is now known as kaspter
TheSeven has quit [Disconnected by services]
[7] has joined #linux-sunxi
random_yanek has quit [Ping timeout: 265 seconds]
random_yanek has joined #linux-sunxi
lurchi__ is now known as lurchi_
aloo_shu has quit [Ping timeout: 265 seconds]
aloo_shu has joined #linux-sunxi
_whitelogger has joined #linux-sunxi
lurchi_ is now known as lurchi__
vagrantc has joined #linux-sunxi
lurchi_ has joined #linux-sunxi
lurchi__ has quit [Ping timeout: 240 seconds]
reinforce has joined #linux-sunxi
selfbg has joined #linux-sunxi
netlynx has joined #linux-sunxi
netlynx has joined #linux-sunxi
netlynx has quit [Changing host]
florian_kc has joined #linux-sunxi
florian_kc has quit [Ping timeout: 240 seconds]
perr__ has joined #linux-sunxi
perr__ has quit [Excess Flood]
perr__ has joined #linux-sunxi
florian_kc has joined #linux-sunxi
florian_kc has quit [Ping timeout: 276 seconds]
ldevulder_ is now known as ldevulder
perr__ has quit [Ping timeout: 268 seconds]
aloo_shu has quit [Quit: oink]
tllim has quit [Read error: Connection reset by peer]
vagrantc has quit [Quit: leaving]
diego_r has joined #linux-sunxi
yann has quit [Ping timeout: 276 seconds]
tnovotny has joined #linux-sunxi
xyyangkun has joined #linux-sunxi
xyyangkun has quit [Remote host closed the connection]
<diego_r>
karlp: (cc: wens) here you go: https://pastebin.com/XibDe2U6 gpios should be ok, not so sure about clocks and regulators. Any help appreciated.
parazyd has quit [Quit: leaving]
<karlp>
(you're gonna want to change that for the h5 version too right? they're identical otherwise?)
<diego_r>
karlp: sure, but I've got to make the change work first...
<diego_r>
karlp: aah, thanks, very helpful. Does the rest look good?
<karlp>
I didn't check the pins against the schematic, but yeah, once I got the clock on the pwr seq node, and actually had my buildroot _actually_ rebuild the kernel when I had made changes, it was very muhc "copy what the others have done before"
<karlp>
you need to at least get to the "couldn't find firmware brcm/blah.hcd" then you nkow it's all "working" as far as the dts is concerned.
<diego_r>
karlp: thanks. I'll get back to that when I can
kaspter has quit [Ping timeout: 268 seconds]
kaspter has joined #linux-sunxi
diego_r has quit [Remote host closed the connection]
diego_r has joined #linux-sunxi
matthias_bgg has joined #linux-sunxi
dddddd has joined #linux-sunxi
AneoX has joined #linux-sunxi
<clementp[m]>
Hi, I saw that there is a new H6 called H6 CV200 OS which is an H6 without EMAC, PCIe and CSI. Maybe it will be something like H6T / sun50iw6p2 ?? Does someone has more info on it ?
<willmore>
I'm okay with it missing (broken) PCIe and (never used by me) CSI, but EMAC? I guess it needs an external GMAC then?
msev- has quit [Quit: Leaving]
perr__ has joined #linux-sunxi
perr_ has joined #linux-sunxi
perr__ has quit [Ping timeout: 250 seconds]
<MoeIcenowy>
maybe it's just spec deletion again
<MoeIcenowy>
like what happens on H2+
* willmore
is okay with that.
Mangy_Dog has joined #linux-sunxi
perr_ has quit [Ping timeout: 276 seconds]
fl__0 has joined #linux-sunxi
fl_0 has quit [Ping timeout: 240 seconds]
jbrown has quit [Quit: Leaving]
fl__0 is now known as fl_0
<mru>
or they're trying to sell as many slightly flawed chips as possible
perr_ has joined #linux-sunxi
chewitt has joined #linux-sunxi
fl__0 has joined #linux-sunxi
fl_0 has quit [Ping timeout: 276 seconds]
jonasbits has quit [Quit: No Ping reply in 210 seconds.]
ldevulder_ has joined #linux-sunxi
ldevulder has quit [Ping timeout: 240 seconds]
perr has joined #linux-sunxi
perr_ has quit [Ping timeout: 240 seconds]
TEKrantz has quit [Read error: No route to host]
jbrown has joined #linux-sunxi
perr has quit [Ping timeout: 265 seconds]
selfbg has quit [Remote host closed the connection]
selfbg has joined #linux-sunxi
popolon has joined #linux-sunxi
TEKrantz has joined #linux-sunxi
TEKrantz has quit [Read error: No route to host]
perr has joined #linux-sunxi
camus has joined #linux-sunxi
kaspter has quit [Ping timeout: 276 seconds]
yann has quit [Ping timeout: 250 seconds]
TEKrantz has joined #linux-sunxi
camus is now known as kaspter
yann has joined #linux-sunxi
camus has joined #linux-sunxi
kaspter has quit [Ping timeout: 276 seconds]
camus is now known as kaspter
perr has quit [Ping timeout: 276 seconds]
sunshavi has quit [Remote host closed the connection]
tnovotny has quit [Quit: Leaving]
yann has quit [Read error: Connection timed out]
yann has joined #linux-sunxi
megi has quit [Ping timeout: 265 seconds]
TEKrantz has quit [Ping timeout: 268 seconds]
jbrown has quit [Quit: Leaving]
JohnDoe_71Rus has joined #linux-sunxi
sunshavi has joined #linux-sunxi
TEKrantz has joined #linux-sunxi
lurchi_ is now known as lurchi__
sunshavi has quit [Remote host closed the connection]
reinforce has quit [Quit: Leaving.]
yann has quit [Ping timeout: 240 seconds]
selfbg has quit [Remote host closed the connection]
yann has joined #linux-sunxi
gsz has joined #linux-sunxi
megi has joined #linux-sunxi
sunshavi has joined #linux-sunxi
gaston1980 has quit [Quit: Konversation terminated!]
sunshavi has quit [Remote host closed the connection]
sunshavi has joined #linux-sunxi
sunshavi has quit [Remote host closed the connection]
sunshavi has joined #linux-sunxi
jonasbits has joined #linux-sunxi
ganbold has quit [Remote host closed the connection]
ldevulder__ has joined #linux-sunxi
aalm has quit [Quit: xyz 2.3]
ldevulder_ has quit [Ping timeout: 268 seconds]
ldevulder__ is now known as ldevulder
matthias_bgg has quit [Quit: Leaving]
Putti has joined #linux-sunxi
aloo_shu has joined #linux-sunxi
Putti has quit [Changing host]
Putti has joined #linux-sunxi
diego_r has quit [Ping timeout: 240 seconds]
camus has joined #linux-sunxi
kaspter has quit [Ping timeout: 276 seconds]
camus is now known as kaspter
ganbold has joined #linux-sunxi
camus has joined #linux-sunxi
kaspter has quit [Ping timeout: 268 seconds]
camus is now known as kaspter
florian has quit [Quit: Leaving]
vagrantc has joined #linux-sunxi
jbrown has joined #linux-sunxi
matthias_bgg has joined #linux-sunxi
yann has quit [Ping timeout: 276 seconds]
reinforce has joined #linux-sunxi
kaspter has quit [Ping timeout: 276 seconds]
camus has joined #linux-sunxi
camus is now known as kaspter
florian_kc has joined #linux-sunxi
florian_kc has quit [Ping timeout: 276 seconds]
diego_r has joined #linux-sunxi
yann has joined #linux-sunxi
aalm has joined #linux-sunxi
sunilmohan has quit [Ping timeout: 240 seconds]
wasutton3 has quit [Ping timeout: 268 seconds]
sunilmohan has joined #linux-sunxi
sunilmohan has quit [Changing host]
sunilmohan has joined #linux-sunxi
florian_kc has joined #linux-sunxi
florian_kc is now known as florian
wasutton3 has joined #linux-sunxi
marvs has joined #linux-sunxi
diego_r has quit [Remote host closed the connection]
aloo_shu has quit [Remote host closed the connection]