Search found 633 matches

by ccs_hello
Sat Nov 28, 2020 8:20 pm
Forum: General Discussion
Topic: Lattepanda 2x usb-c
Replies: 5
Views: 143

Re: Lattepanda 2x usb-c

@ OP
If you place your question in LP Alpha/Delta related subforum, you may get more appropriate responses.

I have been using the original 45W USB-C PD power adpter to
supply power to both the LP Alpha (or Delta) and a
10.1" (or 13") eDP monitor thru the 30-pin flex cable wthout problems.
by ccs_hello
Thu Nov 26, 2020 4:17 pm
Forum: Technical Discussion
Topic: how to use WS2812 LED strip
Replies: 2
Views: 43

Re: how to use WS2812 LED strip

Each RGB LED draws approximately 50 mA when it is set to full brightness and powered at 5 V. A 30-LED strip can draw up to 5V 1.5A. If you must use OEM USB-C PD based power supply, there is no easy way to get 5V 1.5A out other than combining several USB port's DC output (using 0.5A per port formula....
by ccs_hello
Tue Nov 24, 2020 5:52 pm
Forum: Troubleshooting
Topic: Usb Port doesn’t work
Replies: 22
Views: 2326

Re: Usb Port doesn’t work

It is a high-side MOSFET switch (I am guessing) to turn ON/OFF the USB port's DC power. BTW, if ONLY that MOSFET is defective and everything else is okay, then the USB port will still work, if the USB peripheral device(s) is connected to a POWERED USB Hub, while that hub's upstream port is connectin...
by ccs_hello
Fri Nov 20, 2020 1:39 am
Forum: Technical Discussion
Topic: M.2 Key application
Replies: 1
Views: 125

Re: M.2 Key application

Usually they do if key type matches. HOWEVER, there are still a few cases that the required signals are not exposed on PC's M.2 (NGFF) socket interface. In another word, not all possiblities/combinations are made available nor it is universally compatible. P.S. we do know details of the M.2 interfac...
by ccs_hello
Tue Nov 17, 2020 10:43 pm
Forum: Technical Discussion
Topic: LattePanda Delta with CANBUS over SPI
Replies: 3
Views: 208

Re: LattePanda Delta with CANBUS over SPI

Here I am guessing you are looking into X86 side of SPI interface, not Arduino side (since you are not satisfied on Rasp Pi's, I doubt you'll be satisfied with Ardu's.) Please note x86 SPI, in general, is very hard to tackle for two reasons: 1. the exposed SPI bus is system-critical (system mgmt bus...
by ccs_hello
Tue Nov 10, 2020 7:57 pm
Forum: Troubleshooting
Topic: USB Port Identification - 864s
Replies: 2
Views: 221

Re: USB Port Identification - 864s

Plugging in a USB-C based device such as a flash drive...
If using Windows, use the application USBview to find that flash drive to get port assignment info.
If using Linux, use lsusb -vv
by ccs_hello
Mon Nov 09, 2020 4:14 pm
Forum: Troubleshooting
Topic: Lattepanda won't start correctly (EPI shell)
Replies: 6
Views: 474

Re: Lattepanda won't start correctly (EPI shell)

Your LP is a version 1 (classic) LattePanda.
Please use the proper subforum to ask your questions. Thanks!
by ccs_hello
Sun Nov 08, 2020 6:15 pm
Forum: Technical Discussion
Topic: Lattepanda Delta Port abnormal.
Replies: 1
Views: 196

Re: Lattepanda Delta Port abnormal.

No clue. The Firmata master is on the PC side (LP Delta) as your C# program, while the Leonardo (LP Alpha/Delta's ATmega32u4 is running firmata core/library to listem to its master.) If some of the firmata port control functions work while oher IO ports won't work, I tend to think the issue is Firma...
by ccs_hello
Sun Nov 01, 2020 1:36 am
Forum: Technical Discussion
Replies: 1
Views: 206


What I can tell you is what I had tried and prior knowledge (learned and/or by observed behavior): 1. A PC (like LP Alpha/Delta) cannot tolerate temporary loss of power or voltage drops to low (brown out), even for a short period as short as tens of milliseconds. 2. USB-C PD negotiation takes time, ...