(2018-10-23, 09:59 PM)abarrow Wrote: Sounds like you have the tools to make it happen! One thing - I was searching Google for information about non-RPI DSI displays connected to the PI. The information on this thread https://www.raspberrypi.org/forums/viewt...p?t=188908 seems to indicate that the DSI interface is closed source and proprietary, which might make it difficult to use. As far as I know, that is what is preventing the implementation of multi-touch displays on the RPI (aside from the 7" display that the Raspberry Pi Foundation sells).
Yes, you are right, it is closed source.
It is very sad to us but the raspberry foundation have NDA´s with Broadcom to not spread this information.
The RPi supports two MIPI data lanes and one clock lane.
This is OK for 800x480 but for higher resolutions more than two are needed.
The Broadcom chipset used can support up to four MIPI data lanes but they are not accessible on the RPi.
On the compute modules all four MIPI data lanes are available! Theoretically. In fact they are not supported
by the kernel software. It took some hours to find out that MIPI cannot be the solution for bigger displays.
Look what nice displays are available that could connected directly but we cannot use them:
https://www.alibaba.com/product-detail/Y...3e43L6NL37
Yes, this is really sad. So we have to deserialise the HDMI output to LVDS parallel signals. This is not a big
deal, there are chips and boards available.
Complete board:
https://de.farnell.com/midas/mcib-14/sch...stViewed_2
Chip from TI:
http://www.ti.com/product/tfp401
The Chip costs less than $10. It comes in a retired qfp 100 footprint that can be soldered by hand easily. I think
a four layer pcb will do it. They are very cheap in china. (pcbway or jlcpcb or...)
My 10" panel is in germany already. It is waiting for customs clearing.
All the best,
Chris
Hi all,
i have no experience with nmea 0183 and nmea 2k hardware.
I am sailing a 20' boat on a lake so there are no instruments
on board.
Can someone provide a schematic, photo or interface description
of nmea 0183 and 2k interfaces?
A photo of an usb enabled interface would be fine. Just to know
what chips are used and what they are doing generally.
I will implement that on the 10" plotter pcb.
Every idea is welcome,
Chris