Cost might be an issue. When the entire computer costs $35, adding $30 to the total is quite a bit. But I'm also thinking in terms of volume and space. With Ethernet I'd need a switch and that increases the volume by maybe 30% I am thinking about Machine Kit as a motion controller, for something much smaller then a Bridgeport mill where the entire device, controller and servo motors are powered by a battery. Mesa is almost cost effective if using the $60 board.
Who was it that said he wanted a separate Ethernet port for the Mesa card and one for the general purpose LAN? If that really is needed then use a USB <=> Ethernet dongle to gain a second Ethernet port. With the Raspberry Pi 3. People are getting actually BETTER performance from the USB Dongle then the built-in Ethernet port because the built-in port is 100BaseT and you can get Gigabit dongles that in real-life on the Pi can push 200 mbps. But the Pi 3 as WiFi. So if you use that for the general purpose networking (web surfing, file transfer, ...) then you can use the built-in Ethernet for the Mesa card and not need the USB dongle. On Sun, Oct 23, 2016 at 10:28 PM, Danny Miller <dan...@austin.rr.com> wrote: > I don't know why you'd want to use that when the 7i92 is available. > You're using a parallel port or serial, which has significant bandwidth > and latency issues compared to ethernet. 7i92's only $30 more so I doubt > cost is a big factor here. > > > But, pretty sure it'll work with LinuxCNC. For 7i92, you loadrt > HOSTMOT2 which creates HAL pins for all the functions. You do need to > use a command-line tool "mesaflash" once to load the hardware bitfile > image into the FPGA. There are several bitfiles available, they > dedicate specific pins to be stepgens, encoders, etc. You can turn off > specific functions and turn them into GPIO, but you can't take GPIO and > assign a new stepgen to it, because that involves new FPGA code. > > Danny > > > On 10/24/2016 12:18 AM, Chris Albertson wrote: >> Does the 7I90HD work with Linux CNC? It looks like it could work >> It looks like it would be the board to use with an ARM Pi3. It >> connects with the host using SPI which is easy to use in the Pi3 >> 7I90HD is the lowest cost Mega FPGA board at only $59 so you could >> have the computer and Mesa card both for under $100 and the set of >> cards would fit in the palm of your hand. >> >> There is an Ethernet version of the FPGA card too but it is much more >> expensive and SPI might be even faster as there is far less overhead. >> SPI can't go very far, just a few inches but >> >> What about labor problems as the ports? Spomthing like this would >> come in air freight. Almost all electronics >> >> >> >> On Sun, Oct 23, 2016 at 8:37 PM, Danny Miller <dan...@austin.rr.com> wrote: >>> >>> On 10/23/2016 4:28 PM, Gene Heskett wrote: >>>>> No biggie, on my CNC (not an SBC) I just added a wifi USB already. >>>>> >>>>> Mesa 7i92 are totally available from the mfg: >>>>> >>>>> http://store.mesanet.com/index.php?route=product/product&product_id=30 >>>>> 2 >>>> Not according to that web page 2 hours ago. Out of stock. But this link >>>> say 170 on the shelf? Left hand, please call right hand. :) Either that >>>> or the boat finally docked, I understand they've got labor problems at >>>> some west side ports. > > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, SlashDot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users -- Chris Albertson Redondo Beach, California ------------------------------------------------------------------------------ The Command Line: Reinvented for Modern Developers Did the resurgence of CLI tooling catch you by surprise? Reconnect with the command line and become more productive. Learn the new .NET and ASP.NET CLI. Get your free copy! http://sdm.link/telerik _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
