Success at last! To summarize everything I've learned: - I was missing one ground (RPi pin 14) - mesaflash doesn't tell me that I have to use --device 7i90, not 7i90hd. I had to look at the mesaflash source to figure that out. - my Fluke 179 dvm diode check does not give me ~0.7v readings for fpga pins - I have to load the spi bit file with jtag
I now have native RPi jtag using openocd working, so don't need the $50 Digilent HS2 dongle any more. I edited the raspberrypi-native.cfg file to move the gpio pins from 11,25,10,9 to 17,27,22,5 to avoid conflict with the 7i90's SPI pins. I will spin another version of my little adapter shim pcb to include the jtag header. I'll be happy to share that design with the group when I get them back and tested. Thank you again! -- Ralph > Is there anything that needs to be done > differently on the RPi 3b+ to communicate > with the 7i90 via spi versus the 7c81? It should be identical, and AFAIK the mesaflash interface should be less picky since it runs at a lower clock speed than the default hm2-rpspi driver Are all RPI grounds connected to all 7I90 26 pin header grounds? > > Is the next step to cobble up some vhdl to > verify all the pins on the spi interface side > are functioning? I suppose somewhere along > the line I might have blown a pin. If you blow a pin, it will usually show as the protection diode being damaged. You can check this with a DVMs diode check function. Connect the DVMs positive lead to 7I90 ground and check the diode voltage drop on the SPI leads, they should all be ~.7V > > I'd really like to get this working, as I'm putting > together a standard package I can use for all > our custom controllers for machines and instruments. > Bioprinters, syringe pumps, bioreactors, routers, > pick & place, hotwire foam cutters. I'm tired of > random castoff pc's. > > Thanks again, > -- Ralph > ________________________________________ > From: Peter C. Wallace [p...@mesanet.com] > Sent: Monday, January 11, 2021 4:34 PM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] Rpi 3b+ to 7i90hd > > CAUTION: This email originated from outside the Walla Walla University email > system. > > > On Mon, 11 Jan 2021, Ralph Stirling wrote: > >> Date: Mon, 11 Jan 2021 23:48:56 +0000 >> From: Ralph Stirling <ralph.stirl...@wallawalla.edu> >> Reply-To: "Enhanced Machine Controller (EMC)" >> <emc-users@lists.sourceforge.net> >> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> >> Subject: Re: [Emc-users] Rpi 3b+ to 7i90hd >> >> I've made a bit of progress now. I found a Digilent HS2 >> jtag dongle, and got to the point of (apparently) successfully >> loading an SPI bitstream to the 7I90 (chose 7i90_spi_svst4_8.bit). >> >> Running: >> >> $ mesaflash --device 7i90hd --addr /dev/spidev0.0 --spi --readhmid >> >> gives me the same "no 7I90HD board found" error though. I tried >> adding a pullup resistor to the SDO pin, without change, which >> would seem to indicate the 7I90HD is actively driving it low. >> >> Is there a very simple blinky bitstream I can try loading to >> be sure the jtag loading is successful? The /INIT yellow led >> flashes briefly, and /DONE red led does go on during the load >> and goes off afterward. >> >> Thanks again. >> -- Ralph > > > Theres no blinky light test bitfile but if you load the sserial > remote bitfile 7i90_ssremote.bit, The init LED should light once > configured (well 50 ms after configured indicating a watchdog timeout) > >> ________________________________________ >> From: Peter C. Wallace [p...@mesanet.com] >> Sent: Friday, January 8, 2021 1:22 PM >> To: Enhanced Machine Controller (EMC) >> Subject: Re: [Emc-users] Rpi 3b+ to 7i90hd >> >> CAUTION: This email originated from outside the Walla Walla University email >> system. >> >> >> On Fri, 8 Jan 2021, Ralph Stirling wrote: >> >>> Date: Fri, 8 Jan 2021 21:08:55 +0000 >>> From: Ralph Stirling <ralph.stirl...@wallawalla.edu> >>> Reply-To: "Enhanced Machine Controller (EMC)" >>> <emc-users@lists.sourceforge.net> >>> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> >>> Subject: Re: [Emc-users] Rpi 3b+ to 7i90hd >>> >>> Not having Xilinx Impact tool on the Rpi (or anywhere >>> at the moment), I found a tutorial on setting up >>> OpenOCD for jtag on the Rpi. I have installed OpenOCD >>> on my RPi 3B+ and connected the gpio to the JTAG pins >>> on the 7i90HD, following this tutorial: >>> >>> https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fmovr0.com%2F2016%2F09%2F02%2Fuse-raspberry-pi-23-as-a-jtagswd-adapter%2F&data=04%7C01%7Cralph.stirling%40wallawalla.edu%7C4feb8a1bac6e4697cd8308d8b69a8eef%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637460122239287153%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=iap%2BTsn6u%2F0IHsUt9EIMTWXTY7lyroW19dK7Ds0H8s0%3D&reserved=0 >>> >>> The last step seems to be to make a configuration >>> file for the target device. The EEPROMs are WInbond >>> 25Q16JVNIQ as best I can read the chip labels. OpenOCD >>> doesn't have anything that looks directly applicable. >>> I also don't know where the two chips are in the jtag >>> chain. >> >> You dont need to do this if you can program the FPGA >> (and JTAG programming large EEPROMS is glacially slow) >> >> If you can program the FPGA via JTAG, you program the FPGA with a SPI >> configuration, and then run mesaflash from the RPI to write the >> flash memory >> >> >>> >>> Am I heading down a rat hole, or getting close to success? >>> >>> Thanks again. >>> -- Ralph >>> ________________________________________ >>> From: Peter C. Wallace [p...@mesanet.com] >>> Sent: Thursday, January 7, 2021 3:47 PM >>> To: Enhanced Machine Controller (EMC) >>> Subject: Re: [Emc-users] Rpi 3b+ to 7i90hd >>> >>> CAUTION: This email originated from outside the Walla Walla University >>> email system. >>> >>> >>> On Thu, 7 Jan 2021, Ralph Stirling wrote: >>> >>>> Date: Thu, 7 Jan 2021 23:37:03 +0000 >>>> From: Ralph Stirling <ralph.stirl...@wallawalla.edu> >>>> Reply-To: "Enhanced Machine Controller (EMC)" >>>> <emc-users@lists.sourceforge.net> >>>> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> >>>> Subject: Re: [Emc-users] Rpi 3b+ to 7i90hd >>>> >>>> I assumed that the 7i90hd would recognize SPI >>>> directly, like the 7c81 does. Do I have to go >>>> dig up a parallel port computer from somewhere >>>> and get at least mesaflash running on it just >>>> so I can get spi working for the pi? That is an >>>> unfortunate hurdle. I don't see anything in the >>>> manual about needing to load the correct bitstream >>>> over parallel in order to use spi. In fact, I read >>>> this in the manual: >>> >>> Yep, you need to have SPI firmware loaded in the 7I90HD >>> default 7I90HD firmware is EPP, so a device with a EPP >>> interface is needed to load the SPI configuration >>> I would suggest loading the SPI interface into the >>> secondary flash leaving the primary as EPP for a fallback >>> >>> That is, power the 7I90 with the flash jumper in the "P" position >>> them move the jumper to "S" before loadin the SPI firmware >>> >>> >>>> >>>> "Linux and Windows utility programs mesaflash and mesaflash.exe are >>>> provided to >>>> write configuration files to the 7I90HD EEPROM via the RS-422 interface >>>> and LBP16. The >>>> linux utility can also write configuration files via the EPP interface. >>>> These files depend on >>>> a simple SPI interface built into both the standard user FPGA bitfiles and >>>> the fallback >>>> bitfile." >>> >>> >>> Well there are 2 SPI interfaces, the HM2 compatible host interface (which >>> needs >>> specific SPI firmware) and the SPI Flash memory interface (which is in HM2 >>> memory space and allows access to the SPI flash chip) >>> >>>> >>>> I can tack on a pullup to SDO. I have put four >>>> scope probes on the four signals, and see data >>>> when interrogating the 7c81, but not the 7i90hd. >>>> The clock from the pi is correct. >>>> >>>> Thanks again. >>>> -- Ralph >>>> ________________________________________ >>>> From: Peter C. Wallace [p...@mesanet.com] >>>> Sent: Thursday, January 7, 2021 3:18 PM >>>> To: Enhanced Machine Controller (EMC) >>>> Subject: Re: [Emc-users] Rpi 3b+ to 7i90hd >>>> >>>> >>>> Looks right >>>> >>>> 2 layer should be fine as long as the ground is solid (wide) >>>> between the 7I90 and the RPI (and lo longer than a couple of >>>> inches >>>> >>>> You might try adding a pullup to SDO (7I90 15) to see if you read >>>> 0xFFFFFFFF which would indicate the the 7I90 is not driving SDO >>>> >>>> Sure you have a SPI config in the 7I90? >>>> >>>> >>>> Peter Wallace >>>> Mesa Electronics >>>> >>>> (\__/) >>>> (='.'=) This is Bunny. Copy and paste bunny into your >>>> (")_(") signature to help him gain world domination. >>>> >>>> >>>> >>>> _______________________________________________ >>>> Emc-users mailing list >>>> Emc-users@lists.sourceforge.net >>>> https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=04%7C01%7Cralph.stirling%40wallawalla.edu%7C4feb8a1bac6e4697cd8308d8b69a8eef%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637460122239287153%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=zRGQQnf%2B%2FtAOB1OAYntbNrnNqt7bzClJfye8QyXWLH0%3D&reserved=0 >>>> >>>> >>>> _______________________________________________ >>>> Emc-users mailing list >>>> Emc-users@lists.sourceforge.net >>>> https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=04%7C01%7Cralph.stirling%40wallawalla.edu%7C4feb8a1bac6e4697cd8308d8b69a8eef%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637460122239287153%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=zRGQQnf%2B%2FtAOB1OAYntbNrnNqt7bzClJfye8QyXWLH0%3D&reserved=0 >>>> >>> >>> Peter Wallace >>> Mesa Electronics >>> >>> (\__/) >>> (='.'=) This is Bunny. Copy and paste bunny into your >>> (")_(") signature to help him gain world domination. >>> >>> >>> >>> _______________________________________________ >>> Emc-users mailing list >>> Emc-users@lists.sourceforge.net >>> https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=04%7C01%7Cralph.stirling%40wallawalla.edu%7C4feb8a1bac6e4697cd8308d8b69a8eef%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637460122239287153%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=zRGQQnf%2B%2FtAOB1OAYntbNrnNqt7bzClJfye8QyXWLH0%3D&reserved=0 >>> >>> >>> _______________________________________________ >>> Emc-users mailing list >>> Emc-users@lists.sourceforge.net >>> https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=04%7C01%7Cralph.stirling%40wallawalla.edu%7C4feb8a1bac6e4697cd8308d8b69a8eef%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637460122239287153%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=zRGQQnf%2B%2FtAOB1OAYntbNrnNqt7bzClJfye8QyXWLH0%3D&reserved=0 >>> >> >> Peter Wallace >> Mesa Electronics >> >> (\__/) >> (='.'=) This is Bunny. Copy and paste bunny into your >> (")_(") signature to help him gain world domination. >> >> >> >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=04%7C01%7Cralph.stirling%40wallawalla.edu%7C4feb8a1bac6e4697cd8308d8b69a8eef%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637460122239287153%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=zRGQQnf%2B%2FtAOB1OAYntbNrnNqt7bzClJfye8QyXWLH0%3D&reserved=0 >> >> >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=04%7C01%7Cralph.stirling%40wallawalla.edu%7C4feb8a1bac6e4697cd8308d8b69a8eef%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637460122239297146%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=zPBrZ9jq5HefQHGbDDBDHWPnAeOoz5Zqj2wlEtsNEss%3D&reserved=0 >> > > Peter Wallace > Mesa Electronics > > (\__/) > (='.'=) This is Bunny. Copy and paste bunny into your > (")_(") signature to help him gain world domination. > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=04%7C01%7Cralph.stirling%40wallawalla.edu%7C4feb8a1bac6e4697cd8308d8b69a8eef%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637460122239297146%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=zPBrZ9jq5HefQHGbDDBDHWPnAeOoz5Zqj2wlEtsNEss%3D&reserved=0 > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=04%7C01%7Cralph.stirling%40wallawalla.edu%7C4feb8a1bac6e4697cd8308d8b69a8eef%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637460122239297146%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=zPBrZ9jq5HefQHGbDDBDHWPnAeOoz5Zqj2wlEtsNEss%3D&reserved=0 > Peter Wallace Mesa Electronics (\__/) (='.'=) This is Bunny. Copy and paste bunny into your (")_(") signature to help him gain world domination. _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Femc-users&data=04%7C01%7Cralph.stirling%40wallawalla.edu%7C4feb8a1bac6e4697cd8308d8b69a8eef%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637460122239297146%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=zPBrZ9jq5HefQHGbDDBDHWPnAeOoz5Zqj2wlEtsNEss%3D&reserved=0 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
