The multi-device issue could be due to a bad JTAG connection the clock and data might do not have good connections so they read phantom devices - at least that is my previous experience with JTAG. A couple of things to look at:
1) Make sure the connector to the board from the programmer is good. 2) The CPLD prog pin needs a good connection to put the device into programming mode. The CPLD has shared JTAG/User Pins so needs to be in prog mode. 3) Check the connections from the programmer to the board make sure they are solid and not loose. No broken wires etc. Sometimes wires can break just when plugging/unplugging headers etc. 4) The other one is to check there are no shorts on the JTAG pins. On 22/10/17, 2:01 PM, "M100 on behalf of Josh Malone" <m100-boun...@lists.bitchin100.com on behalf of josh.mal...@gmail.com> wrote: >Built my first functional REX on the castellated PCB. Programs and tests >okay. > >But, I've also built me second non-functional REX, too. So far I'm >3-out-of-5 for successful builds. Not sure I'm really up to this. :( > >Maybe I can figure out what's wrong w/ this board. Impact says it >finds lots of unknown devices on the chain and barfs. Reflowed the >CPLD pins but it didn't help. Bugger. > >At least I have one functional REX for my 102, so, yay! > >-Josh > >On Fri, Oct 20, 2017 at 10:05 PM, Brian White <bw.al...@gmail.com> wrote: >> That would be awesome of course! >> >> On Oct 20, 2017 12:35 PM, "Stephen Adolph" <twospru...@gmail.com> wrote: >>> >>> good to hear the castellated board is working. >>> I revised the REX PCB design to (1) remove unneeded parts (2) use >>>ground >>> and power planes and (3) provide a pad to bridge 3.3V onto PORT_EN >>>with a >>> solder bridge. I don't myself plan to test the board but I can post >>>it for >>> others to test. >>> Steve >>> >>> On Fri, Oct 20, 2017 at 12:23 PM, Josh Malone <josh.mal...@gmail.com> >>> wrote: >>>> >>>> My parts should arrive tomorrow. How to take a stab at try two soon. >>>> thanks to everyone for all the help. >>>> >>>> On Oct 20, 2017 11:38 AM, "Brian Brindle" <bbrin...@gmail.com> wrote: >>>>> >>>>> Reflow of the board seemed to fix it. Guess I need to play around >>>>>with >>>>> my methods a little. Working as expected right now. >>>>> >>>>> On Oct 20, 2017 8:31 AM, "Brian White" <bw.al...@gmail.com> wrote: >>>>>> >>>>>> Yeah that looks good. >>>>>> >>>>>> On Oct 20, 2017 6:32 AM, "Brian Brindle" <bbrin...@gmail.com> wrote: >>>>>>> >>>>>>> I'm using some AM29F800BB-90EF I had. Waiting on the AM29F800BB-7EK >>>>>>> from China still. Should be here today. >>>>>>> >>>>>>> >>>>>>> On Oct 19, 2017 8:47 PM, "Brian White" <bw.al...@gmail.com> wrote: >>>>>>>> >>>>>>>> What exact flash part number do you have? >>>>>>>> >>>>>>>> >>>>>>>> On Thu, Oct 19, 2017 at 1:22 PM, Brian Brindle >>>>>>>><bbrin...@gmail.com> >>>>>>>> wrote: >>>>>>>>> >>>>>>>>> I have one put together that programmed up OK but am having >>>>>>>>>issues >>>>>>>>> getting the REX software on it. It erases all the blocks just >>>>>>>>>fine but hangs >>>>>>>>> when re-loading to block 0. Probably something up with the >>>>>>>>>flash.. >>>>>>>>> >>>>>>>>> I'll report back when I have more info. >>>>>>>>> >>>>>>>>> Brian >>>>>>>>> >>>>>>>>> >>>>>>>>> On Thu, Oct 19, 2017 at 7:25 AM, Stephen Adolph >>>>>>>>> <twospru...@gmail.com> wrote: >>>>>>>>>> >>>>>>>>>> Has anyone made a REX successfully with that modified PCB yet? >>>>>>>>>> I would like to know if that artwork is good or bad. >>>>>>>>>> >>>>>>>>>> ..Steve >>>>>>>>> >>>>>>>>> >>>>>>>> >>> >>
