Allan Flippin

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  1. kwilber Thanks! That's what I need to know for now. I'm solidifying my choice of board and trying to locate anything which can't work with the board that I choose. I've been leaning towards Arty A7, and this was the last potential gotcha I have to check. I'll move forward now and assume Arty A7 is it. I'm still trying to get my company to install Vivado on my PC, or I would have been able to look myself directly. Allan
  2. Thanks for your replies. Sure, if I can use the single USB cable for debug plus device configuration, I'll be glad to do it! I just didn't understand how Vivado would know about the USB-to-FTDI chip link for the Arty A7. Isn't this why we require Adept for configuration instead of doing it directly by Vivado? Also, I'm I'm using a UART bridge for communicating with the Arty A7, wouldn't debug wreck that connection? I'll look at the videos, but I doubt this sort of thing is covered, PC communication with the Arty boards is not something that most people do. Allan
  3. I'm looking through Xilinx file pg115-mdm.pdf about the Microblaze debug module. If I use a Microblaze core, I'm sure I'll need some debug capability. But I'm not sure how the MDM can be used on an Arty board. MDM seems to be a JTAG-based debugger. I think it uses the FPGA's JTAG pins. I know the Adept2 utility uses the USB connection to access JTAG through the FTDI chip. But "JTAG debugging" isn't on the list of what Adept2 does. In the Adept SDK, I see information about an API to access JTAG. That would probably work, but I'd rather not be debugging debug system software while I'm trying to debug my Microblaze software. Another issue is if I use the existing USB cable for JTAG debugging, will I have trouble running the UART bridge interface? If I get a Digilent JTAG-HS2 and use that for JTAG, will that solve the problems? The Vivado software would know how to use the JTAG on this adapter for its debugger right? And the UART bridge would still work as usual. Do I have it right? Or am I missing something stupid. I just want to make sure there's no problem with Microblaze debugging that makes it too hard to use in my application. Thanks. Allan
  4. Jon, Thanks. I'm looking at the information from ftdichip.com. The only thing I'm unclear about is how the baud rate is set? I'm trying to find out if my HDL UART block will need auto-baud detect. Allan
  5. Jon, I think the USB UART bridge would work for me. I shouldn't need more than 1Mbaud. I'd use it to transfer the contents of block RAM to/from PC. A few seconds to transfer the data seems fine. As xc6lx45 suggests, it would be a good idea to transfer in Hexscii so I can add a simple command set to control the process. Looking at the Arty Z7, I see a different problem. That board doesn't have an FTDI controller. I see that instead the board has a TI USB Phy and uses the USB controller embedded in the Zynq 70x0. In that case, is there any way at all to transfer application data over USB with the PL? This isn't a show stopper for me. I don't think I'd benefit much from having ARM CPUs for this application. Thanks for all your help! Allan
  6. Jon, Yes. You've hit upon my issue. The memory read/write functions in the Adept 2 utility were very useful with the Nexys 3. Does it seem I can still access data through the utility, but I need support in my FPGA code to make the connection to block RAM or whatever I'm using? Sorry, if I had the board here, I'd just experiment. But this is going into my decision whether to buy this or a different board for the job. Allan
  7. Jon, Thanks for the speedy reply. Now I'm trying to figure out why I thought Adept 2 wouldn't work on Arty boards. If indeed it does, my problems are solved. I'll check the documentation. If not, I can use a UART as xc6lx45 suggests. Thanks to you both. Allan
  8. I've used the Nexys 3 board for some time and I've found the adept 2 utility to be very useful! I used the utility to write data to my Nexys 3 board and also read back results to my PC after running some tests. As long as my FPGA code could access the memories properly, I knew I could transfer results to and from my PC. I'm now looking into moving to one of the Artix-based boards. But Adept doesn't work with them. I've read the documentation and I don't see any replacement for this capability. On one of the Arty boards, how does one transfer data with a PC? I suppose Ethernet could be used but wouldn't that require lots of software? Perhaps I'm missing some basic concept. Thanks for any help! Allan
  9. Jon, Thanks for your speedy reply. The Zynq Book in particular looks very useful. I don't need Linux, but I do need to write software on the ARM. I'll be using the Atry Z7 to help me test an SMBus peripheral chip that I just finished designing. That chip has a good bit of analog. I'll put the chip and associated circuitry on a board that connects to the Z7 through the Arduino shield interface. I don't have any video, ADC or high-speed serial. I just need the ARM to feed commands to my chip and monitor its results. The chip uses alerts, so I'll need to write an interrupt handler for it. That's why i don't want the Linux overhead, because it would mess up my interrupt handler timing. Allan
  10. Looking through the Arty Z7 documentation, I see that mostly it's about people running Linux on the embedded ARM. My application is more bare-bones. I'll need to write C code for the ARM including interrupt handlers. This needs to be real-time, so I can't afford the overhead of Linux running. In the reference manual, I see that "bare metal" programming on the ARM is possible. But I've not been able to locate any documentation for this. Have you got something I can read? I just want to make sure the job is not way too complicated before embarking on it. Thanks!
  11. Thanks JColvin and Bianca. Yes, I had searched online for that part. I noticed a few sources, but all in the UK and none in the US. That doesn't bother me, except I thought perhaps the connector was being phased out. Allan