Deskarano

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  1. Hey @JColvin I tried a few different USB ports (on the same computer, no hub) and also some 5V outlet to USB adapters with various cables: USB port 1: 4.86V USB port 2: 4.90V Wall adapter 1: 4.91V Wall adapter 2: 4.95V
  2. Hey @JColvin Here's the requested measurements: C143: 4.84V C64: .94V C162: 1.34V C159: 1.78V C152: 3.27V All look pretty close to me except the 5V rail
  3. Hi @JColvin, @jpeyron I was wondering if you guys had any updates the overheating issue? I put a heatsink on my Arty and that lowered temperatures 10-15 degrees right off the bat, and its even better with airflow. I would still like to fix the underlying issue if possible though. Thanks, Gregor
  4. Thanks @JColvin! Let me know if I can provide any more information to help out. I'm measuring the resistors and capacitors involved in FPGA power and power regulation right now to see if any of these are at fault.
  5. @jpeyron I have the rev C model @xc6lx45 Okay, thank you. I will try to verify the power nets
  6. Hi again, Sorry for bumping this old topic, but I finally managed to get some good readings on some of the power rail capacitors and resistors. I used this diagram to identify the components to measure: 5V Rail C170: .12V C171: 1.79V C176: 3.26V C177: 3.26V VCCINT Rail C172: 1.78V C173: 3.25V DDRVCC Rail R253: 1.42V C174: 1.24V C175: 3.26V 1.8V Rail R304: couldn't find C180: 0V (missing? see attached) C181: 3.26V 3.3V Rail R254: 4.03V C178: 3.26V C179: .8V (missing?) As I mentioned above, some of the capacitors in this circuit appear to be missing. Here's a picture of what they look like: As I look around the board, there are other components (both capacitors and resistors) that look like this. Is this what they are supposed to look like? Thanks again for all your help, Gregor
  7. Hi @xc6lx45 and @jpeyron I managed to get an XADC configuration working! Here's what the measurements are: 5V power supply voltage: ~4.69V 5V power supply current: ~.588A External supply voltage: not used (~0V) FPGA core current: ~.03A Here is the raw data from the XADC itself, along with the configuration that I used:
  8. Thanks so much for your help! I have tried measuring voltage across these capacitors but have gotten 0v measurements for all of them. I'm also not 100% sure that I'm measuring right; I just placed the DMM's probes on both sides of the capacitor. Is this correct? I can get a basic XADC monitoring project working by tomorrow, probably. I'll follow the instructions on the site you linked. I have not tried using a different cable or PC, but I can try both of these tomorrow as well. I am not using a USB hub.
  9. Thank you, I've confirmed that the Arty is in JTAG mode. I booted it in both modes, and it heated up the same way in both. I've attached ~10 minutes of temperature data; as you can see, it seems to level off at around 71, 72 degrees C. Still well within the temperature range, but hotter than I would like. And no, only the Artix 7 chip itself is hot.
  10. Thanks @jpeyron Attached is a screenshot of my temperature graph, when my Arty is programmed using the provided HDL code. I didn't set the boot mode to JTAG since I've never touched this setting before and I'm not sure where it's located.
  11. Hello, I bought an Arty A7-35T a few months ago. I'm a student in computer science, who wanted to gain some experience in hardware design. I never had any issues with the Arty until a few days ago, where I was experimenting with some configurations involving MicroBlaze and the onboard DDR3. As I was running some code on the MicroBlaze, I noticed that the FPGA chip had become very hot. I figured that this was normal, considering that there is a whole soft processor programmed in the fabric. However, when I unplugged the Arty and re-programmed it with a different, much simpler configuration, it quickly became just as hot. Now, even when the FPGA is unprogrammed, the Artix 7 chip quickly becomes too hot to touch. Is there any way to solve or debug this problem? As I said, I am studying computer science (not electrical engineering) so I'm a bit lost as to how I could solve this issue. Thanks! Gregor Edit: forgot to mention, the Arty still works! It runs any configuration that I program on it, it just also overheats very quickly and I don't want to cause long-term damage to the device.