8Strings82

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  1. Hello to everyone, Some months ago I bought a ZyBO Z7 board to start making experience with Vivado and Xilinx FPGAs. I have followed the getting started tutorials, and developed the example using the on oboard switches and leds. I am able to program the fpga and the example works almost fine. I have tried to use putty to test the serial communications and see some output messages. I have configured putty to use a baud rate of 115200, with a parity bit and 1 byte lenghts for the messages. When I open the terminal I see no data at all. I have tried different baud rates but it seems to me that the UART is not programmed correctly, it might depent from the configuration of the PL. How can I debug this? I think that when the board was brand new, the serial connection was working correctly, since I could see the messages of the linux OS installed on the SD Card. I have also seen that the PROGB led is always off. How can I debug this? Is there a way to put the board back to a stable state (something like a factory reset) ? Thanks to everybody for your advices, Giovanni
  2. Hi, I have solved the problem, I have connected the device to the USB behind my PC instead of connecting it to the front panel. Now I get a new warning: WARNING: [Labtools 27-3123] The debug hub core was not detected at User Scan Chain 1 or 3. Resolution: 1. Make sure the clock connected to the debug hub (dbg_hub) core is a free running clock and is active OR 2. Manually launch hw_server with -e "set xsdb-user-bscan <C_USER_SCAN_CHAIN scan_chain_number>" to detect the debug hub at User Scan Chain of 2 or 4. To determine the user scan chain setting, open the implemented design and use: get_property C_USER_SCAN_CHAIN [get_debug_cores dbg_hub]. Any idea?
  3. Hi, thanks for your advice. I have tried to install them manually as you suggested, but I still get the same error.
  4. Hello Everybody, I am new to the forum, and I am about to ask a question about a problem with my new Arty development kit. I have installed Vivado succesfully. When I connect the board for the first time, after installing the whole software, windows is installing drivers for the board, but fails in retrieving one of them (USB serial driver (COM1)). As a result, when I start Vivado and I try to open the target I get the following error: ERROR: [Labtoolstcl 44-26] No hardware targets exist on the server [localhost] Check to make sure the cable targets connected to this machine are properly connected and powered up, then use the disconnect_hw_server and connect_hw_server commands to re-register the hardware targets. I have looked around for a solution but didn't find anything. Does somebody already had this error? How can I solve it? I have already tried to uninstall Vivado, restart the PC and install it again, but didn't work. I also tried to install the cable drivers manually from consolle, but I am stuck witht the problem. Thanks in advance for your help and time. Giovanni.