[ARTIQ] Urukul timing & phase
Hi all, I have more basic questions regarding timing DDS output from Urukul. So we have version 1.1 with AD9912 (14-bit phase resolution). First of all, how does one select the MMCX input for internal clock (for locking with Kasli's clock output)? I'm assuming that's done with the DIP switches on the board, but I couldn't find any documentation on that. Generating pulses with known frequency works fine by doing e.g (2 channels with fixed phase relation). ... self.urukul0_ch0.set(10*MHz, phase = 0.0) self.urukul0_ch1.set(10*MHz, phase = 0.0) ... self-urukul0_ch0.sw0.on() self-urukul0_ch1.sw0.on() delay(10*us) self-urukul0_ch0.sw0.off() self-urukul0_ch1.sw0.off() delay(10*us) ... Initial phase of pulse varies from run to run, but I assume that's because I'm using the internal XO of Urukul (100 MHz), which is not locked to Kasli's timeline. Relative phase can be adjusted with the phase parameters in the set methods above, but results are counterintuitive. For example value of 0.1 equals to about 180 degrees at 10MHz, but not for e.g. 11MHz. I understood from the documentation, that phase units are turns (i.e. 1 turn = 2*pi) in the DDS frequency, but apparently it's not so? Quick browse of the source for the AD9912 module seems to indicate, that the phase value above is scaled to a 16-bit integer, although the phase resolution is only 14 bits (even AD9912 indicates, that the chip takes a 14-bit word for phase adjustment)? So how does one get relative phases of the DDS-channels set correctly? Thanks in advance! BR Kalle Hanhijärvi ___ ARTIQ mailing list https://ssl.serverraum.org/lists/listinfo/artiq
Re: [ARTIQ] Elementary problems with Kasli
Hi David, Ok, thank you, checking the boot logs did the trick. Apparently the MAC address I had generated wasn't an appropriate unicast address. Newly generated MAC seems to work just fine. - Kalle -Original Message- From: David Nadlinger On Behalf Of David Nadlinger Sent: 1. lokakuuta 2018 20:04 To: Hanhijärvi Kalle Cc: artiq@lists.m-labs.hk Subject: Re: [ARTIQ] Elementary problems with Kasli Hi Kalle, On 1 Oct 2018, at 15:30, Hanhijärvi Kalle via ARTIQ wrote: > Following this I set IP and MAC addresses: > > $ artiq_mkfs flash_storage.img -s mac 75:53:7b:9c:63:14 -s ip > 192.168.1.10 > $ artiq_flash -t kasli -f flash_storage.img storage start > > Now I tried to write the core kernel to the board by (after successful > compilation of idle_kernel) > > $ artiq_coremgmt config -f idle_kernel idle_kernel.elf > > This gives an error about having no route to host. So I can't > establish a network connection to the board. Can you ping the board on the command line using that address? You might also want to have a look at the serial console while the Kasli is booting up for relevant debug information (e.g. using `flterm /dev/ttyUSB1`). Best regards, David ___ ARTIQ mailing list https://ssl.serverraum.org/lists/listinfo/artiq
[ARTIQ] Elementary problems with Kasli
Hello, I'm not sure if this is the right forum for a technical question such as this, so my apologies if this is inappropriate. We recently acquired Kasli (v. 1.1.) board with Urukul DDS addon, and now we've had some elementary problems when in the installation. So I've been following the 4.0.dev-branch documentation for installation. While installing artiq packages using conda, I assumed we had opticlock-variant of kasli (so I figured out from the documentation). I was able to flash FPGA gateware bitstream by doing: $ artiq_flash -t kasli Following this I set IP and MAC addresses: $ artiq_mkfs flash_storage.img -s mac 75:53:7b:9c:63:14 -s ip 192.168.1.10 $ artiq_flash -t kasli -f flash_storage.img storage start Now I tried to write the core kernel to the board by (after successful compilation of idle_kernel) $ artiq_coremgmt config -f idle_kernel idle_kernel.elf This gives an error about having no route to host. So I can't establish a network connection to the board. Here I prepared device_db.py, with core_addr = "192.168.1.10". Is this correct way to set the target IP address? Configurations are done on a computer with IP set to 192.168.1.1, netmask set to 255.255.255.0 and connected to the Kasli board through a gigabit switch with SFP ports. On Kasli, I'm using SFP0 port for the fiber. Any ideas? am I doing something wrong? BR Kalle Hanhijärvi ___ ARTIQ mailing list https://ssl.serverraum.org/lists/listinfo/artiq
