forked from sinara-hw/assembly
55 lines
2.3 KiB
Markdown
55 lines
2.3 KiB
Markdown
# Sinara 7210 Clocker
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[Wiki](https://github.com/sinara-hw/Clocker/wiki)
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## JSON
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Put the `ext_ref_frequency` field into the JSON description if the Kasli is going to use an external frequency:
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```json
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{
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"hw_rev": "<hw rev>",
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"base": "<base>",
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...
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"ext_ref_frequency": <freq in Hz>,
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...
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"peripherals": [...]
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}
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```
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On peripherals you should choose `"clk_sel": 2` on connected devices.
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## Setup external clocker
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For tests, you may need an external RF generator, depending on customer needs.
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Here is example setup for SynthNV RF signal generator:
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1. Connect SynthNV to the workstation via USB, and
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2. Install and run `cutecom`: `nix-shell -p cutecom`
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3. Set settings as on the picture below:
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4. Open the device, usually it is `/dev/ttyACM0`
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5. Put `?` into `Input` field and press `Enter` for current settings and help commands
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6. For changing the frequency, enter `f<freq in MHz>`, e.g. `f125.0` for 125 MHz
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7. Set RF power so that clocker would recognize the signal with `a<power>` command, e.g. `a63`
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8. Check for desired amplitude and frequency at the `RFOut` (see picture below for reference) pin via oscilloscope
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9. If everything is ok, connect `RFOut` to the `CLK IN` on the Clocker (see instructions below for details)
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### Setup the Clocker
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1. Switch `CLK SEL` pin to `EXT`/`INT` according to customer needs
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2. Connect MMCx cables according to the customer needs and boards specifications (see image below for reference):
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if the `INT` source is chosen, connect MMCx cable to `INT CLK`, otherwise connect external clocker to SMA `EXT CLK`
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3. Connect the Clocker to the Kasli via 30-pin ports
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4. Connect the Clocker's SMA output to the Kasli's `CLK`/`CLK IN` SMA pin
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5. After assembling the crates and flashing the firmware, start Kasli and write config as follows:
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`artiq_coremgmt config write -s rtio_clock ext0_bypass`. Please refer to the [official manual](https://m-labs.hk/artiq/manual/installing.html#miscellaneous-configuration-of-the-core-device)
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for the details and available options
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6. Reboot either via `artiq_coremgmt reboot` or via power supply if the board's firmware doesn't have such command
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## Testing
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Run `artiq_sinara_test` and check that it doesn't fail on the connected devices.
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