forked from sinara-hw/assembly
56 lines
1.6 KiB
Markdown
56 lines
1.6 KiB
Markdown
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# SUServo (Sampler + Urukul)
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## JSON
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```json
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{
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"type": "suservo",
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"sampler_ports": [<port num>, <port num>],
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"urukulN_ports": [<port num>, <port num>],
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"urukulM_ports": [<port num>, <port num>], // optional
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"clk_sel": 2
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}
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```
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With enabled SUServo mode, you only need to add `suservo` to JSON file, with its Sampler and Urukul(s) removed.
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## Setup
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On bottoms of each Urukul, switch first pins 1 and 2 to `ON`, as on the picture:
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## Testing
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```text
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*** Testing SUServos.
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Initializing modules...
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suservo0
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...done
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Setting up SUServo channels...
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suservo0_ch0
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suservo0_ch1
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suservo0_ch2
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suservo0_ch3
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suservo0_ch4
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suservo0_ch5
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suservo0_ch6
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suservo0_ch7
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...done
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Enabling...
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suservo0
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...done
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Each Sampler channel applies proportional amplitude control
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on the respective Urukul0 (ADC 0-3) and Urukul1 (ADC 4-7, if
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present) channels.
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Frequency: 10 MHz, output power: about -9 dBm at 0 V and about -15 dBm at 1.5 V
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Verify frequency and power behavior.
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```
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1. Connect oscilloscope to the `urukul0` port and configure with time and voltage scale and trigger threshold
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so that you'll see sine wave, like on the picture: 
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2. Verify amplitude and frequency
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3. Apply 1.5V (connect the AA-battery) to the `sampler0` port, as on the picture: 
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4. You should see significant amplitude decrease, as in the picture: 
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5. Verify amplitude difference, and the frequency to be unchanged
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6. Repeat steps 1-5 for every available channel.
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