Day36 - IIO Triggered Buffer

Objective

• Enable IIO buffer
• Bind trigger
• Stream data from sensor
• Validate frame structure

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Step 1 - Verify device

ls /sys/bus/iio/devices/
cat /sys/bus/iio/devices/iio:device0/name

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Step 2 - Enable scan elements

cd /sys/bus/iio/devices/iio:device0/scan_elements

echo 1 > in_voltage0_en
echo 1 > in_voltage1_en
echo 1 > in_voltage2_en

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Step 3 - Find trigger

ls /sys/bus/iio/devices/trigger*
cat /sys/bus/iio/devices/triggerX/name

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Step 4 - Bind trigger

echo myadc_iio-dev0 > ../trigger/current_trigger

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Step 5 - Configure buffer

echo 16 > ../buffer/length

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Step 6 - Enable buffer

echo 1 > ../buffer/enable

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Step 7 - Read samples

dd if=/dev/iio:device0 bs=6 count=10 | hexdump -C

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Expected

• Data increments steadily
• Frame size = 6 bytes
• Channels aligned correctly

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Step 8 - Cleanup

echo 0 > ../buffer/enable
echo "" > ../trigger/current_trigger

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Result

• Verified trigger-driven streaming
• Confirmed correct scan layout
• Validated end-to-end data path

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