Trill Ring GUI visualisation?

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Trill Ring GUI visualisation?

anna

Hi,

The Trill schematic (https://opencircuit.nl/resources/file/c2c175a95358b94f732f0bb6c8ee49084afe3706466/Trill-gegevensblad.pdf)) indicates that 0-degrees is 90-degrees to the right of the EVT pin, looking at the Ring from the back (i.e. right over the 'I' in the 'Trill' logo printed on the back of the sensor).

However, when I visualise my finger location using the example project "multiple-devices" (https://github.com/BelaPlatform/Bela/tree/master/examples/Trill/multiple-devices), the red dot showing my finger location appears to be shifted 90-degrees clockwise, i.e. the expected origin point indicated in the schematic appears at 90-degrees on the Ring visualisation.

Is the visualisation in the example rotated, or is my understanding of the Trill schematic incorrect?

Many thanks in advance,

anna

Just following up on this issue:

Is the Trill Ring GUI visualization (generated by the example visualization code) rotated 90-degrees counter-clockwise? (where the red dot indicating finger position is displayed at 0-degrees when the touch location on the sensor is .75 according to the Trill schematic).

And is this location determined in lines 107-113 of https://github.com/BelaPlatform/Bela/blob/master/libraries/Trill/Trill.js?

Thanks in advance!

giuliomoro

Hi, I just checked this. The datasheet is correct and the ring in the GUI visualisation is rotated by 90 degrees clockwise (I think?) with respect to the datasheet.

This should fix it. Let me know if it does.

anna

Hi Giulio, Yes, this code correction fixes the problem!See below screenshot where I plotted locations 0 (left) and .5 (right). Many thanks for this correction!
alt text