Add rf and rf_iz neurons to lava

[Michaeljurado42]

Objective of issue: Add rf and rf_iz neurons to lava

Lava version:

• [ ] 0.5.0 (feature release)
• [ ] 0.4.1 (bug fixes)
• [x] 0.4.0 (current version)
• [ ] 0.3.0
• [ ] 0.1.2

I'm submitting a ...

• [ ] bug report
• [x] feature request
• [ ] documentation request

Current behavior:

• No support for rf neurons in lava

Expected behavior:

• There should be a floating point and loihi bit accurate implementation of rf neurons in lava. This implementation should match the lava-dl rf neuron implementations.

Related code:

from lava.proc.rf_iz.models import RF
from lava.proc.rf_iz.models import RF_IZ
...
neuron = RF(shape=(n_neurons,), ..., vth = vth) 
neuron = RF_IZ(shape=(n_neurons,), ... , vth = vth) 

Other information:

This issue is a result of an ongoing lava-dl discussion in which I ask whether or not rf neurons will be added to lava.

Currently I am working on a fork that implements rf and rf_iz versions based on the implementation of their lava-dl counterparts. A proof of concept example can be found here.

[bamsumit]

@Michaeljurado24 thanks for taking this initiative. Let's start a PR (keep it as a draft). Then I can look at the PR and provide more feedback.

[Michaeljurado42]

No problem. The GT community and I are very excited about this capability so I am happy to contribute. I can make a PR tomorrow.

[Michaeljurado42]

draft pull request here