Can nengo support the negative spikes in hardware?

[xianyi11]

Hello!! I'm excited when I meet the nengo project!! I want to simulate my neuron model in nengo_loihi or nengo_FPGA. However, my neuron model can fire negative spike. I know the nengo support negative spikes in frontend below.

But I wonder if the nengo_loihi and nengo_FPGA can support negative spike, so that I can realize my neuron.

The negative spike is often used in recent ANN-SNN conversion algorithm, such as:
[1] Li, Chen, Lei Ma, and Steve Furber. "Quantization framework for fast spiking neural networks." Frontiers in Neuroscience 16 (2022): 918793.

[2] Hu, Yangfan, et al. "Fast-snn: Fast spiking neural network by converting quantized ann." IEEE Transactions on Pattern Analysis and Machine Intelligence (2023).

[3] Wang, Yuchen, et al. "Signed Neuron with Memory: Towards Simple, Accurate and High-Efficient ANN-SNN Conversion." IJCAI. 2022.

Looking forward to your reply.

[hunse]

Loihi1 does not support negative spikes. Loihi2 may, but it is not supported by NengoLoihi.

I'm not sure about NengoFPGA.