TMS320F28P550SJ: arc detect on multi channel

Hello Terry 

Could you please ask customer to test each channel separately first. Lets see if each channel works as expected. If yes, there may be something wrong in the channel switching.

Can you also tell if customer is using DPSDK version of Arc fault firmware and AFE board?

Thank you

Amir Hussain

Hi Amir

Customer is using DPSDK of Arc Fault firmware and AFE board, they could run well for each channel separately in same firmware, only happen issue while enable 2 or 3 channel instead of only 1 channel.

As you may see in the code capture, they store each channel ADC data by independence buff like ADC_INPUT_A[], ADC_INPUT_B[], ADC_INPUT_C[]; however do analyze for each channel by using common variable like model_input_top[], result.buf0[], fftwindow[], what I want to double confirm if they need clear these common variable before using in each channel analyze?  

Hello Terry

In the original code, the ADC data of the selected channel goes to buff[A]. When buff[A] is full, this data gets processed for ARC detection. In the mean time buff[B] is filled with the data of same channel. When customer switches the channel, does he make sure that the buff[A] and buff[B] will take the data from the other channel? What I want to convey is that both buff[A] and buff[B] takes data from the selected channel. These buffers are not meant to take data from two different channels.

Thank you 

Amir Hussain

Hi Amir

We solve this issue by create three buff for model_input_top[], and use it independence for each channel.