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Hi,
As per
https://github.com/aws/aws-fpga/blob/master/hdk/docs/AWS_Shell_Interface_Specification.md#interrupts
There are two sets of signals to generate interrupts:
cl_sh_apppf_irq_req[15:0] (from CL to SH)
sh_cl_apppf_irq_ack[15:0] (from SH to CL)
This interface uses single clock pulses for the req/ack. The CL asserts (active high) cl_sh_apppf_irq_req[x] for a single clock to assert the interrupt request to the SH. The SH will respond with a single clock pulse on sh_cl_apppf_irq_ack[x] to acknowledge the interrupt. Once the CL asserts a request on a particular bit[x], it should not assert a request for the same bit[x] until it has received the ack for bit[x] from the SH. The CL may assert requests on other bits[y] (y!=x).
HTH, Thanks & Regards,
Omkar Kadam
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