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Theja's avatar
Theja
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3 years ago

eSPI agent core, memory write and memory read access

Hi, I want to use Intel eSPI agent core in MAX10 device for accessing general addresses. Can I use peripheral channel with memory read(32-bit) and memory write(32-bit) for accessing the user ...
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Theja's avatar
Theja
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3 years ago


Hi,
The Intel eSPI Agent Core is receiving a PUT_MEMRD32_SHORT (1 byte) packet from the eSPI master. I am reading out the Non-posted RX FIFO('h10) via IP core's Avalon MM bus until RX queue is empty. I am getting the address and like to respond the associated data. So I am writing the following data in the NPTXFIFO (14h) :

- Byte 1: 0Fh (cycle type)
- Byte 2: 00h (length MSB)
- Byte 3: 00h (length LSB)
- Byte 4: 55h (Data)

After that I am writing 02h (NPTXFIFO_AVAIL) to the IP core's Control Register (4h).

But the Agent is only sending DEFER, it doesn't send the response with the data.

Is I am doing in correct way?

Regards

Theja