Un-unzip the Quartus II Note: 1. See Figure 3 2. This panel allows you to generate and receive packet. Configure the packet as below. Set Information at Tx Address[] field. Maintenance Read Following header setting need to be done before start the Maint Read transaction test: 1. Maintenance Write Following header setting need to be done before start the Maint Write transaction test: 1.
Port Write Following header setting need to be done before start the PortWrite transaction test: 1. Message Packet Following header setting need to be done before start the Message transaction test: 1. Total of 12bit. Version history. Last update:. Updated by:. This isn't necessarily difficult it just means that the mapping of signals is different. In fact, because of the lack of a suitable MM slave equivalent to the ST 'channel' signal it would likely be best that the ST to MM convertor be written so that the MM side is a master and not a slave.
The last clinker will come in if your other Avalon devices require byte enables and data resizing. That's gets a bit more complex but not impossible then I want to go into here No matter how you cut it, the logic to implement the ST to MM bridge is not at all difficult to come up with. Now that I've walked you through the basic steps for creating the convertor, the real question is why? ST data transfers are fundamentally nearly the same as MM.
In some ways it is easier to grasp, I'm not getting how you think it is harder than MM and how any designer would have trouble with ST but not MM But in any case, you should have enough info now to construct a bridge between the two protocols..
Good luck. The thing that is confusing me is that the ST bus is packet based. These packets contain PCIe protocol specific information. For example if it is a command request then it contains the tag, requester ID. Thus I see the command on ST bus form PCIe hatrdIP, I need to process the response that has some the attributes of the request - response may need to contain the tag used on the corresponding request as per my understanding.
But if we use the Avalon-MM bus then all that is transparent. Is that true? You can refer this smartbook which did same interaction with blockchain but with implementation of web3. RPC url is required for our program to interact with a blockchain network.
You can check different methods to connect through providers in this smartbook. For this example provder we will be using is Infura via http. All we have to do is create an account and generate a project which will provide us with rpc url for created project's api key. You can get test tokens from ropsten faucet. Enter your address and click on submit. All in all it seems like a great example design. However, since its been created in an older version of Quartus, I can't build it.
For an endpoint it seems pretty straightforward since the TLPs can only be addressed to either one of the BARs, an expansion ROM or the rest of a device's memory space.
For a rootport it seems a little more complicated however, since there are also bits for the primary, secondary and subordinate bus number window as well as an IO, non-prefetchable and prefetchable window. It is my understanding that these last 3 windows are used to map all PCIe addresses inside the rootport. I wonder how exactly this is done, since it seems received TLPs are involved. Those bus number windows are also vague to me. If you're building a root port, then there usually isn't anything in the IP.
It's mainly just going to pass requests through from one side to the other. Many of the config space registers don't really affect the operation of the downward-facing ports, anyway. You'll also have to provide some method for higher-level software to access the configuration space of downstream devices and configure them appropriately, as well as provide a bridge from the CPU address space to PCI express operations so that system software can perform reads and writes on PCIe devices.
JTAG will not be involved at any point. Fair enough, looks like they're basically just going to emulate the whole host side in software. That's more or less right, except the root port will send either type 0 or type 1 configuration requests depending on where the target device is located within the PCIe topology.
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