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| xobs | tnt: that is a very, very nicely-written article. And it's nice to have target values. I'd like to, at the very least, replace the `epfifo` interface with something else. | 00:48 |
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| xobs | Probably add a Wishbone interface, as well as a Fake Serial interface that doesn't require a CPU. | 00:49 |
| xobs | The Fake Serial interface would let us use the debug bridge to debug hardware blocks more easily. | 00:50 |
| xobs | It also would make it easier to set up a USB simulator to work with the valentyusb core. | 00:50 |
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| tnt | xobs: yeah implementing a 'data pipe' from usb to custom logic without having a CPU would be very nice. | 05:24 |
| tnt | xobs: I pretty much gave up on that on my side :/ My current plans to have a 'minimal' thing like that is to replace the riscv with a more minimal CPU I designed because I just have a hard time seeing how to respond to all the control request in a half-way complant way without it. | 05:25 |
| xobs | tnt: all that it needs to do is enumerate as *something*. Which it sounds like yours does, and tinyfpga does, and a bunch more do. It's just another state machine to glom onto the lower-level SM. | 05:26 |
| tnt | Even the original TinyFGPA boot loader (which is far from compliant) is already 1400 LCs. | 05:26 |
| xobs | That one enumerates as a CDC-ACM though, right? So it has multiple endpoints to deal with. We'd only need EP0. | 05:27 |
| tnt | Yes it does CDC-ACM. But you said above you wanted a fake serial interface ? | 05:28 |
| xobs | You're right. My mistake. We just need a Fake Interface. | 06:52 |
| xobs | All it needs to do is respond to the common requests (device and configuration descriptors), and that's it. | 06:53 |
| xobs | Could get fancier and respond to string requests. | 06:58 |
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| mithro | xobs: How do I build a RPi image for a production Fomu tester? | 23:17 |
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