| openpowerbot | [slack] <Paul Mackerras> how do people program the bitstream into the orange crab? I have been trying with dfu-util and that seems to work for small things but not something as big as microwatt | 10:50 |
|---|---|---|
| openpowerbot | [slack] <Paul Mackerras> @Anton Blanchard or @Michael Neuling maybe? | 10:51 |
| lkcl | Paul: that sounds... anomalous | 14:42 |
| lkcl | like, a hardware reliability issue | 14:42 |
| openpowerbot | [slack] <Matt Johnston> @Paul Mackerras dfu-util works fine for me | 15:06 |
| openpowerbot | [slack] <Matt Johnston> though more recently I've been using apollo firmware on a samd21 board, https://github.com/mkj/apollo/tree/qtpy is my branch | 15:07 |
| openpowerbot | [slack] <Matt Johnston> though more recently I've been using apollo firmware on an adafruit qt py samd21 board (what I had lying around), https://github.com/mkj/apollo/tree/qtpy is my branch | 15:11 |
| openpowerbot | [slack] <Matt Johnston> though more recently I've been using jtag with apollo firmware on an adafruit qt py samd21 board (what I had lying around), https://github.com/mkj/apollo/tree/qtpy is my branch | 15:51 |
| lkcl | Matt: what device are you connecting to with dfu-util, that "works"? | 18:36 |
| lkcl | Paul: the orange crab is, i believe, china-designed and china-made. it um... maaay not be the best quality. | 18:37 |
| lkcl | and i've seen issues where people have said that their builds of microwatt are unreproducible... oh wait, that was Gustavo, on here :) | 18:37 |
| lkcl | Paul: in case there's a Ground-Loop issue (which, on smaller bitstreams would not be a problem), can i recommend running solely from laptop battery? | 18:39 |
| lkcl | but also, if it's possible to give dfu-util an upload baud rate as an option, reduce it considerably | 18:40 |
| lkcl | oh hang on it's not china-designed at all | 18:42 |
| lkcl | it's Open Hardware, cool! | 18:42 |
| lkcl | https://github.com/orangecrab-fpga/orangecrab-hardware/blob/main/hardware/orangecrab_r0.2.1/Production/OrangeCrab_r0.2.1_sch.pdf | 18:42 |
| lkcl | https://groupgets.com/manufacturers/good-stuff-department/products/orangecrab | 18:42 |
| lkcl | ah. | 18:42 |
| lkcl | warl, thay'rrs yurr praahhblurm | 18:43 |
| lkcl | it's an ECP5-25k | 18:43 |
| lkcl | only 25k LUT4s | 18:43 |
| lkcl | and microwatt is pushing the limit there at around 20k LUT4s. | 18:43 |
| lkcl | https://youtu.be/TnppaqIHQUY?t=21 | 18:47 |
| lkcl | :) | 18:47 |
| openpowerbot | [slack] <Anton Blanchard> @Paul Mackerras I have a pre production board and the flash is not big enough for the 85F, so I have to use JTAG. | 22:19 |
| openpowerbot | [slack] <Anton Blanchard> lkcl: I think Paul has an 85F version | 22:20 |
| lkcl | Anton: ahh | 22:54 |
| lkcl | then i'd suspect hardware reliability. dfu-util apparently doesn't support "speed control" | 22:57 |
| lkcl | so that's a bit challenging to test | 22:57 |
| lkcl | some people have reported success by connecting via USB hubs | 22:58 |
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