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| pepijndevos[m] | can ecppack generate an SVF for loading the bitstream into flash? | 15:05 |
|---|---|---|
| gatecat | no but there was a python script floating around for that | 15:19 |
| gatecat | it's suboptimal because it has to use conservative delays as it can't read the flash busy status | 15:19 |
| gatecat | https://gist.github.com/gregdavill/4f9f536757966171ef974f98348bbacb | 15:20 |
| pepijndevos[m] | hmmm okay I might try that | 15:26 |
| pepijndevos[m] | another option is to learn how openocd works... because supposedly glasgow jtag-openocd could maybe do this?? | 15:27 |
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| lkcl | there's a repo around that does this | 15:58 |
| lkcl | it's used by microwatt 1 sec | 15:59 |
| lkcl | bscan_spi_bitstreams | 15:59 |
| lkcl | https://github.com/quartiq/bscan_spi_bitstreams | 15:59 |
| lkcl | a port to nmigen apparently supports lattice ECP5s https://github.com/quartiq/bscan_spi_bitstreams/blob/master/lattice_bscan_spi.py | 16:00 |
| lkcl | i haven't tested it | 16:00 |
| lkcl | (i'm using the xc3s100t one for the arty though, works great) | 16:01 |
| lkcl | this script by the microwatt team auto-generates the openocd cfg file which loads the spi-bitstream-loader which .... | 16:03 |
| lkcl | https://github.com/antonblanchard/microwatt/blob/master/openocd/flash-arty | 16:03 |
| pepijndevos[m] | looks like litex first converts the bitstream to svf and then feeds it to openocd so openocd isn't going to help it looks like https://github.com/enjoy-digital/litex/blob/20e910b83693f602f637da68ce185873e5cb1513/litex/build/lattice/programmer.py#L34-L44 | 16:06 |
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| * lkcl trying to remember what i used to upload to the VERSA_ECP5 | 16:24 | |
| lkcl | ah! ecpprog | 16:24 |
| lkcl | https://github.com/gregdavill/ecpprog | 16:25 |
| lkcl | which is as simple as "ecpprog -o {offset_into_flash} {name_of_a_binary}" | 16:25 |
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| lkcl | was wondering why you were having difficulties using ecppack, i misremembered it's ecpprog i used instead | 16:26 |
| pepijndevos[m] | because ecpprog only works with FT2232 style devices, and not with glasgow | 16:51 |
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| lkcl | ahhh. missing context. | 17:58 |
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