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| emeb | tnt: when I built the riscv gcc toolchains there were 4 different ones created riscv32 [i, ic, im, icm] - which is the right one to use? | 00:16 |
|---|---|---|
| emeb | hmm... your makefile asks for riscv-none-embed with -march=rv32i so I assume that's not the same toolchain as clifford originally was using for his picoRV32 stuff which was all based on the riscv32-unknown-elf stuff | 00:27 |
| emeb | I'll try just changing $(CROSS) to point to my riscv32i stuff | 00:30 |
| emeb | seems to have built. loaded the bitstream and firmware into the flash and the thing configures OK | 00:41 |
| emeb | what's the uart baudrate? | 00:41 |
| emeb | ah - 1Mbps | 00:43 |
| emeb | works | 00:43 |
| emeb | getting the Command prompt | 00:44 |
| emeb | ok - "r" command starts USB and I get enumeration on my PC | 00:44 |
| emeb | so - seems your stuff works on my board | 00:45 |
| emeb | lots of [!] Got SETUP while busy !?? - I assume that's just because it's not fully finished. | 00:47 |
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| emeb_mac | pushed new video stuff -> https://github.com/emeb/up5k_basic | 04:19 |
| tpb | Title: GitHub - emeb/up5k_basic: A small 6502 system with MS BASIC in ROM (at github.com) | 04:19 |
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| tnt | emeb_mac: so it enumerated ? | 06:24 |
| tnt | emeb_mac: mmm, that message is actaully an error, it shouldn't happen. | 06:24 |
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| emeb_mac | tnt: it seems to have enumerated - happy seeming messages in the Linux syslog | 06:29 |
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| emeb_mac | that's a lot further than I got with the tinyfpga bootloader on the same hardware | 06:33 |
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| tnt | emeb_mac: if you do a lsusb -v -d 1d50:e1e1 does it show all the fields or does it show any error ? | 06:44 |
| emeb_mac | tnt: tried starting up again on another machine and it's not spewing those errors. lsusb seems to show all the fields. | 06:49 |
| emeb_mac | so - must have been some kind of fluke / intermittent thing. | 06:49 |
| tnt | possible. I don't actually detect/take into account usb reset at the moment so it might have been in a weird state at the beginning. | 06:50 |
| emeb_mac | here's the output: https://pastebin.com/tkDZjkjC | 06:51 |
| tpb | Title: $ lsusb -v -d 1d50:e1e1 Bus 001 Device 005: ID 1d50:e1e1 OpenMoko, Inc. Co - Pastebin.com (at pastebin.com) | 06:51 |
| emeb_mac | possibly some missing stuff | 06:51 |
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| emeb_mac | (according to msg at top) | 06:51 |
| tnt | Oh you need sudo | 06:51 |
| emeb_mac | https://pastebin.com/6P86ZPZ5 | 06:53 |
| tpb | Title: Bus 001 Device 005: ID 1d50:e1e1 OpenMoko, Inc. Device Descriptor: bLength - Pastebin.com (at pastebin.com) | 06:53 |
| emeb_mac | no err at top, but errs at bottom now | 06:53 |
| tnt | Yeah those are 'expected'. It just doesn't support those features (and that's perfectly fine according to specs, they are not mandatory). | 06:55 |
| tnt | Nice. Now just need to implement DFU to make it do something useful :p | 06:56 |
| emeb_mac | sweet - nice to see that it's working. Also nice confirmation that my board supports USB. | 06:56 |
| tnt | yup. | 06:56 |
| emeb_mac | it's all just software now - easy. :P | 06:57 |
| tnt | Well ... I need an SPI controller. | 07:00 |
| tnt | But I think I'll use the hard IP for this. | 07:00 |
| tnt | The hard IP interface is wishbone like, so it's pretty easy to connec to the picrorv32. | 07:00 |
| emeb_mac | Sounds fun - I've never heard of anyone actually using those hard IP SPI / I2C cores | 07:01 |
| emeb_mac | is that because the current SPI flash interface is read-only? | 07:02 |
| tnt | yeah and it's not even accessible by the picorv32. Basically once the pll locks, a small state machine copies 32k of the flash to one one the SPRAM block, then releases the reset of the picrorv32 and it boots from that SPRAM. | 07:03 |
| emeb_mac | ah, ok - I hadn't studied it. | 07:04 |
| tnt | I'm wondering if plugging my hdmi video core into the 6502 would be doable. | 07:08 |
| emeb_mac | that'd be interesting | 07:08 |
| tnt | Probably need some 'paging' mechanism because (1) it expects a 16 bits data bus, (2) it has a 48k address space :p | 07:09 |
| emeb_mac | a bit of glue - easy to add | 07:09 |
| emeb_mac | bedtime - gn | 07:10 |
| tnt | gn | 07:12 |
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| somlo | daveshah: can you rebase PR 219 to the new nextpnr master? (getting a merge conflict in common/placer1.cc) | 13:20 |
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| emeb | tnt: looking at the SB_SPI documentation from Lattice - cute how they don't actually provide a register map for it. | 15:58 |
| emeb | (until you go to the 3rd level "advanced" document) | 16:00 |
| emeb | Was thinking of hooking that up to the 6502 - would require building a wishbone master for the 6502 and using the RDY line to stall the CPU during the transaction. | 16:10 |
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| tnt | emeb: you can also consider a non-transparent bridge. | 17:35 |
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| janrinze | daveshah: does the recent changes in nextpnr mean that inout can be used on pins now without specific SB_IO stuff? | 20:41 |
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