Friday, 2019-02-01

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futarisIRCcloud"export CPU=vexriscv PLATFORM=tomu_fpga_hacker TARGET=usb_nobios" for litex-buildenv / tinyusb-work branch ?03:51
futarisIRCcloudmithro: "export CPU=vexriscv PLATFORM=tomu_fpga_hacker TARGET=usb_nobios" for litex-buildenv / tinyusb-work branch ?03:52
mithroNot quite sure...03:52
futarisIRCcloudxobs / mithro: third_party/litex xobs smaller-crc branch & third_party/valentyusb usb12 branch ?04:30
mithrofutarisIRCcloud: I'm not usre what xobs' smaller-crc branch is04:31
xobsThat was me replacing the crc functions with computed versions, which saves a kb or so of rom space.04:32
mithroxobs: Oh right, in the litex bios04:46
tpbTitle: Snippet | IRCCloud (at
futarisIRCcloudmithro / xobs: I must be checking out the wrong trees for some submodules.04:55
mithrofutarisIRCcloud: You need to go into third_party/litex and add remotes for xobs or my mithro repos04:55
futarisIRCcloudmithro / xobs: Can you guys run a "git branch --contains 55752cdc0c6ccfd8dab0c0ec5fabeb7b684071f1" and tell me what ".git/modules/third_party/litex/config" contains?05:35
xobsfutarisIRCcloud: I'm not at a machine right now, sorry.05:38
mithroxobs: Hrm?05:50
xobsmithro: can't run that command because I don't have a computer in front of me. At least not one with litex installed. (mobile phone)05:52
mithroxobs: sorry05:52
mithrofutarisIRCcloud: hrm?05:52
mithrofutarisIRCcloud: "cd third_party/litex; git remote add mithro git+ssh://" then try again05:53
futarisIRCcloudmithro: I can see the commits, on github, without logging in, but I don't think they can be pulled (without logging in).  Something about the branches.06:45
futarisIRCcloudmigen branch mithro/fsm-decorator-signal-names exists. Not sure about the other two.06:45
tpbTitle: bios: main: remove some excess text to fit it in rom · mithro/[email protected] · GitHub (at
tpbTitle: fhdl/tracer: skip decorator frames · mithro/[email protected] · GitHub (at
tpbTitle: Calculate the reset value for cur_next · mithro/[email protected] · GitHub (at
tpbTitle: Snippet | IRCCloud (at
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xobs<freenode_mit "futarisIRCcloud: "cd third_party"> futarisIRCcloud: you can add them as remotes, just replace "git+ssh" with "https"07:35
futarisIRCcloudxobs: tried that earlier. something about those branches, makes them not show up.07:43
MadHackerFrom /r/nicechips, is nice. 3 output SMPSU/PMIC from a single inductor.08:52
MadHacker(for those who like that sort of thing. :))08:52
MadHackerCan give you 5V, 3.3V, 1.8V from a single 3V input.08:54
MadHacker(or any other voltages you like, it's programmable)08:54
xobsThat is a very nice chip, MadHacker08:55
MadHackerAlso, STM32G-series is just out (90nm version of F-series, can run off a single power pin being one of the nice changes.)08:59
MadHackerExtra GPIOs in the same package - 9 in 64-pin, 7 in 48-pin.08:59
MadHackerNice upgrade.08:59
xobsA nice feature of Fomu is that every part has at least two sources, except the FPGA.09:00
MadHackerThat truly is a nice feature.09:00
MadHackerCan't do much about the FPGA; that said, I'm surprised I don't see more FPGAs available from multiple sources, since they do get used in military gear and that usually insists on second-sourcing.09:01
MadHackerAlso a fun part, - 1Mbit SPI SRAM that has a PAL/NTSC video output as well. Handy if you want a video out from something tomu-sized. :)09:13
tpbTitle: VLSI Solution-VS23S010 - 1 Mbit Versatile SPI / 8-Bit Parallel Bus SRAM (at
MadHackerNow I read, it also has a direct DAC mode, so I guess you could use it for a DDS signal generator or similar.09:27
xobs2600 on a chip?09:28
MadHackerCertainly a 2600 on a USB-port.09:28
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