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| futarisIRCcloud | xobs: Sweet. loopback is always the best simple test. | 00:54 |
|---|---|---|
| xobs | futarisIRCcloud: simple but effective! It should be enough to hook up Python now. | 00:55 |
| futarisIRCcloud | xobs: I take it I have to install nextpnr, icestorm and yosys from source? | 00:59 |
| xobs | futarisIRCcloud: better suggestions are welcome. I have prebuilt versions for Raspberry Pi, but that's not really feasible for synthesizing all of Foboot. | 01:02 |
| xobs | FPGAwars has some binaries: https://github.com/FPGAwars/toolchain-ice40/releases | 01:02 |
| tpb | Title: Releases · FPGAwars/toolchain-ice40 · GitHub (at github.com) | 01:02 |
| futarisIRCcloud | Maybe best just throw the instructions from http://www.clifford.at/icestorm/ at the top of the readme and/or point to the toolchain-ice40 ... | 01:10 |
| tpb | Title: Project IceStorm (at www.clifford.at) | 01:10 |
| futarisIRCcloud | xobs: Using latest git for everything: | 01:37 |
| futarisIRCcloud | ERROR: Cell 'SB_IO_11' cannot be bound to bel 'X19/Y0/io1' since it is already bound to cell 'SB_IO_6' | 01:37 |
| futarisIRCcloud | ERROR: Placing design failed. | 01:37 |
| futarisIRCcloud | --revision hacker | 01:38 |
| xobs | futarisIRCcloud: add --placer heap | 01:39 |
| futarisIRCcloud | commit 29640c5a9237ab689befa6c354c5e159e8ae9826 / im-tomu/foboot/hw$ python3 foboot-bitstream.py --revision hacker --placer heap | 01:42 |
| futarisIRCcloud | gives the same error message | 01:42 |
| futarisIRCcloud | tag v1.1 works. | 01:44 |
| xobs | Oh, I must've messed up the touch pads then. | 02:09 |
| xobs | Yeah, that's what I did. Oops. I reused "F2" as the "WP" line. Oops. | 02:10 |
| xobs | Try that? (I'm rebuilding it too) | 02:12 |
| futarisIRCcloud | Ok. Building now. | 02:15 |
| futarisIRCcloud | Built ok. | 02:19 |
| xobs | Your machine is much faster than mine. Still routing. | 02:20 |
| futarisIRCcloud | Quad core i5-7300HQ. | 02:23 |
| pollo | Hey folks! I've got a hacker fomu board but no SPI programmer and I was wondering if people here could recommend something | 02:42 |
| pollo | I'm not sure I want an RPI (I seems a simple USB one would be simpler and cheaper) | 02:48 |
| xobs | pollo: I'm not sure what options there are for bit banging gpios on a desktop. I gather ftdi chips allow for that, but drivers are an issue then. | 02:50 |
| xobs | I went with a pi because it meant not having to deal with drivers or differing platforms. | 02:51 |
| pollo | I really have no experience in that domain so if you say the RPI is the way to go, I'll happily go that way :D | 02:51 |
| pollo | Is there an RPI version I should be targeting? | 02:52 |
| xobs | This is an evolving situation. futarisIRCcloud is just testing the bootloader on a Hacker board now. | 02:53 |
| xobs | I've been trying to build a new rpi image, but my local Raspbian mirror is missing a random assortment of packages. I think they're updating things. | 02:54 |
| futarisIRCcloud | I just finished flashing v1.2.7 Fomu-Dev onto my SD card. Let me see if I can get giomasce 's poor man's programmer to work. | 02:58 |
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| ewen | xobs: futarisIRCcloud: in case it helps (re yosys / nextpnr / ...), mithro's litex-buildenv conda repo has pre-built versions of (most of) those, which could be installed via litex-buildenv or possibly more directly via conda. | 03:30 |
| futarisIRCcloud | Cheers. | 03:30 |
| futarisIRCcloud | Now I just need to get the pinouts right for the Raspberry Pi (1) B ... | 03:31 |
| ewen | I'm using the Raspberry Pi image (1.2.8 + htpdate package update) for dev testing, on a recent Raspberry Pi 3B+, and it's fine for smaller examples; I've not tried foboot yet. | 03:31 |
| ewen | (I've also not got hacker Fomus, just EVT2 and EVT3, which are Pi shields anyway.) | 03:31 |
| xobs | ewen: speaking of which, it looks like the packages finally succeeded in downloading, so 1.2.9 should be done soon. | 03:32 |
| xobs | (In an hour or two) | 03:32 |
| ewen | xobs: Yay! | 03:33 |
| ewen | futarisIRCcloud: https://anaconda.org/TimVideos/repo is the repo. Seemsto have recently rebuilt yosys, nextpnr, and icestorm (for x86-64). | 03:33 |
| ewen | futarisIRCcloud: Amongst other things they're used for TinyFPGA BX and other iCE40 based boards. | 03:33 |
| ewen | (I suspect they might not have the heap placer enabled though, which xob's Raspberry Pi build of nextpnr does have enabled; I've successfully used the nextpnr heap placer for small EVT tests.) | 03:34 |
| mithro | ewen: recent versions of cobra seem to support RPi architectures | 03:34 |
| mithro | I may not have enabled the heap placer? | 03:35 |
| ewen | mithro: AFAICT from https://github.com/timvideos/conda-hdmi2usb-packages/commits/master the only updates since my work in Feb was and iverlog build recipe fix. heap placer didn't get added until March-ish from memory. | 03:36 |
| tpb | Title: Commits · timvideos/conda-hdmi2usb-packages · GitHub (at github.com) | 03:36 |
| ewen | mithro: re "recent versions of cobra", what is "cobra" in that context? | 03:38 |
| mithro | My phone autocorrecting conda | 03:39 |
| ewen | mithro: I wondered if that was it :-) | 03:40 |
| ewen | mithro: Raspberry Pi support in conda could be useful, especially for fomu users. | 03:40 |
| mithro | There is also https://github.com/SymbiFlow/conda-packages | 03:41 |
| tpb | Title: GitHub - SymbiFlow/conda-packages: Conda build recipes for the toolchains needed by LiteX / MiSoC firmware (at github.com) | 03:41 |
| xobs | mithro: you have pogo pins for the portable jig, right? | 03:42 |
| ewen | FTR, looks like nextpnr HeAP placer was added 2019-02-26: https://github.com/YosysHQ/nextpnr/commit/7142db28a8b828da557729a706c20c8f330ba129 | 03:50 |
| tpb | Title: HeAP: Make HeAP placer optional · YosysHQ/nextpnr@7142db2 · GitHub (at github.com) | 03:50 |
| ewen | Looks like recent nextpnr defaults to building HeAP if it's not turned off (https://github.com/timvideos/nextpnr/blob/5344bc3b65f4e06f983db781e9a82d30b3f1512b/CMakeLists.txt#L8) and we don't turn it off (https://github.com/timvideos/conda-hdmi2usb-packages/blob/7bb4638f9c356d2409c29fb7ef0c53ad4b630a3a/nextpnr/build.sh#L10), so the recent pull of nextpnr and recent conda rebuild might actually have picked it up. | 03:54 |
| tpb | Title: nextpnr/CMakeLists.txt at 5344bc3b65f4e06f983db781e9a82d30b3f1512b · timvideos/nextpnr · GitHub (at github.com) | 03:54 |
| mithro | xobs: Yes | 03:55 |
| futarisIRCcloud | https://usercontent.irccloud-cdn.com/file/xNWeYBks/20190422_141106.jpg | 04:19 |
| ewen | futarisIRCcloud: That's a pretty elegant "fake programming jig" :-) | 04:20 |
| futarisIRCcloud | https://usercontent.irccloud-cdn.com/file/BsMGXnkf/Screenshot%20from%202019-04-22%2014-12-49.png | 04:21 |
| futarisIRCcloud | And it detects! | 04:21 |
| futarisIRCcloud | xobs / ewen: Can someone confirm that I should just need to run 'fomu-flash -w build/gateware/top-multiboot.bin' and then 'fomu-flash -r' to get the hacker board working? | 04:29 |
| xobs | futarisIRCcloud: that should be it, yes. | 04:30 |
| xobs | You can verify the SPI flash, too. | 04:30 |
| xobs | "fomu-flash -v build/gateware/top-multiboot" just to make sure it wrote. | 04:30 |
| futarisIRCcloud | https://usercontent.irccloud-cdn.com/file/bOmO4YfQ/Screenshot%20from%202019-04-22%2014-23-48.png | 04:32 |
| futarisIRCcloud | Looks like it worked. LED is blinking | 04:32 |
| ewen | xobs: Do you remember if EVT clock is 48Mhz? And also if the uart_tx/uart_rx are wired to Raspberry Pi /dev/ttyS0 serial port lines? | 04:32 |
| xobs | ewen: yes to both | 04:32 |
| xobs | I disabled the UART because it ended up getting pretty large, and the DVT/hacker boards have no UART. | 04:32 |
| ewen | xobs: Cool, thanks. I'm guessing I might need to cross tx/rx to get this test example to build. | 04:33 |
| xobs | But you might be able to build with "--debug=uart". I dunno if it'll fit. | 04:33 |
| ewen | xobs: (This is with a zipcpu tutorial example I'm trying to test out: https://zipcpu.com/tutorial/lsn-05-serialtx.pdf and https://zipcpu.com/tutorial/ex-05-hello.tgz, which has no CPU, etc, so it's tiny: just state machine outputting serial at 115k2) | 04:33 |
| xobs | Oh cool! Then yeah, that should work. | 04:34 |
| xobs | The rpi serial port is actually /dev/ttyAMA0 | 04:34 |
| xobs | The file /dev/ttyS0 is something else. | 04:34 |
| futarisIRCcloud | Now, I should swap the pins to another board and test that this one enumerates. | 04:34 |
| ewen | xobs: Ah, that'd explain why I'm not seeing output. Thanks, I'll try /dev/ttyAMA0. | 04:35 |
| ewen | xobs: Success, it's telling me "Hello World!" once a second (with RX/TX crossed as I'd guessed). | 04:36 |
| ewen | For anyone playing along at home, https://www.raspberrypi.org/documentation/configuration/uart.md explains there are *two* UARTs on the Raspberry Pi; /dev/ttyS0 is the "mini UART", and /dev/ttyAMA0 is the "PL011", typically. Looks like /dev/serial0 is a more reliable name for "the primary UART" though, as it appears which is the primary UART varies by Raspberry Pi board. | 04:39 |
| futarisIRCcloud | And now I have two fomu hacker boards flashed... | 04:43 |
| ewen | futarisIRCcloud: Woot! | 04:43 |
| futarisIRCcloud | https://usercontent.irccloud-cdn.com/file/yqeL5umw/Screenshot%20from%202019-04-22%2014-38-44.png | 04:46 |
| xobs | Hooray! | 04:47 |
| xobs | I should tag a new release. | 04:47 |
| futarisIRCcloud | xobs: 722aee3 enumerates | 04:47 |
| xobs | I think the gateware is mostly settled. I'm just working on the software now. | 04:47 |
| xobs | Eventually I'd like to open up a 512-byte chunk of BRAM to allow passing information to the bootloader, but aside from that the gateware is "done". | 04:48 |
| futarisIRCcloud | We can always reflash the bootloader from the app, if we need to. Are you locking the bootloader yet? | 04:49 |
| xobs | I'm not locking the flash yet, no. | 04:49 |
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| futarisIRCcloud | https://usercontent.irccloud-cdn.com/file/WCPFXzrv/20190422_145628.jpg | 05:04 |
| xobs | futarisIRCcloud: wow! such program. | 05:06 |
| xobs | Me: "I wonder why this DFU modification isn't writing properly?" | 05:06 |
| xobs | Also me: "Oh, let me just hook up the debugger." | 05:06 |
| futarisIRCcloud | Debugging the USB over USB. :) | 05:07 |
| xobs | Well, it works! | 05:08 |
| xobs | Though I find myself asking now if I can speed it up at all. Is that a bad sign? | 05:08 |
| futarisIRCcloud | How fast can we toggle the IOs on the connector? | 05:15 |
| ewen | xobs: "faster" is probably a software/firmware 2.x feature. ("reliable" is probably the most useful 1.0 feature. Just Saying.) | 05:16 |
| xobs | ewen: agreed on that. | 05:16 |
| xobs | futarisIRCcloud: if it's coming from a clock buffer, the datasheet seems to indicate the maximum frequency is 417 MHz (2.4 ns) | 05:19 |
| * xobs uploaded an image: image.png (128KB) < https://matrix.org/_matrix/media/v1/download/matrix.org/FoUCDlZuOtoUaAMpDoNXiIJx > | 05:20 | |
| futarisIRCcloud | So, it depends on the speed of the logic... | 05:21 |
| futarisIRCcloud | I guess monochrome DVI would be possible, or 8 color VGA. | 05:21 |
| xobs | I thought someone got HDMI working on Glasgow, or something similar. | 05:24 |
| tnt | you only have 4 IOs that's a bit short ... | 05:26 |
| tnt | Using an external hdmi encoder I got 1080p60 output on the icebreaker, but I'm using 8 IOs. | 05:28 |
| futarisIRCcloud | https://github.com/smunaut/ice40-playground/commit/8d856f44939bc07bcd1791c2174861227687f15f ? | 05:34 |
| tpb | Title: projects/hdmi_text: Import demo code for the HDMI text on the iCEBreaker · smunaut/ice40-playground@8d856f4 · GitHub (at github.com) | 05:34 |
| tnt | futarisIRCcloud: yes | 05:42 |
| futarisIRCcloud | We should be able to run zephyr in 128kb of RAM... It'll run in 8kb apparently. | 05:56 |
| xobs | I've thought about adding a feature to let you use dfu-util to upload a riscv program into ram. That'd make os development easier, I think. | 05:58 |
| futarisIRCcloud | I should probably just add qemu riscv support to litex-buildenv ... | 06:00 |
| futarisIRCcloud | I guess if the gateware for the valentyusb is finalised, we can add a qemu model for the USB device easily enough. | 06:00 |
| xobs | Alright, I added a shortcut. If your binary contains the magic number "0x17ab0f23" within the first 64 bytes, then the program is loaded to the offset immediately following that number, instead of getting written to flash. | 06:55 |
| xobs | That should make the development cycle much shorter. | 06:56 |
| xobs | (Assuming your program fits in 124 kilobytes) | 06:56 |
| futarisIRCcloud | https://github.com/im-tomu/fomu-pi-gen/releases/tag/v1.2.9-fomu | 08:45 |
| futarisIRCcloud | https://youtu.be/-kpnTM_b4u8?t=139 | 08:45 |
| tpb | Title: Release Its About Time · im-tomu/fomu-pi-gen · GitHub (at github.com) | 08:45 |
| xobs | Now I understand how Linux gets codenames like "Pink Farting Weasel" and "Displaced Humerous Anterior" | 08:48 |
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| mithro | Morning! | 14:50 |
| xobs | Good morning! | 14:51 |
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