6 May 2024 |
Artur Scholz | Is it really just now that I realize that beagleboard is a better alternative to Raspi, as it is completely open source!?! ... ordering one right now... | 12:10:43 |
Red | haha it is never too late 😄 | 12:22:17 |
cajt | Well wel, if it should be open why not risc-v on a fpga with an open toolchain? | 15:52:43 |
Artur Scholz | In reply to @cajt:matrix.org Well wel, if it should be open why not risc-v on a fpga with an open toolchain? you mean, like this one: https://www.beagleboard.org/boards/beaglev-fire ? 😃 | 15:57:36 |
cajt | Uhhhh | 15:58:14 |
cajt | Ohh, that is moderately cheap and available | 15:58:56 |
cajt | Was thinking more along the lines of Lattice SOI FPGA, some RAM and some SoC from the migen/liteX domain | 16:01:51 |
cajt | Artur Scholz: is that the one you ordered? | 16:24:31 |
cajt | But no built-in JTAG adapter, well maybe it's not needed | 17:48:24 |
cajt | and the schematics and PCB design files are some propretairy CAD | 17:54:02 |
7 May 2024 |
cajt | One might redesign it in a libre CAD, and smash two into that pseudo PC104 format. Add some voting for primitive IOs and message level network access, would be a nice product. Could be uncritical cheap one of two, or a two of two configuration for a bit more reliability. B5F could remain the development plattform. | 10:45:37 |
cajt | Not completely sure about the LPDDR4 routing, but I wouldn't be too surprised if someone pulls off a 6-layer PCB despite its presence. | 10:47:23 |
9 May 2024 |
Artur Scholz | @room Anyone interested in getting hands dirty with PCB design (using KiCAD)? Here is the task: Add support for dual CAN bus to the raspi proto board. Find more details here: https://66222-44717.pph-server.de/projects/developments/work_packages/103/activity | 19:58:44 |
cajt | that is adding two mcp2515 or mcp2518, and connect it to the rpi? | 20:28:55 |
Artur Scholz | Yes, the mcp2518. Like here: https://files.seeedstudio.com/wiki/CAN-BUS-FD/CAN-BUS(FD)-HAT-for-Raspberry-Pi_MCP2518FD_SCH.pdf | 20:35:30 |
Artur Scholz | Remember, this started out from here (https://fosstodon.org/@librecube/110504810282379569) where we wanted to mount a pyboard on a LibreCube template board for easy prototyping. Now we have such board for Raspi (dual CAN to be added), and yet another project is to create one for beaglebone: https://66222-44717.pph-server.de/projects/developments/work_packages/104/activity | 20:45:23 |
cajt | ohh, an old BBB? that is rather slow by todays standards of popular embedded linux boards | 20:47:14 |
Artur Scholz | Good enough for our purposes. | 20:52:55 |
cajt | no debian, git client and test frame work on-board? | 20:54:13 |
cajt | * no debian, git client and test framework on-board? | 20:54:25 |
cajt | theoretically it can build stuff, but most likely its a target for corss-compilation now | 20:57:20 |
cajt | But its a vanila kernel iirc, so its not a terrible place to be. just cross-development with some linux | 21:05:52 |
Artur Scholz | I just bought one, still need to try it out. But when you say no git, maybe you refer to an old version? Have a look here: https://docs.beagleboard.org/latest/books/beaglebone-cookbook/01basics/basics.html | 21:12:37 |
cajt | you can run a small debian on it, but building something big will be slow, you can do GIT on it, but it will be tiresome. Very likely the memory or filesystem throughput or capacity will become a problem. | 21:15:04 |
cajt | It is different from what many are used to from using RPIs | 21:16:37 |
cajt | Is that PCB two layers for a firm reason? | 22:54:53 |
10 May 2024 |
| Sahave changed their display name from Stephan Havermans to Sahave. | 10:35:45 |
| umeii changed their display name from umei (Old) to umeii. | 16:57:45 |
13 May 2024 |
cajt | Maybe a nice payload, reasonable scientific output and still affordable to play around with: https://hackaday.io/project/194457-pomelo-gamma-spectroscopy-module | 11:10:07 |
cajt | Download image.png | 11:12:43 |