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Embedded, open-source, and open-hardware enthusiast interested in passing knowledge to next generation. OpenHub https://openhub.net/accounts/ppisa/positions . For our computer architectures education see https://comparch.edu.cvut.cz/ .
ppisa

Pavel Pisa

Reply to @jarkko
@jarkko I am not sure if next use of image files from host system could be robust (for example in respect to aligning image according to used virtual device sector sizes etc.). But for basic use I would use fdisk, gdisk, parted, ... for partitioning. mkfs.ext2, mkfs.vfat have offset option to setup filesystem at right location and fs-size or block_count argument to not span it to the end of image. BTRFS seems to be without these options, for example. Then there is option to format individual partitions images and concatenate them together. When feed trough dd conv=notrunc,sparse,nocreat even sparse image can be obtained. I have put my idea into google and got to link https://unix.stackexchange.com/questions/281589/how-to-run-mkfs-on-file-image-partitions-without-mounting . Problem is creation of the FS content in some cases. If it is possible to have root read only or with overlay then genromfs or sqush can be used to prepare partition content even with files...
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Pavel Pisa

Edited 1 year ago
#qtrvsim educational simulator compiled and running on real #riscv. #visionfive2 provided from RISCV.org developer boards program just arrived today so native build and run of https://github.com/cvut/qtrvsim was tempting.
Simulator can be used with internal assembler or can run simple RV32IM and RV64IM static ELF binaries including even 7 Linux kernel system calls. Packages are provided for x86 and ARM GNU/Linux, Windows, Mac and browser version is available too https://comparch.edu.cvut.cz/ but running it on architecture which it supports and is used for teaching is pleasant step forward.
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Pavel Pisa

Reply to @palmer
Page with presentation and recording pointers https://fosdem.org/2023/schedule/event/rv_qtrvsim/
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Pavel Pisa

Edited 1 year ago
The recording of our 30 years in #CANBUS support presented at #devconf_cz is available
https://youtu.be/RwmQYjfzQAg
related open source drivers, kernel support, designs, latency testing etc.. at https://canbus.pages.fel.cvut.cz/
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palmer

Palmer Dabbelt

QtRvSim talk at FOSDEM
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ppisa

Pavel Pisa

In person meeting/discussion about computer architectures teaching at Brno DevConf https://sched.co/1MYo9 . We bring our QtRvSim and QtMip simulators and teaching materials to share, exchange with others comparch.edu.cvut.cz/ and are curious to see, learn what others use.
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Pavel Pisa

Edited 1 year ago
CAN Bus in Control, Automotive and Satellitelites at Brno DevConf https://sched.co/1MYjG more. Daily kernel build latency testing at https://canbus.pages.fel.cvut.cz/can-latester/ more about used CTU CAN FD #CANBUS controller and other projects at https://canbus.pages.fel.cvut.cz/
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