Is it common for microcontrollers to lack comprehensive documentation, or is it just espressif?
Can’t speak for others, but AVRs usually have excellent documentation IMO. I’ve even seen code snippets for peripherals.
Readit Newspublicmail commented on Setting serial baud rate on ESP-IDF does nothing atomic14.substack.com/p/t... · Posted by u/iamflimflam1
publicmail commented on Rocky Linux 10 Will Support RISC-V rockylinux.org/news/rocky... · Posted by u/fork-bomber
Maybe a dumb question but how do non x86 boards normally boot Linux images in a generic way? When I was in the embedded space, our boards all relied on very specific device tree blobs. Is the same strategy used for these or does it use ACPI or something?
publicmail commented on I won't connect my dishwasher to your cloud jeffgeerling.com/blog/202... · Posted by u/HieronymusBosch
Sidetrack, maybe a silly question: Under what circumstances are you touching your dishwasher with wet fingers? Plates are dry when they go in and dry when they come out if you have a decent dishwasher.
Capacitive buttons suck, but they are no worse in dishwashers than in any other appliance, in my usage at least
I like to rinse the plates off to remove larger food debris prior to putting them into the dishwasher. It’s not always necessary though.
publicmail commented on I won't connect my dishwasher to your cloud jeffgeerling.com/blog/202... · Posted by u/HieronymusBosch
My favorite is my Bosh wall oven that uses 85C rated capacitors with practically no voltage derating for the control board that sits directly at the top of the oven. After 4 years, they gave out causing the display to dim to the point of invisibility.
We’re talking about 50 cents of part savings on a $3000+ appliance here.
Replaced them myself easily, but most people will end up having to call for service and end up replacing the entire board for hundreds of dollars minimum.
Actually no - I forgot about my Bosch dishwasher that uses capacitive touch buttons. Great idea for something that is often touched with wet fingers…
publicmail commented on I won't connect my dishwasher to your cloud jeffgeerling.com/blog/202... · Posted by u/HieronymusBosch
Bosch knows how to perfect asshole design.
On some of their ovens there is a secret key sequence (like game cheat) to get the buttons working again. Every 6 months you need to do this otherwise pay for a service call to do this. Or have a defunct oven.
But it is not public info they have released (but had been leaked on YT)
So they have software with a bug and a workaround they won't tell you about. Ideally they should recall these ovens and pay for a replacement install.
My favorite is my Bosh wall oven that uses 85C rated capacitors with practically no voltage derating for the control board that sits directly at the top of the oven. After 4 years, they gave out causing the display to dim to the point of invisibility.
We’re talking about 50 cents of part savings on a $3000+ appliance here.
Replaced them myself easily, but most people will end up having to call for service and end up replacing the entire board for hundreds of dollars minimum.
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publicmail commented on Remote code execution via MIDI messages psi3.ru/blog/swl01u/... · Posted by u/portasynthinca3
Many industrial applications as well. Mitsubishi used it in the ECU of some of its cars, including the Lancer Evolution.
Early (2003 for sure) 350z had it as well.
Deleted Comment
publicmail commented on Don’t look down on print debugging blog.startifact.com/posts... · Posted by u/todsacerdoti
I have also seen the print statements added for debugging alter the timing with the same effect on more than one occasion, appearing to “fix” the issue.
Yep. That’s actually the first clue that I’m dealing with a race condition/concurrency issue.
publicmail commented on What happened to the Japanese PC platforms? mistys-internet.website/b... · Posted by u/zdw
https://j-core.org/
"What is this processor? The SuperH processor is a Japanese design developed by Hitachi in the late 1990's. As a second generation hybrid RISC design it was easier for compilers to generate good code for than earlier RISC chips, and it recaptured much of the code density of earlier CISC designs by using fixed length 16 bit instructions (with 32 bit register size and address space), using microcoding to allow some instructions to perform multiple clock cycles of work. (Earlier pure risc designs used one instruction per clock cycle even when that served no purpose but to make the code bigger and exhaust the encoding space.)
Hitachi developed 4 generations of SuperH. SH2 made it to the United states in the Sega Saturn game console, and SH4 powered the Sega Dreamcast. They were also widely used in areas outside the US cosumer market, such as the japanese automative industry.
But during the height of SuperH's development, the 1997 asian economic crisis caused Hitachi to tighten its belt, eventually partnering with Mitsubishi to spin off its microprocessor division into a new company called "Renesas". This new company did not inherit the Hitachi engineers who had designed SuperH, and Renesas' own attempts at further development on SuperH didn't even interest enough customers for the result to go ito production. Eventually Renesas moved on to new designs it had developed entirely in-house, and SuperH receded in importance to them... until the patents expired."
The ECU in my 350z also used a SuperH CPU - I think SH2?