Activity for Lundinâ€
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Comment | Post #276570 |
I think we should probably rather be looking for a FAQ system where we can post a list of canonical posts, similar to the example I gave from SO's C FAQ: https://stackoverflow.com/tags/c/info. -> (more) |
— | almost 4 years ago |
| Comment | Post #276570 |
"Are you saying we shouldn't try because it is doomed to fail, or that we should proceed but keep in mind the issues you raised?" I'm saying that this will need very stringent rules for everything, or otherwise it is probably doomed to fail. The "Documentation project" had lots of code/dev support, s... (more) |
— | almost 4 years ago |
| Comment | Post #276602 |
Actually I addressed this issue back in December https://forum.codidact.org/t/allowing-specific-tag-topic-meta-discussions/432. Nothing came out from that discussion... except it does seem like we can use Q&A tags here on meta too, so it may be possible to set up a link collection that way too. (more) |
— | almost 4 years ago |
| Comment | Post #276602 |
@manassehkatz Yeah so what we need is a working FAQ system, which was also the problem SO had since day 1. We could however use tag wiki for now, to maintain a list to high-quality canonical posts. Take for example the C programming FAQ I was pushing for over at SO: https://stackoverflow.com/tags/c/i... (more) |
— | almost 4 years ago |
| Comment | Post #276317 |
This is quite opinion-based. Basically, you may benefit from a RTOS if you have numerous different, complex processes that happen simultaneously. We are talking mid- to high end microcontrollers where you are well beyond 50kb program space and probably beyond 100k LoC. Or when you find yourself const... (more) |
— | almost 4 years ago |
| Comment | Post #276294 |
@Olin Sure it can, the linkage & storage duration doesn't really matter. It's highly tool chain-specific what gets optimized away and what gets linked, it's nothing we can rely on cross-platform. Also note that it is very common for bare metal microcontroller programs to use a non-standard start-up, ... (more) |
— | almost 4 years ago |
| Comment | Post #276378 |
You really should draw these from left to right. That is left=input voltage, right=output voltage. As done in every existing datasheet for switch regulators out there. (more) |
— | almost 4 years ago |
| Comment | Post #276294 |
@Olin Then you would still have the possibility that the compiler may assume "Oh, that `UARTBR=0x42;` line is there, but the variable isn't used anywhere. Lets optimize away that line." I wouldn't gamble but keep volatile consistent across all registers. (more) |
— | almost 4 years ago |
| Comment | Post #276154 |
Yet another trick: poke the manufacturer's tech support early on, to see if they are useful or if they hate to have customers. Similarly, can you get samples for the part or is that mission impossible unless you buy MOQ 10k? (more) |
— | almost 4 years ago |
| Comment | Post #276154 |
Another important thing to consider: part status. Does the manufacturer list this as highly recommended or active? If not, stay clear of it. If you are considered an important-enough customer, you can also poke a large distributor (Arrow, Avnet etc) and ask them if this part is a "high runner" or if ... (more) |
— | almost 4 years ago |
| Comment | Post #276253 |
There's also an option 3), which is to hack together your own bootloader over SPI, UART, CAN etc. Many modern MCUs come with some manner of hardware support for writing bootloaders, meaning that you can do it even if the chip wasn't previously flashed. Though these are only for specialized needs, usu... (more) |
— | almost 4 years ago |
| Comment | Post #276249 |
Regarding programming interfaces, each MCU family tends to have their own standard for connectors and signals. The most common ones nowadays for ARM, PowerPC and similar mainstream 32 bitters is JTAG and the spin-off called SWD. JTAG typically uses a plain 2,54mm/0.1in header, 2x10 or 2x7. SWD typica... (more) |
— | almost 4 years ago |
| Comment | Post #276235 |
What about electric-power-infrastructure? Bit long but unambiguous. Alternatively something along the lines of power-grid? Input from someone working in that field would be interesting. (more) |
— | almost 4 years ago |
| Comment | Post #276138 |
Almost all LEDs are specified @ 20mA nominal and you shouldn't give them more than that unless the datasheet says otherwise. As for forward voltage, it depends on if the white LED is a "blue LED in disguise" or a "yellow LED in disguise" - that is, based on different chemistries. "Blue:ish" white LED... (more) |
— | almost 4 years ago |
| Comment | Post #276142 |
"Maybe there was a reason to make sure Q1 was really off and not picking up stray signals when the micro is powering up and the I/O pin is still in high impedance before the firmware sets it up." Indeed. Many MCUs set all their GPIO as inputs out of reset, to save power. From the time where the MCU g... (more) |
— | almost 4 years ago |
| Comment | Post #276146 |
Things like component identification or repair questions are probably not suitable categories, we should rather just make rules for how they should be asked, as I've now noticed was already done here: https://electrical.codidact.com/help/compid. (more) |
— | almost 4 years ago |
| Comment | Post #276155 |
Java isn't JavaScript :) (more) |
— | almost 4 years ago |