Lundin‭

I keep hearing that dynamic memory allocation on the so-called "heap" segment should not be used in microcontroller-based embedded systems. Pretty much every safety standard like for example MISRA ...

posted 4y ago by Lundin‭  ·  edited 2y ago by Lundin‭

Using pointer types In C, an object pointer such as uint8_t* ptr is the equivalent concept to use for hardware addresses. A compiler makes this pointer type large enough to contain all addresses i...

posted 5y ago by Lundin‭  ·  edited 12mo ago by Lundin‭

This question here about the OSI model was closed as off-topic. How should we treat questions about data communication? What is definitely on-topic here: Embedded systems programming, including...

3 answers  ·  posted 4y ago by Lundin‭  ·  last activity 4y ago by Olin Lathrop‭

When writing firmware in C for a microcontroller, how can I directly access a memory location such as a hardware peripheral register, given its absolute address? Is there a way to do this safely an...

1 answer  ·  posted 5y ago by Lundin‭  ·  last activity 12mo ago by Lundin‭

One rule of thumb is that a CAN network should never have any error frames when it is up and running. It is expected to have some when all nodes are "waking up", or if you hot plug something to the...

posted 5y ago by Lundin‭  ·  edited 5y ago by Lundin‭

RF novice here. If using a superheterodyne receiver for the purpose of FM/FSK modulated signals, I'm wondering if the location of an optional automatic gain control (AGC) circuit is always placed o...

0 answers  ·  posted 4y ago by Lundin‭

As we know there exists numerous different kinds of PCB CAD software. The big ones seem to be Eagle, KiCAD, Altium, OrCAD, Solidworks, DesignSpark and probably a few more. When it comes to mechani...

1 answer  ·  posted 4y ago by Lundin‭  ·  last activity 4y ago by Olin Lathrop‭

Based on this nerdy but seemingly trustworthy site: https://www.prc68.com/I/TelephonePoles.shtml Then I would guess these are cable TV repeaters/signal amplifiers. Classic cable TV uses copper co...

posted 3y ago by Lundin‭

After reading various low quality questions Someplace Else today, it (once again) occurred to me that a whole lot of people, mostly hobbyists and engineering students, have no clue how to do the mo...

4 answers  ·  posted 4y ago by Lundin‭  ·  last activity 2y ago by Lorenzo Donati‭

I can't get my CAN bus application (ISO 11898-2, classic "high speed CAN") working and I'm receiving various CAN error frames. These error frames manifest themselves as sequences of 6 bits with my ...

1 answer  ·  posted 5y ago by Lundin‭  ·  last activity 5y ago by Lundin‭

My scenario is this: radio equipment controlling an overhead crane inside a steel mill. Specifically it is used for transporting melting pots. With the current, unfortunate installation, the antenn...

2 answers  ·  posted 3y ago by Lundin‭  ·  last activity 2y ago by Lorenzo Donati‭

Assume I'm a complete beginner at RF. Is there a way to measure return loss of an antenna, in such a manner that I can reliably reproduce the measurement later on? What I'm talking about is produ...

2 answers  ·  posted 4y ago by Lundin‭  ·  last activity 3y ago by TonyStewart‭

Quite often, I find myself knowing the technical term of an electronic component in my native language, but not the proper English term. For example when translating a manual or other technical doc...

3 answers  ·  posted 4y ago by Lundin‭  ·  edited 2y ago by Olin Lathrop‭

Regarding scope of embedded systems/firmware When we released Software Development, I made a push to make all forms of embedded systems programming off-topic and re-direct such to this site. The ...

posted 5y ago by Lundin‭  ·  edited 5y ago by Lundin‭

Which are the parameters I should looking for when picking a flyback diode to be placed across a generic coil, such as a relay? That is: a coil with plain on/off functionality, for example a 24VDC ...

2 answers  ·  posted 5y ago by Lundin‭  ·  edited 2y ago by Lorenzo Donati‭