Deadline Extension: International Joint Conferences Online - Published by Springer LNNS Series (Scopus)

Started by Anu Bajaj in comp.arch.embedded1 day ago

** Please circulate this CFP to your colleagues and networks! Many thanks in advance ** ------------On multiple requests from several...

** Please circulate this CFP to your colleagues and networks! Many thanks in advance ** ------------On multiple requests from several authors, we have extended the submission deadline till October 20, 2022--------------- ** ISDA 2022 - HIS 2022 - SoCPaR 2022 - IBICA 2022 - IAS 2022 - NaBIC 2022 - WICT 2022 ** Publisher: Springer Verlag, LNNS Series Indexe


newlib and time()

Started by pozz in comp.arch.embedded2 days ago 16 replies

I often use newlib standard C libraries with gcc toolchain for Cortex-M platforms. It sometimes happens I need to manage calendar time: seconds...

I often use newlib standard C libraries with gcc toolchain for Cortex-M platforms. It sometimes happens I need to manage calendar time: seconds from 1970 or broken down time. And it sometimes happens I need to manage timezone too, because the time reference comes from NTP (that is UTC). newlib as expected defines a time() function that calls a syscall function _gettimeofday(). It should...


Learn how to design state machines and generate code (Ad)

Started by pmue...@sinelabore.com in comp.arch.embedded5 days ago

You search for an affordable tool to design state diagrams and generate code from them? The SinelaboreRT focus is on generation of readable and...

You search for an affordable tool to design state diagrams and generate code from them? The SinelaboreRT focus is on generation of readable and maintainable code from hierarchical UML state machine diagrams - and activity diagrams. With its unique features the tool covers perfectly the requirements of embedded real-time and low-power application developers coding in C / C++. No comp


Useful bonus feature

Started by Andrew Smallshaw in comp.arch.embedded5 days ago 3 replies

I'm just doing some rough prototyping at the minute and to save squinting I put a identifying label on the MCU showing part no and orientation,...

I'm just doing some rough prototyping at the minute and to save squinting I put a identifying label on the MCU showing part no and orientation, from one of those thermal Dymo-style labelling machines. What I hadn't anticipated is the bonus feature - these are thermal labels so of course give a visual indication when the magic smoke gets let out. http://andrews.freeshell.org/news/20220821.c...


Override libc functions

Started by pozz in comp.arch.embedded5 days ago 7 replies

Many times I'd like to replace libc functions in embedded systems, because of some tests or because I need a different implementation. For...

Many times I'd like to replace libc functions in embedded systems, because of some tests or because I need a different implementation. For example, sprintf implementation of newlib uses malloc and I can't use it many times. It sometimes happens that I can use malloc, with some restrictions. Just for test or optimization, I replace libc malloc with my own implementation. In these cas...


IAR ARM Cortex-M compiler does not align stack on 8-byte boundary

Started by StateMachineCOM in comp.arch.embedded2 weeks ago 6 replies

ARM ABI says that the stack should be 8-byte aligned, but I see cases where the stack is aligned only to 4-byte boundary. For example, I have...

ARM ABI says that the stack should be 8-byte aligned, but I see cases where the stack is aligned only to 4-byte boundary. For example, I have the following simple busy-delay function: void delay(int iter) { int volatile counter = 0; while (counter < iter) { // delay loop ++counter; } } This compiles with IAR EWARM 9.10.2 on ARM Cortex-M to the following


Why use non-free compilers (Keil, etc) for architectures supported by SDCC?

Started by Philipp Klaus Krause in comp.arch.embedded4 weeks ago 26 replies

I wonder why some developers choose non-free compilers (Keil, IAR, Cosmic, Raisonance, etc) when targeting architectures supported by the free...

I wonder why some developers choose non-free compilers (Keil, IAR, Cosmic, Raisonance, etc) when targeting architectures supported by the free Small Device C Compiler (SDCC). Answears that also mention the architecture besides the reasons would be particularly helpful.


Software "Interconnect" complexity

Started by Don Y in comp.arch.embedded1 month ago

In a given, nominal task (collection of related threads), how many "external interfaces" (hooks to/from other tasks) do you...

In a given, nominal task (collection of related threads), how many "external interfaces" (hooks to/from other tasks) do you typically have? Complexity is best managed when the number of such interactions is kept small and focused. But, what is a good target metric for this? [Clearly, each task needs to interact with at least one other task/driver to do meaningful work. But, at what poi...


Help with a HardFault on Cortex-M3

Started by pozz in comp.arch.embedded1 month ago

I'm stuck with a stupid issue on a Cortex-M3 (LPC1788 by NXP). It's a classical issue that happens randomly and in different ways when the...

I'm stuck with a stupid issue on a Cortex-M3 (LPC1788 by NXP). It's a classical issue that happens randomly and in different ways when the code is slightly changed, so it's very difficult to debug. MCUXpresso (IDE from NXP) and Ozone (a software from Segger) says that IBUSERR and FORCED are set when HardFault exception occurs. I understand it is related to a program counter with a wron...


Wide frequency range, arbitrary waveform DDS

Started by Stef in comp.arch.embedded2 months ago 3 replies

To generate frequencies from approximately 0.5 mHz to 12 MHz with a DDS a minimum clock of > 24, say 25 MHz, is required. To be able to go...

To generate frequencies from approximately 0.5 mHz to 12 MHz with a DDS a minimum clock of > 24, say 25 MHz, is required. To be able to go down to 0.5 mHz, a phase accumulator of at least 36 bits is required. This will give sub mHz resolution over the entire range. Nice for the low frequencies, but not of much use for MHz frequencies (in this application). Is there any objection to using a


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