64-bit embedded computing is here and now

Started by James Brakefield in comp.arch.embedded2 days ago 58 replies

Sometimes things move faster than expected. As someone with an embedded background this caught me by surprise: Tera-Byte microSD cards are...

Sometimes things move faster than expected. As someone with an embedded background this caught me by surprise: Tera-Byte microSD cards are readily available and getting cheaper. Heck, you can carry ten of them in a credit card pouch. Likely to move to the same price range as hard disks ($20/TB). That means that a 2+ square inch PCB can hold a 64-bit processor and enough storage for memo...


(Semi-) formal methods

Started by Don Y in comp.arch.embedded2 weeks ago 26 replies

How prevalent are (semi-) formal design methods employed? Which? [I don't have first-hand knowledge of *anyone* using them]

How prevalent are (semi-) formal design methods employed? Which? [I don't have first-hand knowledge of *anyone* using them]


more on arm asm.

Started by Hul Tytus in comp.arch.embedded2 weeks ago

Jonathon - I'm in the testing phase now but, thankfully, strictly 32 bit code. One trick I've found that's been helpful is "fasmarm", which...

Jonathon - I'm in the testing phase now but, thankfully, strictly 32 bit code. One trick I've found that's been helpful is "fasmarm", which is an offshoot of a 386 et.al. assembler. The name is, if memory serves, flat assembler or fasm. I've got it on a Microsoft xp msdos directory. The fasmarm handles the 64 bit codes which might make it useful for you. Hul Jonathan Harston


Press Release - AEiC 2021, Ada-Europe Reliable Softw. Technol.

Started by Dirk Craeynest in comp.arch.embedded2 weeks ago

----------------------------------------------------------------------- FINAL Call for Participation ...

----------------------------------------------------------------------- FINAL Call for Participation *** UPDATED Program Summary *** 25th Ada-Europe International Conference on Reliable Software Technologies (AEiC 2021) 7-10 June 2021, Virtual Event www.ada-europe.org/conf...


Embedded linux serial port

Started by pozz in comp.arch.embedded3 weeks ago 2 replies

I used a simple driver for serial port in Linux with success in many projects, but recently I found an issue with it. The scenario is an...

I used a simple driver for serial port in Linux with success in many projects, but recently I found an issue with it. The scenario is an embedded Linux (running on iMX6) that runs a QT application (that creates a GUI on a touch display) and a C application that communicates over a serial port. When QT application starts some complex graphics (I see its CPU load reaching 70-80%), the ...


Array of bits

Started by pozz in comp.arch.embedded3 weeks ago 10 replies

Many times I need to pass to functions or serialize an array of bits. If they are just a few (8-16 bits), I decide to use a standard...

Many times I need to pass to functions or serialize an array of bits. If they are just a few (8-16 bits), I decide to use a standard array: uint8_t my_short_array_of_bits[16]; void abits_set_bit(uint8_t *array, size_t size, uint8_t nbit); uint8_t abits_get_bit(uint8_t *arrray, size_t size, uint8_t nbit); It sometimes occurs that the number of bits is much greater, maybe 100 or 200. If ...


Udev-based serial number dependent symlinks for PCIe UIO devices

Started by Wojciech Zabolotny in comp.arch.embedded4 weeks ago 4 replies

I'm working at a system, where a server manages multiple PCIe data acquisition cards. Each card has its individual serial number available in the...

I'm working at a system, where a server manages multiple PCIe data acquisition cards. Each card has its individual serial number available in the extended PCIe configuration space. The cards are controlled as UIO devices. Unfortunately, it appears that the card are sometimes enumerated in the random order. Proper management of the system requires that there are symlinks created with names permane...


Pipeline hack

Started by Don Y in comp.arch.embedded1 month ago 1 reply

Wanna bet the folks who designed the kit "bolted on" the security after-the-fact (as opposed to designing it in from the start)?

Wanna bet the folks who designed the kit "bolted on" the security after-the-fact (as opposed to designing it in from the start)?


Can ST Cube IDE do 32F4 execution time profiling?

Started by John-Smith in comp.arch.embedded1 month ago

The internet is full of posts from people tearing their hair out trying to use this tool :) I have it running OK although 99% of it is a...

The internet is full of posts from people tearing their hair out trying to use this tool :) I have it running OK although 99% of it is a mystery. And the code which the configurator generates is crap ;) With the old ICEs one could do a bar graph easily, across the address range, and then you could zoom in. Obviously there is no identical way to do this because the 32F runs code fully ...


Linux embedded and direction control of RS485 transceiver

Started by pozz in comp.arch.embedded1 month ago 21 replies

I have an half-duplex RS485 bus with 10-20 different nodes. Some of them are 8-bit MCU based, one of them could be Linux embedded. It's...

I have an half-duplex RS485 bus with 10-20 different nodes. Some of them are 8-bit MCU based, one of them could be Linux embedded. It's half-duplex, so it's important for the transmitter node to disable the driver as soon as the last transmitted bit is shifted out. Many small low-cost MCU has interrupt on transmission complete, so the delay of disabling the driver is usually on the ord...


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