I noticed my previous post about preemptive OS involved many people and started many discussions, most of them theoric. Someone wrote the...

I noticed my previous post about preemptive OS involved many people and started many discussions, most of them theoric. Someone wrote the synchronization of tasks in preemptive scheduler is not so difficult, after understanding some things. Others suggested to abandon at all preemptive scheduler, considering its pitfalls. Because I know my limits, I don't think I can produce a well-wri...

I've been looking for a toroid with a cross section area (one side) of probably 2 or 3 square centimeters and an id of about 10 or 12 mm. The...

I've been looking for a toroid with a cross section area (one side) of probably 2 or 3 square centimeters and an id of about 10 or 12 mm. The intended inductor is about 14 micro henries and will handle between 40 to 80 amps in a flyback power supply at, again probably, 100 kc. Fair-Rite, Micrometals, and Magnetics show, at the desired id, cross sections typically less than 1 sqcent. G...

I have to connect ADV7280-M (contained in the EVAL-ADV7280MEBZ board) board to Rock Pi 4B SoC. I have recompiled the kernel with added adv7180.c...

I have to connect ADV7280-M (contained in the EVAL-ADV7280MEBZ board) board to Rock Pi 4B SoC. I have recompiled the kernel with added adv7180.c driver. The procedure for recompilation of the kernel I have taken from: https://wiki.radxa.com/Rockpi4/dev/kernel-4.4 After that I had to add ADV7280-M to the device tree. /dts-v1/; /plugin/; / { model = "RO

I have always worked on non real-time systems, i.e. when the reaction of the system to an event should occur in a reasonable time. For example,...

I have always worked on non real-time systems, i.e. when the reaction of the system to an event should occur in a reasonable time. For example, when the user presses a button, a motor should start rotating. If the motor starts after 100us or 100ms is not so important. I never used RTOS, so the architecture of my firmware is based on "superloop technique" (background tasks running in the...

Is there a control engineering expert here? I could us a bit of help on how to implement a PID autotune function for a heating application (a...

Is there a control engineering expert here? I could us a bit of help on how to implement a PID autotune function for a heating application (a small boiler). My current PID autotune function produces no reliable results. I use the relay feedback method (?strom and H?gglund) but it seems that the ultimate period Tu - one of the paramters determined with the relay feedback test - is directl...

I had been trying to output some sort of address name mapping for debugging. Using the Map file seemed promising initially. But when trying to...

I had been trying to output some sort of address name mapping for debugging. Using the Map file seemed promising initially. But when trying to dump memory locations, it became obvious that I needed the sizes, too. The pure MPASM syntax does not seem to allow annotating that information. gpasm looked superior in that respect. Their .DEF extension specifically. BUT it seems to be moving

----------------------------------------------------------------------- FINAL Call for Contributions ...

----------------------------------------------------------------------- FINAL Call for Contributions 25th Ada-Europe International Conference on Reliable Software Technologies (AEiC 2020) 8-12 June 2020, Santander, Spain www.ada-europe.org/conference2020 *** DEADLINE Tuesday 14 J...

stty -F /dev/ttyUSB0 speed 0 baud; line = 0; min = 1; time = 0; -brkint -icrnl -imaxbel -opost -isig -icanon -iexten -echo (something is...

stty -F /dev/ttyUSB0 speed 0 baud; line = 0; min = 1; time = 0; -brkint -icrnl -imaxbel -opost -isig -icanon -iexten -echo (something is wrong) stty -F /dev/ttyUSB0 ispeed 38400 stty: /dev/ttyUSB0: unable to perform all requested operations But if I give an obv wrong value it doesn't complain. stty -F /dev/ttyUSB0 ispeed 3840 The dongle is a FTDI Chip TTL-232R-5V USB to TTL...

Hi This group has not much traffic Any recommendations for an alternative group? Cheers Klaus

Hi This group has not much traffic Any recommendations for an alternative group? Cheers Klaus

Anyone familiar with a high voltage charge pump designed as a step down power supply? The voltage is between 175 & 200. Numerous high...

Anyone familiar with a high voltage charge pump designed as a step down power supply? The voltage is between 175 & 200. Numerous high voltage versions exist using inductors, (Onsemi has one that is "self supplied" which is attractive) but not a one that works with just a capacitor. Are there any out there I've missed? Hul