Ada-Europe 2017 - end of Mon 22 May = early registration ends

Started by Dirk Craeynest in comp.arch.embedded4 months ago

Come to the Ada-Europe conference mid-June in Vienna, Austria! Reminder: register online before the end of Monday 22 May (CEST) to enjoy early...

Come to the Ada-Europe conference mid-June in Vienna, Austria! Reminder: register online before the end of Monday 22 May (CEST) to enjoy early registration discounts for the conference and substantial discounts for tutorials. Select "Registration" at . Direct link: . Dirk Craeynest, Ada-Europe'2017 Publicity


QF72 story - wow

Started by Clifford Heath in comp.arch.embedded4 months ago 36 replies

This story is a doozy.

This story is a doozy.


The Embedded Muse 329

Started by Reinhardt Behm in comp.arch.embedded4 months ago 5 replies

Just found this in J.Ganssles Embedded Muse: "Without requirements and design, programming is the art of adding bugs to an empty text...

Just found this in J.Ganssles Embedded Muse: "Without requirements and design, programming is the art of adding bugs to an empty text file." - Louis Srygley -- Reinhardt


Serial protocol with physical decoding

Started by Don Y in comp.arch.embedded4 months ago 25 replies

I want to push a bit stream through a series of *identical* devices and have (identical) software running on each determine if that particular...

I want to push a bit stream through a series of *identical* devices and have (identical) software running on each determine if that particular device is being addressed, or not. It seems like the simplest way to do so is to require each device to examine an address field in the packet and, if '0', assume the data that follows is intended for its consumption. If not, decrement the address ...


Ada-Europe 2017 - early registration until May 22

Started by Dirk Craeynest in comp.arch.embedded4 months ago

----------------------------------------------------------------------- 2nd Call for Participation ...

----------------------------------------------------------------------- 2nd Call for Participation *** UPDATED Program Summary *** 22nd International Conference on Reliable Software Technologies - Ada-Europe 2017 12-16 June 2017, Vienna, Austria http://www.ada-europe.org/c...


Play an audio stream with a Cortex-M0+

Started by pozz in comp.arch.embedded5 months ago 3 replies

I need to reproduce a short audio stream with a Cortex-M0+ MCU (it's SAM D21E from Atmel/Microchip). The audio bitstream will be stored in an...

I need to reproduce a short audio stream with a Cortex-M0+ MCU (it's SAM D21E from Atmel/Microchip). The audio bitstream will be stored in an external SPI Flash memory (I need to manage many short audio streams, so the internal Flash memory is not sufficient). SAMD21 features DAC, SPI and DMA. The audio will not be high-fidelity. 8 bits at 8kHz sampling frequency is enough. I didn't m...


A timer driver for Cortex-M0+... it rarely doesn't work

Started by pozz in comp.arch.embedded5 months ago 32 replies

I don't know if it is an issue specific to Atmel SAMC21 Cortex-M0+ devices or not. I wrote a simple timer driver: a 32-bits hw counter...

I don't know if it is an issue specific to Atmel SAMC21 Cortex-M0+ devices or not. I wrote a simple timer driver: a 32-bits hw counter clocked at 875kHz (14MHz/16) that triggers an interrupt on overflow (every 1h 21'). In the interrupt I increment the 32-bits global variable _ticks_high. The 64-bits number composed by _ticks_high (upper 32-bits) and the hw counter (lower 32-bits) is m...


Delayed "printf"

Started by Tim Wescott in comp.arch.embedded5 months ago 27 replies

Sometimes it's necessary to float a notion just so that someone can affirm your suspicion that yes, you really are an idiot. On the off...

Sometimes it's necessary to float a notion just so that someone can affirm your suspicion that yes, you really are an idiot. On the off chance that I'm a genius, though, here goes: I don't like putting "printf" in fast tasks for obvious reasons -- even with infinite spooling, it can take time to process a format string. In my usual context, this can result in audible sounds from motor...


IWOMP 2017 - 13th International Workshop on OpenMP - Extended submission deadline

Started by OpenMP ARB in comp.arch.embedded5 months ago

CALL FOR PAPERS IWOMP 2017 - 13th International Workshop on OpenMP September 20-22, 2017 Stony Brook University, Stony Brook, NY,...

CALL FOR PAPERS IWOMP 2017 - 13th International Workshop on OpenMP September 20-22, 2017 Stony Brook University, Stony Brook, NY, USA http://www.iwomp.org == Background For many years, the OpenMP API has provided a very rich and flexible programming model for shared memory architectures. OpenMP 4.0 is a major advance that adds new forms of parallelism: device constructs=2


USB Data Line Pullup

Started by rickman in comp.arch.embedded5 months ago 1 reply
USB

I'm discussing the data line pullup on a USB dev with someone and I'm not clear on one thing... or maybe two. The pullup is added to one or...

I'm discussing the data line pullup on a USB dev with someone and I'm not clear on one thing... or maybe two. The pullup is added to one or the other of the two differential data lines to indicate the speed of the interface being either low or full. This pullup is supposed to be 1.5 kohms to 3.3 volts. Once the pullup is detected is there any need to remove it? It does create a sligh...


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