sleepy_dog at gmx.de
sleepy_dog at gmx.de
Fri Feb 22 02:49:08 CET 2019
Ditto. How is any bare metal processor not "real-time"? Unless you
integrate a badly made OS into your firmware yourself, it's as real-time
as it gets. The R4F is only one of the bigger real-timey processors, as
opposed to microcontroller? Or is there a context where real-time has a
very specific meaning other than it's not impeded by a jittery scheduler?
That aside, I find it slightly amusing that the stm32F7 or H7 or
whichever it was that has an out-of-order pipeline and considerable
instruction + data cache and lots of single-cycle float OPs that might
give the first Pentiums a run for their money, is also still considered
to be a "microcontroller" :D
I wonder how many football stadiums such a thing would fill in 1960's tech.
Am 22.02.2019 um 02:01 schrieb Declare Update:
> Brian, I had never considered that an M4 might not be “real time”.
> what do you mean by this? I found this
> https://www.design-reuse.com/articles/26106/cortex-r-versus-cortex-m.html but
> it didn’t clear it up much.
> Sent from my iPhone
> On Feb 21, 2019, at 6:44 PM, Brian Willoughby <brianw at audiobanshee.com
> <mailto:brianw at audiobanshee.com>> wrote:
>> Interesting. I wouldn’t call the Cortex-M4 a “real-time” MCU.
>> Embedded, certainly, but not Real-Time. I think you’d have to look at
>> the Cortex-R4F for real-time.
>> I’m still (sort of) waiting for the open source community to support
>> either the TMS320 DSP family or the SHARC DSP family. The Aleph was
>> Blackfin, but that’s only about half way to SHARC or TMS320 DSP
>> On Feb 21, 2019, at 12:47 PM, sleepy_dog at gmx.de
>> <mailto:sleepy_dog at gmx.de> wrote:
>>> may be of interest for some:
>>> There is a discovery board for $ 69,- with this new STMicro
>>> processor, 512MB RAM, audio codec, SPDIF connectors and other stuff.
>>> The processor has a dual core ARM Cortex A7 @ 650 MHz which can run
>>> Linux, and one Cortex M4 with FPU @ 209 MHz, LCD TFT controller...
>>> Lots of audio projects shenanigans could be done with that - which
>>> is probably also true for the raspberry pi family - but having a
>>> real-time MCU (the M4) also integrated seems nice for some stuff.
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>> Synth-diy at synth-diy.org <mailto:Synth-diy at synth-diy.org>
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