We also have CRC4 used by MS5611 barometer sensor. It should be nice to
have all available in the kernel
On Friday, July 15, 2022, Nimish Telang wrote:
> Whichever one is chosen, there should be a table-free implementation for
> code size reasons. FWIW there are more crc implementations in the z
Whichever one is chosen, there should be a table-free implementation for code
size reasons. FWIW there are more crc implementations in the zmodem app:
https://github.com/apache/incubator-nuttx-apps/blob/master/system/zmodem/host/crc16.c
From: Sebastien Lorquet
Date: Friday, July 15, 2022 at 4
I’m trying to load nsh as the init task from an SD card on the SPRESENSE
CXD5602 board (a FLAT build). Normally it just calls nsh_main from the user
init function when INIT_ENTRYPOINT is defined.
I’m not able to determine which combination of symtab options, if any, I should
use with the init f
@Nathan:
Yes, of course.
@Alan:
Of course not, the structure passed to init can be set up to describe
the required algorithm.
But the partial update situation can be useful for protocols where the
message is fragmented (eg radio transceivers with short FIFOs), or where
only some fields ent
On Fri, Jul 15, 2022 at 1:40 PM Alan Carvalho de Assis
wrote:
>
> Hi Sebastien, I think we don't need these three functions for each
> CRC, just one like in the Linux kernel is enough:
>
> https://www.kernel.org/doc/htmldocs/kernel-api/API-crc-ccitt.html
>
> BR,
>
> Alan
Could have one generic f
Hi Sebastien, I think we don't need these three functions for each
CRC, just one like in the Linux kernel is enough:
https://www.kernel.org/doc/htmldocs/kernel-api/API-crc-ccitt.html
BR,
Alan
On 7/15/22, Sebastien Lorquet wrote:
> Hi,
>
> Sorry to throw a rock in the pond but having a single f
On 7/15/22, Karel Kočí wrote:
> The impact might be pretty significant from my search and that is also why I
>
> rather discuss instead of suggesting changes.
>
> The significant place where the current crc32 implementation is used is in
> file systems (such as smartfs or nxffs). The change would
Hi,
Sorry to throw a rock in the pond but having a single function named
"crc32" is very wrong and is not sufficient.
As you have discussed the polynomial length is just not enough to
describe a crc, the initial value, bit orders of input and output, and
bit inversion on input and output are
Excerpts from Nathan Hartman's message of July 15, 2022 6:47 pm:
> On Fri, Jul 15, 2022 at 12:45 PM Karel Kočí wrote:
>>
>> The impact might be pretty significant from my search and that is also why I
>> rather discuss instead of suggesting changes.
>>
>> The significant place where the current cr
On Fri, Jul 15, 2022 at 12:45 PM Karel Kočí wrote:
>
> The impact might be pretty significant from my search and that is also why I
> rather discuss instead of suggesting changes.
>
> The significant place where the current crc32 implementation is used is in
> file systems (such as smartfs or nxff
The impact might be pretty significant from my search and that is also why I
rather discuss instead of suggesting changes.
The significant place where the current crc32 implementation is used is in
file systems (such as smartfs or nxffs). The change would break any existing
formating of those F
This site is very good to compare and test CRCs:
http://www.sunshine2k.de/coding/javascript/crc/crc_js.html
The result is CRC32_JAMCRC as Karel pointed.
So, just like CRC-16, there are many CRC-32 implementations.
Since crc32() function is already used in many places on NuttX I don't
know the i
Excerpts from Nathan Hartman's message of July 15, 2022 2:59 pm:
> On Fri, Jul 15, 2022 at 8:10 AM Karel Kočí wrote:
>>
>> Hi
>>
>> I hit an issue with crc32 implementation in NuttX's LibC and it took me some
>> time to figure out that crc32 is implemented differently in NuttX than I was
>> expec
On Fri, Jul 15, 2022 at 6:55 AM 张铎(Duo Zhang) wrote:
>
> Let's first make sure we have done all the things in the check list?
>
> Abdelatif Guettouche 于2022年7月13日周三 19:40写道：
>
> > It would be nice to hear from the mentors or anyone from the IPMC.
We still need to:
(1) Fill in the STATUS file:
h
On Fri, Jul 15, 2022 at 8:10 AM Karel Kočí wrote:
>
> Hi
>
> I hit an issue with crc32 implementation in NuttX's LibC and it took me some
> time to figure out that crc32 is implemented differently in NuttX than I was
> expecting. Let me explain...
>
> Common implementations are using same precompu
Hi
I hit an issue with crc32 implementation in NuttX's LibC and it took me some
time to figure out that crc32 is implemented differently in NuttX than I was
expecting. Let me explain...
Common implementations are using same precomputed table as there is in the
NuttX, but the initial value is a
Let's first make sure we have done all the things in the check list?
Abdelatif Guettouche 于2022年7月13日周三 19:40写道：
> It would be nice to hear from the mentors or anyone from the IPMC.
>
> On Wed, Jul 13, 2022 at 12:07 AM Nathan Hartman
> wrote:
> >
> > Hi all,
> >
> > As this [DISCUSS] thread has
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