LittleFS Implementation using MTD for NOR flash
Hi community, I am trying to get littlefs running on a NOR flash memory using the MTD driver, on a STM32F4 chip. I had some bottlenecks in the implementation as I am an out-and-out novice when it comes to Nuttx. I have written a custom driver for the flash, which is working with MTD, as I couldn't find the exact driver for the flash installed on my system. Now I need some guidance on where to start for linking LittleFS to MTD and the rest.. Best Regards, Janardhan Silwal
Re: LittleFS Implementation using MTD for NOR flash
Hi,
What flash are you using out of interest?
But, the basic approach (in or called from your board bringup for
example) is:
spi_flash= sam_spibus_initialize(PORT); /* this call is arch dependent */
if(!spi_flash)
{
/* Do something */
}
#ifdefined(CONFIG_MTD_M25P)
mtd = m25p_initialize(spi_flash, MINOR);
#elifdefined(CONFIG_MTD_GD25)
mtd = gd25_initialize(spi_flash, MINOR);
#elif defined(CONFIG_MTD_YOURFLASHTYPE)
/* etc */
#endif
if(!mtd)
{
/* Do something */
}
#ifdefined(CONFIG_FS_LITTLEFS)
/* Mount the LittleFS file system */
ret = register_mtddriver("/dev/flash", mtd, 0755, NULL);
if(ret < 0)
{
/* Do something */
}
ret = nx_mount("/dev/flash", "/mnt/flash", "littlefs", 0, "autoformat");
if(ret < 0)
{
/* Do something */
}
That was a copy/paste/edit or my own code so please forgive any typo errors!
On 28/12/2023 11:19, Janardhan Silwal wrote:
Hi community,
I am trying to get littlefs running on a NOR flash memory using the MTD driver,
on a STM32F4 chip.
I had some bottlenecks in the implementation as I am an out-and-out novice when
it comes to Nuttx.
I have written a custom driver for the flash, which is working with MTD, as I
couldn't find the exact driver for the flash installed on my system.
Now I need some guidance on where to start for linking LittleFS to MTD and the
rest..
Best Regards,
Janardhan Silwal
Re: LittleFS Implementation using MTD for NOR flash
Hi,
I am using MT25QL, 1Gbit series flash memory.
Thanks for the template.
Would running in this format over the middleware running over nuttx also follow
the same approach?
Best Regards,
Janardhan
From: Tim Hardisty
Sent: Thursday, December 28, 2023 17:31
To: dev@nuttx.apache.org
Subject: Re: LittleFS Implementation using MTD for NOR flash
Hi,
What flash are you using out of interest?
But, the basic approach (in or called from your board bringup for
example) is:
spi_flash= sam_spibus_initialize(PORT); /* this call is arch dependent */
if(!spi_flash)
{
/* Do something */
}
#ifdefined(CONFIG_MTD_M25P)
mtd = m25p_initialize(spi_flash, MINOR);
#elifdefined(CONFIG_MTD_GD25)
mtd = gd25_initialize(spi_flash, MINOR);
#elif defined(CONFIG_MTD_YOURFLASHTYPE)
/* etc */
#endif
if(!mtd)
{
/* Do something */
}
#ifdefined(CONFIG_FS_LITTLEFS)
/* Mount the LittleFS file system */
ret = register_mtddriver("/dev/flash", mtd, 0755, NULL);
if(ret < 0)
{
/* Do something */
}
ret = nx_mount("/dev/flash", "/mnt/flash", "littlefs", 0, "autoformat");
if(ret < 0)
{
/* Do something */
}
That was a copy/paste/edit or my own code so please forgive any typo errors!
On 28/12/2023 11:19, Janardhan Silwal wrote:
> Hi community,
>
> I am trying to get littlefs running on a NOR flash memory using the MTD
> driver, on a STM32F4 chip.
>
> I had some bottlenecks in the implementation as I am an out-and-out novice
> when it comes to Nuttx.
> I have written a custom driver for the flash, which is working with MTD, as
> I couldn't find the exact driver for the flash installed on my system.
>
> Now I need some guidance on where to start for linking LittleFS to MTD and
> the rest..
>
> Best Regards,
> Janardhan Silwal
>
Re: LittleFS Implementation using MTD for NOR flash
I have only ever used NuttX "directly" with my apps running over it
rather than any other middleware or anything, so I can't answer that.
My board has been fitted with a MT25QL01GBBB8ESF, and has worked fine,
so your flash is most likely supported already?
On 28/12/2023 12:12, Janardhan Silwal wrote:
Hi,
I am using MT25QL, 1Gbit series flash memory.
Thanks for the template.
Would running in this format over the middleware running over nuttx also follow
the same approach?
Best Regards,
Janardhan
From: Tim Hardisty
Sent: Thursday, December 28, 2023 17:31
To:dev@nuttx.apache.org
Subject: Re: LittleFS Implementation using MTD for NOR flash
Hi,
What flash are you using out of interest?
But, the basic approach (in or called from your board bringup for
example) is:
spi_flash= sam_spibus_initialize(PORT); /* this call is arch dependent */
if(!spi_flash)
{
/* Do something */
}
#ifdefined(CONFIG_MTD_M25P)
mtd = m25p_initialize(spi_flash, MINOR);
#elifdefined(CONFIG_MTD_GD25)
mtd = gd25_initialize(spi_flash, MINOR);
#elif defined(CONFIG_MTD_YOURFLASHTYPE)
/* etc */
#endif
if(!mtd)
{
/* Do something */
}
#ifdefined(CONFIG_FS_LITTLEFS)
/* Mount the LittleFS file system */
ret = register_mtddriver("/dev/flash", mtd, 0755, NULL);
if(ret < 0)
{
/* Do something */
}
ret = nx_mount("/dev/flash", "/mnt/flash", "littlefs", 0, "autoformat");
if(ret < 0)
{
/* Do something */
}
That was a copy/paste/edit or my own code so please forgive any typo errors!
On 28/12/2023 11:19, Janardhan Silwal wrote:
Hi community,
I am trying to get littlefs running on a NOR flash memory using the MTD driver,
on a STM32F4 chip.
I had some bottlenecks in the implementation as I am an out-and-out novice when
it comes to Nuttx.
I have written a custom driver for the flash, which is working with MTD, as I
couldn't find the exact driver for the flash installed on my system.
Now I need some guidance on where to start for linking LittleFS to MTD and the
rest..
Best Regards,
Janardhan Silwal
Re: LittleFS Implementation using MTD for NOR flash
which driver did you use?
I didn't see MT25QL SPI flash in menu config so I went ahead and wrote one!
Best regards,
Janardhan
From: Tim Hardisty
Sent: Thursday, December 28, 2023 19:15
To: dev@nuttx.apache.org
Subject: Re: LittleFS Implementation using MTD for NOR flash
I have only ever used NuttX "directly" with my apps running over it
rather than any other middleware or anything, so I can't answer that.
My board has been fitted with a MT25QL01GBBB8ESF, and has worked fine,
so your flash is most likely supported already?
On 28/12/2023 12:12, Janardhan Silwal wrote:
> Hi,
>
> I am using MT25QL, 1Gbit series flash memory.
>
> Thanks for the template.
> Would running in this format over the middleware running over nuttx also
> follow the same approach?
>
> Best Regards,
> Janardhan
>
> From: Tim Hardisty
> Sent: Thursday, December 28, 2023 17:31
> To:dev@nuttx.apache.org
> Subject: Re: LittleFS Implementation using MTD for NOR flash
>
> Hi,
>
> What flash are you using out of interest?
>
> But, the basic approach (in or called from your board bringup for
> example) is:
>
>
> spi_flash= sam_spibus_initialize(PORT); /* this call is arch dependent */
> if(!spi_flash)
> {
> /* Do something */
> }
> #ifdefined(CONFIG_MTD_M25P)
> mtd = m25p_initialize(spi_flash, MINOR);
> #elifdefined(CONFIG_MTD_GD25)
> mtd = gd25_initialize(spi_flash, MINOR);
> #elif defined(CONFIG_MTD_YOURFLASHTYPE)
> /* etc */
> #endif
> if(!mtd)
> {
> /* Do something */
> }
> #ifdefined(CONFIG_FS_LITTLEFS)
> /* Mount the LittleFS file system */
> ret = register_mtddriver("/dev/flash", mtd, 0755, NULL);
> if(ret < 0)
> {
> /* Do something */
> }
> ret = nx_mount("/dev/flash", "/mnt/flash", "littlefs", 0, "autoformat");
> if(ret < 0)
> {
> /* Do something */
> }
>
> That was a copy/paste/edit or my own code so please forgive any typo errors!
>
> On 28/12/2023 11:19, Janardhan Silwal wrote:
>> Hi community,
>>
>> I am trying to get littlefs running on a NOR flash memory using the MTD
>> driver, on a STM32F4 chip.
>>
>> I had some bottlenecks in the implementation as I am an out-and-out novice
>> when it comes to Nuttx.
>> I have written a custom driver for the flash, which is working with MTD, as
>> I couldn't find the exact driver for the flash installed on my system.
>>
>> Now I need some guidance on where to start for linking LittleFS to MTD and
>> the rest..
>>
>> Best Regards,
>> Janardhan Silwal
>>
Re: LittleFS Implementation using MTD for NOR flash
Device Drivers -> Memory Technology Device (MTD) Support -> SPI-based
M25P/MT25Q
On 28/12/2023 14:28, Janardhan Silwal wrote:
which driver did you use?
I didn't see MT25QL SPI flash in menu config so I went ahead and wrote one!
Best regards,
Janardhan
From: Tim Hardisty
Sent: Thursday, December 28, 2023 19:15
To:dev@nuttx.apache.org
Subject: Re: LittleFS Implementation using MTD for NOR flash
I have only ever used NuttX "directly" with my apps running over it
rather than any other middleware or anything, so I can't answer that.
My board has been fitted with a MT25QL01GBBB8ESF, and has worked fine,
so your flash is most likely supported already?
On 28/12/2023 12:12, Janardhan Silwal wrote:
Hi,
I am using MT25QL, 1Gbit series flash memory.
Thanks for the template.
Would running in this format over the middleware running over nuttx also follow
the same approach?
Best Regards,
Janardhan
From: Tim Hardisty
Sent: Thursday, December 28, 2023 17:31
To:dev@nuttx.apache.org
Subject: Re: LittleFS Implementation using MTD for NOR flash
Hi,
What flash are you using out of interest?
But, the basic approach (in or called from your board bringup for
example) is:
spi_flash= sam_spibus_initialize(PORT); /* this call is arch dependent */
if(!spi_flash)
{
/* Do something */
}
#ifdefined(CONFIG_MTD_M25P)
mtd = m25p_initialize(spi_flash, MINOR);
#elifdefined(CONFIG_MTD_GD25)
mtd = gd25_initialize(spi_flash, MINOR);
#elif defined(CONFIG_MTD_YOURFLASHTYPE)
/* etc */
#endif
if(!mtd)
{
/* Do something */
}
#ifdefined(CONFIG_FS_LITTLEFS)
/* Mount the LittleFS file system */
ret = register_mtddriver("/dev/flash", mtd, 0755, NULL);
if(ret < 0)
{
/* Do something */
}
ret = nx_mount("/dev/flash", "/mnt/flash", "littlefs", 0, "autoformat");
if(ret < 0)
{
/* Do something */
}
That was a copy/paste/edit or my own code so please forgive any typo errors!
On 28/12/2023 11:19, Janardhan Silwal wrote:
Hi community,
I am trying to get littlefs running on a NOR flash memory using the MTD driver,
on a STM32F4 chip.
I had some bottlenecks in the implementation as I am an out-and-out novice when
it comes to Nuttx.
I have written a custom driver for the flash, which is working with MTD, as I
couldn't find the exact driver for the flash installed on my system.
Now I need some guidance on where to start for linking LittleFS to MTD and the
rest..
Best Regards,
Janardhan Silwal
Re: LittleFS Implementation using MTD for NOR flash
FYI - if you type the / character in menuconfig it will allow you to
search for things (e.g. /MT25 will show two entries relating to MT25
memory - the MTD settings and the actual flash ID of the device you're
using (which will need to exist in the relevant driver code of course -
so with your code editor search all files in the project for MT25Q
related data and you'll find the data in m25px.c I think)
On 28/12/2023 14:28, Janardhan Silwal wrote:
which driver did you use?
I didn't see MT25QL SPI flash in menu config so I went ahead and wrote one!
Best regards,
Janardhan
From: Tim Hardisty
Sent: Thursday, December 28, 2023 19:15
To:dev@nuttx.apache.org
Subject: Re: LittleFS Implementation using MTD for NOR flash
I have only ever used NuttX "directly" with my apps running over it
rather than any other middleware or anything, so I can't answer that.
My board has been fitted with a MT25QL01GBBB8ESF, and has worked fine,
so your flash is most likely supported already?
On 28/12/2023 12:12, Janardhan Silwal wrote:
Hi,
I am using MT25QL, 1Gbit series flash memory.
Thanks for the template.
Would running in this format over the middleware running over nuttx also follow
the same approach?
Best Regards,
Janardhan
From: Tim Hardisty
Sent: Thursday, December 28, 2023 17:31
To:dev@nuttx.apache.org
Subject: Re: LittleFS Implementation using MTD for NOR flash
Hi,
What flash are you using out of interest?
But, the basic approach (in or called from your board bringup for
example) is:
spi_flash= sam_spibus_initialize(PORT); /* this call is arch dependent */
if(!spi_flash)
{
/* Do something */
}
#ifdefined(CONFIG_MTD_M25P)
mtd = m25p_initialize(spi_flash, MINOR);
#elifdefined(CONFIG_MTD_GD25)
mtd = gd25_initialize(spi_flash, MINOR);
#elif defined(CONFIG_MTD_YOURFLASHTYPE)
/* etc */
#endif
if(!mtd)
{
/* Do something */
}
#ifdefined(CONFIG_FS_LITTLEFS)
/* Mount the LittleFS file system */
ret = register_mtddriver("/dev/flash", mtd, 0755, NULL);
if(ret < 0)
{
/* Do something */
}
ret = nx_mount("/dev/flash", "/mnt/flash", "littlefs", 0, "autoformat");
if(ret < 0)
{
/* Do something */
}
That was a copy/paste/edit or my own code so please forgive any typo errors!
On 28/12/2023 11:19, Janardhan Silwal wrote:
Hi community,
I am trying to get littlefs running on a NOR flash memory using the MTD driver,
on a STM32F4 chip.
I had some bottlenecks in the implementation as I am an out-and-out novice when
it comes to Nuttx.
I have written a custom driver for the flash, which is working with MTD, as I
couldn't find the exact driver for the flash installed on my system.
Now I need some guidance on where to start for linking LittleFS to MTD and the
rest..
Best Regards,
Janardhan Silwal
Re: LittleFS Implementation using MTD for NOR flash
Hi,
I tried using the template that you provied.
I have gotten the mtd partition blocks mounted using littefs. And tried
creating and writing a test message to the file via nsh shell.
The file seems to have been created, and the test message does exist even after
power cycling.
So, now how do I go about creating application which creates, write to and read
from file on the mounted partition?
Best Regards,
Janardhan
From: Tim Hardisty
Sent: Thursday, December 28, 2023 20:36
To: dev@nuttx.apache.org
Subject: Re: LittleFS Implementation using MTD for NOR flash
FYI - if you type the / character in menuconfig it will allow you to
search for things (e.g. /MT25 will show two entries relating to MT25
memory - the MTD settings and the actual flash ID of the device you're
using (which will need to exist in the relevant driver code of course -
so with your code editor search all files in the project for MT25Q
related data and you'll find the data in m25px.c I think)
On 28/12/2023 14:28, Janardhan Silwal wrote:
> which driver did you use?
> I didn't see MT25QL SPI flash in menu config so I went ahead and wrote one!
>
> Best regards,
> Janardhan
>
> From: Tim Hardisty
> Sent: Thursday, December 28, 2023 19:15
> To:dev@nuttx.apache.org
> Subject: Re: LittleFS Implementation using MTD for NOR flash
>
> I have only ever used NuttX "directly" with my apps running over it
> rather than any other middleware or anything, so I can't answer that.
>
> My board has been fitted with a MT25QL01GBBB8ESF, and has worked fine,
> so your flash is most likely supported already?
>
> On 28/12/2023 12:12, Janardhan Silwal wrote:
>> Hi,
>>
>> I am using MT25QL, 1Gbit series flash memory.
>>
>> Thanks for the template.
>> Would running in this format over the middleware running over nuttx also
>> follow the same approach?
>>
>> Best Regards,
>> Janardhan
>>
>> From: Tim Hardisty
>> Sent: Thursday, December 28, 2023 17:31
>> To:dev@nuttx.apache.org
>> Subject: Re: LittleFS Implementation using MTD for NOR flash
>>
>> Hi,
>>
>> What flash are you using out of interest?
>>
>> But, the basic approach (in or called from your board bringup for
>> example) is:
>>
>>
>> spi_flash= sam_spibus_initialize(PORT); /* this call is arch dependent */
>> if(!spi_flash)
>> {
>> /* Do something */
>> }
>> #ifdefined(CONFIG_MTD_M25P)
>> mtd = m25p_initialize(spi_flash, MINOR);
>> #elifdefined(CONFIG_MTD_GD25)
>> mtd = gd25_initialize(spi_flash, MINOR);
>> #elif defined(CONFIG_MTD_YOURFLASHTYPE)
>> /* etc */
>> #endif
>> if(!mtd)
>> {
>> /* Do something */
>> }
>> #ifdefined(CONFIG_FS_LITTLEFS)
>> /* Mount the LittleFS file system */
>> ret = register_mtddriver("/dev/flash", mtd, 0755, NULL);
>> if(ret < 0)
>> {
>> /* Do something */
>> }
>> ret = nx_mount("/dev/flash", "/mnt/flash", "littlefs", 0, "autoformat");
>> if(ret < 0)
>> {
>> /* Do something */
>> }
>>
>> That was a copy/paste/edit or my own code so please forgive any typo errors!
>>
>> On 28/12/2023 11:19, Janardhan Silwal wrote:
>>> Hi community,
>>>
>>> I am trying to get littlefs running on a NOR flash memory using the MTD
>>> driver, on a STM32F4 chip.
>>>
>>> I had some bottlenecks in the implementation as I am an out-and-out novice
>>> when it comes to Nuttx.
>>> I have written a custom driver for the flash, which is working with MTD, as
>>> I couldn't find the exact driver for the flash installed on my system.
>>>
>>> Now I need some guidance on where to start for linking LittleFS to MTD and
>>> the rest..
>>>
>>> Best Regards,
>>> Janardhan Silwal
>>>
Re: LittleFS Implementation using MTD for NOR flash
Oh!!
So that is the one you used.
I did see that on the menu config, but wasn't sure if it was the one. and I was
halfway through completing the driver when I noticed that option in menu config
anyway, so I went ahead and completed the driver.
Anyway it is working, so no worries there.
Thanks though.
Best Regards,
Janardhan
From: Tim Hardisty
Sent: Thursday, December 28, 2023 20:18
To: dev@nuttx.apache.org
Subject: Re: LittleFS Implementation using MTD for NOR flash
Device Drivers -> Memory Technology Device (MTD) Support -> SPI-based
M25P/MT25Q
On 28/12/2023 14:28, Janardhan Silwal wrote:
> which driver did you use?
> I didn't see MT25QL SPI flash in menu config so I went ahead and wrote one!
>
> Best regards,
> Janardhan
>
> From: Tim Hardisty
> Sent: Thursday, December 28, 2023 19:15
> To:dev@nuttx.apache.org
> Subject: Re: LittleFS Implementation using MTD for NOR flash
>
> I have only ever used NuttX "directly" with my apps running over it
> rather than any other middleware or anything, so I can't answer that.
>
> My board has been fitted with a MT25QL01GBBB8ESF, and has worked fine,
> so your flash is most likely supported already?
>
> On 28/12/2023 12:12, Janardhan Silwal wrote:
>> Hi,
>>
>> I am using MT25QL, 1Gbit series flash memory.
>>
>> Thanks for the template.
>> Would running in this format over the middleware running over nuttx also
>> follow the same approach?
>>
>> Best Regards,
>> Janardhan
>>
>> From: Tim Hardisty
>> Sent: Thursday, December 28, 2023 17:31
>> To:dev@nuttx.apache.org
>> Subject: Re: LittleFS Implementation using MTD for NOR flash
>>
>> Hi,
>>
>> What flash are you using out of interest?
>>
>> But, the basic approach (in or called from your board bringup for
>> example) is:
>>
>>
>> spi_flash= sam_spibus_initialize(PORT); /* this call is arch dependent */
>> if(!spi_flash)
>> {
>> /* Do something */
>> }
>> #ifdefined(CONFIG_MTD_M25P)
>> mtd = m25p_initialize(spi_flash, MINOR);
>> #elifdefined(CONFIG_MTD_GD25)
>> mtd = gd25_initialize(spi_flash, MINOR);
>> #elif defined(CONFIG_MTD_YOURFLASHTYPE)
>> /* etc */
>> #endif
>> if(!mtd)
>> {
>> /* Do something */
>> }
>> #ifdefined(CONFIG_FS_LITTLEFS)
>> /* Mount the LittleFS file system */
>> ret = register_mtddriver("/dev/flash", mtd, 0755, NULL);
>> if(ret < 0)
>> {
>> /* Do something */
>> }
>> ret = nx_mount("/dev/flash", "/mnt/flash", "littlefs", 0, "autoformat");
>> if(ret < 0)
>> {
>> /* Do something */
>> }
>>
>> That was a copy/paste/edit or my own code so please forgive any typo errors!
>>
>> On 28/12/2023 11:19, Janardhan Silwal wrote:
>>> Hi community,
>>>
>>> I am trying to get littlefs running on a NOR flash memory using the MTD
>>> driver, on a STM32F4 chip.
>>>
>>> I had some bottlenecks in the implementation as I am an out-and-out novice
>>> when it comes to Nuttx.
>>> I have written a custom driver for the flash, which is working with MTD, as
>>> I couldn't find the exact driver for the flash installed on my system.
>>>
>>> Now I need some guidance on where to start for linking LittleFS to MTD and
>>> the rest..
>>>
>>> Best Regards,
>>> Janardhan Silwal
>>>
Re: LittleFS Implementation using MTD for NOR flash
On Thu, Dec 28, 2023 at 04:46:08PM +, Janardhan Silwal wrote:
> Oh!!
> So that is the one you used.
> I did see that on the menu config, but wasn't sure if it was the one. and I
> was halfway through completing the driver when I noticed that option in menu
> config anyway, so I went ahead and completed the driver.
> Anyway it is working, so no worries there.
> Thanks though.
I really wonder why the are so many *25 NOR-flash drivers to begin with.
Aren't they supposed to be similar and autoprobing?
>
> From: Tim Hardisty
> Sent: Thursday, December 28, 2023 20:18
> To: dev@nuttx.apache.org
> Subject: Re: LittleFS Implementation using MTD for NOR flash
>
> Device Drivers -> Memory Technology Device (MTD) Support -> SPI-based
> M25P/MT25Q
>
> On 28/12/2023 14:28, Janardhan Silwal wrote:
> > which driver did you use?
> > I didn't see MT25QL SPI flash in menu config so I went ahead and wrote one!
> >
> > Best regards,
> > Janardhan
> >
> > From: Tim Hardisty
> > Sent: Thursday, December 28, 2023 19:15
> > To:dev@nuttx.apache.org
> > Subject: Re: LittleFS Implementation using MTD for NOR flash
> >
> > I have only ever used NuttX "directly" with my apps running over it
> > rather than any other middleware or anything, so I can't answer that.
> >
> > My board has been fitted with a MT25QL01GBBB8ESF, and has worked fine,
> > so your flash is most likely supported already?
> >
> > On 28/12/2023 12:12, Janardhan Silwal wrote:
> >> Hi,
> >>
> >> I am using MT25QL, 1Gbit series flash memory.
> >>
> >> Thanks for the template.
> >> Would running in this format over the middleware running over nuttx also
> >> follow the same approach?
> >>
> >> Best Regards,
> >> Janardhan
> >>
> >> From: Tim Hardisty
> >> Sent: Thursday, December 28, 2023 17:31
> >> To:dev@nuttx.apache.org
> >> Subject: Re: LittleFS Implementation using MTD for NOR flash
> >>
> >> Hi,
> >>
> >> What flash are you using out of interest?
> >>
> >> But, the basic approach (in or called from your board bringup for
> >> example) is:
> >>
> >>
> >> spi_flash= sam_spibus_initialize(PORT); /* this call is arch dependent */
> >> if(!spi_flash)
> >> {
> >> /* Do something */
> >> }
> >> #ifdefined(CONFIG_MTD_M25P)
> >> mtd = m25p_initialize(spi_flash, MINOR);
> >> #elifdefined(CONFIG_MTD_GD25)
> >> mtd = gd25_initialize(spi_flash, MINOR);
> >> #elif defined(CONFIG_MTD_YOURFLASHTYPE)
> >> /* etc */
> >> #endif
> >> if(!mtd)
> >> {
> >> /* Do something */
> >> }
> >> #ifdefined(CONFIG_FS_LITTLEFS)
> >> /* Mount the LittleFS file system */
> >> ret = register_mtddriver("/dev/flash", mtd, 0755, NULL);
> >> if(ret < 0)
> >> {
> >> /* Do something */
> >> }
> >> ret = nx_mount("/dev/flash", "/mnt/flash", "littlefs", 0, "autoformat");
> >> if(ret < 0)
> >> {
> >> /* Do something */
> >> }
> >>
> >> That was a copy/paste/edit or my own code so please forgive any typo
> >> errors!
> >>
> >> On 28/12/2023 11:19, Janardhan Silwal wrote:
> >>> Hi community,
> >>>
> >>> I am trying to get littlefs running on a NOR flash memory using the MTD
> >>> driver, on a STM32F4 chip.
> >>>
> >>> I had some bottlenecks in the implementation as I am an out-and-out
> >>> novice when it comes to Nuttx.
> >>> I have written a custom driver for the flash, which is working with MTD,
> >>> as I couldn't find the exact driver for the flash installed on my system.
> >>>
> >>> Now I need some guidance on where to start for linking LittleFS to MTD
> >>> and the rest..
> >>>
> >>> Best Regards,
> >>> Janardhan Silwal
> >>>
--
B.Walter https://www.bwct.de
Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm.
Re: LittleFS Implementation using MTD for NOR flash
Code size?
> On 28 Dec 2023, at 17:11, Bernd Walter wrote:
>
> On Thu, Dec 28, 2023 at 04:46:08PM +, Janardhan Silwal wrote:
>> Oh!!
>> So that is the one you used.
>> I did see that on the menu config, but wasn't sure if it was the one. and I
>> was halfway through completing the driver when I noticed that option in menu
>> config anyway, so I went ahead and completed the driver.
>> Anyway it is working, so no worries there.
>> Thanks though.
>
> I really wonder why the are so many *25 NOR-flash drivers to begin with.
> Aren't they supposed to be similar and autoprobing?
>
>>
>> From: Tim Hardisty
>> Sent: Thursday, December 28, 2023 20:18
>> To: dev@nuttx.apache.org
>> Subject: Re: LittleFS Implementation using MTD for NOR flash
>>
>> Device Drivers -> Memory Technology Device (MTD) Support -> SPI-based
>> M25P/MT25Q
>>
>>> On 28/12/2023 14:28, Janardhan Silwal wrote:
>>> which driver did you use?
>>> I didn't see MT25QL SPI flash in menu config so I went ahead and wrote one!
>>>
>>> Best regards,
>>> Janardhan
>>>
>>> From: Tim Hardisty
>>> Sent: Thursday, December 28, 2023 19:15
>>> To:dev@nuttx.apache.org
>>> Subject: Re: LittleFS Implementation using MTD for NOR flash
>>>
>>> I have only ever used NuttX "directly" with my apps running over it
>>> rather than any other middleware or anything, so I can't answer that.
>>>
>>> My board has been fitted with a MT25QL01GBBB8ESF, and has worked fine,
>>> so your flash is most likely supported already?
>>>
>>> On 28/12/2023 12:12, Janardhan Silwal wrote:
Hi,
I am using MT25QL, 1Gbit series flash memory.
Thanks for the template.
Would running in this format over the middleware running over nuttx also
follow the same approach?
Best Regards,
Janardhan
From: Tim Hardisty
Sent: Thursday, December 28, 2023 17:31
To:dev@nuttx.apache.org
Subject: Re: LittleFS Implementation using MTD for NOR flash
Hi,
What flash are you using out of interest?
But, the basic approach (in or called from your board bringup for
example) is:
spi_flash= sam_spibus_initialize(PORT); /* this call is arch dependent */
if(!spi_flash)
{
/* Do something */
}
#ifdefined(CONFIG_MTD_M25P)
mtd = m25p_initialize(spi_flash, MINOR);
#elifdefined(CONFIG_MTD_GD25)
mtd = gd25_initialize(spi_flash, MINOR);
#elif defined(CONFIG_MTD_YOURFLASHTYPE)
/* etc */
#endif
if(!mtd)
{
/* Do something */
}
#ifdefined(CONFIG_FS_LITTLEFS)
/* Mount the LittleFS file system */
ret = register_mtddriver("/dev/flash", mtd, 0755, NULL);
if(ret < 0)
{
/* Do something */
}
ret = nx_mount("/dev/flash", "/mnt/flash", "littlefs", 0, "autoformat");
if(ret < 0)
{
/* Do something */
}
That was a copy/paste/edit or my own code so please forgive any typo
errors!
On 28/12/2023 11:19, Janardhan Silwal wrote:
> Hi community,
>
> I am trying to get littlefs running on a NOR flash memory using the MTD
> driver, on a STM32F4 chip.
>
> I had some bottlenecks in the implementation as I am an out-and-out
> novice when it comes to Nuttx.
> I have written a custom driver for the flash, which is working with MTD,
> as I couldn't find the exact driver for the flash installed on my system.
>
> Now I need some guidance on where to start for linking LittleFS to MTD
> and the rest..
>
> Best Regards,
> Janardhan Silwal
>
>
> --
> B.Walter https://www.bwct.de
> Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm.
Re: LittleFS Implementation using MTD for NOR flash
Standard POSIX file opens etc. Look at the various offerings in nuttx-apps to
get the idea.
> On 28 Dec 2023, at 16:44, Janardhan Silwal
> wrote:
>
> Hi,
>
> I tried using the template that you provied.
>
> I have gotten the mtd partition blocks mounted using littefs. And tried
> creating and writing a test message to the file via nsh shell.
> The file seems to have been created, and the test message does exist even
> after power cycling.
>
> So, now how do I go about creating application which creates, write to and
> read from file on the mounted partition?
>
> Best Regards,
>
> Janardhan
>
> From: Tim Hardisty
> Sent: Thursday, December 28, 2023 20:36
> To: dev@nuttx.apache.org
> Subject: Re: LittleFS Implementation using MTD for NOR flash
>
> FYI - if you type the / character in menuconfig it will allow you to
> search for things (e.g. /MT25 will show two entries relating to MT25
> memory - the MTD settings and the actual flash ID of the device you're
> using (which will need to exist in the relevant driver code of course -
> so with your code editor search all files in the project for MT25Q
> related data and you'll find the data in m25px.c I think)
>
>> On 28/12/2023 14:28, Janardhan Silwal wrote:
>> which driver did you use?
>> I didn't see MT25QL SPI flash in menu config so I went ahead and wrote one!
>>
>> Best regards,
>> Janardhan
>>
>> From: Tim Hardisty
>> Sent: Thursday, December 28, 2023 19:15
>> To:dev@nuttx.apache.org
>> Subject: Re: LittleFS Implementation using MTD for NOR flash
>>
>> I have only ever used NuttX "directly" with my apps running over it
>> rather than any other middleware or anything, so I can't answer that.
>>
>> My board has been fitted with a MT25QL01GBBB8ESF, and has worked fine,
>> so your flash is most likely supported already?
>>
>>> On 28/12/2023 12:12, Janardhan Silwal wrote:
>>> Hi,
>>>
>>> I am using MT25QL, 1Gbit series flash memory.
>>>
>>> Thanks for the template.
>>> Would running in this format over the middleware running over nuttx also
>>> follow the same approach?
>>>
>>> Best Regards,
>>> Janardhan
>>>
>>> From: Tim Hardisty
>>> Sent: Thursday, December 28, 2023 17:31
>>> To:dev@nuttx.apache.org
>>> Subject: Re: LittleFS Implementation using MTD for NOR flash
>>>
>>> Hi,
>>>
>>> What flash are you using out of interest?
>>>
>>> But, the basic approach (in or called from your board bringup for
>>> example) is:
>>>
>>>
>>> spi_flash= sam_spibus_initialize(PORT); /* this call is arch dependent */
>>> if(!spi_flash)
>>> {
>>> /* Do something */
>>> }
>>> #ifdefined(CONFIG_MTD_M25P)
>>> mtd = m25p_initialize(spi_flash, MINOR);
>>> #elifdefined(CONFIG_MTD_GD25)
>>> mtd = gd25_initialize(spi_flash, MINOR);
>>> #elif defined(CONFIG_MTD_YOURFLASHTYPE)
>>> /* etc */
>>> #endif
>>> if(!mtd)
>>> {
>>> /* Do something */
>>> }
>>> #ifdefined(CONFIG_FS_LITTLEFS)
>>> /* Mount the LittleFS file system */
>>> ret = register_mtddriver("/dev/flash", mtd, 0755, NULL);
>>> if(ret < 0)
>>> {
>>> /* Do something */
>>> }
>>> ret = nx_mount("/dev/flash", "/mnt/flash", "littlefs", 0, "autoformat");
>>> if(ret < 0)
>>> {
>>> /* Do something */
>>> }
>>>
>>> That was a copy/paste/edit or my own code so please forgive any typo errors!
>>>
>>> On 28/12/2023 11:19, Janardhan Silwal wrote:
Hi community,
I am trying to get littlefs running on a NOR flash memory using the MTD
driver, on a STM32F4 chip.
I had some bottlenecks in the implementation as I am an out-and-out novice
when it comes to Nuttx.
I have written a custom driver for the flash, which is working with MTD,
as I couldn't find the exact driver for the flash installed on my system.
Now I need some guidance on where to start for linking LittleFS to MTD and
the rest..
Best Regards,
Janardhan Silwal
Re: LittleFS Implementation using MTD for NOR flash
On Thu, Dec 28, 2023 at 06:22:05PM +, Tim Hardisty wrote:
> Code size?
Hardly an argument when the basic read and write is the same code and the
remaining could be under #ifdef.
On the other hand there is a lot of bloated code if a board could
be populated with two a more different chips.
> > On 28 Dec 2023, at 17:11, Bernd Walter wrote:
> >
> > On Thu, Dec 28, 2023 at 04:46:08PM +, Janardhan Silwal wrote:
> >> Oh!!
> >> So that is the one you used.
> >> I did see that on the menu config, but wasn't sure if it was the one. and
> >> I was halfway through completing the driver when I noticed that option in
> >> menu config anyway, so I went ahead and completed the driver.
> >> Anyway it is working, so no worries there.
> >> Thanks though.
> >
> > I really wonder why the are so many *25 NOR-flash drivers to begin with.
> > Aren't they supposed to be similar and autoprobing?
> >
> >>
> >> From: Tim Hardisty
> >> Sent: Thursday, December 28, 2023 20:18
> >> To: dev@nuttx.apache.org
> >> Subject: Re: LittleFS Implementation using MTD for NOR flash
> >>
> >> Device Drivers -> Memory Technology Device (MTD) Support -> SPI-based
> >> M25P/MT25Q
> >>
> >>> On 28/12/2023 14:28, Janardhan Silwal wrote:
> >>> which driver did you use?
> >>> I didn't see MT25QL SPI flash in menu config so I went ahead and wrote
> >>> one!
> >>>
> >>> Best regards,
> >>> Janardhan
> >>>
> >>> From: Tim Hardisty
> >>> Sent: Thursday, December 28, 2023 19:15
> >>> To:dev@nuttx.apache.org
> >>> Subject: Re: LittleFS Implementation using MTD for NOR flash
> >>>
> >>> I have only ever used NuttX "directly" with my apps running over it
> >>> rather than any other middleware or anything, so I can't answer that.
> >>>
> >>> My board has been fitted with a MT25QL01GBBB8ESF, and has worked fine,
> >>> so your flash is most likely supported already?
> >>>
> >>> On 28/12/2023 12:12, Janardhan Silwal wrote:
> Hi,
>
> I am using MT25QL, 1Gbit series flash memory.
>
> Thanks for the template.
> Would running in this format over the middleware running over nuttx also
> follow the same approach?
>
> Best Regards,
> Janardhan
>
> From: Tim Hardisty
> Sent: Thursday, December 28, 2023 17:31
> To:dev@nuttx.apache.org
> Subject: Re: LittleFS Implementation using MTD for NOR flash
>
> Hi,
>
> What flash are you using out of interest?
>
> But, the basic approach (in or called from your board bringup for
> example) is:
>
>
> spi_flash= sam_spibus_initialize(PORT); /* this call is arch dependent */
> if(!spi_flash)
> {
> /* Do something */
> }
> #ifdefined(CONFIG_MTD_M25P)
> mtd = m25p_initialize(spi_flash, MINOR);
> #elifdefined(CONFIG_MTD_GD25)
> mtd = gd25_initialize(spi_flash, MINOR);
> #elif defined(CONFIG_MTD_YOURFLASHTYPE)
> /* etc */
> #endif
> if(!mtd)
> {
> /* Do something */
> }
> #ifdefined(CONFIG_FS_LITTLEFS)
> /* Mount the LittleFS file system */
> ret = register_mtddriver("/dev/flash", mtd, 0755, NULL);
> if(ret < 0)
> {
> /* Do something */
> }
> ret = nx_mount("/dev/flash", "/mnt/flash", "littlefs", 0, "autoformat");
> if(ret < 0)
> {
> /* Do something */
> }
>
> That was a copy/paste/edit or my own code so please forgive any typo
> errors!
>
> On 28/12/2023 11:19, Janardhan Silwal wrote:
> > Hi community,
> >
> > I am trying to get littlefs running on a NOR flash memory using the MTD
> > driver, on a STM32F4 chip.
> >
> > I had some bottlenecks in the implementation as I am an out-and-out
> > novice when it comes to Nuttx.
> > I have written a custom driver for the flash, which is working with
> > MTD, as I couldn't find the exact driver for the flash installed on my
> > system.
> >
> > Now I need some guidance on where to start for linking LittleFS to MTD
> > and the rest..
> >
> > Best Regards,
> > Janardhan Silwal
> >
> >
> > --
> > B.Walter https://www.bwct.de
> > Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm.
--
B.Walter https://www.bwct.de
Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm.
NuttX on i486?
Has anyone tried to run NuttX on a physical x86 i486 machine? (I haven't tried yet. Asking first. :-) Cheers, Nathan
Re: NuttX on i486?
There is a QEMU port to the i486 under boards/x86/qemu-i486 I am not sure of the state that was left in. I don't think that has been touched for a while so I would also expect some bit rot. That port was tested on a retro hardware board. The person that developed that board reported that it worked fine. But I don't have any definitive information on that so that is not helpful. On 12/28/2023 4:58 PM, Nathan Hartman wrote: Has anyone tried to run NuttX on a physical x86 i486 machine? (I haven't tried yet. Asking first. :-) Cheers, Nathan
