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<timhardist...@gmail.com>
Sent: Thursday, December 28, 2023 19:15
To:dev@nuttx.apache.org <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<timhardist...@gmail.com>
Sent: Thursday, December 28, 2023 17:31
To:dev@nuttx.apache.org <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
