The datasheets for the Argon, Boron, and Xenon show an on-board additional 4MB SPI flash, if I’m not mistaken wasn’t this originally 2MB? More importantly, do we have access to this 4MB SPI flash? All of it, some of it? How do we access it? I know the Photon and Electron have the EEPROM libary w…

There has been an update post on the improved QSPI flash and yes it is supposed to be accessible. [image] Particle Mesh is shipping: everything you need to know Upgraded flash memory We upgraded the flash memory available on each Particle Mesh device by adding a whopping 4MB of external flash w…

The mesh devices support the same EEPROM calls as before. However, the virtual EEPROM is 4 K bytes Also, internally it’s not implemented as two flash sectors; it’s just a file in the littlefs file system, which uses a portion of the external QSPI flash.

The question now is how to access the remaining 3.9MB of flash?

The vast majority of the external QSPI flash is reserved: External SPI Flash Layout Overview (DFU offset: 0x80000000) OTA (1500KB, @0x00289000) Reserved (420KB, @0x00220000) FAC (128KB, @0x00200000) (that’s the factory backup user firmware image) LittleFS (2M, @0x00000000) It is possible in th…

Thanks for the information but as you said earlier the EEPROM calls are implemented as file in the littlefs file system so why not simply increase the file size so the EEPROM is bigger?

So out of the 4 MB QSPI, there is no memory available for user data storage?

@rickkas7 Can I get a update on when we will have access to some of the QSPI Memory on the Gen3 Devices? I hear its coming up soon and I’m needing it.

The POSIX file system is available in 2.0.0-rc.1 for Boron and Argon. The documentation for it has not been turned on for these devices yet, but if you set the device type in the upper left corner of the Firmware API reference to Tracker SoM the POSIX file system API will appear until the 2.0.0 docu…

Thanks for the update! This is exciting news :grinning: @peekay123 @ScruffR Did you guys know about this?

On-board 4MB SPI flash

Connectivity BLE // NFC

tve March 12, 2019, 4:44pm 8

There’s a 2MB LittleFS filesystem. See Access to littlefs?

Importing compressed binary file

Topic		Replies	Views
Access 4MB SPI flash Firmware boron , argon	4	1090	August 6, 2020
Particle Mesh - available program space and RAM BLE // NFC	12	1709	May 16, 2019
LittleFS & EEPROM Firmware	4	1364	February 5, 2021
Photon flash memory expansion General	3	513	August 1, 2019
How to use QSPI Flash on Boron Libraries boron	23	873	October 4, 2023

On-board 4MB SPI flash

Related topics