Hey, I’ve read https://community.spark.io/t/sqlite-inside-spark/248/8 and I’m trying to figure out how do I write and read (code-wise) from that spare memory (external flash, about 1.5M free for use). Is there an example for it?

@dorongutman , thanks for the question. Right now, it’s not possible to write to external flash through the standard web IDE. We’ve got a task in the backlog to create libraries for writing directly to external flash, but it’s not yet implemented. In the meantime, if you are an advanced user and w…

@will Is it SPI flash? Which (unexposed) pins are MOSI, MISO, SCLK and SS on? I’m sure I could whip something up to get it rolling. It’s almost required for this OLED display I’m writing a library for.

Hey @will , thanks for the answer. It doesn’t give me the access I was hoping for (via a library/method), but at least I know it’s in the works. I don’t see myself hacking away at the register addresses in the mapping you provided at this point.

@timb Yes, its an SPI flash . Make sure you don’t write over the reserved regions!

Yup, I’ve seen that. I just need to know how exactly it’s connected up to the STM32! :slight_smile: You guys are already obviously using it, so I’m sure it’s in the code somewhere. It wouldn’t be too hard to make it user accessible from there.

Hey guys, Any update on this front?? Thanks

Not officially supported yet, but if you want to live on the edge: [image] Let's get (non)volatile Firmware One option is to use the external flash; the Core has 2MB of external flash, of which we’re only using 0.5MB, and the …

I want to use this as well for my LCD project. One thought that did come up was this: Lets say they add the functions to write and read from flash memory user area. Lets also say that we are going to be storing a large amount of data (1meg). It seems that we are going to need to write another app…

seulater, I totally agree, like a “loader” app. I don’t believe DFU-Util can do that directly so we need an app, both on the Spark (to receive and flash) and on a PC (to prepare and send). Not sure how the “image” will be created as I suspect it will contain images/icons/sprites and fonts. I would…

dfu-util can write directly to the flash if I’m not mistaken. It shows up when you list devices and I believe @mohit or @Dave said it worked. Instead of writing a loader app to do it over serial, you could convert your data to a C Array of bytes and store it one chunk at a time as a const in a sket…

Using the external flash memory

Firmware

zach January 21, 2014, 4:56am 8

Not officially supported yet, but if you want to live on the edge:

Topic		Replies	Views
Spark CLI Flash Memory uncategorized	10	2384	August 13, 2014
Let's get (non)volatile Firmware	75	12370	July 3, 2014
Is there a way to store data locally in flash Libraries	10	6453	October 9, 2015
Flashing external Flash Over The Air? General	10	2685	January 26, 2015
External flash usage Firmware	3	1749	October 6, 2017

Using the external flash memory

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