Reading and writing SDRAM Arduino Portenta H7

[mfusco]

Hello,

I'm inquiring in regard to reading/writing to the Arduino Portenta H7 SDRAM. I found this which has some information but I'm having trouble understanding it, and I'm not sure if it both reads and writes. As of now, I think I only need to store a boolean and a string, but I need the data to remain in memory even if a new sketch is uploaded, or if the board is reset.

Any help would be greatly appreciated. Thank you.

Edit: I've discovered that there is a SDRam library:

Portenta - Usage of SDRAM.h library

According to the datasheet, the Arduino Portenta has 8MB of SDRAM. I did not found any official documentation how to access these. I found a post on stackexchange, where the usage of the SDRAM.h library is recommended. With the following sketch I'm trying to test this. But I don't get the results back that I'm writing to the sdram #include <SDRAM.h> #define file_size 512 SDRAMClass ram; byte * file; void setup() { SerialUSB.begin (9600); while (!SerialUSB) ; ram.begin(); file = …

Storing data in Arduino Portenta H7's SDRAM

But I haven't found any documentation. I see functions such as .begin() and .malloc() but I'm not sure how to implement it for what I need.