Nano RP2040 & LittleFS_Mbed_RP2040 mount size

Official Hardware Nano Family Nano RP2040 Connect
1

Hey y'all, I've had some success with writing to and reading from the Nano RP2040's flash memory using the LittleFS_Mbed_RP2040 library, but I seem to brick it every time I set the size of the mount > 1500 kB.

I'm a little confused since the datasheet mentions a 16MB flash memory. Am I doing something wrong? Is there another library I should be using? Is it even possible to use more of that 16MB memory?

Here's some sample code that bricked my RP2040:

#define _LFS_LOGLEVEL_          1
#define RP2040_FS_SIZE_KB       2000
#define FORCE_REFORMAT          false

#include <LittleFS_Mbed_RP2040.h>
LittleFS_MBED *myFS;
char fileName[] = MBED_LITTLEFS_FILE_PREFIX "/logFile.txt";

void setup() {
  Serial.begin(9600);
  while (!Serial){
    delay(100);
  };

  myFS = new LittleFS_MBED();
  if (!myFS->init()){
    Serial.println("LITTLEFS Mount Failed");
    while (1){}
  } else{
    Serial.println("LITTLEFS Mount Successful");
  }

}

void loop() {
  Serial.println("Not stuck");
  delay(1000);
}
2

16MB is the maximum supported flash memory. RP2040 based devices are often built with 2 MByte flash. The number "16" on the flash chip (read the text on the chip and search for datasheet) is usually 16 Mbit, that is 2 Mbytes. That might explain why it bricks with >1500 kbyte filesystem (especially with 2000, that consumes almost all of 2048 kbytes).