Ring / Circular buffer + write to own flash?

[rkertesz]

I'm wondering if you know of a library or method to use the write to flash to buffer data but to do so in a way that can allow me to do so in an addressable circular buffer?

[MCUdude]

Hi!

I don't know any libraries or functions that can do that. I don't have much experience with circular buffers in general, other than that the Arduino Serial interface uses a circular buffer, and that it's quite useful for certain applications.

Care to explain why you would need to use the flash memory as a circular buffer, and what the use-case is? Maybe I'm able to point you in the right direction 👍 Also, you're thinking about a circular buffer living in RAM, right?

If you utilize the Flash.h library, you'll typically have a buffer as big as a flash page size you can do whatever you want with.

[rkertesz]

I'm thinking of using the flash. The example is as a datalogger where each new reading is available at a different address and we use one read pointer and one write pointer. Thr device can take a reading every 5 minutes and advance the write pointer each time. We can interrogate the device every hour and then read each measurement/timestep, progressing from the start address of the read pointer up until readptr matches writeptr. If we fail to interrogate for a long long time, the write pointer rolls over and starts overwriting old readings.

So basically the use case is a datalogger.

I'll have a looks at some datalogger examples and see if they employ circular buffers in flash

Thank you!

[rkertesz]

realized that EEPROM has plenty more writes than flash and there are a few EEPROM ring buffers out there