AT24 is I2C and this is well supported in NuttX. AT25 is SPI and is what I have (AT25128) and it is not well supported, with no example code or boards that support it (that I can find)
From: Gregory Nutt <spudan...@gmail.com> Reply to: <dev@nuttx.apache.org> Date: Tuesday, 24 August 2021 at 20:11 To: <dev@nuttx.apache.org> Subject: Re: SPI EEPROM That’s AT24 I2C not AT25 SPI EEPROM unfortunatel, and from a quick look it “just worked” ☹ There is support for the AT24 in other SAM boards. Search for AT24 in defconfigs, I find boards/arm/samv7/same70-xplained/ boards/arm/samv7/samv71-xult/ boards/arm/xmc4/xmc4500-relax There is even simulated AT24 support: boars/sim/sim/sim You should be able to duplicate the logic from the samv7 boards.
