Hi Tim, The process to get AT25 SPI is similar, but for SPI you need to get the CS pin configure besides the other four SPI pins.
Is this your first time using SPI on NuttX? There are some tutorials at NuttX Channel explaining how to use SPI on NuttX, like using SDCard over SPI. I suggest you to start with a board that has everything in place already, like the STM32F4Discovery or BluePill (stm32f103-minimum). Also the guys from MicroROS wrote a more technical tutorial about how SPI works on NuttX: https://github.com/micro-ROS/NuttX/issues/29 There is not theoretical class of swimming, you need to enter in the water, just start in the shallow place: stm32 + sdcard spi for example. BR, Alan On 8/24/21, Tim Hardisty <t...@jti.uk.com.invalid> wrote: > That’s AT24 I2C not AT25 SPI EEPROM unfortunatel, and from a quick look it > “just worked” ☹ > > > > > > > > From: Alan Carvalho de Assis <acas...@gmail.com> > Reply to: <dev@nuttx.apache.org> > Date: Tuesday, 24 August 2021 at 18:01 > To: <dev@nuttx.apache.org> > Subject: Re: SPI EEPROM > > > > Hi Tim, > > > > You are right, Documentation is one of our "Achilles tendon". > > > > But, of course, some times it is also the user search fault, maybe > > they don't have the Google-fun skills yet (please don't take it as > > personal). > > > > If you search for NuttX EEPROM Tutorial > > > > It will returns this tutorial: > > > > https://www.youtube.com/watch?v=qzjf2JtgYN0 > > > > Please get us to improve this situation, write a tutorial at: > > nuttx/Documentation/guides/ about it. > > > > BR, > > > > Alan > > > > On 8/24/21, Tim <t...@jti.uk.com.invalid> wrote: > > The more time I spend with nuttx the more I think I just haven't found some > > treasure trove of documentation somewhere. All I seem to end up doing is > > searching every single file for some kind of clue as to what to do! > > > > > > > > I have an SPI EEPROM device. Menuconfig allows me to set it up, lovely! I > > end up with > > > > CONFIG_EEPROM=y > > > > CONFIG_SPI_EE_25XX=y > > > > > > > > (Also SPI mode and frequency). > > > > > > > > Now what.. > > > > > > > > If I search for either of those CONFIG parameters, the first is not > > referenced anywhere (apart from my .config), the second confirms that it > > will include spi_xx25xx.c as a source. Getting there.. > > > > > > > > It'll be ee25xx_initialize(FAR struct spi_dev_s *dev, FAR char *devname, > > int > > devtype, int readonly) I need to call - makes sense. > > > > > > > > Only there is no explanation, or examples of, how to make that call, and a > > Google search doesn't help either. > > > > > > > > Next step will be to look for examples of spi_dev_s and see if I can deduce > > it somehow. > > > > > > > > Just how am I supposed to know how to call that initialisation code? Which > > is why I started this question with the observation that surely I must be > > missing something somewhere!!?? > > > > > > > > Yes, it's a bit of a whinge, but also a request for help..please :) > > > > > > > >
