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 :)
