ESP8266 Community Forum

- Sun Mar 22, 2020 7:31 am #86149 Hi, a request for information link or personal experience to an ESP8266 Register (it is referenced in various ways):

SPI_WR_STATUS()
SPI_FLASH_USER3
SPI1WS

I believe its address is 0x3FF00028 if that helps.

All the other registers seem to be frequently referenced but this one is a bit of a mystery to me at this moment. More specifically I’m interested as to what this does?

#define IOSWAP2HS 6 //Sets Two SPI Masters on HSPI

Taken from:
https://github.com/esp8266/Arduino/blob ... 266_peri.h
Line 182.

There is also a reference to the register at:
https://github.com/MetalPhreak/ESP8266_ ... register.h
Line 160.

Thanks in advance.

- Sun Apr 12, 2020 6:05 am #86465 I can say you don't need it for normal SPI operation if that helps

It probably has to do with SPI slave operation, which is even more poorly documented than master mode.

I didn't find any real information on this register as well.