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Help with info on a register please.

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


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.

Re: Help with info on a register please.

PostPosted: Sun Apr 12, 2020 6:05 am
by eriksl
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.