ESP8266 Community Forum

romuye wrote:I am trying to use STM32 microcontroller as master and ESP8266 as slave for SPI communication.
But unable to get it working...
Following is my console for ESP8266 output

Could you give some information about the code you used ?
Does it work between Arduino and ESP8266 ?
Kind regards,

Vicne

Q: Could you give some information about the code you used ?
A:

1) Used following code for master ( STM32 )
http://grauonline.de/wordpress/?page_id=1004

2) Used following code for slave ( ESP8266 )
https://github.com/esp8266/Arduino/blob/master/libraries/SPISlave/examples/SPISlave_Test/SPISlave_Test.ino

Q2: Does it work between Arduino and ESP8266 ?
A: Since i do not have Arduino now, was unable to test.

Thanks,

Ooops... Looks that Ishould have read the entire thread before posting.

So I added the Vicne finding:
// Additional setting to have MISO change on falling edge
SPI1C2 |= 1 << SPIC2MISODM_S;

And now it's working (not 100% of the time, I will investigate more, surely because of the long wires connecting the 2 ESPs).

Thanks Vicne! (maybe we should put this line somewhere in the ESPSlave examples?)

Hi, all,
I just wanted to let you know I refreshed the "SPI register description" document :


Feel free to comment if you spot mistakes or have additional information.
KR,
Vicne