I have several devices like for example connecting with ESP8266.
I have tried to use the SPI with it with STM32F4.
First I have tried to work with SPI interrupts, the result of the communication is not stable, sometimes the communication works between both, sometimes it doesn't.
When I switched to Polling mode of STM32F4, and let EPS8266 work with interrupts, everything is stable then.
My question, why sometimes is polling works rather than interrupts ? Is it timing issue ?