Good Morning,
I've this scenario i need to use arduino uno set like slave in SPI communication. I need to read data on MASTER from Arduino, modify it and then write back data into the master. Right now I've seen the documentation for SPI without success. From the master is not present a SS pin. is I've see that
SPI.setBitOrder(MSBFIRST); // MSB
SPI.setDataMode(SPI_MODE0); // CLOCK POLARITY "rising edges"
Also I'm able to find for a master the SPI CODE, is a week that I try to find out without success (maybe can be omitted ?)
Using like pin 11,12,13 I've see with oscilloscope that the clock signal send from the master is reduce a lot of into the pin 13, I i try to change pin I see the signal very clear from the master ...
Please help me the documentation is not much complete, could you help kindly me ?
Thanks
Andrea