Sending data to Master from Slave in SPI

Projects Networking, Protocols, and Devices
1

Hi,
I have attached two Arduino using SPI protocol. I have successful in sending data from Master to Slave via SPI.

But i am not getting a way that how we can send data from Slave to Master. Please help me with some sample code.

Thanks.

2

Please help me with some sample code.

There is sample code that comes with the SPI library.

Usually, one registers a callback function on the slave. That function gets called when the master sends data. In the callback function, use Wire.write() to send data back to the master.