acknowledgement for SPI

[bagavathi]

Hi friends,

How to know whether the sending data is sent or not in SPI . any other algorithm is there?

 

[barry]

SPI does not include any handshaking or acknowledgement as part of its protocol. However, it would be a simple matter in your design(depending an WHAT your actual design is) to have a slave respond to a command with an ACK or NAK. Basically, you would build the handshaking into your system, using SPI as your medium.

 

[bagavathi]

how to build handshaking signal by own? any example?

 

[barry]

What is your hardware? FPGA? Microprocessor? Since SPI doesn't have a handshaking signal you're going to have to create your own. But why wouldn't you just do it with software?

 

[bagavathi]

i have connected three microcontroller using spi.

 

[barry]

I,again, would just recommend that your upper-level software implement the Acknowledge function.