V2Xe, ATMega128 SPI comm.

[tweier82]

Is it possible to communicate between the ATMega128 Microcontroller and the V2Xe compass using SPI protocol?

The V2Xe docs says it can only be a slave. The ATMega128 docs say its SPI can only receive data if it's set to slave, meaning the V2Xe would have to be a master in order to send data to the ATMega 128.

 

[melone]

Can the ATMMega128 be set to a master?

 

[tweier82]

Yes, the ATMega128 can be set to either master or slave.

I know how to set ATMega128 to master and send commands to the V2Xe, but I don't know how program the ATMega128 to receive data when the V2Xe sends it back in a separate transmission. I originally thought, set ATMega128=>slave, V2Xe=>master, but V2Xe won't do this.

 

[melone]

Set the ATM as master, and just "ask" the V2Xe for specific data. Master's recieve data! The difference between a master and a slave is that the master controls all of the communication. A slave will only respond, never begin a "conversation". The master MUST initiate "conversations".