How to sync the master and slave in SPI configuration.

[Siddft]

Hello all,

I am doing project on PIC.

I am trying to communicating b/w 18F4550(Master) and 18F4520(Slave). Communication is happening but the data is not correct at the slave side(data slippage).
(Clock,data coming from master).

How to avoid this data slippage.


Thanks