understanding shiftIn and shiftOut

hi all!!

i trying send data between 2 arduinos usingo shiftin , out.
i defined master pins 22 , 24 data clock , initialized outputs
then defined same pins in slave data , clock , inputs
i trying send byte master slave (value 125) slave receives it
and prints value in serial, getting 255 result.
any help?

the code master (sender) using is:

-----------------------------------------

void setup()
{
  pinmode(22,output); //-- data
  pinmode(24,output); //-- clock
}
void loop() { shiftout(22,24,msbfirst, 125);  delay(1000); }

--------------------------------------------------------

and slave (receiver):

-------------------------------------------------------------

byte dataread = 0;

void setup()
{
  pinmode(22,input); //-- data
  pinmode(24,input); //-- clock
  serial.begin(9600);
}
void loop()

{ dataread =   shiftin(22,24,msbfirst);  serial.println(dataread);   }

------------------------------------------------------------------

 

not gonna work - slave creating own clock. needs sample data based on master's clock.
try spi master/slave  here:
http://www.gammon.com.au/forum/?id=10892

Arduino Forum > Using Arduino > Networking, Protocols, and Devices (Moderator: fabioc84) > understanding shiftIn and shiftOut

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