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crystal oscillator XSOC not stablising

Other Parts Discussed in Thread: CC2520, MSP430F5438A

i am trying to do rf communication between two nodes(msp430f5438a+cc2520).

i have tried using the code for smartrf05eb+cc2520 and tried to port on msp430f5438experimeter board+cc2520.

i have made changes with respect to port and pins..

no errors are coming but i am stucking at the following code

static uint8 halRfWaitRadioReady(void)
{
uint8 i;

// Wait for XOSC stable to be announced on the MISO pin
i= 100;
CC2520_CSN_OPIN(0);
while (i>0 && !CC2520_MISO_IPIN) {
halMcuWaitUs(10);
--i;
}

CC2520_CSN_OPIN(1);

return i>0 ? SUCCESS : FAILED;

}

it is always returning failed.it should not enter while loop.but it is entering.

RF is not initiating

what can i do to stabilize the XSOC.

thanks in advance

pratap y