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MSP430fr5989管脚复用输出功能

请教一下,这款芯片管脚复用输出,怎么设置,用库函数
要使P5.2管脚输出ACLK。怎么通过GPIO_setAsPeripheralModuleFunctionOutputPin()这个库函数设置啊。

我设置了并没有输出啊

void main(void)
{
  WDT_A_hold(WDT_A_BASE);
  PMM_unlockLPM5();
//  system_clock_init();
//  CS_setDCOFreq(CS_DCORSEL_1, CS_DCOFSEL_2);
//  GPIO_setAsOutputPin(GPIO_PORT_P5,GPIO_PIN2);
//  GPIO_setOutputHighOnPin(GPIO_PORT_P5,GPIO_PIN2);
//  CS_setExternalClockSource(32768, 0);
  GPIO_setAsPeripheralModuleFunctionOutputPin(GPIO_PORT_P5,GPIO_PIN2,GPIO_TERNARY_MODULE_FUNCTION );
  GPIO_setAsOutputPin(GPIO_PORT_P5,GPIO_PIN3);
  while(1)
  {
    GPIO_toggleOutputOnPin(GPIO_PORT_P5,GPIO_PIN3);
    __delay_cycles(100000);
  }

}