时钟从FRC切换到主振荡器但它被困在while循环中

嗨，我有DSPIC33 EP128GS808 DEV板。我正试着把时钟从FRC切换到主振荡器，但是它被困在while循环中。我忘记安装什么了吗？这里是振荡器设置：这是保险丝设置：



      以下为原文

    Hi,

I have the dsPIC33EP128GS808 dev board.
I'm trying to switch the clock from FRC to Primary oscillator, but its getting stuck at the while loop.

Is there something I forgot to setup up?

Here's the oscillator setup:

    /* Configure PLL prescaler, PLL postscaler, PLL divisor */
    /* External Crystal Configuration */
    PLLFBD = 54; /* M = PLLFBD + 2 */
    CLKDIVbits.PLLPRE = 6; /* N1 = PLLPRE + 2 */
    CLKDIVbits.PLLPOST = 0; /* N2 = 2 * (PLLPOST + 1) */
    /* Change oscillator to Primary Oscillator + PLL */
    __builtin_write_OSCCONH(0x03); /* New Oscillator Primary w/ PLL */
    __builtin_write_OSCCONL(0x01); /* Enable Clock Switch */
    while (OSCCONbits.COSC != 0x03); /* Wait for new Oscillator to become Primary w/ PLL */
    while (OSCCONbits.LOCK != 1); /* Wait for Pll to Lock */

    ACLKCONbits.ASRCSEL = 0;
    ACLKCONbits.FRCSEL = 1; /* FRC is input to Auxiliary PLL */
    ACLKCONbits.SELACLK = 1; /* Auxiliary Ocillator provides clock source for PWM */
    ACLKCONbits.APSTSCLR = 0b111; /* Divide Auxiliary clock by 1 */
    ACLKCONbits.ENAPLL = 1; /* Enable Auxiliary PLL */
    while (ACLKCONbits.APLLCK != 1) /* Wait for Aux. PLL to Lock


Here's the fuse setup:
// FOSCSEL
#pragma config FNOSC = FRC // Oscillator Source Selection (Internal Fast RC (FRC))
#pragma config IESO = ON // Two-speed Oscillator Start-up Enable bit (Start up device with FRC, then switch to user-selected oscillator source)

// FOSC
#pragma config POSCMD = HS // Primary Oscillator Mode Select bits (HS Crystal Oscillator Mode)
#pragma config OSCIOFNC = OFF // OSC2 Pin Function bit (OSC2 is clock output)
#pragma config IOL1WAY = OFF // Peripheral pin select configuration bit (Allow multiple reconfigurations)
#pragma config FCKSM = CSDCMD // Clock Switching Mode bits (Both Clock switching and Fail-safe Clock Monitor are disabled)
#pragma config PLLKEN = ON_PLL // PLL Lock Enable Bit (Clock switch to PLL source will wait until the PLL lock signal is valid)