主振荡器无法在PIC32MZ0512EFE064上启动

大家好，在PIC32MZ0512EFE064中用8MHz晶体配置振荡器有问题。开始时，我注意到PIC打开BFRC(Back-Up Fast RC)振荡器，设置CF标志(时钟故障检测位)。因此我禁用了BFRC，现在PIC没有启动，如我所料。我用示波器检查了信号，什么也没出现，OSC2管脚上只有500mV的余弦，OSC1管脚上只有0V。即使用PIC32MZ2048EFH100在另一块板上，问题仍然存在，所以我认为问题不是硬件。我试图改变连接到晶体（22PF和27 PF）的电容值，但没有。有人能帮助我吗？为什么水晶不起作用？遵循我的代码和图片的连接布局和水晶的示意图。



      以下为原文

    Hello everyone,
I have a problem configuring the oscillator in a PIC32MZ0512EFE064 with a 8MHz crystal.
Initially, at startup I noticed that the PIC switches on the BFRC (Back-Up Fast RC) oscillator setting the CF flag (Clock Fail Detect bit). So I disabled the BFRC and now the PIC doesn’t start, as I expected.
I checked the signal with oscilloscope and nothing appears, only 500mV costant on the OSC2 pin and 0V on the OSC1 pin.
The problem persist even on another board with a PIC32MZ2048EFH100, so I think that the problem is not hardware.
I tried to change the value of capacitors connected to the crystal (22pF and 27pF) but nothing.
Can anyone help me? Why the crystal doesn’t works?
Following my code and the pictures of the connection layout and schematic of the crystal.

#include
#include
#include
#include

//// DEVCFG3
//// USERID = No Setting
#pragma config FMIIEN = OFF // Ethernet RMII/MII Enable (RMII Enabled)
#pragma config FETHIO = OFF // Ethernet I/O Pin Select (Alternate Ethernet I/O)
#pragma config PGL1WAY = OFF // Permission Group Lock One Way Configuration (Allow multiple reconfigurations)
#pragma config PMDL1WAY = OFF // Peripheral Module Disable Configuration (Allow multiple reconfigurations)
#pragma config IOL1WAY = OFF // Peripheral Pin Select Configuration (Allow multiple reconfigurations)
#pragma config FUSBIDIO = OFF // USB USBID Selection (Controlled by Port Function)
//
//// DEVCFG2
#pragma config FPLLIDIV = DIV_1 // System PLL Input Divider (1x Divider)
#pragma config FPLLRNG = RANGE_5_10_MHZ // System PLL Input Range (5-10 MHz Input)
#pragma config FPLLICLK = PLL_POSC // System PLL Input Clock Selection (POSC is input to the System PLL)
#pragma config FPLLMULT = MUL_20 // System PLL Multiplier (PLL Multiply by 20)
#pragma config FPLLODIV = DIV_2 // System PLL Output Clock Divider (2x Divider)
#pragma config UPLLFSEL = FREQ_24MHZ // USB PLL Input Frequency Selection (USB PLL input is 24 MHz)
//
//// DEVCFG1
#pragma config FNOSC = POSC // Oscillator Selection Bits (System POSC)
#pragma config DMTINTV = WIN_127_128 // DMT Count Window Interval (Window/Interval value is 127/128 counter value)
#pragma config FSOSCEN = OFF // Secondary Oscillator Enable (Disable SOSC)
#pragma config IESO = OFF // Internal/External Switch Over (Disabled)
#pragma config POSCMOD = HS // Primary Oscillator Configuration (HS osc mode)
#pragma config OSCIOFNC = OFF // CLKO Output Signal Active on the OSCO Pin (Disabled)
#pragma config FCKSM = CSECMD // Clock Switching and Monitor Selection (Clock Switch Enabled, FSCM Disabled)
#pragma config WDTPS = PS1048576 // Watchdog Timer Postscaler (1:1048576)
#pragma config WDTSPGM = STOP // Watchdog Timer Stop During Flash Programming (WDT stops during Flash programming)
#pragma config WINDIS = NORMAL // Watchdog Timer Window Mode (Watchdog Timer is in non-Window mode)
#pragma config FWDTEN = OFF // Watchdog Timer Enable (WDT Disabled)
#pragma config FWDTWINSZ = WINSZ_25 // Watchdog Timer Window Size (Window size is 25%)
#pragma config DMTCNT = DMT31 // Deadman Timer Count Selection (2^31 (2147483648))
#pragma config FDMTEN = OFF // Deadman Timer Enable (Deadman Timer is disabled)
//
//// DEVCFG0
#pragma config DEBUG = OFF // Background Debugger Enable (Debugger is disabled)
#pragma config JTAGEN = OFF // JTAG Enable (JTAG Disabled)
#pragma config ICESEL = ICS_PGx2 // ICE/ICD Comm Channel Select (Communicate on PGEC2/PGED2)
#pragma config TRCEN = OFF // Trace Enable (Trace features in the CPU are disabled)
#pragma config BOOTISA = MIPS32 // Boot ISA Selection (Boot code and Exception code is MIPS32)
#pragma config FECCCON = OFF_UNLOCKED // Dynamic Flash ECC Configuration (ECC and Dynamic ECC are disabled (ECCCON bits are writable))
#pragma config FSLEEP = OFF // Flash Sleep Mode (Flash is powered down when the device is in Sleep mode)
#pragma config DBGPER = ALLOW_PG2 // Debug Mode CPU Access Permission (Allow CPU access to Permission Group 2 permission regions)
#pragma config SMCLR = MCLR_NORM // Soft Master Clear Enable bit (MCLR pin generates a normal system Reset)
#pragma config SOSCGAIN = GAIN_2X // Secondary Oscillator Gain Control bits (2x gain setting)
#pragma config SOSCBOOST = OFF // Secondary Oscillator Boost Kick Start Enable bit (Boost the kick start of the oscillator)
#pragma config POSCGAIN = GAIN_1X // Primary Oscillator Gain Control bits (2x gain setting)
#pragma config POSCBOOST = ON // Primary Oscillator Boost Kick Start Enable bit (Boost the kick start of the oscillator)
#pragma config EJTAGBEN = NORMAL // EJTAG Boot (Normal EJTAG functionality)
//
//// DEVCP0
#pragma config CP = OFF // Code Protect (Protection Disabled)

int i;

#define LED_SEND_DATA LATEbits.LATE7

void Init_System(void);
void Delay_ms(unsigned int);

void Init_System(void)
{
    // Set port's sygnals as digital
    ANSELB = 0x00000000;
    ANSELE = 0x00000000;
    ANSELG = 0x00000000;

    // Set Input=1/Output=0
    TRISB = 0xFFFFFFFF;
    TRISC = 0xFFFFFFFF;
    TRISD = 0xFFFFFFFF;
    TRISE = 0xFFFFFFFF;
    TRISF = 0xFFFFFFFF;
    TRISG = 0xFFFFFFFF;
   
    // Set STDOUT on UART1
    __XC_UART = 1;
   
    // Disable all Interrupts
    __builtin_disable_interrupts();
   
    // Set Peripheral Bus 2 Clock to SYSCLK/DIV_4
    SYSKEY = 0x00000000; // Start unlock sequence
    SYSKEY = 0xAA996655;
    SYSKEY = 0x556699AA;
    while (PB2DIVbits.PBDIVRDY == 0)
        ;
    PB2DIVbits.PBDIV = GetSystemClock() / GetPeripheral2Clock() - 1;
    PB2DIVbits.ON = 1;
    SYSKEY = 0x33333333;
   
    // Configure Interrupt Controller for Multi-Vector Mode
    PRISS = 0x76543210;
    INTCONSET = _INTCON_MVEC_MASK; // Set the MVEC bit
   
    // Enable all Interrupts
    __builtin_enable_interrupts();
   
}

void Delay_ms(unsigned int delay)
{
    _CP0_SET_COUNT(0);
    register unsigned int waitCnt = delay * ((GetSystemClock() / 2) / 1000);
    while(_CP0_GET_COUNT() < waitCnt);
}

main()
{
    Init_System();


    TRISEbits.TRISE7 = 0; // LED_SEND_DATA

    while(true)
    {
        LED_SEND_DATA = ~LED_SEND_DATA;
        Delay_ms(1000);
    }
}


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