在PIC32MZ上读取带有ADC的AN12不会完成转换

IM试图在PIC32 MZ2048 EFM064上进行AN12（RG8）的单个ADC测量（在启动时）。我已经通过例子22.3工作了，但我还没有任何运气，我还没有找到任何MZ具体的例子。我的记忆力很强。（这是在Bootloader中使用的）所以我不想真正包含Orthor或PiBi，不需要做一个特别的累积读取（+/- 10%就可以了）。这个代码是基于示例22-3的东西卡在ADCI读（）中，它从来没有完成。虽然（ADCDSTAT1BITS ARDY0＝0），但我确信我的触发设置错误。关于什么需要修理的任何建议。



      以下为原文

    Im attempting to make a single ADC measurement ( at startup ) of AN12 ( RG8 ) on a PIC32MZ2048EFM064.  I've been workign through Example 22.3 but as yet i'm not having any luck, and i've not been able to find any MZ specific examples.    I'm quite memory constrained. ( this is for use in a bootloader ) so i dont' really want to have to include hARMony or plib
I'm not needing to make a particaully accruate reading ( +/- 10% will be fine ).   This code is based on Example 22-3

things get stuck in adc_read()  its never finishing..   
while(ADCDSTAT1bits.ARDY0 == 0);

Im pretty sure i've got my triggering set up wrong.   

Any suggestions as to what needs fixing.

void initADC()
{
         
        /* Configure ADCCON1 */
        ADCCON1 = 0; // No ADCCON1 features are enabled including: Stop-in-Idle, turbo,
                        // CVD mode, Fractional mode and scan trigger source.
        ADCCON1bits.SELRES = 3; // ADC7 resolution is 12 bits
        ADCCON1bits.STRGSRC = 1; // Select scan trigger.

        /* Configure ADCCON2 */
        ADCCON2bits.SAMC = 5; // ADC7 sampling time = 5 * TAD7
        ADCCON2bits.ADCDIV = 1; // ADC7 clock freq is half of control clock = TAD7

        /* Initialize warm up time register */
        ADCANCON = 0;
        ADCANCONbits.WKUPCLKCNT = 5; // Wakeup exponent = 32 * TADx

        /* Clock setting */
        ADCCON3bits.ADCSEL = 0; // Select input clock source
        ADCCON3bits.CONCLKDIV = 1; // Control clock frequency is half of input clock
        ADCCON3bits.VREFSEL = 0; // Select AVDD and AVSS as reference source
        ADC0TIMEbits.ADCDIV = 1; // ADC0 clock frequency is half of control clock = TAD0
        ADC0TIMEbits.SAMC = 5; // ADC0 sampling time = 5 * TAD0
        ADC0TIMEbits.SELRES = 3; // ADC0 resolution is 12 bits

        /* Select analog input for ADC modules, no presync trigger, not sync sampling */
        ADCTRGMODEbits.SH0ALT = 0; // ADC0 = AN0
        
        /* Select ADC input mode */
        ADCIMCON1bits.SIGN0 = 0; // unsigned data format
        ADCIMCON1bits.DIFF0 = 0; // Single ended mode
        ADCIMCON1bits.SIGN8 = 0; // unsigned data format
        ADCIMCON1bits.DIFF8 = 0; // Single ended mode
      

        /* Configure ADCGIRQENx */
        ADCGIRQEN1 = 0; // No interrupts are used.
        ADCGIRQEN2 = 0;
        
        /* Configure ADCCSSx */
        ADCCSS1 = 0; // Clear all bits
        ADCCSS2 = 0;
        ADCCSS1bits.CSS12 = 1; // AN12 (Class 2) set for scan
        
        /* Configure ADCCMPCONx */
        ADCCMPCON1 = 0; // No digital comparators are used. Setting the ADCCMPCONx
        ADCCMPCON2 = 0; // register to '0' ensures that the comparator is disabled.
        ADCCMPCON3 = 0; // Other registers are ‘don't care’.
        ADCCMPCON4 = 0;
        ADCCMPCON5 = 0;
        ADCCMPCON6 = 0;

        /* Configure ADCFLTRx */
        ADCFLTR1 = 0; // No oversampling filters are used.
        ADCFLTR2 = 0;
        ADCFLTR3 = 0;
        ADCFLTR4 = 0;
        ADCFLTR5 = 0;
        ADCFLTR6 = 0;

        /* Set up the trigger sources */
        ADCTRG3bits.TRGSRC8 = 3; // Set AN12 (Class 2) to trigger from scan source

        /* Early interrupt */
        ADCEIEN1 = 0; // No early interrupt
        ADCEIEN2 = 0;

        /* Turn the ADC on */
        ADCCON1bits.ON = 1;

        /* Wait for voltage reference to be stable */
        while(!ADCCON2bits.BGVRRDY); // Wait until the reference voltage is ready
        while(ADCCON2bits.REFFLT); // Wait if there is a fault with the reference voltage

        /* Enable clock to analog circuit */
        ADCANCONbits.ANEN0 = 1; // Enable the clock to analog bias ADC0
        ADCANCONbits.ANEN7 = 1; // Enable, ADC7

        /* Wait for ADC to be ready */
        while(!ADCANCONbits.WKRDY7); // Wait until ADC7 is ready

        /* Enable the ADC module */
        ADCCON3bits.DIGEN7 = 1; // Enable ADC7
}

uint32_t adc_read()
{
            ADCCON3bits.GSWTRG = 1; // Start software trigger
            while(ADCDSTAT1bits.ARDY0 == 0); // Wait until the measurement run
            return ADCDATA12; // Return with measured data
}