PIC24FJGA704上的SPI似乎不起作用

MPLAB X IDE V4.05XC16 V1.33 PIC24FJ64 GA704I已经做了PIC24多次，但刚刚开始与新的部分PIC24FJ64 GA704。SPI似乎不起作用。当我在调试中运行时，SPI寄存器都是0，即使我把它们设置为一个值。IOOKO是明确的，所以IO映射是可以的，但是这不应该影响控制寄存器。在调试器中，如果您查看SFRS并将格式设置为外围设备，SPI外设不会出现在列表中。有什么想法吗？init代码：//设置SPI1作为32位3.2MHz发送器SPI1CONL1BI. SPIN＝0；//禁用模块奥登RP5R＝7；//分配SDO1到RB5/RP5 IPC2BITS SPI1TXIP P＝4；SPI1STATLBITS.SPROROV＝0；//清除溢出SPI1CON1H1= 0x2000；//＝0πSPI1BRGL= 0x004；/ /生成3.2MHz比特率SPI1CON1L= 0x063D、/ / 32位、SDI禁用、SCK禁用、MCLK、增强缓冲器、SPI1IMSKLBITS、SPITBEN＝1；/SPI1发送缓冲器空生成中断EvTeNEC0BITS。SPI1TCHY＝1；/ /启用中断SPI1CONLITS。SPIN＝1；



      以下为原文

    MPLAB X IDE v4.05
XC16 v1.33
PIC24FJ64GA704

I have done PIC24 many times but just started with a new part PIC24FJ64GA704.  The SPI does not seem to work.  When I run in debug the SPI registers are all 0 even after I set them to a value.  IOLOCK is clear so IO mapping is ok, but this should not effect the control registers.

Also in the debugger if you look at the SFRs and set the format to Peripherals the SPI peripherals do not show up in the list.

Any Ideas?

Init Code:
// set up SPI1 as 32 bit 3.2Mhz sender
SPI1CON1Lbits.SPIEN = 0; // disable module
_RP5R = 7; // assign SDO1 to RB5/RP5
IPC2bits.SPI1TXIP = 4;
SPI1STATLbits.SPIROV = 0; // clear the Overflow
SPI1CON1H = 0x2000; // AUDEN=0
SPI1BRGL = 0x0004; // to generate 3.2MHz bit rate
SPI1CON1L = 0x063D; // 32 bit, SDI disabled, SCK disabled, MCLK, Enhanced buffer,
SPI1IMSKLbits.SPITBEN = 1; // SPI1 transmit buffer empty generates interrupt event
IEC0bits.SPI1TXIE = 1; // Enable interrupts
SPI1CON1Lbits.SPIEN = 1;