SPI中断标志置位但不触发

你的设置是什么？如果你不使用中断，代码会工作吗？



      以下为原文

   
What are your settings? Does the code work if you aren't using interrupt? 

你的设置是什么？如果你不使用中断，代码会工作吗？这是事前相关的事情：我确实试着把样本扔进SPIPUF4，我没有看到它的输出，但是可能有多个原因。现在我将注意力放在中断上，通过调试器看这个问题，它似乎认为它正在传输：在将两个样本加载到SPIPUF4之后，TxBuFelm＝2，然后它变为零。但是我得到的是，在启用SPI4之后，标志就被设置好了，但是它并没有向ISR提供向量。有一件事我不是很自信的是中断优先级和ISR的语法，但我相信我在那里很好。



      以下为原文

   
What are your settings? Does the code work if you aren't using interrupt? 




Here's what happens that is relevant beforehand:
 
INTCONbits.MVEC = 1;
__builtin_enable_interrupts();
RPD3R = 8; //sdo4
RPD4R = 8; //ss4


SPI1BRG = 3;
SPI4CONbits.MSSEN = 1;
SPI4CONbits.ENHBUF = 1;
SPI4CONbits.MCLKSEL = 1;
SPI4CONbits.MODE16 = 0;
SPI4CONbits.MODE32 = 0;
SPI4CONbits.SMP = 0;
SPI4CONbits.SSEN = 1;
SPI4CONbits.MSTEN = 1;
SPI4CONbits.DISSDI = 1;
SPI4CONbits.DISSDO = 0;
SPI4CONbits.STXISEL = 0b10; //interrupt when buffer half empty
SPI4CON2bits.AUDEN = 1;
SPI4CON2bits.AUDMOD = 0x01;
 
IFS5CLR = _IFS5_SPI4TXIF_POSITION | _IFS5_SPI4RXIF_POSITION | _IFS5_SPI4EIF_POSITION;
IPC40bits.SPI4EIP = 6;
IPC40bits.SPI4EIS = 3;
IEC5bits.SPI4TXIE = 1;

SPI4CONbits.ON = 1;
 
  while(1);
 
I did try throwing samples into SPIBUF4 and am not seeing it on the output, but there could be multiple reasons for that. I'm concentrating on the interrupt now, and looking at this through the debugger, it seems to think it's transmitting it: Immediately after loading two samples into SPIBUF4, TXBUFELM=2, then afterwards it goes to zero. But what gets me is the flag is getting set right after enabled SPI4, yet it doesn't vector to the ISR. One thing I'm not fully confident on is interrupt priority levels and the syntax for the ISR, but I believe I'm good there. 
 
 
 
 

嗯，我不能解释你的症状，因为我看不到你的其他代码，但这不做你明显想要的底线：我想知道你用过多少其他地方，你应该使用的位置，Mask问候，戴夫。



      以下为原文

    Hmmm...
I can't explain your symptoms since I can't see the rest of your code, but this doesn't do what you obviously intend

Bottom line: I'm wondering how many other places you used _POSITION where you should have used _MASK
 
Regards,
 
Dave

这设置了SPI4故障中断的优先级。SPI4-TX中断优先级在IPC41，戴夫也这么说。



      以下为原文

        IPC40bits.SPI4EIP = 6;
    IPC40bits.SPI4EIS = 3;

This sets the priority for the SPI4 Fault interrupt. The SPI4 TX interrupt priority is in IPC41.
Also, what Dave said.

底线：我想知道有多少其他地方你使用的位置，你应该使用的Mask问候，DaveOh好发现。我把它们改成了面具。但仍然没有向ISR引导：



      以下为原文

   
Bottom line: I'm wondering how many other places you used _POSITION where you should have used _MASK
 
Regards,
 
Dave



Oh good find. I changed those to _MASK as they should be. But still not vectoring to ISR :(

哎呀！就是这样。我完全忽略了这一点。



      以下为原文

   


Yay! That was it. I completely overlooked that.