the PIC16F18426+旋转编码器+LCD1602A problem, please help! (RESOLVED)

幸运的是，你感觉到了任何变化。我猜你试着从一个更老的PIC中修改一些“更改代码”。你正在检查错误的位。使用LATX寄存器进行输出，PORTX寄存器用于输入。因此，您应该摆脱的唯一原因是由于这种虚假的指令，在这个PIC中，IOC外围设备不需要它，但在这样做时，您意外地将PATA值复制到LATA寄存器。LUWIN指令，清除IOCAF寄存器，就是在这个PIC中清除“不匹配”的东西。
                    
                    
               
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                                                                            It's only by luck that your are sensing any changes at all.
I guess you tried to adapt some "interrupt on change" code from a much older PIC.
You are checking the wrong bits. Use LATx registers for output, PORTX registers for input.
So,
#define REA LATAbits.LATA0 // Rotary encoder pin definition
#define REB LATAbits.LATA2
should be
#define REA PORTAbits.RA0 // Rotary encoder pin definition
#define REB PORTAbits.RA2
 
The only reason you are getting away with it is because of this spurious instruction
    PORTA = PORTA; // read or Any read or write of PORTA,This will end the mismatch condition
You don't need that for the IOC peripheral in this PIC, but in doing it you are accidentally copying the PORTA value to the LATA register.
(The following instruction, clearing the IOCAF register, is what "clears the mismatch" in this PIC.)

另外，我不确定你的检测逻辑是否正确。如何在LCD上显示“状态”和“OLDSTATE”变量，看看它们是否是你所期望的。将LCD输出代码移出ISR是一个好主意。理想的是，你不应该做多于两个的事情。ISR内部的指令。你想尽快离开ISR以避免丢失的事件。
                    
                    
               
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                                                                            Also, I'm not sure your detection logic is correct.
How about displaying the "state" and "oldstate" variables on the LCD, and see if they are actually what you expect.
 
It would be a good idea to move the LCD output code out of the ISR.
Ideally you should never do things that take more than a couple of instructions inside an ISR. You want to get out of an ISR as quickly as possible to avoid missing events.
 

你好：QYB：你有超凡的洞察力！是的，我这样做是为了匹配一个旧的PIC程序，但事实上我不能理解“PATA= PORTA”的含义，所以我试图使它变灰；但是程序不能正常运行，然后我必须重新添加它；现在我修改了“Laxax”到“Poxx”，然后灰色化了“PoTa= PORTA”，程序正在运行。！谢谢！我发现造成“数字减少”的原因不是我使用了RA0/ICSPDAT，而这个PIXIT3使用的PIN同时，我认为一旦程序建立和负载从计算机完成，RA0将不再被PACKIT3占用，但是这是错误的，PIN的状态将是现在，我把它们改成RA4和RA5（这是用于外部晶体的两个端口，现在必须使用内部振荡器，因为这个PIC只有14个引脚），那么编码器旋钮控制可以适当地上下创建数字；谢谢您的建议！你太棒了！
                    
                    
               
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                                                                            Hi: qyb: 
 
     You have superb insight! yes I did this to match an old pic program, but in fact I  can't understand what's meaning of "PORTA = PORTA"  , so I tried to gray it out;  but the program could't run properly, then I had to add it back again; Now I revised the "LATAX" to "PORTX", and gray out the "PORTA = PORTA", program is running ! thanks! 
   
    And I found the reason caused the "number decrease" didn't happen is I used the RA0/ICSPDAT, and this pin used by pickit3 at the same time, I thought once the program build and load from computer completed, the RA0 will not be occupied by pickit3 anymore, but that's wrong, the status of pin will be interfered ; Now I changed them to RA4 & RA5(this two port used for external crystal, have to use the internal oscillator now, because this pic only have 14 pins), then the encoder knob control can create number going up and down properly; thanks for your advise! you are superb!