使用PIC18F26J50的可重映射引脚问题

我认为你需要一个银行来选择PPS寄存器所在的银行。



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    I think you need a banksel to select the bank where PPS registers are.

感谢NothGee，只支持这个MCU。位于EC0H和F5FH之间的SFRs不是接入银行的一部分。应使用存储指令（使用BSR）或MeVoFF指令来访问这些位置。当编程IMPLAB®C18时，编译器将自动使用适当的寻址模式。



      以下为原文

    Thanks NorthGuy,
Only BANKED is supported for this MCU.

The SFRs, located between EC0h and F5Fh,
are not part of the Access Bank. Either
BANKED instructions (using BSR) or the
MOVFF instruction should be used to access
these locations. When programming in
MPLAB® C18, the compiler will automatically
use the appropriate addressing mode.

I followed example 10-7 in the Data Sheet which uses BANKED

确切地。这就是为什么你需要设置BSR来指向合适的银行。这通常是用BoSSEL完成的：



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Exactly. That's why you need to set BSR to point to the appropriate bank. It's typically done with banksel:
 
banksel PPSCON

再次感谢您的响应：BCF PPSCON，0，BoSSELSED语法错误（在文档中搜索BANSEL & GT；没有发现），在任何情况下IOLoCK都是0进入这个代码，因此即使没有该行，RPNR1的解锁和设置也应该工作。然而，它并不（BTW）（RP8）没有模拟功能，可以推翻这个引脚分配，如果活动的话）



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    Again thanks for your response
I tried:

BCF PPSCON, 0, BANKSEL

Gives Syntax Error  (Searched for BANKSEL in the documentation >> Not found) 
 
In any case IOLOCK is 0 entering this code so the Unlocking and setting of RPINR1 should work even without that line. Yet it does not (BTW that pin (RP8) has no Analog function which could override this Pin assignment if active)

银行卡



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    No:
BANKSEL PPSCON

谢谢DaLogo但史诗失败MOSLW 0x55 MOVWF ECOE2，0 MOVLW 0xAA MOVWF ECOE2，0班卡PSCON & GT；（第369行）……DrMaun.C：369：错误：语法错误重复-iOLok是0（从POR缺省状态出来），所以RPNR1映射应该在没有该代码行但调试的情况下工作。R表示RPNR1在代码之后是0x1F。RPNR映射代码是从文档示例中的精确拷贝。文件中没有提到银行卡。你有PIC18F系列的PPS代码样本吗？



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    Thanks DarioG but epic fail
        _asm
            MOVLW 0x55
            MOVWF EECON2, 0
            MOVLW 0xAA
            MOVWF EECON2, 0
            BANKSEL PPSCON   ->> (line 369)  ......dermain.c:369:Error: syntax error
 
I repeat - IOLOCK is 0 (coming out of POR default state) So RPINR1 mapping should have worked without that line of code but the debugger indicates that RPINR1 is 0x1F after the code.
 
The RPINR mapping code is an exact copy from the documentation example!
There is no mention of BANKSEL in the documentation at all.
 
Do you have a working PPS code sample for PIC18F series?

可能BACKSEL是一个宏，在嵌入式ASM模式中是不被识别的。我们应该能够找到它的源代码……我从来没有在PIC18上使用PPS，但是……我想说，值得一试查看BANSEL宏！应该像MOVB & LT；SFR＆GT的上字节；



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possibly BANKSEL is a macro and is not recognized in embedded ASM mode.
 
We should be able to find its source code...
 
I never used PPS on a PIC18 but...
I'd say, worth a try checking for BANKSEL macro! Should be something like MOVB

在PIC上设置PPS没有什么棘手的。去掉不必要的解锁代码和汇编语言，只需执行rpRR1＝8；并查看它是否工作。



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    There's nothing tricky about setting up PPS on this PIC.  Get rid of the unnecessary unlocking code and assembly language and just do RPINR1 = 8; and see if it works.

PPSCON和RPNR1寄存器位于访问RAM中。因此，必须确保在访问这些寄存器之前选择正确的银行。此外，从第一次写入到ECON2到写入PPPSON的魔术序列必须在四个指令周期中执行；这就是为什么在此之前必须禁用GIE的原因。银行的选择在PIC数据表中显示为一个MOVLB指令，它是BoSEL宏将装配到的。无论如何，尝试这个或使用CTO检查反汇编列表，以确保MOVLB指令不***入并打破魔术序列。XC8的M／γ端模。



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    The PPSCON and RPINR1 registers are _not_ located in the Access RAM. So you must ensure the correct bank is selected before accessing these registers.  Also, the magic sequence from the first write to EECON2 to writing PPSCON must be performed in exactly four instruction cycles; that's why GIE must be disabled prior to this.  The selection of the bank IS shown in the example in the PIC datasheet as a MOVLB instruction, which the BANKSEL macro will assemble to.  Anyway, try this
#asm
    BANKSEL PPSCON
    MOVLW   0x55
    MOVWF   EECON2
    MOVLW   0xAA
    MOVWF   EECON2
    BCF     PPSCON, _PPSCON_IOLOCK_POSN
    MOVLW   0x08
    MOVWF   RPINR1
#endasm

or use C
EECON2 = 0x55;
EECON2 = 0xAA;
PPSCONbits.IOLOCK = 0;
RPINR1 = 0x08;

but check the disassembly listing to ensure the MOVLB instruction is not inserted within and break the magic sequence.
 
It's #asm/#endasm for XC8.

MOVLB，不是MOVB YEP，对不起



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    MOVLB, not MOVB yep, sorry

感谢Javple -它工作-这么简单，我不知道为什么文件有所有关于解锁PIN映射寄存器等。



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    Thanks jtemples - It Works - So simple
I do not know why the documentation has all that about unlocking the pin mapping registers etc.

看起来IOLKOD位默认为POR上的“0”，它关闭PPS写保护。&编辑& GT；如果您想要写保护PPS，则需要解锁序列。



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It looks like the IOLOCK bit is default to '0' on POR, which turns off the PPS write protect.
 
You'll need the unlock sequence if you desire to write protect the PPS.