更改CONFIG字位语法疑问

在程序运行时或程序编译时，是否尝试更改看门狗超时周期？在编译时，你使用一个{ Trac-MaqMig-ToFig-WDTPS＝（比率），（比率）是除法器比率（1，2，4，8，……）：例如，这将看门狗定时器预分频器设置成1:327 68分频比。



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    Are you trying to change the watchdog timeout period during runtime of the program or during program compile time? At compile time you use a #pragma config WDTPS = (ratio), (ratio) is divider ratio (1,2,4,8,......) for example:
#pragma config WDTPS = 32768
This sets the watchdog timer prescaler to a 1:32768 divide ratio.

嗨，在XC编译器安装的/DOCS文件夹中，有一组.html文件解释和记录每个PIC设备的配置设置的有效关键字和值。在一个单独的.c源文件中，尽管所有其他程序都是程序集，但在配置文件设置中没有其他需要的东西，只要文件被编译，并提供给链接器，它就不必被包含或从任何地方调用。但是，对于不同文件中的同一配置字，如果在配置字节中没有锁定WDT，则可以在RunTimeReGARD，Mysil中启用。



      以下为原文

    Hi,
In the /docs folder of XC compiler installation,  there is a set of .html files explaining and documenting  valid keywords and values for configuration settings for each and every PIC device.
 
Start with:  pic18_chipinfo.html
 
It is the C language #pragma syntax documented there.
You may have any or all #pragma config statements in a separate .c source file, even if all the rest of the program is assembly.
There is nothing else needed in the .c file with configuration settings, and it need not to be included or called from anywhere,as long as the file is compiled, and given to the linker.
 
There cannot however, be settings for the same configuration word in different files.
 
If WDT isn't locked ON in configuration byte, it may be  enabled in runtime
Regards,
   Mysil

Hi和[Link＝Melto:Jack @ KkStack ] Jack @ KkStal[/Link ]和MySil，TKS为您的快速RealyJack，我想在RunTimeMysIL中进行更改，我的疑虑是如何在运行时改变，因为编译器似乎不接受关键字μASM、ASM或ASM（“”）。我已经试过这3个选项，但得到编译器ErrOS。你还有其他建议吗？又来了



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    Hi and [link=mailto:jack@kksound]jack@kksound[/link]  and MySil, tks for your fast reply
 
Jack, I want to change in runtime
Mysil, my doubt is how to change in runtime, because it seems that compiler doesn´t accept the keywords #asm, _asm or asm(""). I´ve tried these 3 options, but get compiler erros.
 
Do you have any other advice??
Tks again
 

此外，MPLABX中的配置位设置窗口将为您编写所有的PyrPrima-COMPIG语句，它们通常是正确的。



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    Also the configuration bits setting window in MPLABX will write all the #pragma config statements for you and they are usually correct.

你可以把我在那个链接中的例程翻译成C。我可以在几分钟内完成，但是我现在很忙。



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You can translate my routine in that link into C.  I can do it in few minutes, but I'm kinda busy right now.
 

在这里：



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    Here:
void WriteWDT(uint8_t postscale)
{
    uint8_t flag = 0;
    
    ClrWdt();
    WDTCONbits.SWDTEN = 0;

    TBLPTR = 0x300003;
    TABLAT = postscale;
    asm("TBLWT");
    EECON1 = 0b11000100;
    
    if (INTCONbits.GIE) {
       INTCONbits.GIE = 0;
       flag = 1;
    }
    
    EECON2 = 0x55;
    EECON2 = 0xAA;
    EECON1bits.WR = 1;
    
    if (flag) INTCONbits.GIE = 1;
    EECON1bits.WREN = 0;
    WDTCONbits.SWDTEN = 1;
}

哦，对不起，我没意识到人们已经回答了这个问题。论坛布局是混乱的。你连接的线程也是关于在运行时改变WTD的。如果要在启动时设置PistCalver值，我建议你使用宏，具有后缩放器的期望值。



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    Oops, sorry I didn't realised people had already answered the question.
The forum layout is confusing.
 

The thread you've linked too is about changing the WTD during runtime.
If it's to set the postscaler value at start up, I suggest you use the macro
#pragma config WDTPS = 64
with the desired value of postscaler.

用这个代替这个应该更有效。；）



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    Replace this
   if (INTCONbits.GIE) {
        INTCONbits.GIE = 0;
        flag = 1;
    }

with this
   if (INTCONbits.GIE) {
        flag++;
        INTCONbits.GIE = 0;
    }

should be more efficient. ;)
 

嗨，伙计们，TKS再次为你们提供帮助。TKS 1和0我在这里运行代码，但是在执行例行程序之后，我的板就死了。我需要再和PicKit一起编程。你认为我不能改变这张照片中的配置词吗？我想我可以，因为我看到了数据表页363，但现在，读得更仔细，我已经注意到WO（写一次），我在下面展示。所以，我不能在运行时改变，对吗？链接到IMAGE HTPSP//www. DROPBOX.COM/S/AZTBI1E6K2C7QSD/CAPTURAR.PNG？DL＝0Br



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    Hi guys, tks again for your help. 
Tks 1and0
 
I ran the code here, but after execute the routine my board dies. I need to program with PicKit again.
Do you think I can´t change Config words in this Pic? I thought I could because I saw in datasheet page 363
But now, read more carefuly I´ve noticed WO (write once) as I show below. So, I can´t change in runtime, correct?
 
Link to the image
https://www.dropbox.com/s/aztbi1e6k2c7qsd/Capturar.PNG?dl=0
 
BR

哦，你使用的是PIC18FJ系列，其中配置数据存储在片上程序存储器空间顶部的四个字中。我想一个正常的闪存写入这个空间会起作用。当然，您需要一个电源周期来进行更改。&编辑：将地址更改为0x1FFFB，然后再试一次，即，编辑& gt；您可能需要以XX字节块写入，而不是只写一个字节，用于正常的Flash写入。也就是说，读取该块，修改所需的字节，擦除块，然后写入块（s）。通常，擦除块大小不同于写入块大小。



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    Oh, you're using a PIC18FJ series, where the config data is stored in the four words at the top of the on-chip program memory space. I'm wondering a normal flash write to this space would work. Of course, you would need a power cycle for the change to take effect.
 
Change the address to 0x1FFFB and try again, i.e.
    TBLPTR = 0x01FFFB;
 
You might have to write in block of XX bytes, instead of just one byte, for a normal flash write. That is, read that block, modify the desired byte, erase the block, and then write the block(s) back. Generally, erase block size is different than write block size.
 
 

嗯，对了。TKS 1和0我会尝试这个结果后最好的问候



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    Hmm oh right. Tks 1and0 I will try this and post de results
 
Best regards

嗨，伙计们，让你们知道。我不能在这个职位上写东西。也许我做错了什么，但现在我没有太多时间在这个问题上。因此，我解决了读取像StistBLPTR＝0x1FFFBASASTBLRD，EntasMuxByTe1= TabLAT相关的位置，然后测试AbxByT1并查看它是否运行了我的程序的旧版本（它是用标量值的后置标尺）或一个新版本。然后我决定是否启用看门狗。TKS再次为您提供帮助。



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    Hi guys, just to let you know. I couldn´t write in this position. Maybe I am doing something wrong, but I don´t have much time to spend on this issue now. So I solved just reading the position related to CONFIG2H like this 
 
TBLPTR = 0x1FFFB
_asm TBLRD _endasm
auxByte1 = TABLAT;
 
Then I test auxByte1 and see if it´s running a old version of my program (which were made with nominal value of postscaler) or a new version. Then I decide if enable or not the watchdog.
 
Tks again for you help