如何用不同的寄存器来改变PIN的功能

你的意思是一直都在？你可能需要给它一些关闭时间（延迟后设置低）。如果它熄灭了1U，你将无法在LED上看到它。



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You mean it's always on? You probably need to give it some off time (delay after setting it low). If it goes off for 1us, you won't be able to see it on the LED.

摘录末尾的下列代码是：LATAbits.LATA5=1；//set pin为high_._ms(1000)；//.of 1secondLATAbits.LATA5=0；//set pin为high吗？



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    Does the following code at the end of the excerpt:      
 
  LATAbits.LATA5 = 1;  //set pin as high
__delay_ms(1000); //delay of 1second
 LATAbits.LATA5 = 0;  //set pin as high
 
Not change the output of A5 from high to low with a delay of 1000ms, i.e. 1second?

代码，也就是说，不会闪烁一个LED。在LATA5＝0之后，您还需要另1秒的延迟。



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while(1)
{
        LATAbits.LATA5 = 1;  //set pin as high
        __delay_ms(1000); //delay of 1second
        LATAbits.LATA5 = 0;  //set pin as high
}

The code, as-is,  is not going to blink a LED. You'll need another 1-sec delay after LATA5 = 0.

谢谢你回来-我增加了一个额外的延迟（1000），它没有任何效果。引脚A5的LED不断高？



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    Thanks for getting back - I added an additional __delay_ms(1000) and it has no effect. The LED on pin A5 is constantly high?

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    you have this:
while(1)
{
        LATAbits.LATA5 = 1;  //set pin as high
        __delay_ms(1000); //delay of 1second
        LATAbits.LATA5 = 0;  //set pin as high
        __delay_ms(1000); //delay of 1second

}
_XTAL_FREQ 32000000
there is not way you are not getting a warning that delays overflows with a 1 second delay

正如NKurzman所提到的，你在回路中打开LED，等待1000毫秒，关闭LED并立即返回。如果你有一个示波器，你会看到针A5低到一个时钟周期周期（TIN）。正如前面提到的那样，Y-DELAYSIMS（1000）会给编译器带来错误。1000是太大的，对于α-DelayyMs（）。我需要一个单独的“助手”函数，当我需要一个快速和肮脏的方法产生长阻塞延迟。你也知道一些端口的模拟选择功能吗？安塞尔。例如ANSELLA＝0x00；将端口设置为数字IO模式。我不熟悉你正在使用的设备，但安塞尔偶尔会给我带来麻烦。我不认为这特别适用于你的设备，但值得注意。



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    As mentioned in by NKurzman... You're while loop turns the LED on, waits 1000ms, turns the LED off and immediately back on. If you have an oscilloscope you will see pin A5 go low for one clock cycle period (TCY). Also as mentioned __delay_ms(1000) will be giving you a compiler error. 1000 is too big for __delay_ms(). I use a separate 'helper' function when I need a quick and dirty method of generating a long blocking delay.
 

void delay_ms(uint16_t t)
{
    while(t--)
        __delay_ms(1);
}

 
Are you also aware of the analogue select function of some ports? ANSEL. For example ANSELA = 0x00; will set port A pins to digital IO mode. I'm not familiar with the device you are using, but ANSEL trips me up ocassionally. I don't think this applies specifically to your device, but it's worth noting.

前几天安塞尔在PIC18上绊倒了我，但这是一个简单的解决办法。抓了我的头一段时间试图弄清楚为什么产量仍然不高。然后我还了解了PIN函数优先级表…数字I/O总是在优先级列表的最底部，所以您可能需要在它工作之前先禁用一些外围设备。数据表很好地解释了这一切。不要只是粗略地看一眼，花大量的时间阅读它。



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ANSEL tripped me up on a PIC18 the other day, but that was an easy enough fix. Scratched my head for a while trying to work out why an output still wasnt going high. Then I also learned about the pin function priority table... Digital I/O is always at the very bottom of the priority list, so you may need to disable some peripherals first before that works.
 
Two little gotchyas to keep in mind. The datasheet is pretty good at explaining it all. Dont just give it a cursory glance, spend a good amount of time reading it.

此外，除非你特别使用低压编程模式，你应该设置为关闭。对不起，虽然这通常是正确的，我忘了好奇板运行在LVP模式。



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Also unless you are specifically using low voltage programming mode you should set this to OFF.
 

Sorry, while this is normally correct I have forgotten that the Curiosity board runs in LVP mode. 

我怀疑你的照片没有你想象的那么快。我不能更具体，因为这个PIC有新的振荡器模块，我还不熟悉它。



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    I suspect your PIC doesn't run as fast as you expect. I cannot be more specific as this PIC has new oscillator module and I am not yet familiar with it.

16F1619明确地拥有ANSELX寄存器，这些寄存器必须被正确配置以在I/O端口引脚上获得数字功能（它们默认为模拟输入）。



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The 16F1619 definately has ANSELx registers which must be properly configured to get digital functions on I/O port pins (they DEFAULT to analog inputs).

通过配置字（FOSC=INTOSC）选择内部振荡器，默认时钟速度为500Khz（参见数据表）。为了让32Mhz列成“#._XTAL_FREQ 32000000//pic16f1619的内部振荡器32MHz”，您必须将OSCCON寄存器中的IRCF bts的值设置为“1111”。然而，这将产生16Mhz的频率而不是32Mhz，因为这是内部振荡器的最大频率，除非启用了4x锁相环（参见数据s中的适当部分）。



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With the internal oscillator selected by the config word (FOSC = INTOSC ) the default clock speed will be 500Khz (see data sheet). In order to get the 32Mhz listed as "#define _XTAL_FREQ 32000000 //internal oscillator of pic16f1619 is 32MHz" you MUST set the value of the IRCF bts in the OSCCON register to '1111'. This however will produce a frequency of 16 Mhz NOT 32 Mhz as this is the maximum frequency of the internal oscillator UNLESS the 4x PLL is enabled (see the appropriate sections in the data s