如何在XC8中将字符串写入LCD

我使用MPLAB X 4.15和XC8 1.45。



      以下为原文

    I use MPLAB X 4.15 and XC8 1.45.

看门狗定时器开启了吗？你已经启用中断，你有ISR功能吗？



      以下为原文

    Is the Watchdog timer ON?  You have interrupts enabled, do you have the ISR function?

您所示的两个函数本质上是相同的，并且是正确的。这意味着问题在WrreDelDATA（）函数的内部，因此您需要查看其他地方，如1和0所示。



      以下为原文

    The two functions you show do essentially the same thing and are correct.
That means the problem is inside the writeLcdData() function,
so you need to look elsewhere as 1and0 is suggesting.
 

如果你只运行你的应用程序（没有调试），你的LED闪烁吗？请使用代码标签。论坛软件将解释特殊的序列，从而破坏您的发布代码，就像您的代码一样。空LCDSRead Engy字符串（unChar char *STR）{int i＝0；同时（STR）！= /循环将继续到StrueWrreCdDATA（STR）中的空字符；//通过字节码+发送LCD字节上的数据；}这是来自ZIP的正确代码。



      以下为原文

    Does your LED blink, if you simply run your application (without debugging) ?
 
And PLEASE use code tags.
The forum software will interpret special sequences and thus destroy your posted code, as it did with your code.
 
void LCD_write_string(unsigned char *str)
{
int i=0;
while(str!=''){
// loop will go on till the NULL character in the string
writeLcdData(str); // sending data on LCD byte by byte
i++;
}
 
This is the correct code from  ZIP
void LCD_DisplayString(const char *StrC)
{
while(*StrC)
     writeLcdData(*StrC++);
}

void LCD_write_string(unsigned char *str)
{
  int i=0;
  while(str!=''){
  // loop will go on till the NULL character in the string
    writeLcdData(str); // sending data on LCD byte by byte
    i++;
  }
}

你设置RS了吗？Re=＝0用于数据的指令＝1



      以下为原文

    Have you set RS?
RS = 0 for instruction
RS = 1 for data
 

谢谢大家，为了快速回答。我使用PIC18F46K40并使用端口A到Bean 8位数据总线到LCD。我有PACKIT3作为程序员和调试器。我已经关闭了看门狗ALRADYY配置如下。在调试时，我看到程序没有去写WrdLCDDATA（）函数。在循环条件下似乎有点不对劲。当我按下“继续”按钮时，程序将永远运行在（1）主功能中。谢谢你的建议，我已经编辑了这个帖子。是的，我在Time0中断和一个主函数中切换了一个LED。它们用句柄正确闪烁。是的，写的是DeleDCDATA（）；将RS设置为高。



      以下为原文

    Thank you, everyone, for the quick answer.
I use the PIC18F46K40 and use PORT A to be an 8-bit data bus to the LCD.
And I have the PICKIT3 as the programmer and debugger.
 
 

I have turned off the Watchdog already my config is the below.
 

// CONFIG1L
#pragma config FEXTOSC = OFF // ->Oscillator not enabled
#pragma config RSTOSC = HFINTOSC_1MHZ // ->HFINTOSC with HFFRQ = 4 MHz and CDIV = 4:1
// CONFIG1H
#pragma config CLKOUTEN = OFF // ->CLKOUT function is disabled
#pragma config CSWEN = ON // ->Writing to NOSC and NDIV is allowed
#pragma config FCMEN = ON // Fail-Safe Clock Monitor Enable bit->Fail-Safe Clock Monitor enabled
// CONFIG2L
#pragma config MCLRE = EXTMCLR // ->If LVP = 0, MCLR pin is MCLR; If LVP = 1, RE3 pin function is MCLR
#pragma config PWRTE = OFF // Power-up Timer Enable bit->Power up timer disabled
#pragma config LPBOREN = OFF // ->ULPBOR disabled
#pragma config BOREN = SBORDIS // Brown-out Reset Enable bits->Brown-out Reset enabled , SBOREN bit is ignored
// CONFIG2H
#pragma config BORV = VBOR_2P45 // Brown Out Reset Voltage selection bits->Brown-out Reset Voltage (VBOR) set to 2.45V
#pragma config ZCD = OFF // ZCD Disable bit->ZCD disabled. ZCD can be enabled by setting the ZCDSEN bit of ZCDCON
#pragma config PPS1WAY = ON // PPSLOCK bit One-Way Set Enable bit->PPSLOCK bit can be cleared and set only once; PPS registers remain locked after one clear/set cycle
#pragma config STVREN = ON // Stack Full/Underflow Reset Enable bit->Stack full/underflow will cause Reset
#pragma config DEBUG = OFF // Debugger Enable bit->Background debugger disabled
#pragma config XINST = OFF // Extended Instruction Set Enable bit->Extended Instruction Set and Indexed Addressing Mode disabled
// CONFIG3L
#pragma config WDTCPS = WDTCPS_31 // ->Divider ratio 1:65536; software control of WDTPS
#pragma config WDTE = OFF // WDT operating mode->WDT Disabled
// CONFIG3H
#pragma config WDTCWS = WDTCWS_7 // WDT Window Select bits->window always open (100%); software control; keyed access not required
#pragma config WDTCCS = SC // WDT input clock selector->Software Control



While debugging, I saw the program did not go to the writLcdData() function.
There seem to be something wrong in the loop condition. when I press the continue button program will running forever in while(1) in the main function.
 

Thank you for your advice, I have edited the post.
And yes, I toggle the LEDs one in Timer0 interrupt and one in the main function. They are blinking correctly with the period.
 


Yes the writeLcdData(); set RS to high.




void writeLcdData(uint8_t data)
{
   LCD_RS_SetHigh();
   LATA=data;
   __delay_us(5);
   LCD_E_SetHigh();
   __delay_us(50);
   LCD_E_SetLow();
   __delay_ms(10);
}

 

我想问题是你的代码中还没有显示给我们的地方。请显示整个C文件。



      以下为原文

    I guess the problem is somewhere in your code that you have not yet shown us.
Please show use the entire C file.
 

你有没有设置R/W引脚高？



      以下为原文

    Do you ever set the R/W pin high?
 

我相信沟通是好的。LCD没有损坏，我只能向LCD发送一个字符或符号。但不是字符串“Hello”。我已经拉开了我的项目并攻读了上面的文章。我也在这里附上了Meal.C和LCD1616X4.C。谢谢你的帮助。
主C。（3.65 KB）-下载56次



      以下为原文

    And I believe the communication is good. And the LCD is not broken.
I can only send a character or symbol to the Lcd. but not the string "hello".
 
    writeLcdCmd(Line4);
    writeLcdData(0x32); //2
    writeLcdData(0x35); //5
    writeLcdData(0x30); //0
    writeLcdData(0x20); //space
    
    writeLcdData('H');
    writeLcdData('e');
    writeLcdData('r');
    writeLcdData('o');
 I have zipped my project and attched to the post above.
and I attached my main.c and LCD_16x4.c here too.
 
 
Thank you for your help.
Bank
   Attached Image(s)


Attachment(s)

LCD_16x4.c (1.90 KB) - downloaded 59 times
main.c (3.65 KB) - downloaded 56 times

NVMRG勘误-搜索本论坛。



      以下为原文

    NVMREG errata -- search this forum.

+1这是一个让你入门的主题：PIC18FXXK40的XC8表数组处理



      以下为原文

   
+1
Here's one topic to get you started: XC8 Table Array Workaround for PIC18FXXK40

嗨，伙计们，问题解决了！只需添加代码就可以了。对不起，我以前不知道NVMRG和勘误表，我会把它记在我的每一个项目上。谢谢大家，再次感谢你们的帮助！谢谢，银行



      以下为原文

    Hi Guys,
 
The problem solved!
Just adding the code >>

NVMCON1|=0x80;

The program is working. Sorry that I don't know about the NVMREG and errata before.
I will keep it in mind for my every project. Thank you, everyone, again for your help!
 
Thanks,
Bank

此勘误表在与数据表相同的产品页中提供的勘误表文档中。组件的勘误表与数据表一样重要，并且需要在任何项目开发之前和期间进行审查。当新问题被添加时，偶尔检查更新，这不是Microchip独有的。我所使用的大多数复杂设备都有勘误表文档，这些数据必须被视为数据表的附录。



      以下为原文

    This errata is in the errata document available at the same product page as the datasheet. The errata sheet for a component is just as important as the datasheet and needs to be reviewed before and during any project development. Check for updates occasionally, as new issues get added.
 
This is not unique to Microchip. Most complex devices I have used have errata documents that must be considered as addenda to the datasheet.

请看这里http://cCATCAT.D.LAN.DP…E-HD44 780-ILI-KS000



      以下为原文

     look here http://catcatcat.d-lan.dp...e-hd44780-ili-ks0066u/

奇怪的是，以前的帖子回复到“等待批准”的状态时，它收到了第二个垃圾邮件标志，但现在用户已经被禁止，帖子又变得可见了…



      以下为原文

    Strange, the previous post reverted to "Awaiting approval" state when it received the second spam flag, but now the user has been banned, the post has become visible again...