Processor has been reset by watchdog timer expiring PIC16F887

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Tv.1902

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Recently I try to code display LCD on mikroC. However when I run proteus simulation and it said like the thread above.
Can you show me what problem I am encountering.
Thanks in advance and here is the code

Code C - [expand]
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// LCD module connections
sbit LCD_RS at RB0_bit;
sbit LCD_EN at RB1_bit;
sbit LCD_D4 at RB2_bit;
sbit LCD_D5 at RB3_bit;
sbit LCD_D6 at RB4_bit;
sbit LCD_D7 at RB5_bit;
 
sbit LCD_RS_Direction at TRISB0_bit;
sbit LCD_EN_Direction at TRISB1_bit;
sbit LCD_D4_Direction at TRISB2_bit;
sbit LCD_D5_Direction at TRISB3_bit;
sbit LCD_D6_Direction at TRISB4_bit;
sbit LCD_D7_Direction at TRISB5_bit;
// End LCD module connections
 
void main(){
  TRISB = 0x00;                   
  PORTB = 0x00;
 
  Lcd_Init();                            
  Lcd_Cmd(_LCD_CLEAR);                   
  Lcd_Cmd(_LCD_CURSOR_OFF);             
 
  while(1) {                            
       Lcd_Out(1,1,"Hello World");  
  }
}


[ADDED 'C' CODE TAGS]
 
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FvM said:
This happens if you enable WDT in the processor configuration but don't service it in your code.
Click to expand...
Thanks i found the reason why however it doesn't show anything. What should I do
 
Last edited:

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Hi,

I agree with FvM.

***
You expected a problem with the software.
But you posted only a part of your software.
We don´t know how all the LCD functions look like, nor whether (and which) LCD library you use.

So if there was a problem in these functions .. we could not find them.
Next time please post your complete software... so we can better help you.

****
Btw: an infinite loop without delay to write to the display may probably result in display artefacts. But I understand here it is for testing purpose only.
From my experience: updating a display more than 3 times per second usually results in bad redability.

Klaus
--- Updated ---

Added:
Tv.1902 said:
What should I do
Click to expand...
Did you read the PIC datasheet section how to use the watchdog?

I´m not familiar with PIC, but as FvM states you usually have to clear the watchdog counter regurarily in your software.
I miss this.

****

From my experience:
In my programs I often use continously running - important - interrupts.
In this case I don´t only rely that the main loop is running properly, but the interrupt(s) as well.
Thus I set a global flag in the ISR. I check this flag in main loop and {clear the wtachdog counter and clear the flag) in main loop.

This way ... I can be sure that the main loop is running properly as well as the interrupt(s) is running properly.

Klaus
 
Last edited:
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Sorry I don't really understand you, however about the watchdog timer it was my mistake instead of f887 I chose f877 that's why I encountered that problem. After I changed the MCU name it's not the problem anymore. I follow this tutorial however the LCD doesn't show anything. Here is the link of the tutorial https://microcontrollerslab.com/lcd-interfacing-pic16f877a-microcontroller/
And this is their code. I'm really appreciate your supports
 

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Watchdog is enabled in processor configuration bits in mikroC.
You didn't show any related code yet.
--- Updated ---

In 16F877 it's configuration bit WDTE
 
Last edited:

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mikroC manual says
 

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