hello can you help about this source code(in image) the result not display

 

hi,
Does the label 'Value' appear on the LCD.?

What Xtal frequency have you set.?

 

the label 'Value' not appear on the LCD.
freq=8MHZ

 

Without knowing about, or having ever used, MikroC, there is probably another routine for initializing a LCD in 4 bit mode (the initialization sequence is different).

Other than that, can you view the ADC result when you run the simulation in debug mode?

Have you verified the LCD is working?

In a side note, I think that these simulators can do you a real disservice as it allows you to run code in a PIC without a clock.

 

exist a loop in L_Delay_5500us3

L_Delay_5500us3:
0x0013 0x0BFD DECFSZ R13, 1
0x0014 0x2813 GOTO L_Delay_5500us3

 

First make sure your LCD functions work. Start with writing a program that write "hello world" on the LCD Before such a program works it is no point in going further. Then write a simple routine that convert the the 12 bit ADC value to a ASCII format number and use the working LCD routine to dump latter ADC ASCII number on the LCD

 

exist a loop in L_Delay_5500us3

L_Delay_5500us3:
0x0013 0x0BFD DECFSZ R13, 1
0x0014 0x2813 GOTO L_Delay_5500us3

Yes, a blocking delay will use a loop.

[...] 12 bit ADC value [...]

Agreed, but a small point - it's a 10-bit ADC...

 

lcd work but adc_read(); don't work
can any one give me an example on adc with pic16f877a with source code since i'm beginner in microcontroller?

 

You will need to set the ANSEL and comparator registers for the analog functions to work.

See here.

 

lcd work but adc_read(); don't work
can any one give me an example on adc with pic16f877a with source code since i'm beginner in microcontroller?

hi,
You said in post #3, that the 'text label= value' is not being displayed, so the LCD is not working.

Can you post the full hex code?, I do not use MickroC

 

Look at your 12 messages!!!!! You'll find that MCLR needs to be connected to 5v rail!!

 

@Alicp
As a beginner it could be smart to always include this code in your program

ANSEL  = 0x00;              // Configure all pins with ADC option 
ANSELH = 0;                 // as digital I/O
  C1ON_bit = 0;               // Disable comparators
  C2ON_bit = 0;

And if you need analog input rather set the needed bit in the corresponding ANSEL(H) register bits separately. By default after a reset pins with ADC input function are configurated as analog input NOT digital IO

 

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@Alicp
As a beginner it could be smart to always include this code in your program

ANSEL  = 0x00;              // Configure all pins with ADC option 
ANSELH = 0;                 // as digital I/O
  C1ON_bit = 0;               // Disable comparators
  C2ON_bit = 0;

And if you need analog input rather set the needed bit in the corresponding ANSEL(H) register bits separately. By default after a reset pins with ADC input function are configurated as analog input NOT digital IO

Not on a pic16f877a you won't.... It hasn't got any ansel registers.... ADCON1 = 0x7;

But that's not his problem... In ISIS he need to set MCLR pin otherwise it will not simulate...

 

[the entire generated hex file... [...]

1.)Put it in code tags! (The button that looks like"#" above your post's edit box - it surrounds your code with [CODE ] and [/CODE ] tags, minus the added spaces, so your post doesn't make the page gigantic)

2.) Phrase put some context in your posts - explain why you are posting it and what it is for.

3.) How did you verify the LCD works?

 

Not on a pic16f877a you won't.... It hasn't got any ansel registers.... ADCON1 = 0x7;

But that's not his problem... In ISIS he need to set MCLR pin otherwise it will not simulate...

... even with MCLR turned off in the configuration?

So it will let you simulate without a clock, but a missing pull up breaks it?

 

same problem no new

 

... even with MCLR turned off in the configuration?

So it will let you simulate without a clock, but a missing pull up breaks it?

MCLR is not configurable on the pic16f877a...

The crystal is not simulated in ISIS....

 

hi Alicp,
My program is reporting 'check sum errors' for your program listing, sorry I cannot run it.

 

The initial jump location is to 0x4D5 but the hex line throws a CRC error.

The code tries to access 0x107 and 0x108... not valid...

The code is also displaying a CONFIG WORD2 again not from this chip... I suspect you have the wrong processor selected in your IDE!!