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oh!! TRISD . I have modified my code. it runs well.
thanks so much.

Richard Arroyo

The first your post is very very good!!

I have test some connection on my circuit board
+ MCLR --> OK
+ Both power supply-->OK
+ Resistor connected with LED 330 ohm
+ Crystal -> HS

When I measure PIN OSC1,OSC2( Pin13,14) the ...

Maybe something wrong in configuration bit. This is very simple code, i'm newbie use PIC18F458. I want a Led blink with cycle of 500ms. But i can;t see it blink.

Helpme pls, i don't have much time ...

#include<18F458.h>
#fuses NOWDT,HS,NOLVP,NOBROWNOUT,PUT,NOCPD,NOSTVREN,NODEBUG,NOWRT
#use delay(clock=8000000)
void main()
{
int16 temp;
int8 i;
for(i=1;i< ...

I have used flex_lcd.c for Pic16F877A but it doesn't working. I don't know why. I used PORTB
RS PIN_B2
E PIN_B3
D4-D7 PIN_B4-PIN_B7

help me pls? or another code!!

could you guide me the steps to design a pid controller!
I'm newbie and have a bit know a bout PID

When I compile my program there's an errors appeared:

Expect comma
what's problem? I think this problem doesn't cause by syntax.

I've checked these thing. but my PIC16F88 can't do its job.
I change another 16F88, the failure too!
I don't know why?

I want to make a led flash by this code. I use PIC16F88, Crystal 4 MHz

#include<16F88.h>
#fuses NOWDT,HS,MCLR,NOLVP,NOPROTECT
#use delay(clock=4000000)
main()
{
...

I'm sorry this post is not clearly. Because of my english...
I want to display number such as 34.5,35,35.5..mean that each step is 0.5
If I use

printf(lcd_putchar,"%3.1f",val); ...

I'm sorry this post is not clearly. Because of my english...
I want to display number such as 34.5,35,35.5..mean that each step is 0.5
If I use
[code]
printf(lcd_putchar,"%3.1f",val);
[\code]
...

Can i use button on RB0/INT for 2 jobs.
- first: for Interrupt
- second: for what button is pressed?

for exams
when button on RB0/INT is pressed we go to interrupt routine. During interrupt rout ...

this is my routine to check what key is pressed

char key_id;
......
while(1)
{
if(RA0==0)
{
delay_ms(20);
if (RA==0) key_id=1;
} ...

I have some trouble when working with LCD

I want to display an unsigned char on LCD. For exam var=51;
when display it on LCD it always 50. Mean that it always display
(var-var%10).

and when I ...

For reading or writing to a device, we need driver . And there are many way to communicate with them : 3-wire,1-wire,I2C...
Any one can tell the way to build driver from datasheet. pls, give specific ...