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thank you, Do you mean that I can clean (clear) the LCD by using

printf(lcd_putc, "\f");

IN the library there is a LCD.c driver, but there is not a function for cleaning the lcd, anyone know how?

Thank you everybody:

I bought another LCD from digikey, the new part works fine, I can see the character. thank you all!

I could not find the same data as for the LCD, here is a websit from mikro at page 19, it show the graph
http://www.mikroe.com/pdf/easypic3_manual.pdf

#if defined(__PCM__)
#include <16f76.h>
#fuses HS, NOBROWNOUT,NOWDT,NOPROTECT,NOPUT
#use delay(clock =8000000)
#use RS232(baud=9600, parity=N, xmit=PIN_C6, rcv=PIN_C7&# ...

my lcd came with a development board which Vo(Ve) is setup as pluse, no negative voltage, even I tried the testing program came with the board, it would not show anything!

any other suggestions? pl ...

Ve=Vo

Thank you:
which pin is LCD bias voltage pin?

I have a contrast pin Vo pin setup, and no matter how I adjust my contrast, it still show nothing?

I used a 2x16 segment LCD and used lcd.c driver provided by ccs. I was able to write to the lcd long time ago using the following setup

PortB LCD
B7 D7
B6 D6
B5 D5
B4 D4
B0 Enable
B1 ...

I have the following simple program:

I want to wait for a input from pin A1 and then print out something, however, my program went to an endless loop, even I put PIN_A1 high (by connecting to 5V) a ...

Thank you PCM:
you are right, I tested it again it is working, before when I was testing it, I run the for loop too fast that the meter could not followed it.

I have used pwm function for several chips, and it works very well so far, I can set duty as constant as well as variable, however, when it comes to pic16f684 chip, I just got the set_pwm1_duty() func ...

it is my fault, there is two signal. I took the wrong one. sorry, but it is a good point to learn about the possible clock problem.

Thank you Ttelmah and croc4!

if clock is wrong, the delay_us(200) should be wrong also, however, I did not see delay_us(200) wrong.

i am using 16f630 chip and the compiler is 3.202. I put the Setup_oscillator(OSC_4MHZ|OSC_INTRC); but the compiler could not recognize it.