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Thank you, Eduardo so much.

Very well organized driver.
Your driver works great for me after deleting all spi_read() as you mentioned in the comment of the driver.

Sorry guys!..i was so mad with the time i wasted on this i didn't noticed that i was using a DS18B20P, the (only) parasitic power version of DS18B20!
So my problem was not in the software but on the ...

Can I use a normal BJT and pullup resistor instead of a MOSFET in
parasite power mode ? Thank you all for reply my noob question.

INTIO2 is an invalid fuse with 18F2525
My complier version is 4.020

I found the answer:D
the correct fuse probably is INTRC_IO
Is it right?:D

Plz Help me to config 18f2525 to use Internal oscillator at 8MHz and 32MHz.
Here is my test code.
I tested with Proteus to simulate my program.

#include <18F2525.h>
#fuses NOWDT, HS, NOPU ...

thank you so much
I undrstood
As you can see, I do not know much about USB:D

So it is very simple

/////////////////my modify//////////////////////////////////////////////////////////////////// ...

I've just do some test

The problem probably is usb_isr_tok_out_cdc_data_dne() rountine is called only one time when I send a string like "ccsforum", for instance

So, with usb_cdc_getc( ...

thank you for replying:D

With my mehod, using timer to check usb_cdc_kbhit() very ??us
The my usb_lcd works but it seemed that the transfer speed is low, so bargraph is display slower than it woul ...

Hello friends Very Happy

When I used usb_cdc.h for a virtual com, I can not use #INT_USB because this interrupt is used before.

My project is a char LCD driven by LCD smartie software via USB
I di ...

I think the problem may be in here

my code
#include <16F877A.h>
#include <def_877a.h>
#FUSES NOWDT, HS, NOPUT, NOPROTECT, NODEBUG, BROWNOUT, NOLVP, NOCPD, NOWRT
#use delay(cloc ...

I converted this code for 16F877A and send data to rs232
but there is something wrong.
Plz help me to check the code, sory if it was too long.

#include <16F877A.h>
#include <def_877a.h& ...

IThank you

Thank you
I have pull up resistor on both port D and port E.

the code library with motorola bus do the same thing .
http://www.ccsinfo.com/forum/viewtopic.php?t=27799&highlight=ds12887

r ...

Th problem here now is
Can not write to bit 5 (DV1) of regA(ie 0b0010xxxx)
the value of regD is 0x20 instead of 0x80 or 0x00

Help me plz:(

It would be very unlucky for me to buy 2 dead RTC from two different electronics shop. I am not sure about the reliablity of those electronics shop.

I've just done more tests
if(read_rtc(r ...