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PC communicates with two mcus, two mcus link with bus.
If first mcu's address is 0X00;the second mcu's address is 0x01.
PC send a address, then the two mcus both receive the address to
judge which ...

How to use the serial’s TXSTA RCSTA ? How to set up TXSTA‘s TX9D to judge whether send the address or data ?

I don't find the sample about this for a long time.

Who can help me ? Thanks in a ...

I used the internal voltage reference,I use 2 AD，2 AD pin are empty.if I use the external voltage reference,is that better?

I use the pic's AD, but the precision seems not very good. I do not know if there are better way to improve it ? Before acquire the value I give much delay(2ms). I'm using the PIC4523 (12bit AD).
The ...

thanks for your replies;
In the code,I use as follings

#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7, Parity=N, Bits=8, ERRORS)
#use i2c(Master, sda=PIN_C4, scl=PIN_C3,FORCE_HW)

I add 'errors' ...

I wrote a function GetI2C(), receiving data via I2C from another microcontroller,
by int_rda the MCU accept instruction from PC,then called this function, and then use int_tbe sent sent to the PC, f ...

master.c

#include <16F877a.h>
#use delay (clock = 20000000)
#fuses HS, NOWDT,NOPROTECT,NOLVP
#include <lcd.c>
#use i2c(Master, sda=PIN_C4, scl=PIN_C3)

void main&# ...

thanks Matro and Robert Scott

A variable can be read, and also can write, if there is a conflict, one is reading the variable, and the other is writing the variable. In the case，error will be there. How to solve the problem ?
I ...

thanks every one ,everything is ok

I read all of the replies,I know a lot.thank you Matro,Ttelmah and LEVENT
I understand the #INT_SSP and i2c_isr_state(),send one byte at a time.

master call i2c_read() function,then slave will cal ...

master PIC4523 is unable to receive the value which slave PIC16F877 transmits via the I2C, the PC terminator can't display any letter
the code is following

master

#include <18F4523.h> ...

The serial port is unable to receive data with the interrupt correctly

In the beginning, Receive data with interrupt and Transmit data with putc, have the following problem. afterward transmit and ...

Definition of some local variables, the compiler show
"A numeric expression must appear here"
when they are Defined as global variable ,they are not wrong, do not they can be defined as ...

set_tris_a(0b10); ->set_tris_a(0x02);

int rf_pass; ->int1 rf_pass;