Why program the PIC18 in C

[king_diaw]

four major reasons:
1) less time consuming.
2) easier to modify and update
3) can use code available in function library
4) Portable to other microcontroller with litter or no modification

some body that interest want to program the PIC in C, I'm suggest you to use C18 complier with integrated to MPLAB IDE

[AzkA]

yes.. that the reason why use C in PIC.. but that still have the limition.. the prgram that compile from C is more big.. then it need more space memory in PIC

[king_diaw]

thanks for your answer.
now I'm doing some project that using I2C interfacing. PIC18F4550 as master and PIC182550 as slave.
I actually can't communicate those IC's yet. Do you know how to use i2c.h library to configure PIC18F2550 as a slave?

for the master configuration I'm already done. The sample code for the master configuration as shown below.

Code:

void i2c_start(unsigned char address, unsigned char size, unsigned operation)
{
unsigned char i;

SSPCON2bits.SEN = 1; //send START
while(!SSPIF); //hold program until progress is completed (SSPIF will be set)
SSPIF = 0; //clear flagbit caused by START
SSPBUF = address + operation; //send addres to slave (operation = 1 if read, 0 if write)
while(!SSPIF); //hold program until data is transmitted (SSPIF will be set if completed)
SSPIF = 0; //clear flagbit caused by transmission
if(operation == write) //if write operaion
{
for(i = 0; i < size; i++)
{
SSPBUF = i2c_master_data[i]; //send data[i]
while(!SSPIF); //hold program until transmission is completed
SSPIF = 0; //clear flagbit caused by transmission
}
SSPCON2bits.PEN = 1; //after all data is transmitted, send STOP
while(!SSPIF); //hold program until progress is completed (SSPIF will be set)
SSPIF = 0; //clear flagbit caused by STOP
}
else if(operation == read) //else read operation
{
for(i = 0; i < size; i++)
{
SSPCON2bits.RCEN = 1; //enable reception
while(!SSPIF); //hold program until progress is completed (SSPIF will be set)
SSPIF = 0; //clear flagbit caused by reception
i2c_master_rcvb[i] = SSPBUF; //store data in rcvb[i]
if(i == (size - 1)) //if last byte, send NACK
SSPCON2bits.ACKDT = 1; //successful transfer data
else //else send ACK
SSPCON2bits.ACKDT = 0;
SSPCON2bits.ACKEN = 1; //send acknowledgement
while(!SSPIF); //hold program until progress is completed (SSPIF will be set)
SSPIF = 0; //clear flagbit caused by acknowledgement
}
SSPCON2bits.PEN = 1; //after all data is transmitted, send STOP
while(!SSPIF); //hold program until progress is completed (SSPIF will be set)
SSPIF = 0; //clear flagbit caused by STOP
}
}