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@ckielstra: the compiler version is 3.236

@Humberto: I have already used fgetc() without kbhit() but it didnt wait for any characters and it has always 0x00 character received without that I have ...

I am using a 4 Mhz crystal. And it works smoothly.

sorry Humbrto, you r right! Embarassed

here are the fuses I am using and the different setup commands:

#FUSES NOWDT //No Watch Dog Timer
//#FUSES WDT128 //Watch ...

Which compiler version are you using? It might be a compiler bug.

Does your program work when you move the receive PIN_A2 to a pin on another port, for example port B?

I am using the PCWH versio ...

What does the rest of your RS-232 interface look like? Do you use an interface chip like the MAX-232?

exactly, I am using MAX232

PIN_A2 should be high when idle, did you check this ?

Humberto

yes I have checked this and both pins A1 and A2 are high

Code:

RB_counter=0;

while(1)
{
do
{
// wait here...
}while(!kbhit(commu));

if (kbhit(commu))
{
alps_in_data

but I think this ...

I have already added this command

setup_adc_ports(NO_ANALOGS|VSS_VDD);

so it is obviously not the cause of the problem

ADN

Hello,

I am using a PIC18F2550 which has a software R232-connection to the PC. I want that the RS232 waits till it gets 8 characters from the PC.

This is my code:

#use rs232(baud=57600, ...