Problems with #use rs232

[BMaxwell]

I have a 16F819 with a HS:8Mhz clock. Its connected to a max 233 level converter which has been tested and is working properly. I can putc('u') but when I putc(getc()) nothing comes out the transmit line. I have an oscilliscope connnected to transmit and recieve. I see the out put from my computer using hyper terminal but nothing comes out the pic. Is there a timeframe issue? Is there a register i can look at to see the incoming data? Any6 help would be much appreciated.

[Humberto]

Hi BMaxwell,

It´s not possible to help you while we doesn´t have enough info, at least we need:
1) your code with headers and directives
2) cross-compiler version
3) the most relevant comments regarding the hardware.

rgds,

Humberto

[SherpaDoug]

Can you write a simple program to spew ASCII characters 0 through 255 repeatedly and look at the output with the scope? I recommend adding a sync pulse out of another pin at the start of each character to sync your scope to.
That should test out the putc() and hardware functions.
_________________
The search for better is endless. Instead simply find very good and get the job done.

[Guest]

The compiler is 3.148. The code looks like this
#include <16F819.H>

#use delay(clock=8000000)
#use fast_io(a)
#use rs232(baud=19200, xmit=PIN_A1, rcv=PIN_A0)
#use I2C(master, sda=PIN_B4, scl=PIN_B5, fast)


void main()
{
setup_adc_ports( ALL_ANALOG );
while(TRUE)
putc( getc() );


}

I am using a 16F819 Pic micro controller with a max 233a level converter. I am alos using a 24C256 for another program, this is just to get the Rs232 to work. In both programs it stops at the first getc.
Thanks for all the help.
Bryan

[PCM programmer]

[BMaxwell]

Ya I changed that line to no analogs but I still recieve no response. Is there any way to check a register? Im open to any suggestions. Thanks in advance.
Bryan

[PCM programmer]

Well, the reason is this line:

#use fast_io(a)

But you are not setting the TRIS for the transmit pin
(Pin A1) to be an output. It comes up as an input
pin upon power-up.

I normally avoid using fast_io. Unless you need the
ROM space or the speed, it's better to let the compiler
automatically handle it. If you did not use the fast_io()
line, then your program would already be running.

[BMaxwell]

Sweet that worked thanks pcm guy . One last question if I want a pin to go low, should I use output_bit(0, PIN_A2), or output_low(PIN_A2) when using standard io?
Thanks again pcm.
Bryan

[PCM programmer]