Serial Communication with PIC16F877A

[mcbeasleyjr]

I have scratched the line as you suggested... however, it still isn't working. If I try to transmit the example in my code, which is A369621... I don't receive anything back at all. Also, if I don't transmit anything and the USART times out, I receive this: ¬ºê*ë... any other ideas?

Do I have to set PORTC as this:????

TRISC=%11000000

I'm a little confused on the correct settings to get the USART to function properly.

[mackrackit]

Maybe this will help.
http://www.melabs.com/resources/samples/pbp/usart.bas

[mcbeasleyjr]

I copy and pasted the code you provided me but had no luck with it...

[mackrackit]

Can you post your schematic and/or a picture of your setup. I think it is down to a hardware problem now.

Caps on the 232?
Cable is straight through?
Usb to serial converter?
Real serial port?
Port on PC is known to be good?

Hold one hand in the air while touching you big toe?

Could be anything now.

[mcbeasleyjr]

Can you post your schematic and/or a picture of your setup. I think it is down to a hardware problem now.

Caps on the 232?
Cable is straight through?
Usb to serial converter?
Real serial port?
Port on PC is known to be good?

Hold one hand in the air while touching you big toe?

Could be anything now.

Well... you'd have to give me a while to get a schematic drawn up. There are 4 caps on the 232. The cable is a regular serial cable, male on one end female on the other. I don't have a USB to serial converter although using that while trying to debug does work. It is a serial port on the back of my computer so I'm assuming that it is a real port. This is first time I've really tried using the serial port so as far as knowing whether its good or not I don't know, nor do I know how to check. Device manager does say that device is working properly with no problems. Lol, and not sure I want to try that one or not. Probably fall flat on my face.

[mackrackit]

Make sure the cable is not for a modem. Pin 2 on one end goes to Pin 2 on the other, the same for pin 3.

Test PC serial port by jumping PINs 2 and 3 with a 10K and use a terminal to see if you get an echo.

[mcbeasleyjr]

Make sure the cable is not for a modem. Pin 2 on one end goes to Pin 2 on the other, the same for pin 3.

Test PC serial port by jumping PINs 2 and 3 with a 10K and use a terminal to see if you get an echo.

I tested my serial port and sent 5 succesfully in the loopback... what else can i try?

[Archangel]

Make sure the cable is not for a modem. Pin 2 on one end goes to Pin 2 on the other, the same for pin 3.

Did you test as Mackrackit suggested above? Many serial appearing cables are actually laplink cables, or nul modem cables and the Tx and Rx pins are crossed so two computers can be linked directly.