Microcode Studio Plus Loader?

[Charles Linquis]

You need to insure that the serial port is working properly on both machines.

On my PC, I simply connect pins 2&3 together on the serial cable and hit a key. If the character echoes, then the PC end is working.

On the PIC side - Write a very simple program, such as:

DEFINE OSC 20 (or whatever it is)

DEFINE HSER_RCSTA 90H
DEFINE HSER_TXSTA 20H
DEFINE HSER_BAUD 9600
DEFINE HSER_CLROERR 1
DEFINE LOADER_USED 1

Dummy VAR BYTE

Begin:

HSEROUT ["Press Any Key "]
HSERIN [Dummy]
HSEROUT ["You Pressed ",Dummy,13,10]
GOTO Begin

END

The program above will prove that the PIC is sending and receiving characters - something it must do before any bootloader can work.

[koossa]

Hi Charles

Both sides are working perfectly, I am doing serial comms using HSEROUT and HSERIN.

Thx

[Charles Linquis]

Make sure Microcode Loader is set to use the correct serial port on your PC.

[koossa]

Yes, I have set that to Comm2.

[koossa]

I'm Using the PIC16F877 20/P with a 4MHz Crystal and then upload the 16F877_04.hex file.

Could my problem maybe be the "20/P"

Thx!