Why use a bootloader?

[Fredrick]

Yes that´s true.

But with microcode and manual reset i have to program the PIC severel times whit the same program before the PIC starts...

So i think something is wrong.

I will do some more tests and then give you some feedback here.

[Fredrick]

Why do you sometimes have the define
DEFINE BOOTLOADER_USED 1

Tiny bootloader works with and without this define so i wonder what does the define do?

[mister_e]

in fact it has to be

DEFINE LOADER_USED 1

What it does? From memory, It reserved the first 4 code location for the bootloader (1-2 nop and a GOTO to the bootloader code (at the end of the code space))

Why it works with Tiny... can't tell, maybe he correct the .hex file for you... but as it's a small program, you're not experimenting issue just yet.

Keep the DEFINE LOADER_USED 1 at the top.

[Fredrick]

Yes, thats why i trying to get the Microloader to work..

another question
Will a "software reset" work to get into the "bootloader mode"?

http://www.picbasic.co.uk/forum/showthread.php?t=899

Asm
bcf PCLATH, 3
bcf PCLATH, 4
goto 0
EndAsm

or has it to be a real MCLR reset?

[mister_e]

As you're using a 18F

@    RESET

should do. bootloader mode get out pretty fast of there, not like Tiny (which I can recall something like ~1 Sec before getting out)

[Fredrick]

Hmm... why does´t microloader work...

When i press the program button the message "Please restet the PIC in order to access bootloader process"

I press the reset button on the PCB (MCLR) and nothing happens..... i have to close the message window then the programming starts. is that normal?

Should´t the programming starts when i press the MCLR button?

[Fredrick]

Another thing with Microloader and Microcode studio plus is the way i have to set the COM port.

(I use a virutuel COM port, not a real one.)

If i run only the Microcode loader i can´t set the COM port at all, the dropdownlist is empty and "gray". if i run Microcode studio i can set the COM port via the ICD toolbar but when i use my PIC18F2550 i can´t so to set the right COM port i have to change the device to 16F628A and then change the COM port and then change the device back to 18F2550.