How to embed user ID into PIC

[Acetronics2]

deuhhh, yes there's an easier way.... Always nice to read MPASM PDF

Wasn't it called " RTFM " in the good ol' Forum times ...

Quand la censure ne coupait pas systématiquement tout ce qui pouvait ressembler à de l'humour ...

Mheuuuuunoon, je l'ai pas dit ...

Alain

[mister_e]

hasquetèkon

[Ioannis]

Now I would ask, how do you read these ID location in PBP?

Ioannis

[mister_e]

From MPASM

Usage
This directive is used in the following types of code: absolute or relocatable. For information on types of code, see Assembler Operation.

This directive is not commonly used, but does provide an easy method of serializing devices. __idlocs can be read by a programmer. PIC18 devices can read this value at run-time, but PIC12/16 devices cannot.

For PIC18, I guess Darrel have the right ticket for that. Something based around the following
http://www.picbasic.co.uk/forum/showthread.php?t=4093

[mister_e]

I found this snip on Microchip website

	// read serial number from PIC ID memory at address 0x200000 - 0x200007
	DWORD ReadIDMemory(void) {
	DWORD IdMemory=0;
	DWORD Temp;
	BYTE i;
	TBLPTR = (unsigned short long) 0x200000;

	for(i=0;i<8;i++) {
		_asm
		TBLRDPOSTINC
		_endasm
		Temp=TABLAT;
		Temp<<=((7-i)*4);
		 IdMemory+=Temp;
		}
	
	return IdMemory;
}

[Ioannis]

I find these a little complicated and limited to 18 series.

My good old programmer, (ELNEC PIKprog+), is doing this serialization in a very good manner. Also gives an option where to store the serial number, so one can choose to store in EEPROM or Code space. Reading then is childs play.

Ooh, and it counts automatically of course with programmable step.

I'd like though to have this option on my ICD2. Maybe one day Microchip will do it. Hope I am alive then!

Ioannis

[mister_e]

It is limited to PIC18 only if you want to access it at RunTime, unless most programmer are capable of reading the IDLOCS. And as you say, some also offer the automatic serialization, a nice plus.