ICSP using a 16F84a to program 24CXX

[aftab]

Hello,

I want to program an I2C (24CXX) using 16F84a.

I want to write "Hello World!" to 24CXX.

Using a JDM programmer(from Olimex) I could program the 24c in ICSP using my computer's serial port.

Using the example that is there in the manual , I could program the 24C using all 8 pins with instructions going out to 24C from 16F84a. But how do I do a ICSP(In Circuit Serial Programming) of 24C ?

If this is the wrong place to ask the question -- where should I ask it ?

Sincerely
Aftab.

[skimask]

Hello,

I want to program an I2C (24CXX) using 16F84a.

I want to write "Hello World!" to 24CXX.

Using a JDM programmer(from Olimex) I could program the 24c in ICSP using my computer's serial port.

Using the example that is there in the manual , I could program the 24C using all 8 pins with instructions going out to 24C from 16F84a. But how do I do a ICSP(In Circuit Serial Programming) of 24C ?

If this is the wrong place to ask the question -- where should I ask it ?

Sincerely
Aftab.

If the programmer can do 24Cxxx types directly, then install a breakout header like you would for the PIC's ICSP, plug in and program like it was in the socket on the programmer.

[aftab]

If the programmer can do 24Cxxx types directly, then install a breakout header like you would for the PIC's ICSP, plug in and program like it was in the socket on the programmer.

I did that, but it does not work.

Do I need to do special coding (peek,poke,srout,...) to do an ICSP ?

Somewhere in JDM programmer, it says the voltage goes upto 13v.

I am no electronic geek - so do not understand much.

Any clue what might be the problem ?

Thanks
Aftab

[skimask]

I did that, but it does not work.
Do I need to do special coding (peek,poke,srout,...) to do an ICSP ?
Somewhere in JDM programmer, it says the voltage goes upto 13v.
I am no electronic geek - so do not understand much.
Any clue what might be the problem ?
Thanks
Aftab

You probably have to add another header or something to cutoff the outside signals going to the 24xxxx itself. You're probably trying to feed power/signals to the whole board, not just the 24xxx, PIC fires up, signals start interfering with each other, etc. Try pulling other chips out, etc.
The JDM programmer voltage is only for the PIC (or maybe other MCU's). 13v would most likely kill a 24xxx.

[aftab]

You probably have to add another header or something to cutoff the outside signals going to the 24xxxx itself. You're probably trying to feed power/signals to the whole board, not just the 24xxx, PIC fires up, signals start interfering with each other, etc. Try pulling other chips out, etc.
The JDM programmer voltage is only for the PIC (or maybe other MCU's). 13v would most likely kill a 24xxx.

PP 11 of this:
http://ww1.microchip.com/downloads/e...Doc/31028a.pdf

Shows some driver board - would that be helpful ?

Thanks
Aftab

[skimask]

PP 11 of this:
http://ww1.microchip.com/downloads/e...Doc/31028a.pdf

Shows some driver board - would that be helpful ?

Thanks
Aftab

Have you got the datasheet for the 24xxx handy?