To me84108:

Thank you so much, that is what I want.

Yeah!!! The more things I do, the more troubles I have
to facing....

Right now, one serious problem that I have to understand,, but I am not sure whether my thought is
right or not:

since the IC on the target board is blank one, that is, it can not do anything, and only receive data (by RB7) and accompany with clock (RB6). So I have to transfer the data by certain format and instractions.

I read programming specification for this, It told me the TABLE POINTER command, the format, is that:

the original format is: (from P6 of DS39576B)

Table write (4 bits command ) +Data payload (16 bits)
1101 3C40

And once it is transfering, should be convert to:
1011 0000 0010 0011 1100

-------------------------------------------------
So, one of my question is the relationship between 'Data payload ' and one line in the hex file.

such as:

:0C02F400FF30860083168500860183120F (From P22 of DS00732A)

1) '02F4' is address (for TBLPTRU, TBLPTRH, TBLPTRL)
'FF3086008316850086018312' is data payload,
correct? I am not sure.....

2) Do I need to change the position of each bit when I
pass this data into target board through my 'ICD'.


Thanks for all your help.

To me84108:

Thanks for your reply.

Actually, I just want to try how to build a programmer
by myself, currently, I have a CCS ICD-U40.
personally, it should be easy to make, but I do not know so far.

by the way, I'v already read some information about Bootloader, they let me know many fresh things.

Currently, I am reading 'Flash microcontroller Programming specification for pic18f', but I still do not know how to use the famous command - TABLE POINTER, to control target board by my-ICD, that is, Once I get one line Hex code, how to transfer this to target board using table write....

Anyway, Thanks for your help.

39576b.pdf

I read this file already, but I still do not know how to do.

please help me~~~~

All table commands are 4 bits Instruction, such
as : '1100' is Table write, and folowing 16 bits Data
Payload, but I donot know what should I put into this
16 bits? Is it from Hex file?

So, can you give me a simple example?

Thanks a lot!參照：