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The project was continued by my colleague and I do not know her progress while I was transferred to another project.

Hi Ttelmah,

Already tested the code and it works perfectly. Thank you for that clever suggestions.

Hi Ttelmah,

I noticed the #use spi() has MODE=3 set. Why is so? Although AT25M02 supports both mode 0 and 3.

Now on using spi_xfer, I noticed you use the code snippet as:

Result = spi_xfer ...

Hi Ttelmah,

I ended up writing a HW-based implementation driver for AT25M02. Although I am not quite sure if I done it correctly. I just read the MSSP chapter of PIC18F8722 and the AT25M02 datashee ...

Hi Ttelmah,

I checked the sample source code of 25640 and yes they are similar to AT25M02 though the implementation is I think software SPI.

I will try this one although my final implementation ...

I am planning to create a driver for this device. What is the nearest SPI drivers included in CCS C compiler to start the development?

I saw from the included drivers folder, the device 9356SPI.
...

Hi Ttelmah,

You are right, I need to have #int method defined in order for the #build preprocessor to work. Here's the final code of the application firmware.

#include <18F8722.h>
#devi ...

Hi Ttelmah,

I created a simple application firmware that will align with what was discussed. Below is the application code and the bootloader header.

bootloader.h

#if !defined(__BOOTLOADE ...

Hi Ttelmah,

I checked the PIC18F8722 datasheet and I can't find Table 25-5 and my guess is you are referring to Figure 25-5 for code protected program memory organization.

Now, back to your sugg ...

Good day.

I am writing a bootloader firmware using a PIC18F8722 and I prefer the bootloader firmware be located at the end of the program memory space. Below is my suggested memory organization.
...