pic16f877 Flash Memory C Code

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Tiwana6330

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Hi Everyone!

I have been using pic16f877 for last 2 years but for the first time I need to store some data into its Flash Memory. I use HiTech C compiler. Can anyone please give me a simple example code written in C to read and write Data to Flash Memory? Many thanks for your help
 

If you look in the <pic.h> file you will find:
'FLASH memory read/write/erase macros and function definitions'

Hi-Tech has done it for you, just call the functions.
 
Here you go.
This is one example, you can modify it to your need
Code: 
void save_data(int abc, int xyz)
{
    intToByte(abc, &byte1, &byte2);
    intToByte(xyz, &byte3, &byte4);

    EEPROM_WRITE(0x00, byte1);
    EEPROM_WRITE(0x01, byte2);
    EEPROM_WRITE(0x02, byte3);
    EEPROM_WRITE(0x03, byte4);
}
 

Thanks alot. I need to ask two questions

What is the function of this statement and is there a similar command for float varables (float to byte)?

intToByte(abc, &byte1, &byte2);
Click to expand...

Secondly, Whats the maximum address I can go upto? 0xFF? Thanks
 

Hi,

First I sugest you that you have 2 threads of the same topic. If you close one thread then it will be more clear to explain. I think you can understand better if it is in one single place instead of 2 place.

Thankyou
 

Tiwana6330 said:
Thanks alot. I need to ask two questions

What is the function of this statement and is there a similar command for float varables (float to byte)?



Secondly, Whats the maximum address I can go upto? 0xFF? Thanks
Click to expand...

Sorry missed pasting the function:

Code: 
int intToByte(int integer, unsigned char * byte1, unsigned char * byte2)
{
    *byte1 = (char)(integer >> 8);
    *byte2 = (char)(integer);

    return 0;
}

Code: 
int                     intToByte(int, unsigned char *, unsigned char *);
 

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