pic16f877 Flash Memory C Code

[Tiwana6330]

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

 

[btbass]

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.

 

[abidr]

Here you go.
This is one example, you can modify it to your need

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);
}

 

[Tiwana6330]

Here you go.
This is one example, you can modify it to your need

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);

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

 

[prmurthy]

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

 

[g_shyam1682]

Hi friend

I think, you can go for search in this forum for your problem.

i am suggest you one thread below for your problem.
i give sample code for read and write eeprom in Pic16f877a in MicroC IDE in that thread.

https://www.edaboard.com/threads/194428/#post814817

Hope this is help you
Shaym

 

[abidr]

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

Sorry missed pasting the function:

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

    return 0;
}

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