how to use program memory to store and read data?

[garyzheng]

I use PIC16F873 to design a RF sensors. But the RAM space is to small for application. So i want to use ROM(program memory) for my data storage. But i am confused that what is the difference between read_program_eeprom and read_program_memory?

the follow is some part of my program to read or write program memory:


#ROM 0x0e00 = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00}
#ROM 0x0e10 = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00}
#ROM 0x0e20 = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00}
#ROM 0x0e30 = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00}
#ROM 0x0e40 = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00}
#ROM 0x0e50 = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00}

void read_rom()
{
int index;
printf("ID Number:");
index=0;
//read_program_memory(0x0e00,tx_buffer,11);
while(index<11)
{
putc(read_program_eeprom(index+0x0e00));
index++;
}
}

void write_rom()
{
index=0;
while(index<11)
{
//poll and delay for next character
write_program_eeprom(0x0e00+index,rx_buffer[index]);
// write_program_memory(0x0e00,rx_buffer,11);
index++;
}
}


please give me some idea on this topic, thank you:)

[Ttelmah]