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how to write/read 16 bit data to internal eeprom

 
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butterfly



Joined: 04 Jun 2006
Posts: 35

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how to write/read 16 bit data to internal eeprom
PostPosted: Wed Sep 13, 2006 5:01 am     Reply with quote
hi:

i can write 8 bit date like ;

write_eeprom(0x00,volume);

but i could not write 16 bit data...

could you help me?
Ttelmah
Guest
PostPosted: Wed Sep 13, 2006 5:18 am     Reply with quote
16 bit data, is just two 8 bit bytes (this is how the processor stores it anyway). Look at the make8, and make16 functions (which allow the bytes to be seperated and rejoined).
An example of a generic 'bigger I/O' function, would be:
Code:

void write_eeprom_block(int16 ROM_addr, int8 * addr, int8 number_of_bytes) {
   int8 ctr;
   for (ctr=0;ctr<number_of_bytes;ctr++) {
      write_eeprom(ROM_addr++,*(addr++));
   }
}

//For your 'int16' volume value, call with:

write_eeprom_block(0x00,&volume,sizeof(volume));

The nice thing about this, is that the same function, will handle int32, int16, float etc..

Best Wishes
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