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#include <avr/interrupt.h>
#include <avr/io.h>
#include <avr/eeprom.h>
volatile unsigned char in_loop = 0;
volatile unsigned char complete = 1;
volatile unsigned long eep_value = 0;
typedef struct {
unsigned char dummy; // Addr. 0, don't use
unsigned char byte1;
unsigned short word1;
unsigned long long1;
} eep_t;
eep_t EEMEM eep = { 0, 0x33, 0x55AA, 0xDEADBEEF };
int main(void) {
do {
in_loop = 1;
switch(complete) {
case 0:
// wait till eeprom is ready again (for write operation)
if(eeprom_is_ready())
complete = 1;
case 1:
break;
case 2:
eep_value = eeprom_read_byte(&(eep.byte1));
complete = 1;
break;
case 3:
eep_value = eeprom_read_word((uint16_t *)&(eep.word1));
complete = 1;
break;
case 4:
eep_value = eeprom_read_dword(&(eep.long1));
complete = 1;
break;
case 5:
eeprom_write_byte(&(eep.byte1), 0x66);
complete = 0;
break;
case 6:
eeprom_write_word((uint16_t *)&(eep.word1), 0x1234);
complete = 0;
break;
case 7:
eeprom_write_dword(&(eep.long1), 0x55AAAA55);
complete = 0;
break;
}
} while(1); // do forever
}
// EOF
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