Source code added

e2promvars.c

@@ -0,0 +1,11 @@
+#include "e2promvars.h"
+
+void eeprom_setup(const _setup_rec * data, uint16_t size)
+{
+	_setup_rec rec;
+	for (_pointer ptr = (_pointer)data; ptr < ((_pointer)data) + size; ptr += sizeof(_setup_rec))
+	{
+		eeprom_read_block((_pointer)&rec, ptr, sizeof(rec));
+		*(rec.addr) = rec.value;
+	};
+}

e2promvars.h

@@ -0,0 +1,45 @@
+#ifndef _E2PROMVARS_
+#define _E2PROMVARS_
+
+#include <avr/eeprom.h>
+
+#define EEPROM_NAME(x)       eeprom_ ## x
+#define EEPROM_ADDRESS(x)    ((&EEPROM_NAME(x)))
+#define EEPROM_READ(x)       eeprom_read_block(&x, EEPROM_ADDRESS(x), sizeof(x))
+#define EEPROM_WRITE(x)      eeprom_write_block(&x, EEPROM_ADDRESS(x), sizeof(x))
+
+// can define var/eeprom var pair, defining an initial value: EEPROM_VAR (int a) = 0;
+#define EEPROM_VAR(var_type, var_name)\
+	var_type var_name;\
+	var_type EEPROM_NAME(var_name) EEMEM 
+
+#define VAR_FN(var_name) var_name ## Init
+
+// defines SRAM/EEPROM var pair with loading EEPROM into SRAM code just before main() call
+#define EEPROM_AUTO_VAR(var_type, var_name, var_value)     \
+	EEPROM_VAR(var_type, var_name) = var_value;            \
+	void VAR_FN(var_name) (void) __attribute__ ((naked))   \
+    __attribute__ ((section (".init8")));                  \
+	void VAR_FN(var_name) (void){EEPROM_READ(var_name);}      \
+
+#define EEPROM_SETUP(a,b) {addr:(uint8_t*)&(a), value:(b)}
+
+typedef struct { 
+		uint8_t	*addr;   
+		uint8_t	value;   
+} _setup_rec;
+
+typedef char* _pointer;
+
+// define device configuration: EEPROM_CONFIG(name)={EEPROM_SETUP(port, value), ...};
+#define EEPROM_CONFIG(name) _setup_rec name[] EEMEM
+
+#define EEPROM_CONFIG_ADR(name) &name[0]
+
+#define EEPROM_CONFIG_END(name) (EEPROM_CONFIG_ADR(name) + sizeof(name))
+
+#define EEPROM_CONFIGURE(name) eeprom_setup(&name[0], sizeof(name))
+
+void eeprom_setup(const _setup_rec * data, uint16_t size);
+
+#endif