save timezone setting in eeprom

code/inc/menu.h

@@ -1,7 +1,10 @@
 #include <stdint.h>
+#include <avr/eeprom.h>
 
 extern int8_t menu_val_timezone;
+extern int8_t menu_val_timezone_ee EEMEM;
 extern uint8_t menu_val_format;
+extern uint8_t menu_val_format_ee EEMEM;
 
 typedef enum {
     OFF,

code/src/main.c

@@ -1,6 +1,7 @@
 #include <avr/io.h>
-#include <util/delay.h>
+#include <avr/eeprom.h>
 #include <avr/interrupt.h>
+#include <util/delay.h>
 #include <stdlib.h>
 #include <string.h>
 #include "pinout.h"
@@ -88,6 +89,13 @@ void check_dip_switches() {
 }
 
 void setup(){
+    menu_val_timezone = eeprom_read_byte((uint8_t*)&menu_val_timezone_ee);
+    menu_val_format = eeprom_read_byte(&menu_val_format_ee);
+    if(menu_val_format != 24 && menu_val_format != 12){
+        menu_val_format = 24;
+        eeprom_write_byte(&menu_val_format_ee, menu_val_format);
+    }
+
     DDRA =   ENABLE_TUBE_SUPPLY;
 
     DDRB =   STATUS_LED_B

code/src/menu.c

@@ -5,8 +5,10 @@
 menu_state_t state = OFF;
 uint8_t selected = 0;
 
-int8_t menu_val_timezone = -1;
-uint8_t menu_val_format = 24;
+int8_t menu_val_timezone_ee EEMEM;
+int8_t menu_val_timezone;
+uint8_t menu_val_format_ee EEMEM;
+uint8_t menu_val_format;
 
 //void debug_menu(){
 //    printf("state:    %d\r\n", state);
@@ -21,11 +23,6 @@ uint8_t get_menu_active(){
     return 0;
 }
 
-const char *text[] = {
-    "test  ",
-    "  test"
-};
-
 void enter_menu(){
     switch(state){
         case OFF:
@@ -49,6 +46,7 @@ const char* get_menu_text(){
         switch(state){
             case TIMEZONE:
                 res = "      ";
+                menu_val_timezone = eeprom_read_byte((uint8_t*)&menu_val_timezone_ee);
                 if(menu_val_timezone < 0)
                     res[3] = '-';
                 else
@@ -92,6 +90,7 @@ void menu_up_down(uint8_t up_down){
                     menu_val_timezone = 12;
                 if(menu_val_timezone > 12)
                     menu_val_timezone = -12;
+                eeprom_write_byte((uint8_t*)&menu_val_timezone_ee, menu_val_timezone);
                 break;
             case FORMAT:
                 if(menu_val_format == 12)