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};
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};
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// -----------------------------------------------------------
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// -----------------------------------------------------------
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// Update display buffer
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// Update display buffer
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// -----------------------------------------------------------
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// -----------------------------------------------------------
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void JetiBox_Update(unsigned char key)
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unsigned char JetiBox_Update(unsigned char key)
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{
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{
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        static uint8_t item = 0, last_item = 0; // the menu item
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        static uint8_t item = 0, last_item = 0; // the menu item
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        // navigate within the menu by key action
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        // navigate within the menu by key action
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        last_item = item;
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        last_item = item;
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        switch(key)
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        switch(key)
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        {
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        {
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                case JETIBOX_KEY_LEFT:
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                case JETIBOX_KEY_LEFT:
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                        if (item == 0) return (1);                                                                      // switch back to jeti expander menu
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                        item = pgm_read_byte(&JetiBox_Menu[item].left);         //trigger to left menu item
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                         else item = pgm_read_byte(&JetiBox_Menu[item].left);           //trigger to left menu item
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                        break;
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                        break;
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                case JETIBOX_KEY_RIGHT:
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                case JETIBOX_KEY_RIGHT:
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                        item = pgm_read_byte(&JetiBox_Menu[item].right);        //trigger to right menu item
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                        item = pgm_read_byte(&JetiBox_Menu[item].right);        //trigger to right menu item
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        if(item != last_item) key = JETIBOX_KEY_UNDEF;
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        if(item != last_item) key = JETIBOX_KEY_UNDEF;
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        LIBFC_JetiBox_Clear();
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        LIBFC_JetiBox_Clear();
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        //execute menu item handler
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        //execute menu item handler
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        ((pFctMenu)(pgm_read_word(&(JetiBox_Menu[item].pHandler))))(key);
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        ((pFctMenu)(pgm_read_word(&(JetiBox_Menu[item].pHandler))))(key);
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        return (0);