From 6d9ceae8eab62ba33011a82c8fad8e55d37fe7ba Mon Sep 17 00:00:00 2001
From: Selene ToyKeeper
Date: Sat, 26 Aug 2017 16:48:25 -0600
Subject: Added eeprom load/save API (no wear levelling yet), verified it works
 in DarkHorse.

---
 spaghetti-monster/fsm-eeprom.c | 71 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 spaghetti-monster/fsm-eeprom.c

(limited to 'spaghetti-monster/fsm-eeprom.c')

diff --git a/spaghetti-monster/fsm-eeprom.c b/spaghetti-monster/fsm-eeprom.c
new file mode 100644
index 0000000..5451baf
--- /dev/null
+++ b/spaghetti-monster/fsm-eeprom.c
@@ -0,0 +1,71 @@
+/*
+ * fsm-eeprom.c: EEPROM API for SpaghettiMonster.
+ *
+ * Copyright (C) 2017 Selene ToyKeeper
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef FSM_EEPROM_C
+#define FSM_EEPROM_C
+
+#include "fsm-eeprom.h"
+
+#if EEPROM_BYTES > 0
+#if EEPROM_BYTES >= (EEPSIZE/2)
+#error Requested EEPROM_BYTES too big.
+#endif
+uint8_t eeprom[EEPROM_BYTES];
+
+uint8_t load_eeprom() {
+    cli();
+    // check if eeprom has been initialized; abort if it hasn't
+    uint8_t marker = eeprom_read_byte((uint8_t *)EEP_START);
+    if (marker != EEP_MARKER) { sei(); return 0; }
+
+    // load the actual data
+    for(uint8_t i=0; i<EEPROM_BYTES; i++) {
+        eeprom[i] = eeprom_read_byte((uint8_t *)(EEP_START+1+i));
+    }
+    sei();
+    return 1;
+}
+
+void save_eeprom() {
+    cli();
+    eeprom_update_byte((uint8_t *)EEP_START, EEP_MARKER);
+
+    // save the actual data
+    for(uint8_t i=0; i<EEPROM_BYTES; i++) {
+        eeprom_update_byte((uint8_t *)(EEP_START+1+i), eeprom[i]);
+    }
+    sei();
+}
+#endif
+
+#if EEPROM_WL_BYTES > 0
+#if EEPROM_WL_BYTES >= (EEPSIZE/4)
+#error Requested EEPROM_WL_BYTES too big.
+#endif
+uint8_t eeprom_wl[EEPROM_WL_BYTES];
+
+uint8_t load_wl_eeprom() {
+}
+
+void save_wl_eeprom() {
+}
+#endif
+
+
+#endif
-- 
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