1 files changed, 33 insertions, 0 deletions
diff --git a/spaghetti-monster/fsm-random.c b/spaghetti-monster/fsm-random.c
new file mode 100644
index 0000000..1f83bce
--- /dev/null
+++ b/spaghetti-monster/fsm-random.c
@@ -0,0 +1,33 @@
+/*
+ * fsm-random.c: Random number generator 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_RANDOM_C
+#define FSM_RANDOM_C
+
+#ifdef USE_PSEUDO_RAND
+uint8_t pseudo_rand() {
+    static uint16_t offset = 1024;
+    // loop from 1024 to 4095
+    offset = ((offset + 1) & 0x0fff) | 0x0400;
+    pseudo_rand_seed += 0b01010101;  // 85
+    return pgm_read_byte(offset) + pseudo_rand_seed;
+}
+#endif
+
+#endif