Basic Christmas light implementation!

1 files changed, 15 insertions, 0 deletions

diff --git a/include/byte_math.h b/include/byte_math.h
new file mode 100644
index 0000000..79f93b8
--- /dev/null
+++ b/include/byte_math.h
@@ -0,0 +1,15 @@
+#pragma once
+
+#include <stdint.h>
+
+/* Library for doing fast math functions using just uint8_t. */
+
+extern uint8_t sintable[256];
+
+/* Returns ((sin(n) + 1) / 2) * 255 */
+static inline uint8_t byte_sin(uint8_t n)
+{
+  return sintable[n];
+}
+
+uint8_t calc_w(uint8_t n);