Serialize key states much more efficiently by using bits instead of bytes.

shared/bool_array_converter.c

@@ -0,0 +1,17 @@
+#include <string.h>
+#include "bool_array_converter.h"
+
+void BoolBytesToBits(uint8_t *srcBytes, uint8_t *dstBits, uint8_t byteCount)
+{
+    memset(dstBits, 0, byteCount/8 + 1);
+    for (uint8_t i=0; i<byteCount; i++) {
+        dstBits[i/8] |= (srcBytes[i] ? 1 : 0) << (i % 8);
+    }
+}
+
+void BoolBitsToBytes(uint8_t *srcBits, uint8_t *dstBytes, uint8_t byteCount)
+{
+    for (uint8_t i=0; i<byteCount; i++) {
+        dstBytes[i] = (srcBits[i/8] & (1 << (i % 8))) ? 1 : 0;
+    }
+}