altos/telelco-v2.0: A bit fancier with the drag-mode LED show

[fw/altos] / src / stmf0 / ao_crc.h

diff --git a/src/stmf0/ao_crc.h b/src/stmf0/ao_crc.h
index cd011d3ab724127b3491bba4083028af3f057951..b6d91023bde46e4fa8ba37df4a1647f850973d47 100644 (file)
--- a/src/stmf0/ao_crc.h
+++ b/src/stmf0/ao_crc.h
@@ -3,7 +3,8 @@
  *
  * 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; version 2 of the License.
+ * the Free Software Foundation; either version 2 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
@@ -34,7 +35,8 @@
 static inline uint16_t
 ao_crc_in_32_out_16(uint32_t v) {
        stm_crc.dr.u32 = v;
-       return stm_crc.dr.u16;
+       v = stm_crc.dr.u32;
+       return v ^ (v >> 16);
 }
 
 static inline uint16_t