diff -r 136a79772098 -r ff76255904c4 blackbox/main.h
--- a/blackbox/main.h	Sat Dec 03 16:42:53 2011 +0100
+++ b/blackbox/main.h	Mon Dec 05 17:14:32 2011 +0100
@@ -77,6 +77,8 @@
 #define TIMER2_DIVISOR  8
 #define VALUE2_50US     0.50e-4
 #define TIMER2_50US     (uint8_t)(VALUE2_50US * F_CPU/TIMER2_DIVISOR)
+#define VALUE2_250US    2.5e-4
+#define TIMER2_250US    (uint8_t)((VALUE2_250US * F_CPU/TIMER2_DIVISOR) - 2)
 
 #define TIMER1_DIVISOR  8
 #define VALUE1_7500NS   0.75e-2