use mbed-src latest version and everything works well. RTC is also fine.

Dependencies:   L3GD20 LIS3DH TextLCD mbed-rtos mbed

Use standard library mbed & mbed-rtos (GR-PEACH can run without mbed-src and special mbed-rtos).

Revision:
9:de986e74bd93
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-rtos.lib	Thu Feb 12 07:53:25 2015 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed-rtos/#ab4200083b07