4 * Copyright 2005 Develer S.r.l. (http://www.develer.com/)
5 * This file is part of DevLib - See README.devlib for information.
10 * \author Bernardo Innocenti <bernie@develer.com>
12 * \brief Low-level timer module for Qt emulator (implementation).
17 *#* Revision 1.4 2006/02/17 22:24:21 bernie
18 *#* Update POSIX timer emulator.
20 *#* Revision 1.3 2006/02/10 12:34:52 bernie
21 *#* Remove spurious EXTERN_C.
23 *#* Revision 1.2 2006/01/16 03:30:21 bernie
24 *#* Make header C++ friendly.
26 *#* Revision 1.1 2005/11/27 03:58:18 bernie
27 *#* Add POSIX timer emulator.
29 *#* Revision 1.1 2005/11/27 03:06:36 bernie
30 *#* Qt timer emulation.
34 #include <cfg/compiler.h> // hptime.t
35 #include <os/hptime.h>
37 #include <signal.h> // sigaction()
38 #include <sys/time.h> // setitimer()
39 #include <string.h> // memset()
42 // Forward declaration for the user interrupt server routine.
45 /// HW dependent timer initialization.
46 static void timer_hw_init(void)
49 memset(&sa, 0, sizeof(sa));
51 // Setup interrupt callback
52 sa.sa_handler = timer_isr;
53 sigemptyset(&sa.sa_mask);
54 sigaddset(&sa.sa_mask, SIGALRM);
55 sa.sa_flags = SA_RESTART;
56 sigaction(SIGALRM, &sa, NULL);
58 // Setup POSIX realtime timer to interrupt every 10ms.
59 static struct itimerval itv =
61 { 0, 1000 / TIMER_TICKS_PER_MSEC }, /* it_interval */
62 { 0, 1000 / TIMER_TICKS_PER_MSEC } /* it_value */
64 setitimer(ITIMER_REAL, &itv, NULL);
67 INLINE hptime_t timer_hw_hpread(void)