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Code Releases Wiki Activity

added timer.device example

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This commit is contained in:
Wei-ju Wu
2013-02-27 14:35:07 -08:00
parent adc0ad456a
commit b3fd30c95b
3 changed files with 75 additions and 2 deletions
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58
devices/timer.c Normal file
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/*
* timer.c - Small example program to see how the timer.device
* works
*/
#include <stdio.h>
#include <stdlib.h>
#include <exec/types.h>
#include <exec/ports.h>
#include <devices/timer.h>
#include <clib/exec_protos.h>
#include <clib/alib_protos.h>
struct Library *TimerBase = NULL;
int main(int argc, char **argv)
{
struct MsgPort *timer_port = NULL;
struct timerequest *timer_io = NULL;
struct timeval time1;
ULONG mics, secs;
BYTE error = 0;
timer_port = CreatePort(NULL, 0);
if (!timer_port) {
printf("could not create message port\n");
return 0;
}
timer_io = (struct timerequest *) CreateExtIO(timer_port,
sizeof(struct timerequest));
if (!timer_io) {
printf("could not create create timerequest object\n");
DeletePort(timer_port);
return 0;
}
error = OpenDevice(TIMERNAME, UNIT_MICROHZ, (struct IORequest *) timer_io, 0);
if (error) {
printf("could not open timer.device\n");
} else {
TimerBase = (struct Library *) timer_io->tr_node.io_Device;
timer_io->tr_node.io_Command = TR_GETSYSTIME;
DoIO((struct IORequest *) timer_io);
mics = timer_io->tr_time.tv_micro;
secs = timer_io->tr_time.tv_secs;
printf("micros: %lu secs: %lu\n", mics, secs);
}
/* cleanup */
if (!CheckIO((struct IORequest *) timer_io)) {
AbortIO((struct IORequest *) timer_io);
}
WaitIO((struct IORequest *) timer_io);
TimerBase = NULL;
CloseDevice((struct IORequest *) timer_io);
if (timer_io) DeleteExtIO((struct IORequest *) timer_io);
if (timer_port) DeletePort(timer_port);
return 0;
}