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Use getopt in atspi-rssi.c

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- atspi-rssi/atspi-rssi.c (main): use getopt
- atspi-rssi/atspi-rssi.c (usage, main): introduce option -n to select
  number-of-sweeps mode (default)
This commit is contained in:
Werner Almesberger 2010-11-08 16:22:39 -03:00
parent 4c905300d3
commit a7a94b85cd
1 changed files with 21 additions and 10 deletions
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31
tools/atspi-rssi/atspi-rssi.c
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@ -13,6 +13,7 @@
#include <stdlib.h> #include <stdlib.h>
#include <stdio.h> #include <stdio.h>
#include <unistd.h>
#include <signal.h> #include <signal.h>
#include <sys/time.h> #include <sys/time.h>
@ -35,10 +36,6 @@ static void sweep(struct atspi_dsc *dsc)
/* 150 us, according to AVR2001 section 3.5 */ /* 150 us, according to AVR2001 section 3.5 */
wait_for_interrupt(dsc, IRQ_PLL_LOCK, IRQ_PLL_LOCK, 10, 20); wait_for_interrupt(dsc, IRQ_PLL_LOCK, IRQ_PLL_LOCK, 10, 20);
/*
* No need to explicitly wait for the PPL lock - going USB-SPI
* is pretty slow, leaving the transceiver plenty of time.
*/
gettimeofday(&t, NULL); gettimeofday(&t, NULL);
rssi = atspi_reg_read(dsc, REG_PHY_RSSI) & RSSI_MASK; rssi = atspi_reg_read(dsc, REG_PHY_RSSI) & RSSI_MASK;
t.tv_sec -= t0.tv_sec; t.tv_sec -= t0.tv_sec;
@ -60,22 +57,36 @@ static void die(int sig)
static void usage(const char *name) static void usage(const char *name)
{ {
fprintf(stderr, "usage: %s sweeps \n", name); fprintf(stderr,
"usage: %s [-n] sweeps\n", name);
exit(1); exit(1);
} }
int main(int argc, const char **argv) int main(int argc, char **argv)
{ {
struct atspi_dsc *dsc; struct atspi_dsc *dsc;
unsigned long sweeps, i; unsigned long sweeps, i;
char *end; char *end;
int c;
if (argc != 2) while ((c = getopt(argc, argv, "n")) != EOF)
usage(*argv); switch (c) {
sweeps = strtoul(argv[1], &end, 0); case 'n':
if (*end) break;
default:
usage(*argv);
}
switch (argc-optind) {
case 1:
sweeps = strtoul(argv[optind], &end, 0);
if (*end)
usage(*argv);
break;
default:
usage(*argv); usage(*argv);
}
signal(SIGINT, die); signal(SIGINT, die);