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tools/atrf-txrx/atrf-txrx.c: new option -R for RTT measurement mode

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This is similar to ping (-P) but separates roles more clearly and
collects timing statistics instead of visualizing reception.
This commit is contained in:
Werner Almesberger 2013-02-12 20:07:21 -03:00
parent 49ca503cab
commit c19fccf17c
1 changed files with 111 additions and 3 deletions
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114
tools/atrf-txrx/atrf-txrx.c
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@ -67,6 +67,7 @@ enum mode {
mode_hmac,
mode_per,
mode_ping,
mode_rtt,
mode_cont_tx,
};
@ -452,6 +453,84 @@ static void ping(struct atrf_dsc *dsc, double max_wait_s, int master)
}
/* ----- Round-trip time --------------------------------------------------- */
static void rtt_slave(struct atrf_dsc *dsc)
{
uint8_t buf[MAX_PSDU];
int n;
while (run) {
atrf_reg_write(dsc, REG_TRX_STATE, TRX_CMD_RX_ON);
wait_for_interrupt(dsc, IRQ_TRX_END,
IRQ_TRX_END | IRQ_RX_START | IRQ_PLL_LOCK | IRQ_AMI, 0);
if (!run)
break;
n = atrf_buf_read(dsc, buf, sizeof(buf));
if (n < 0)
exit(1);
if (n < 2) {
fprintf(stderr, "%d bytes received\n", n);
continue;
}
atrf_reg_write(dsc, REG_TRX_STATE, TRX_CMD_PLL_ON);
atrf_buf_write(dsc, buf, n);
atrf_reg_write(dsc, REG_TRX_STATE, TRX_CMD_TX_START);
wait_for_interrupt(dsc, IRQ_TRX_END,
IRQ_TRX_END | IRQ_PLL_LOCK, 10);
}
}
static void rtt_master(struct atrf_dsc *dsc, int packets, int size)
{
uint8_t buf[size+2]; /* +CRC */
struct timeval t0, t1;
uint8_t irq;
int first = 1;
double min = 0, max = 0, sum = 0, sum2 = 0, d;
int lost = 0, n;
int i;
memset(buf, 0, size+2);
for (i = 0; i != packets; i++) {
atrf_reg_write(dsc, REG_TRX_STATE, TRX_CMD_PLL_ON);
atrf_buf_write(dsc, buf, size+2);
gettimeofday(&t0, NULL);
atrf_reg_write(dsc, REG_TRX_STATE, TRX_CMD_TX_START);
wait_for_interrupt(dsc, IRQ_TRX_END,
IRQ_TRX_END | IRQ_PLL_LOCK, 10);
atrf_reg_write(dsc, REG_TRX_STATE, TRX_CMD_RX_ON);
irq = wait_for_interrupt(dsc, IRQ_TRX_END,
IRQ_TRX_END | IRQ_RX_START | IRQ_PLL_LOCK | IRQ_AMI, 1000);
if (irq) {
gettimeofday(&t1, NULL);
d = t1.tv_sec-t0.tv_sec+(t1.tv_usec-t0.tv_usec)*1e-6;
sum += d;
sum2 += d*d;
if (first || d < min)
min = d;
if (first || d > max)
max = d;
first = 0;
n = atrf_buf_read(dsc, buf, size);
if (n != size)
fprintf(stderr, "%d bytes received\n", n);
} else {
lost++;
}
}
n = packets-lost;
printf("%d sent, %d received, %d lost (%g%%)\n",
packets, n, lost, lost*100.0/packets);
if (n)
printf("rtt min/avg/max = %.3f/%.3f/%.3f ms, mdev = %.3f ms\n",
min*1000.0, sum*1000.0/n, max*1000.0,
sqrt((sum2-sum*sum/n)/n)*1000.0);
}
/* ----- Continuous wave test ---------------------------------------------- */
@ -490,6 +569,7 @@ static void usage(const char *name)
" %s [common_options] -H [message]\n"
" %s [common_options] -E pause_s [repetitions]\n"
" %s [common_options] -P [max_wait_s]\n"
" %s [common_options] -R [packets size]\n"
" %s [common_options] -T offset [command]\n\n"
" text message mode:\n"
" message message string to send (if absent, receive)\n"
@ -503,6 +583,10 @@ static void usage(const char *name)
" Ping-pong mode:\n"
" -P exchange packets between two stations\n"
" max_wait_s generate a new packet if no response is received (master)\n\n"
" Round-trip time measurement:\n"
" -R send/receive RTT measurement packets\n"
" packets number of packets to send (master)\n"
" size size of packets in bytes\n"
" constant wave test mode (transmit only):\n"
" -T offset test mode. offset is the frequency offset of the constant\n"
" wave in MHz: -2, -0.5, or +0.5\n"
@ -519,7 +603,7 @@ static void usage(const char *name)
" -p power transmit power, -17.2 to 3.0 dBm (default %.1f)\n"
" -r rate data rate, 250k, 500k, 1M, or 2M (default: 250k)\n"
" -t trim trim capacitor, 0 to 15 (default %d)\n"
, name, name, name, name, name,
, name, name, name, name, name, name,
DEFAULT_CHANNEL, atrf_default_driver_name(),
2405+5*(DEFAULT_CHANNEL-11), DEFAULT_POWER,
DEFAULT_TRIM);
@ -545,7 +629,7 @@ int main(int argc, char *const *argv)
int channel = DEFAULT_CHANNEL;
double power = DEFAULT_POWER;
uint8_t rate = OQPSK_DATA_RATE_250;
int trim = DEFAULT_TRIM, times = 1;
int trim = DEFAULT_TRIM, times = 1, bytes;
uint8_t cont_tx = 0;
double pause_s = 0;
char *end;
@ -555,7 +639,7 @@ int main(int argc, char *const *argv)
const char *pcap_file = NULL;
struct atrf_dsc *dsc;
while ((c = getopt(argc, argv, "c:C:d:E:f:Ho:p:Pr:t:T:")) != EOF)
while ((c = getopt(argc, argv, "c:C:d:E:f:Ho:p:Pr:Rt:T:")) != EOF)
switch (c) {
case 'c':
channel = strtoul(optarg, &end, 0);
@ -616,6 +700,9 @@ int main(int argc, char *const *argv)
else
usage(*argv);
break;
case 'R':
set_mode(&mode, mode_rtt);
break;
case 't':
trim = strtoul(optarg, &end, 0);
if (*end)
@ -660,6 +747,10 @@ int main(int argc, char *const *argv)
set_power_dBm(dsc, power, 1);
ping(dsc, pause_s, 0);
break;
case mode_rtt:
set_power_dBm(dsc, power, 1);
rtt_slave(dsc);
break;
case mode_cont_tx:
set_power_dBm(dsc, power, 0);
status = test_mode(dsc, cont_tx, NULL);
@ -678,6 +769,19 @@ int main(int argc, char *const *argv)
/* fall through */
case mode_cont_tx:
usage(*argv);
case mode_rtt:
times = strtoul(argv[optind], &end, 0);
if (*end)
usage(*argv);
bytes = strtoul(argv[optind+1], &end, 0);
if (*end)
usage(*argv);
dsc = init_txrx(driver, trim, clkm);
set_channel(dsc, channel);
set_rate(dsc, rate);
set_power_dBm(dsc, power, 1);
rtt_master(dsc, times, bytes);
goto done;
default:
abort();
}
@ -712,6 +816,9 @@ int main(int argc, char *const *argv)
set_power_dBm(dsc, power, 1);
ping(dsc, pause_s, 1);
break;
case mode_rtt:
usage(*argv);
break;
case mode_cont_tx:
set_power_dBm(dsc, power, 0);
status = test_mode(dsc, cont_tx, argv[optind]);
@ -724,6 +831,7 @@ int main(int argc, char *const *argv)
default:
usage(*argv);
}
done:
atrf_close(dsc);