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atspi-txrx: option -T <delta_MHz> to emit a constant wave

Browse Source 
- atspi-txrx/atspi-txrx.c (set_power): make enabling the CRC optional
  (this is necessary for test mode, which doesn't seem to work if the CRC
  is selected)
- atspi-txrx/atspi-txrx.c (test_mode): emit a constant wave in test mode
- atspi-txrx/atspi-txrx.c (usage, main): new option -T <delta> to emit a
  constant wave -2 MHz, -0.5 MHz, or +0.5 MHz from the nominal carrier
  frequency
This commit is contained in:
Werner Almesberger 2010-11-11 02:32:09 -03:00
parent 5d63a009c8
commit d4fe0277c2
1 changed files with 53 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

54
tools/atspi-txrx/atspi-txrx.c
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@ -81,7 +81,7 @@ static void set_channel(struct atspi_dsc *dsc, int channel)
}
static void set_power(struct atspi_dsc *dsc, double power)
static void set_power(struct atspi_dsc *dsc, double power, int crc)
{
int n;
@ -90,7 +90,7 @@ static void set_power(struct atspi_dsc *dsc, double power)
break;
if (fabs(tx_pwr[n]-power) > 0.01)
fprintf(stderr, "TX power %.1f dBm\n", tx_pwr[n]);
atspi_reg_write(dsc, REG_PHY_TX_PWR, TX_AUTO_CRC_ON | n);
atspi_reg_write(dsc, REG_PHY_TX_PWR, (crc ? TX_AUTO_CRC_ON : 0) | n);
}
@ -159,6 +159,29 @@ static void transmit(struct atspi_dsc *dsc, const char *msg, int times)
}
static void test_mode(struct atspi_dsc *dsc, uint8_t cont_tx)
{
atspi_buf_write(dsc, "", 1);
atspi_reg_write(dsc, REG_CONT_TX_0, CONT_TX_MAGIC);
atspi_reg_write(dsc, REG_CONT_TX_1, cont_tx);
if (!atspi_test_mode(dsc)) {
atspi_reset_rf(dsc);
fprintf(stderr, "device does not support test mode\n");
exit(1);
}
atspi_reg_write(dsc, REG_TRX_STATE, TRX_CMD_PLL_ON);
wait_for_interrupt(dsc, IRQ_PLL_LOCK, IRQ_PLL_LOCK, 10, 20);
atspi_reg_write(dsc, REG_TRX_STATE, TRX_CMD_TX_START);
while (run)
sleep(1);
atspi_reset_rf(dsc);
}
static void die(int sig)
{
run = 0;
@ -169,10 +192,13 @@ static void usage(const char *name)
{
fprintf(stderr,
"usage: %s [-c channel] [-p power] [-t trim] [message [repetitions]]\n"
" %s [-c channel] [-p power] [-t trim] -T delta\n"
" -c channel channel number, 11 to 26 (default %d)\n"
" -p power transmit power, -17.2 to 3.0 dBm (default %.1f)\n"
" -t trim trim capacitor, 0 to 15 (default 0)\n"
, name , DEFAULT_CHANNEL, DEFAULT_POWER);
" -t trim trim capacitor, 0 to 15 (default 0)\n"
" -T delta_MHz test mode. delta_MHz is -2, -0.5, or +0.5\n"
, name, name, DEFAULT_CHANNEL, DEFAULT_POWER);
exit(1);
}
@ -182,11 +208,12 @@ int main(int argc, char *const *argv)
int channel = DEFAULT_CHANNEL;
double power = DEFAULT_POWER;
int trim = 0, times = 1;
uint8_t cont_tx = 0;
char *end;
int c;
struct atspi_dsc *dsc;
while ((c = getopt(argc, argv, "c:p:t:")) != EOF)
while ((c = getopt(argc, argv, "c:p:t:T:")) != EOF)
switch (c) {
case 'c':
channel = strtoul(optarg, &end, 0);
@ -207,6 +234,16 @@ int main(int argc, char *const *argv)
if (trim > 15)
usage(*argv);
break;
case 'T':
if (!strcmp(optarg, "-2"))
cont_tx = CONT_TX_M2M;
else if (!strcmp(optarg, "-0.5"))
cont_tx = CONT_TX_M500K;
else if (!strcmp(optarg, "+0.5"))
cont_tx = CONT_TX_P500K;
else
usage(*argv);
break;
default:
usage(*argv);
}
@ -217,7 +254,12 @@ int main(int argc, char *const *argv)
case 0:
dsc = init_txrx(trim);
set_channel(dsc, channel);
if (!cont_tx)
receive(dsc);
else {
set_power(dsc, power, 0);
test_mode(dsc, cont_tx);
}
break;
case 2:
times = strtoul(argv[optind+1], &end, 0);
@ -225,9 +267,11 @@ int main(int argc, char *const *argv)
usage(*argv);
/* fall through */
case 1:
if (cont_tx)
usage(*argv);
dsc = init_txrx(trim);
set_channel(dsc, channel);
set_power(dsc, power);
set_power(dsc, power, 1);
transmit(dsc, argv[optind], times);
break;
default: