giomba/nes-proj
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Unmodulated carrier transmission for cc2538

Browse Source 
Modified the cc2538 driver to enable the radio test
mode to emit unmodulated carriers (tones).
A carrier can be enabled using the normal radio driver
API:
NETSTACK_CONF_RADIO.set_value(
RADIO_PARAM_POWER_MODE,
RADIO_POWER_MODE_CARRIER_ON);

Once enabled, the carrier can be disabled like this:
NETSTACK_CONF_RADIO.set_value(
RADIO_PARAM_POWER_MODE,
RADIO_POWER_MODE_CARRIER_OFF);
This commit is contained in:
Carlos Pérez Penichet 2018-10-25 11:24:44 +02:00
parent feb1513b46
commit 79a4fe33a6
1 changed files with 57 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

59
arch/cpu/cc2538/dev/cc2538-rf.c
View File

@ -140,6 +140,8 @@ static const output_config_t output_power[] = {
{-24, 0x00 }, {-24, 0x00 },
}; };
static radio_result_t get_value(radio_param_t param, radio_value_t *value);
#define OUTPUT_CONFIG_COUNT (sizeof(output_power) / sizeof(output_config_t)) #define OUTPUT_CONFIG_COUNT (sizeof(output_power) / sizeof(output_config_t))
/* Max and Min Output Power in dBm */ /* Max and Min Output Power in dBm */
@ -394,6 +396,50 @@ get_sfd_timestamp(void)
return RTIMER_NOW() - RADIO_TO_RTIMER(timer_val - sfd); return RTIMER_NOW() - RADIO_TO_RTIMER(timer_val - sfd);
} }
/*---------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------*/
/* Enable or disable radio test mode emmiting modulated or unmodulated
* (carrier) signal. See datasheet page XX
*/
static uint32_t prev_FRMCTRL0, prev_MDMTEST1;
static uint8_t was_on;
static void
set_test_mode(uint8_t enable, uint8_t modulated)
{
radio_value_t mode;
get_value(RADIO_PARAM_POWER_MODE, &mode);
if (enable) {
if (mode == RADIO_POWER_MODE_CARRIER_ON) {
return;
}
was_on = (mode == RADIO_POWER_MODE_ON);
off();
prev_FRMCTRL0 = REG(RFCORE_XREG_FRMCTRL0);
// This constantly transmits random data
printf("FRMCTRL0: %08X\n", (unsigned int)prev_FRMCTRL0);
REG(RFCORE_XREG_FRMCTRL0) = 0x00000042;
if (!modulated) {
prev_MDMTEST1 = REG(RFCORE_XREG_MDMTEST1);
printf("MDMTEST1: %08X\n", (unsigned int)prev_MDMTEST1);
// ...adding this we send an unmodulated carrier instead
REG(RFCORE_XREG_MDMTEST1) = 0x00000018;
}
CC2538_RF_CSP_ISTXON();
} else {
if (mode != RADIO_POWER_MODE_CARRIER_ON) {
return;
}
CC2538_RF_CSP_ISRFOFF();
REG(RFCORE_XREG_FRMCTRL0) = prev_FRMCTRL0;
if (!modulated) {
REG(RFCORE_XREG_MDMTEST1) = prev_MDMTEST1;
}
if (was_on) {
on();
}
}
}
/*---------------------------------------------------------------------------*/
/* Netstack API radio driver functions */ /* Netstack API radio driver functions */
/*---------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------*/
static int static int
@ -806,8 +852,12 @@ get_value(radio_param_t param, radio_value_t *value)
switch(param) { switch(param) {
case RADIO_PARAM_POWER_MODE: case RADIO_PARAM_POWER_MODE:
*value = (REG(RFCORE_XREG_RXENABLE) && RFCORE_XREG_RXENABLE_RXENMASK) == 0 if ((REG(RFCORE_XREG_RXENABLE) & RFCORE_XREG_RXENABLE_RXENMASK) == 0) {
? RADIO_POWER_MODE_OFF : RADIO_POWER_MODE_ON; *value = RADIO_POWER_MODE_OFF;
} else {
*value = (REG(RFCORE_XREG_FRMCTRL0) & RFCORE_XREG_FRMCTRL0_TX_MODE) == 0
? RADIO_POWER_MODE_ON : RADIO_POWER_MODE_CARRIER_ON;
}
return RADIO_RESULT_OK; return RADIO_RESULT_OK;
case RADIO_PARAM_CHANNEL: case RADIO_PARAM_CHANNEL:
*value = (radio_value_t)get_channel(); *value = (radio_value_t)get_channel();
@ -895,6 +945,11 @@ set_value(radio_param_t param, radio_value_t value)
if(value == RADIO_POWER_MODE_OFF) { if(value == RADIO_POWER_MODE_OFF) {
off(); off();
return RADIO_RESULT_OK; return RADIO_RESULT_OK;
}
if(value == RADIO_POWER_MODE_CARRIER_ON ||
value == RADIO_POWER_MODE_CARRIER_OFF) {
set_test_mode((value == RADIO_POWER_MODE_CARRIER_ON), 0);
return RADIO_RESULT_OK;
} }
return RADIO_RESULT_INVALID_VALUE; return RADIO_RESULT_INVALID_VALUE;
case RADIO_PARAM_CHANNEL: case RADIO_PARAM_CHANNEL: