/// called to check temperature
///
static void temperature_update(void)
{
register int16_t diff;
if (radio_get_transmit_power() <= 20) {
duty_cycle_offset = 0;
return;
}
diff = radio_temperature() - MAX_PA_TEMPERATURE;
if (diff <= 0 && duty_cycle_offset > 0) {
// under temperature
duty_cycle_offset -= 1;
} else if (diff > 10) {
// getting hot!
duty_cycle_offset += 10;
} else if (diff > 5) {
// well over temperature
duty_cycle_offset += 5;
} else if (diff > 0) {
// slightly over temperature
duty_cycle_offset += 1;
}
// limit to minimum of 20% duty cycle to ensure link stays up OK
if ((duty_cycle-duty_cycle_offset) < 20) {
duty_cycle_offset = duty_cycle - 20;
}
}
bool
param_set(__data enum ParamID param, __pdata param_t value)
{
// Sanity-check the parameter value first.
if (!param_check(param, value))
return false;
// some parameters we update immediately
switch (param) {
case PARAM_TXPOWER:
// useful to update power level immediately when range
// testing in RSSI mode
radio_set_transmit_power(value);
value = radio_get_transmit_power();
break;
case PARAM_DUTY_CYCLE:
// update duty cycle immediately
value = constrain(value, 0, 100);
duty_cycle = value;
break;
case PARAM_LBT_RSSI:
// update LBT RSSI immediately
if (value != 0) {
value = constrain(value, 25, 220);
}
lbt_rssi = value;
break;
case PARAM_MAVLINK:
feature_mavlink_framing = (uint8_t) value;
value = feature_mavlink_framing;
break;
case PARAM_OPPRESEND:
feature_opportunistic_resend = value?true:false;
value = feature_opportunistic_resend?1:0;
break;
case PARAM_RTSCTS:
feature_rtscts = value?true:false;
value = feature_rtscts?1:0;
break;
default:
break;
}
parameter_values[param].val = value;
return true;
}
static void
radio_init(void)
{
__pdata uint32_t freq_min, freq_max;
__pdata uint32_t channel_spacing;
__pdata uint8_t txpower;
// Do generic PHY initialisation
if (!radio_initialise()) {
panic("radio_initialise failed");
}
switch (g_board_frequency) {
case FREQ_433:
freq_min = 433050000UL;
freq_max = 434790000UL;
txpower = 10;
num_fh_channels = 10;
break;
case FREQ_470:
freq_min = 470000000UL;
freq_max = 471000000UL;
txpower = 10;
num_fh_channels = 10;
break;
case FREQ_868:
freq_min = 868000000UL;
freq_max = 869000000UL;
txpower = 10;
num_fh_channels = 10;
break;
case FREQ_915:
freq_min = 915000000UL;
freq_max = 928000000UL;
txpower = 20;
num_fh_channels = MAX_FREQ_CHANNELS;
break;
default:
freq_min = 0;
freq_max = 0;
txpower = 0;
panic("bad board frequency %d", g_board_frequency);
break;
}
if (param_get(PARAM_NUM_CHANNELS) != 0) {
num_fh_channels = param_get(PARAM_NUM_CHANNELS);
}
if (param_get(PARAM_MIN_FREQ) != 0) {
freq_min = param_get(PARAM_MIN_FREQ) * 1000UL;
}
if (param_get(PARAM_MAX_FREQ) != 0) {
freq_max = param_get(PARAM_MAX_FREQ) * 1000UL;
}
if (param_get(PARAM_TXPOWER) != 0) {
txpower = param_get(PARAM_TXPOWER);
}
// constrain power and channels
txpower = constrain(txpower, BOARD_MINTXPOWER, BOARD_MAXTXPOWER);
num_fh_channels = constrain(num_fh_channels, 1, MAX_FREQ_CHANNELS);
// double check ranges the board can do
switch (g_board_frequency) {
case FREQ_433:
freq_min = constrain(freq_min, 414000000UL, 460000000UL);
freq_max = constrain(freq_max, 414000000UL, 460000000UL);
break;
case FREQ_470:
freq_min = constrain(freq_min, 450000000UL, 490000000UL);
freq_max = constrain(freq_max, 450000000UL, 490000000UL);
break;
case FREQ_868:
freq_min = constrain(freq_min, 849000000UL, 889000000UL);
freq_max = constrain(freq_max, 849000000UL, 889000000UL);
break;
case FREQ_915:
freq_min = constrain(freq_min, 868000000UL, 935000000UL);
freq_max = constrain(freq_max, 868000000UL, 935000000UL);
break;
default:
panic("bad board frequency %d", g_board_frequency);
break;
}
if (freq_max == freq_min) {
freq_max = freq_min + 1000000UL;
}
// get the duty cycle we will use
duty_cycle = param_get(PARAM_DUTY_CYCLE);
duty_cycle = constrain(duty_cycle, 0, 100);
param_set(PARAM_DUTY_CYCLE, duty_cycle);
// get the LBT threshold we will use
lbt_rssi = param_get(PARAM_LBT_RSSI);
if (lbt_rssi != 0) {
// limit to the RSSI valid range
lbt_rssi = constrain(lbt_rssi, 25, 220);
}
param_set(PARAM_LBT_RSSI, lbt_rssi);
// sanity checks
param_set(PARAM_MIN_FREQ, freq_min/1000);
param_set(PARAM_MAX_FREQ, freq_max/1000);
param_set(PARAM_NUM_CHANNELS, num_fh_channels);
channel_spacing = (freq_max - freq_min) / (num_fh_channels+2);
// add half of the channel spacing, to ensure that we are well
// away from the edges of the allowed range
freq_min += channel_spacing/2;
// add another offset based on network ID. This means that
// with different network IDs we will have much lower
// interference
srand(param_get(PARAM_NETID));
if (num_fh_channels > 5) {
freq_min += ((unsigned long)(rand()*625)) % channel_spacing;
}
debug("freq low=%lu high=%lu spacing=%lu\n",
freq_min, freq_min+(num_fh_channels*channel_spacing),
channel_spacing);
// set the frequency and channel spacing
// change base freq based on netid
radio_set_frequency(freq_min);
// set channel spacing
radio_set_channel_spacing(channel_spacing);
// start on a channel chosen by network ID
radio_set_channel(param_get(PARAM_NETID) % num_fh_channels);
// And intilise the radio with them.
if (!radio_configure(param_get(PARAM_AIR_SPEED)) &&
!radio_configure(param_get(PARAM_AIR_SPEED)) &&
!radio_configure(param_get(PARAM_AIR_SPEED))) {
panic("radio_configure failed");
}
// report the real air data rate in parameters
param_set(PARAM_AIR_SPEED, radio_air_rate());
// setup network ID
radio_set_network_id(param_get(PARAM_NETID));
// setup transmit power
radio_set_transmit_power(txpower);
// report the real transmit power in settings
param_set(PARAM_TXPOWER, radio_get_transmit_power());
#ifdef USE_RTC
// initialise real time clock
rtc_init();
#endif
// initialise frequency hopping system
fhop_init(param_get(PARAM_NETID));
// initialise TDM system
tdm_init();
}
