/**
* Sets the mode of an individual timer channel.
*
* Note that not all timers can be configured in every mode. For
* example, basic timers cannot be configured to output compare mode.
* Be sure to use a timer which is appropriate for the mode you want.
*
* @param dev Timer whose channel mode to set
* @param channel Relevant channel
* @param mode New timer mode for channel
*/
void timer_set_mode(timer_dev *dev, uint8 channel, timer_mode mode) {
ASSERT_FAULT(channel > 0 && channel <= 4);
/* TODO decide about the basic timers */
ASSERT(dev->type != TIMER_BASIC);
if (dev->type == TIMER_BASIC)
return;
switch (mode) {
case TIMER_DISABLED:
disable_channel(dev, channel);
break;
case TIMER_PWM:
pwm_mode(dev, channel);
break;
case TIMER_OUTPUT_COMPARE:
output_compare_mode(dev, channel);
break;
}
}
bool LoRaPHYUS915::set_next_channel(channel_selection_params_t* params,
uint8_t* channel, lorawan_time_t* time,
lorawan_time_t* aggregate_timeOff)
{
uint8_t nb_enabled_channels = 0;
uint8_t delay_tx = 0;
uint8_t enabled_channels[US915_MAX_NB_CHANNELS] = {0};
lorawan_time_t next_tx_delay = 0;
// Count 125kHz channels
if (num_active_channels(current_channel_mask, 0, 4) == 0) {
// If none of the 125 kHz Upstream channel found,
// Reactivate default channels
copy_channel_mask(current_channel_mask, channel_mask, 4);
}
// Check other channels
if (params->current_datarate >= DR_4) {
if ((current_channel_mask[4] & 0x00FF ) == 0) {
current_channel_mask[4] = channel_mask[4];
}
}
if (params->aggregate_timeoff <= _lora_time.get_elapsed_time(params->last_aggregate_tx_time)) {
// Reset Aggregated time off
*aggregate_timeOff = 0;
// Update bands Time OFF
next_tx_delay = update_band_timeoff(params->joined, params->dc_enabled, bands, US915_MAX_NB_BANDS);
// Search how many channels are enabled
nb_enabled_channels = enabled_channel_count(params->joined,
params->current_datarate,
current_channel_mask,
enabled_channels, &delay_tx);
} else {
delay_tx++;
next_tx_delay = params->aggregate_timeoff - _lora_time.get_elapsed_time(params->last_aggregate_tx_time);
}
if (nb_enabled_channels > 0) {
// We found a valid channel
*channel = enabled_channels[get_random( 0, nb_enabled_channels - 1 )];
// Disable the channel in the mask
disable_channel(current_channel_mask, *channel, US915_MAX_NB_CHANNELS - 8);
*time = 0;
return true;
} else {
if (delay_tx > 0) {
// Delay transmission due to AggregatedTimeOff or to a band time off
*time = next_tx_delay;
return true;
}
// Datarate not supported by any channel
*time = 0;
return false;
}
}
