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Optimise packet handling for SX1280 fast data rates

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Mark Qvist 2025-01-09 00:01:49 +01:00
parent 729a4099e5
commit 218a38adb7
4 changed files with 56 additions and 5 deletions
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12
Utilities.h
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@ -1101,12 +1101,20 @@ void updateBitrate() {
lora_bitrate = (uint32_t)(lora_sf * ( (4.0/(float)lora_cr) / ((float)(pow(2, lora_sf))/((float)lora_bw/1000.0)) ) * 1000.0);
lora_us_per_byte = 1000000.0/((float)lora_bitrate/8.0);
bool fast_rate = lora_bitrate > LORA_FAST_THRESHOLD_BPS;
lora_limit_rate = lora_bitrate > LORA_LIMIT_THRESHOLD_BPS;
int csma_slot_min_ms = CSMA_SLOT_MIN_MS;
float lora_preamble_target_ms = LORA_PREAMBLE_TARGET_MS;
if (fast_rate) { csma_slot_min_ms -= CSMA_SLOT_MIN_FAST_DELTA;
lora_preamble_target_ms -= LORA_PREAMBLE_FAST_DELTA; }
csma_slot_ms = lora_symbol_time_ms*CSMA_SLOT_SYMBOLS;
if (csma_slot_ms > CSMA_SLOT_MAX_MS) { csma_slot_ms = CSMA_SLOT_MAX_MS; }
if (csma_slot_ms < CSMA_SLOT_MIN_MS) { csma_slot_ms = CSMA_SLOT_MIN_MS; }
if (csma_slot_ms < CSMA_SLOT_MIN_MS) { csma_slot_ms = csma_slot_min_ms; }
difs_ms = CSMA_SIFS_MS + 2*csma_slot_ms;
float target_preamble_symbols = LORA_PREAMBLE_TARGET_MS/lora_symbol_time_ms;
float target_preamble_symbols = lora_preamble_target_ms/lora_symbol_time_ms;
if (target_preamble_symbols < LORA_PREAMBLE_SYMBOLS_MIN) { target_preamble_symbols = LORA_PREAMBLE_SYMBOLS_MIN; }
else { target_preamble_symbols = (ceil)(target_preamble_symbols); }