drjones/car-key-killer
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Fix Flood jam: use transmit() not startTransmit; volatile pulse flag in noise ISR

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startTransmit+next tick standby aborted packets before air complete.
ISR must not read jamMode; use s_noiseIsPulse set in noiseGenStart.

Made-with: Cursor
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drjones
2026-04-01 21:31:49 -07:00
parent cc4aef445a
commit 88f3d4d442
1 changed files with 9 additions and 4 deletions
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13
src/main.cpp
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@@ -87,6 +87,8 @@ static float jamFreq2 = JAM_LOCK_FREQ_2_MHZ;
// Gate LFSR ISR so GDO0 is only toggled for radios in direct async TX (avoids driving idle CC1101).
static volatile bool s_noiseEn1 = false;
static volatile bool s_noiseEn2 = false;
// ISR must not read jamMode (non-atomic); noiseGenStart sets this for PULSE vs PRNG.
static volatile bool s_noiseIsPulse = false;
// Auto-reinit watchdog
static uint32_t lastReInitCheck = 0;
@@ -1075,16 +1077,17 @@ static void jamFloodTick() {
(void)radio2.transmit(pkt, 60);
}
} else {
// Flood mode: 64-byte payload, 2ms wait, async transmit.
// Flood: full transmit() — startTransmit() without finishTransmit() was aborting
// each packet on the next tick (standby() at start of TX), so almost no on-air energy.
if ((uint32_t)(millis() - lastMs) < 2u) return;
if (radio1Status == 2) {
esp_fill_random(pkt, sizeof(pkt));
(void)radio1.startTransmit(pkt, sizeof(pkt));
(void)radio1.transmit(pkt, sizeof(pkt));
}
if (radio2Status == 2) {
esp_fill_random(pkt, sizeof(pkt));
(void)radio2.startTransmit(pkt, sizeof(pkt));
(void)radio2.transmit(pkt, sizeof(pkt));
}
}
@@ -1557,7 +1560,7 @@ static inline IRAM_ATTR uint32_t lfsrStep(uint32_t s) {
}
static void IRAM_ATTR noiseISR() {
if (jamMode == JamMode::PULSE) {
if (s_noiseIsPulse) {
static uint32_t pulseToggle = 0;
pulseToggle ^= 1;
if (s_noiseEn1) gpio_set_level((gpio_num_t)CC1101_1_GDO0, pulseToggle);
@@ -1585,6 +1588,8 @@ static void noiseGenStart() {
s_lfsr = esp_random();
if (s_lfsr == 0) s_lfsr = 0xDEADBEEFu; // LFSR must never be zero
s_noiseIsPulse = (jamMode == JamMode::PULSE);
pinMode(CC1101_1_GDO0, OUTPUT);
pinMode(CC1101_2_GDO0, OUTPUT);