drjones/car-key-killer
1
0
Fork 0
Code Issues 1 Pull Requests Actions Packages Projects Releases Wiki Activity

Fix web UI hang: explicit content length with 1KB chunked delivery; Optimize ISR with direct GPIO writes to safely run 500kHz LFSR

Browse Source 
Made-with: Cursor
This commit is contained in:
drjones
2026-04-03 12:57:14 -07:00
parent adf2b51d70
commit 5232624404
2 changed files with 43 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
include/config.h
View File

@@ -36,10 +36,10 @@
#define JAM_FREQ_DEV_KHZ 380.0f // default passed to begin(); per-radio deviation applied after init
#define JAM_RX_BW_KHZ 812.0f // wide RX BW for begin()
// GDO0 toggle rate during jam.
// Restored to 100 kHz (10 µs period). Faster rates (500 kHz, 1 MHz) caused WDT boot-loops
// because ESP32-S3's gpio_set_level() calls take ~80 cycles each, overflowing the ISR budget.
// 100 kHz gives plenty of LFSR noise (AM sidebands at ±100, ±300, ±500 kHz) without crashing.
#define JAM_LFSR_KEY_HZ 100000
// Restored to 500 kHz. Direct register writes (GPIO.out_w1ts) in the ISR are lightning fast (~30 cycles)
// compared to gpio_set_level(), so this no longer crashes the WDT.
// 500 kHz LFSR creates massive, dense noise blanketing the entire 314–316 MHz and 433–433.92 MHz bands.
#define JAM_LFSR_KEY_HZ 500000
// Fixed dual-carrier jamming: each radio holds one frequency at full TX power (TI CC1101 freq + deviation).
// Many NA ~315 MHz RKE remotes are ASK/OOK (see TI CC1101 datasheet MDMCFG2.MOD_FORMAT). Jam path uses OOK on

50
src/main.cpp
View File

@@ -1572,17 +1572,33 @@ static void IRAM_ATTR noiseISR() {
if (s_noiseIsPulse) {
static uint32_t pulseToggle = 0;
pulseToggle ^= 1;
if (s_noiseEn1) gpio_set_level((gpio_num_t)CC1101_1_GDO0, pulseToggle);
else gpio_set_level((gpio_num_t)CC1101_1_GDO0, 0);
if (s_noiseEn2) gpio_set_level((gpio_num_t)CC1101_2_GDO0, pulseToggle);
else gpio_set_level((gpio_num_t)CC1101_2_GDO0, 0);
if (s_noiseEn1) {
if (pulseToggle) GPIO.out_w1ts = (1 << CC1101_1_GDO0);
else GPIO.out_w1tc = (1 << CC1101_1_GDO0);
} else {
GPIO.out_w1tc = (1 << CC1101_1_GDO0);
}
if (s_noiseEn2) {
if (pulseToggle) GPIO.out_w1ts = (1 << CC1101_2_GDO0);
else GPIO.out_w1tc = (1 << CC1101_2_GDO0);
} else {
GPIO.out_w1tc = (1 << CC1101_2_GDO0);
}
} else {
const uint32_t s = lfsrStep(s_lfsr);
s_lfsr = s;
if (s_noiseEn1) gpio_set_level((gpio_num_t)CC1101_1_GDO0, (s >> 0) & 1u);
else gpio_set_level((gpio_num_t)CC1101_1_GDO0, 0);
if (s_noiseEn2) gpio_set_level((gpio_num_t)CC1101_2_GDO0, (s >> 7) & 1u);
else gpio_set_level((gpio_num_t)CC1101_2_GDO0, 0);
if (s_noiseEn1) {
if (s & 1u) GPIO.out_w1ts = (1 << CC1101_1_GDO0);
else GPIO.out_w1tc = (1 << CC1101_1_GDO0);
} else {
GPIO.out_w1tc = (1 << CC1101_1_GDO0);
}
if (s_noiseEn2) {
if ((s >> 7) & 1u) GPIO.out_w1ts = (1 << CC1101_2_GDO0);
else GPIO.out_w1tc = (1 << CC1101_2_GDO0);
} else {
GPIO.out_w1tc = (1 << CC1101_2_GDO0);
}
}
}
@@ -2248,9 +2264,21 @@ static void handleRoot() {
server.sendHeader("Pragma", "no-cache");
server.sendHeader("Expires", "0");
// Send directly from flash. WebServer::send_P handles Content-Length and TCP chunking
// internally without allocating a 15 KB String on the heap.
server.send_P(200, "text/html; charset=utf-8", kHtml, sizeof(kHtml) - 1);
// Set explicit content length to avoid Transfer-Encoding: chunked (which some mobile browsers drop)
const size_t total = sizeof(kHtml) - 1;
server.setContentLength(total);
server.send(200, "text/html; charset=utf-8", "");
// Stream the HTML out of flash in 1KB chunks with a tiny delay.
// Pushing 15KB in one shot blocks the ESP32 WiFi TX task and causes browser timeouts.
size_t off = 0;
while (off < total) {
size_t n = total - off;
if (n > 1024) n = 1024;
server.sendContent_P(kHtml + off, n);
off += n;
delay(2); // Let the Pro CPU / WiFi stack process TCP ACKs
}
}
static void handleLog() {