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Improve bootloader flash implementation with proper erase and write operations

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Co-authored-by: netmindz <442066+netmindz@users.noreply.github.com>
This commit is contained in:
copilot-swe-agent[bot]
2025-10-05 14:24:29 +00:00
parent a18a661c73
commit c3e18905c1
1 changed files with 46 additions and 19 deletions
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65
wled00/wled_server.cpp
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@@ -561,6 +561,11 @@ void initServer()
}
if (!correctPIN || otaLock) return;
static size_t bootloaderBytesWritten = 0;
static bool bootloaderErased = false;
const uint32_t bootloaderOffset = 0x1000;
const uint32_t maxBootloaderSize = 0x8000; // 32KB max
if (!index) {
DEBUG_PRINTLN(F("Bootloader Update Start"));
#if WLED_WATCHDOG_TIMEOUT > 0
@@ -569,36 +574,58 @@ void initServer()
lastEditTime = millis(); // make sure PIN does not lock during update
strip.suspend();
strip.resetSegments();
bootloaderBytesWritten = 0;
bootloaderErased = false;
// Begin bootloader update - use U_FLASH and specify bootloader partition offset
if (!Update.begin(0x8000, U_FLASH, -1, 0x1000)) {
DEBUG_PRINTLN(F("Bootloader Update Begin Failed"));
Update.printError(Serial);
// Verify bootloader magic on first chunk
if (!isValidBootloader(data, len)) {
DEBUG_PRINTLN(F("Invalid bootloader file!"));
strip.resume();
#if WLED_WATCHDOG_TIMEOUT > 0
WLED::instance().enableWatchdog();
#endif
Update.abort();
return;
}
// Erase bootloader region (32KB)
DEBUG_PRINTLN(F("Erasing bootloader region..."));
esp_err_t err = esp_flash_erase_region(NULL, bootloaderOffset, maxBootloaderSize);
if (err != ESP_OK) {
DEBUG_PRINTF_P(PSTR("Bootloader erase error: %d\n"), err);
strip.resume();
#if WLED_WATCHDOG_TIMEOUT > 0
WLED::instance().enableWatchdog();
#endif
Update.abort();
return;
}
bootloaderErased = true;
}
// Verify bootloader magic on first chunk
if (index == 0 && !isValidBootloader(data, len)) {
DEBUG_PRINTLN(F("Invalid bootloader file!"));
// Write data to flash at bootloader offset
if (bootloaderErased && bootloaderBytesWritten + len <= maxBootloaderSize) {
esp_err_t err = esp_flash_write(NULL, data, bootloaderOffset + bootloaderBytesWritten, len);
if (err != ESP_OK) {
DEBUG_PRINTF_P(PSTR("Bootloader flash write error: %d\n"), err);
Update.abort();
} else {
bootloaderBytesWritten += len;
}
} else if (!bootloaderErased) {
DEBUG_PRINTLN(F("Bootloader region not erased!"));
Update.abort();
} else {
DEBUG_PRINTLN(F("Bootloader size exceeds maximum!"));
Update.abort();
strip.resume();
#if WLED_WATCHDOG_TIMEOUT > 0
WLED::instance().enableWatchdog();
#endif
return;
}
if (!Update.hasError()) {
Update.write(data, len);
}
if (isFinal) {
if (Update.end(true)) {
DEBUG_PRINTLN(F("Bootloader Update Success"));
if (!Update.hasError() && bootloaderBytesWritten > 0) {
DEBUG_PRINTF_P(PSTR("Bootloader Update Success - %d bytes written\n"), bootloaderBytesWritten);
bootloaderSHA256Cached = false; // Invalidate cached bootloader hash
} else {
DEBUG_PRINTLN(F("Bootloader Update Failed"));
Update.printError(Serial);
strip.resume();
#if WLED_WATCHDOG_TIMEOUT > 0
WLED::instance().enableWatchdog();