efuse: Add ESP32 V3 'disable Download Mode' functionality

2020-04-25 16:36:53 +10:00
parent 363589e849
commit 5a4091a2c0
9 changed files with 125 additions and 31 deletions
--- a/components/bootloader_support/include/esp_flash_encrypt.h
+++ b/components/bootloader_support/include/esp_flash_encrypt.h
@@ -121,6 +121,10 @@ esp_err_t esp_flash_encrypt_region(uint32_t src_addr, size_t data_length);
 * is enabled but secure boot is not used. This should protect against
 * serial re-flashing of an unauthorised code in absence of secure boot.
 *
+ * @note On ESP32 V3 only, write protecting FLASH_CRYPT_CNT will also prevent
+ * disabling UART Download Mode. If both are wanted, call
+ * esp_efuse_disable_rom_download_mode() before calling this function.
+ *
 */
 void esp_flash_write_protect_crypt_cnt();