add firmware source code (#4)

* add firmware source code

firmware/sdkconfig.defaults

@@ -0,0 +1,79 @@
+# This file was generated using idf.py save-defconfig. It can be edited manually.
+# Espressif IoT Development Framework (ESP-IDF) 5.5.1 Project Minimal Configuration
+#
+CONFIG_IDF_TARGET="esp32s3"
+CONFIG_BOOTLOADER_APP_ROLLBACK_ENABLE=y
+CONFIG_BOOTLOADER_COMPILER_OPTIMIZATION_PERF=y
+CONFIG_BOOTLOADER_LOG_LEVEL_NONE=y
+CONFIG_BOOTLOADER_SKIP_VALIDATE_ALWAYS=y
+CONFIG_ESPTOOLPY_FLASHMODE_QIO=y
+CONFIG_ESPTOOLPY_FLASHSIZE_16MB=y
+CONFIG_PARTITION_TABLE_CUSTOM=y
+CONFIG_PARTITION_TABLE_CUSTOM_FILENAME="xiaozhi-esp32/partitions/v2/16m.csv"
+CONFIG_LANGUAGE_EN_US=y
+CONFIG_BOARD_TYPE_M5STACK_STACK_CHAN=y
+CONFIG_SR_WN_WN9_HISTACKCHAN_TTS3=y
+CONFIG_COMPILER_OPTIMIZATION_SIZE=y
+CONFIG_COMPILER_CXX_EXCEPTIONS=y
+CONFIG_COMPILER_CXX_EXCEPTIONS_EMG_POOL_SIZE=1024
+CONFIG_COMPILER_CXX_RTTI=y
+CONFIG_BT_ENABLED=y
+CONFIG_BT_NIMBLE_ENABLED=y
+CONFIG_BT_NIMBLE_HS_FLOW_CTRL=y
+CONFIG_BT_NIMBLE_ENABLE_CONN_REATTEMPT=n
+CONFIG_UART_ISR_IN_IRAM=y
+CONFIG_HTTPD_MAX_REQ_HDR_LEN=2048
+CONFIG_HTTPD_MAX_URI_LEN=2048
+CONFIG_SPIRAM=y
+CONFIG_SPIRAM_SPEED_80M=y
+CONFIG_SPIRAM_MEMTEST=n
+CONFIG_SPIRAM_MALLOC_ALWAYSINTERNAL=512
+CONFIG_SPIRAM_MALLOC_RESERVE_INTERNAL=65536
+CONFIG_ESP_DEFAULT_CPU_FREQ_MHZ_240=y
+CONFIG_ESP32S3_INSTRUCTION_CACHE_32KB=y
+CONFIG_ESP32S3_DATA_CACHE_LINE_64B=y
+CONFIG_ESP_SYSTEM_EVENT_TASK_STACK_SIZE=4096
+CONFIG_ESP_MAIN_TASK_STACK_SIZE=8192
+CONFIG_ESP_TASK_WDT_TIMEOUT_S=10
+CONFIG_ESP_WIFI_STATIC_RX_BUFFER_NUM=3
+CONFIG_ESP_WIFI_DYNAMIC_RX_BUFFER_NUM=6
+CONFIG_ESP_WIFI_DYNAMIC_RX_MGMT_BUFFER=y
+CONFIG_ESP_WIFI_RX_BA_WIN=3
+CONFIG_ESP_WIFI_IRAM_OPT=n
+CONFIG_ESP_WIFI_RX_IRAM_OPT=n
+CONFIG_ESP_WIFI_ENTERPRISE_SUPPORT=n
+CONFIG_FREERTOS_GENERATE_RUN_TIME_STATS=y
+CONFIG_LWIP_TCPIP_RECVMBOX_SIZE=16
+CONFIG_MBEDTLS_EXTERNAL_MEM_ALLOC=y
+CONFIG_MBEDTLS_DYNAMIC_BUFFER=y
+CONFIG_MBEDTLS_DYNAMIC_FREE_CONFIG_DATA=y
+CONFIG_MBEDTLS_SSL_KEEP_PEER_CERTIFICATE=n
+CONFIG_MBEDTLS_SSL_RENEGOTIATION=n
+CONFIG_LIBC_NEWLIB_NANO_FORMAT=y
+CONFIG_CAMERA_GC0308=y
+CONFIG_CAMERA_GC0308_DVP_YUV422_320X240_20FPS=y
+CONFIG_LV_USE_CLIB_MALLOC=y
+CONFIG_LV_USE_CLIB_STRING=y
+CONFIG_LV_USE_CLIB_SPRINTF=y
+CONFIG_LV_USE_ASSERT_STYLE=y
+CONFIG_LV_FONT_MONTSERRAT_16=y
+CONFIG_LV_FONT_MONTSERRAT_24=y
+CONFIG_LV_FONT_FMT_TXT_LARGE=y
+CONFIG_LV_USE_FONT_PLACEHOLDER=n
+CONFIG_LV_USE_ANIMIMG=n
+CONFIG_LV_USE_KEYBOARD=n
+CONFIG_LV_USE_LED=n
+CONFIG_LV_USE_LIST=n
+CONFIG_LV_USE_MENU=n
+CONFIG_LV_USE_MSGBOX=n
+CONFIG_LV_USE_SPAN=n
+CONFIG_LV_USE_SPINBOX=n
+CONFIG_LV_USE_TABVIEW=n
+CONFIG_LV_USE_TILEVIEW=n
+CONFIG_LV_USE_WIN=n
+CONFIG_LV_USE_LODEPNG=y
+CONFIG_LV_USE_QRCODE=y
+CONFIG_LV_USE_SNAPSHOT=y
+CONFIG_LV_USE_IMGFONT=y
+CONFIG_LV_BUILD_EXAMPLES=n
+CONFIG_LV_BUILD_DEMOS=n