ESP32-P4_DANTE/sdkconfig.defaults

CONFIG_IDF_TARGET="esp32p4"

# L2 TAP for PTP
CONFIG_ESP_NETIF_L2_TAP=y

# PTP daemon
CONFIG_NETUTILS_PTPD=y
CONFIG_NETUTILS_PTPD_CLIENT=y
CONFIG_NETUTILS_PTPD_SERVER=y
CONFIG_NETUTILS_PTPD_SYNC_INTERVAL_MSEC=125
CONFIG_NETUTILS_PTPD_ANNOUNCE_INTERVAL_MSEC=2000
CONFIG_NETUTILS_PTPD_PRIORITY1=128
CONFIG_NETUTILS_PTPD_PRIORITY2=128
CONFIG_NETUTILS_PTPD_CLASS=248
CONFIG_NETUTILS_PTPD_ACCURACY=254
CONFIG_NETUTILS_PTPD_CLOCKSOURCE=160
CONFIG_NETUTILS_PTPD_TWOSTEP_SYNC=y
CONFIG_NETUTILS_PTPD_SEND_DELAYREQ=y
CONFIG_NETUTILS_PTPD_DELAYREQ_AVGCOUNT=8
CONFIG_NETUTILS_PTPD_SERVERPRIO=20
CONFIG_NETUTILS_PTPD_STACKSIZE=6144
CONFIG_NETUTILS_PTPD_MAX_PATH_DELAY_NS=1000000
CONFIG_NETUTILS_PTPD_PATH_DELAY_STABILITY_NS=5000

# PSRAM
CONFIG_SPIRAM=y
CONFIG_SPIRAM_SPEED_80M=y

# lwIP - tuned for low-latency AES67 audio
CONFIG_LWIP_SO_RCVBUF=y
CONFIG_LWIP_NETBUF_RECVINFO=y
CONFIG_LWIP_IP_DEFAULT_TTL=64

# lwIP task: pin to core 0 (same as I2S/Ethernet for cache coherency)
CONFIG_LWIP_TCPIP_TASK_PRIO=23
CONFIG_LWIP_TCPIP_TASK_STACK_SIZE=4096
CONFIG_LWIP_TCPIP_TASK_AFFINITY_CPU0=y

# Larger mailboxes reduce queuing delay
CONFIG_LWIP_TCPIP_RECVMBOX_SIZE=128
CONFIG_LWIP_UDP_RECVMBOX_SIZE=128

# IRAM optimizations -- critical for reducing per-packet overhead
CONFIG_LWIP_IRAM_OPTIMIZATION=y
CONFIG_LWIP_EXTRA_IRAM_OPTIMIZATION=y

# Disable features we don't need (reduces per-packet processing)
CONFIG_LWIP_IP4_REASSEMBLY=n
CONFIG_LWIP_STATS=n
CONFIG_LWIP_ETHARP_TRUST_IP_MAC=y

# DHCP: fast acquisition, restore last IP to skip discovery
CONFIG_LWIP_DHCP_RESTORE_LAST_IP=y
CONFIG_LWIP_DHCP_OPTIONS_LEN=68
CONFIG_LWIP_DHCP_COARSE_TIMER_SECS=1

# Ethernet DMA: 64 RX buffers for headroom
CONFIG_ETH_ENABLED=y
CONFIG_ETH_USE_ESP32_EMAC=y
CONFIG_ETH_DMA_RX_BUFFER_NUM=64
CONFIG_ETH_DMA_TX_BUFFER_NUM=16
CONFIG_ETH_IRAM_OPTIMIZATION=y

# mDNS
CONFIG_MDNS_MAX_SERVICES=8

# FreeRTOS
CONFIG_FREERTOS_HZ=1000
CONFIG_FREERTOS_TIMER_TASK_STACK_DEPTH=4096
CONFIG_FREERTOS_USE_TRACE_FACILITY=y

# System
CONFIG_ESP_SYSTEM_EVENT_TASK_STACK_SIZE=4096
CONFIG_ESP_MAIN_TASK_STACK_SIZE=8192
CONFIG_ESP_TASK_WDT_TIMEOUT_S=10

# Performance optimization (-O2, critical for real-time audio paths)
CONFIG_COMPILER_OPTIMIZATION_PERF=y

# I2S ISR runs from IRAM (safe even when flash cache is disabled)
CONFIG_I2S_ISR_IRAM_SAFE=y

# Disable power management (real-time audio needs consistent performance)
CONFIG_PM_ENABLE=n

# Disable WiFi (Ethernet only, saves resources and avoids interference)
CONFIG_ESP_WIFI_ENABLED=n

# Disable IPv6 (saves ~39KB flash, 2KB RAM, reduces packet processing)
CONFIG_LWIP_IPV6=n

# HTTP server with WebSocket support
CONFIG_HTTPD_WS_SUPPORT=y
CONFIG_LWIP_MAX_SOCKETS=16

# Flash (Waveshare ESP32-P4-ETH: 32MB NOR flash)
CONFIG_ESPTOOLPY_FLASHSIZE_32MB=y
CONFIG_SPI_FLASH_SUPPORT_GD_CHIP=y
CONFIG_PARTITION_TABLE_SINGLE_APP_LARGE=y