65 lines
1.7 KiB
C
65 lines
1.7 KiB
C
#ifndef LWIPOPTS_H
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#define LWIPOPTS_H
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#include <stdint.h>
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// Minimal lwIP configuration for Pico W (CYW43) with DHCP.
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// This is intentionally small: we only need basic IPv4 + DHCP to get an address.
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// No RTOS
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#define NO_SYS 1
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// Memory options
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#define MEM_LIBC_MALLOC 0
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#define MEM_ALIGNMENT 4
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#define MEM_SIZE (16 * 1024)
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// Pbuf options
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#define PBUF_POOL_SIZE 24
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#define PBUF_POOL_BUFSIZE 1700
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// Link layer
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#define LWIP_ARP 1
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#define LWIP_ETHERNET 1
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// IP options
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#define LWIP_IPV4 1
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#define LWIP_IPV6 0
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#define IP_REASSEMBLY 0
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#define IP_FRAG 0
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// DHCP (client)
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#define LWIP_DHCP 1
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// Increase timeout slots (DHCP + DNS + TCP + MQTT can consume several; retries can amplify this).
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#define MEMP_NUM_SYS_TIMEOUT 24
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// Optional helpers (kept off unless needed)
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#define LWIP_DNS 1
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#define LWIP_UDP 1
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#define LWIP_TCP 1
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// MQTT needs an output ring buffer large enough for topic+payload.
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// Default (256) is too small for our JSON payload and results in ERR_MEM (-1).
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#define MQTT_OUTPUT_RINGBUF_SIZE 1024
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// Sockets / netconn APIs not used
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#define LWIP_SOCKET 0
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#define LWIP_NETCONN 0
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// Checksums
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#define CHECKSUM_GEN_IP 1
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#define CHECKSUM_GEN_UDP 1
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#define CHECKSUM_GEN_TCP 1
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#define CHECKSUM_CHECK_IP 1
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#define CHECKSUM_CHECK_UDP 1
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#define CHECKSUM_CHECK_TCP 1
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// Stats disabled
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#define LWIP_STATS 0
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// Debug disabled
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#define LWIP_DEBUG 0
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#endif // LWIPOPTS_H
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