8000 Enable IPv4 or IPv4/IPv6 stacks, Ethernet class (#695) · earlephilhower/arduino-pico@0e18f09 · GitHub
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Enable IPv4 or IPv4/IPv6 stacks, Ethernet class (#695)
IPv4-only mode saves 20KB+ of flash memory. Add some backwards compatibility with the global Arduino Ethernet class when running in IPv4 only mode. Fixes #687 * Speed P.IO build by not cloning 2GB of sources * Document P.IO new option
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13 files changed

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-26
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13 files changed

+662
-26
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‎.github/workflows/pull-request.yml

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@@ -185,7 +185,14 @@ jobs:
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steps:
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- uses: actions/checkout@v3
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with:
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submodules: 'recursive'
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submodules: 'true'
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- name: Initialize needed submodules
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run: |
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cd pico-sdk
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git submodule update --init
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cd ../libraries/Adafruit_TinyUSB_Arduino
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git submodule update --init
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cd ../..
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- name: Cache pip
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uses: actions/cache@v2
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with:

‎boards.txt

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‎cores/rp2040/api/IPAddress.cpp

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@@ -179,8 +179,10 @@ bool IPAddress::isValid(const char* arg) {
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return IPAddress().fromString(arg);
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}
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namespace arduino {
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const IPAddress INADDR_ANY; // generic "0.0.0.0" for IPv4 & IPv6
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const IPAddress INADDR_NONE(255,255,255,255);
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};
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void IPAddress::clear() {
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(*this) = INADDR_ANY;

‎cores/rp2040/api/IPAddress.h

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@@ -27,11 +27,14 @@
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#include <lwip/ip_addr.h>
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#include <lwip/ip4_addr.h>
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namespa 8000 ce arduino {
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#if !LWIP_IPV6
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struct ip_addr: ipv4_addr { };
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#endif // !LWIP_IPV6
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// forward declarations of global name space friend classes
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class EthernetClass;
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class DhcpClass;
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class DNSClient;
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namespace arduino {
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// to display a netif id with printf:
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#define NETIFID_STR "%c%c%u"
@@ -48,8 +51,19 @@ struct ip_addr: ipv4_addr { };
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class IPAddress: public Printable {
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private:
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#if !LWIP_IPV6
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// Ugly hack to allow Arduino Ethernet library to twiddle internal bits.
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// This can only work in IPv4-only mode, of course.
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union {
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ip_addr_t _ip;
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struct {
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uint8_t bytes[4];
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} _address;
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};
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static_assert(sizeof(_ip) == sizeof(_address), "IP_ADDR_T size != _ADDRESS size");
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#else
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ip_addr_t _ip;
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#endif
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// Access the raw byte array containing the address. Because this returns a pointer
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// to the internal structure rather than a copy of the address this function should only
@@ -149,6 +163,10 @@ class IPAddress: public Printable {
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friend class DhcpClass;
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friend class DNSClient;
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friend ::EthernetClass;
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friend ::DhcpClass;
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friend ::DNSClient;
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/*
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lwIP address compatibility
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*/
@@ -167,14 +185,14 @@ class IPAddress: public Printable {
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bool isLocal () const { return ip_addr_islinklocal(&_ip); }
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#if LWIP_IPV6
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IPAddress(const ip_addr_t& lwip_addr) { ip_addr_copy(_ip, lwip_addr); }
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IPAddress(const ip_addr_t* lwip_addr) { ip_addr_copy(_ip, *lwip_addr); }
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IPAddress& operator=(const ip_addr_t& lwip_addr) { ip_addr_copy(_ip, lwip_addr); return *this; }
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IPAddress& operator=(const ip_addr_t* lwip_addr) { ip_addr_copy(_ip, *lwip_addr); return *this; }
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#if LWIP_IPV6
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uint16_t* raw6()
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{
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setV6();

‎docs/platformio.rst

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@@ -222,6 +222,18 @@ default Pico SDK USB stack. To change it, add
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Note that the special "No USB" setting is also supported, through the
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shortcut-define ``PIO_FRAMEWORK_ARDUINO_NO_USB``.
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IP Stack
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---------
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The lwIP stack can be configured to support only IPv4 (default) or additionally IPv6. To activate IPv6 support, add
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.. code:: ini
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; IPv6
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build_flags = -DPIO_FRAMEWORK_ARDUINO_ENABLE_IPV6
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to the ``platformio.ini``.
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Selecting a different core version
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----------------------------------

‎lib/libpico-ipv6.a

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‎lib/libpico.a

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‎libraries/lwIP_Ethernet/src/LwipIntfDev.h

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@@ -179,7 +179,7 @@ int LwipIntfDev<RawDev>::hostByName(const char* aHostname, IPAddress& aResult, i
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#if LWIP_IPV4 && LWIP_IPV6
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err_t err = dns_gethostbyname_addrtype(aHostname, &addr, &_dns_found_callback, &cb, LWIP_DNS_ADDRTYPE_DEFAULT);
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#else
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err_t err = dns_gethostbyname(aHostname, &addr, &wifi_dns_found_callback, &cb);
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err_t err = dns_gethostbyname(aHostname, &addr, &_dns_found_callback, &cb);
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#endif
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if (err == ERR_OK) {
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aResult = IPAddress(&addr);

‎platform.txt

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@@ -41,12 +41,11 @@ compiler.warning_flags.default=-Werror=return-type
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compiler.warning_flags.more=-Wall -Werror=return-type -Wno-ignored-qualifiers
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compiler.warning_flags.all=-Wall -Wextra -Werror=return-type -Wno-ignored-qualifiers
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compiler.netdefines=-DPICO_CYW43_ARCH_THREADSAFE_BACKGROUND=1 -DCYW43_LWIP=0 -DLWIP_IPV6=1 -DLWIP_IPV4=1 -DLWIP_IGMP=1 -DLWIP_CHECKSUM_CTRL_PER_NETIF=1
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compiler.netdefines=-DPICO_CYW43_ARCH_THREADSAFE_BACKGROUND=1 -DCYW43_LWIP=0 {build.lwipdefs} -DLWIP_IGMP=1 -DLWIP_CHECKSUM_CTRL_PER_NETIF=1
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compiler.defines={build.led} {build.usbstack_flags} -DCFG_TUSB_MCU=OPT_MCU_RP2040 -DUSB_VID={build.vid} -DUSB_PID={build.pid} '-DUSB_MANUFACTURER={build.usb_manufacturer}' '-DUSB_PRODUCT={build.usb_product}' {compiler.netdefines}
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compiler.includes="-iprefix{runtime.platform.path}/" "@{runtime.platform.path}/lib/platform_inc.txt" "-I{runtime.platform.path}/include"
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compiler.flags=-march=armv6-m -mcpu=cortex-m0plus -mthumb -ffunction-sections -fdata-sections {build.flags.exceptions} {build.flags.stackprotect}
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compiler.wrap="@{runtime.platform.path}/lib/platform_wrap.txt"
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compiler.libpico="{runtime.platform.path}/lib/libpico.a"
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compiler.libbearssl="{runtime.platform.path}/lib/libbearssl.a"
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compiler.c.cmd=arm-none-eabi-gcc
@@ -92,8 +91,9 @@ build.usbstack_flags=
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build.flags.libstdcpp=-lstdc++
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build.flags.exceptions=-fno-exceptions
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build.flags.stackprotect=
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build.libpico=libpico.a
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build.boot2=boot2_generic_03h_4_padded_checksum
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build.lwipdefs=-DLWIP_IPV6=0 -DLWIP_IPV4=1
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# Allow Pico boards do be auto-discovered by the IDE
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discovery.rp2040.pattern="{runtime.tools.pqt-python3.path}/python3" -I "{runtime.platform.path}/tools/discovery.py"
@@ -123,7 +123,7 @@ recipe.hooks.linking.prelink.1.pattern="{runtime.tools.pqt-python3.path}/python3
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recipe.hooks.linking.prelink.2.pattern="{compiler.path}{compiler.S.cmd}" {compiler.c.elf.flags} {compiler.c.elf.extra_flags} -c "{runtime.platform.path}/boot2/{build.boot2}.S" "-I{runtime.platform.path}/pico-sdk/src/rp2040/hardware_regs/include/" "-I{runtime.platform.path}/pico-sdk/src/common/pico_binary_info/include" -o "{build.path}/boot2.o"
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## Combine gc-sections, archives, and objects
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recipe.c.combine.pattern="{compiler.path}{compiler.c.elf.cmd}" "-L{build.path}" {compiler.c.elf.flags} {compiler.c.elf.extra_flags} {compiler.ldflags} "-Wl,--script={build.path}/memmap_default.ld" "-Wl,-Map,{build.path}/{build.project_name}.map" -o "{build.path}/{build.project_name}.elf" -Wl,--start-group {object_files} "{build.path}/{archive_file}" "{build.path}/boot2.o" {compiler.libraries.ldflags} {compiler.libpico} {compiler.libbearssl} -lm -lc {build.flags.libstdcpp} -lc -Wl,--end-group
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recipe.c.combine.pattern="{compiler.path}{compiler.c.elf.cmd}" "-L{build.path}" {compiler.c.elf.flags} {compiler.c.elf.extra_flags} {compiler.ldflags} "-Wl,--script={build.path}/memmap_default.ld" "-Wl,-Map,{build.path}/{build.project_name}.map" -o "{build.path}/{build.project_name}.elf" -Wl,--start-group {object_files} "{build.path}/{archive_file}" "{build.path}/boot2.o" {compiler.libraries.ldflags} "{runtime.platform.path}/lib/{build.libpico}" {compiler.libbearssl} -lm -lc {build.flags.libstdcpp} -lc -Wl,--end-group
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## Create output (UF2 file)
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recipe.objcopy.uf2.pattern="{runtime.tools.pqt-elf2uf2.path}/elf2uf2" "{build.path}/{build.project_name}.elf" "{build.path}/{build.project_name}.uf2"

‎tools/libpico/CMakeLists.txt

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@@ -21,7 +21,7 @@ target_compile_definitions(pico PUBLIC
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PICO_FLASH_SIZE_BYTES=16777216
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PICO_XOSC_STARTUP_DELAY_MULTIPLIER=64
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LWIP_IPV4=1
24-
LWIP_IPV6=1
24+
LWIP_IPV6=${IPV6}
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LWIP_UDP=1
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LWIP_IGMP=1
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LWIP_CHECKSUM_CTRL_PER_NETIF=1

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