Release 0.19.0 · ssilverman/QNEthernet

Added

Added Ethernet.loop() calls to the EthernetClient::write() functions when the send buffer is full.
Added Ethernet hardware detection to support (well, "non-support") the Teensy 4.1 NE.

Updated lwipopts.h to examine LWIP_MDNS_RESPONDER when setting certain values.
Ethernet.loop() calls are now attached/detached to/from yield in Ethernet.begin(...)/end().
Improved pin configurations and comments.
Disabled LWIP_STATS option by default. Saves a little memory.
Updated Arduino Ethernet API links in keywords.txt.
Only add 1 to MEMP_NUM_SYS_TIMEOUT option for mDNS instead of 3.
Updated examples to use both address and link state on network changes. This accommodates when a static IP is used.
Changed UDP and TCP PCB creation to use an appropriate ip_addr_t type instead of the unspecified default.
Changed CRC-32 function for multicast lookup to not use a lookup table. This saves 1KiB of flash but makes the calculation about 4.7x slower but still in the microsecond range (~0.090µs -> ~0.42µs).
Moved EthernetClass, EthernetFrameClass, and MDNSClass constructors and destructors to FLASHMEM (where possible). This saves a little RAM1 space.
Moved lwIP's memory pools into 4-byte aligned DMAMEM (RAM2). This saves a lot of RAM1 space, about 27KiB with the current configuration.
Changed the promiscuous mode macro name from QNETHERNET_PROMISCUOUS_MODE to QNETHERNET_ENABLE_PROMISCUOUS_MODE.
Changed all the DHCP timeouts in the examples to 15 seconds.
Changed EthernetUDP::send() functions to return an lwIP error code instead of a 1-or-0 Boolean value. Zero (ERR_OK) means no error. This makes it easier to diagnose any problems.

Reverted how interrupts were being cleared to use assignment instead of OR'ing the bits. This seemed to fix an apparent freeze. (See this issue: #26)
Fixed a signedness comparison warning in OSCPrinter example.
Addressed "extra" (-Wextra) and pedantic (-Wpedantic) warnings.