Release 3.3.2 - WiFi hang fix, Serial updates, New boards

Important bug fix for WiFi under high load and a workaround for USB serial applications that don't set DTR properly.

WiFi

• Fix race condition between WiFi receive and consume (#1614)

Serial

• Add SerialUSB::ignoreFlowControl() method (#1624)

New boards

• Add new board Silicognition RP2040-Shim (#1623)
• Add Adafruit Metro RP2040 (#1630)

Quality of life fixes

• Update platform.txt to require auto-discovery and serial-monitor (#1631)
• Fix PlatformIO intellisense (#1616)

Release 3.3.1 - General bug fixes, I2S updates

Minor bug fixes in lots of parts of the core and libraries, additional boards.

New boards

• Add Challenger WiFi6/BLE5 board to the mix. (#1595)
• Add Pimoroni Plasma RP2040 support (#1556)
• Add ArtronShop RP2 Nano board (#1567)

Wire/I2C

• Handle swapped Wire IRQs properly (#1608)

OTA

• Fix FS upload crash (#1598)
• Remove obsolete refs to ATOMIC_FS_UPDATE (#1597)

I2S/Audio

• Add MCLK support for I2S, optimize clocks for jitter-free playback (#1555)
• Fix: 'I2S::operator=(const I2S&)' is implicitly (#1588)
• I2S: Don't consider _isHolding when it's an output (#1548)

SD/SDFS/SdFat

• Ensure 64bit math for SD card FSInfo (#1553)

Debugging

• BREAKING: Change default debug_script to cmsis-dap (#1565)

Release 3.3.0 - Pico SDK 1.5.1, I2S, and WebServer updates

Update to the latest Pico SDK, version 1.5.1, with a smaller TinyUSB installation and some Bluetooth bugfixes. Several minor I2S and audio related fixes when I2S is started and stopped multiple times.

Upgrades

• Update to Pico-SDK 1.5.1 (#1539)

I2S / Audio

• Addition ABM checks in PWMAudio and ADCInput (#1530)
• I2S check for failure of ARB and PIO allocation (#1528)
• Call I2S::end() in I2S destructor (#1527)
• Fix for invalid __channelCount in ~AudioBufferManager() (#1519)
• Enable proper reuse of PIO programs (#1526)

Other fixes and updates

• Linker tweaks for RAM-resident PicoDVI library functions (#1541)
• WebServer: Solve HTTP request delay by dropping idle connections (#1537)
• Add rebootToBootloader to reboot to bootloader from code (#1514)

Release 3.2.2 - More important FreeRTOS and I2S fixes

Some important FreeRTOS bug fixes and quality of life improvements, plus a major I2S correction eliminating clicking audio.

FreeRTOS

• CoreMutex add portYieldFromISR for FreeRTOS (#1484)
• Fix CoreMutex FreeRTOS ISR logic (#1510)
• Fix serial reset hang under FreeRTOS (#1495)

I2S

• AudioBufferManager(I2s, PWMAudio, ADCInput) clicking fix (#1500)
• AudioBufferManager: Make dma_claim_unused_channel() not panic (#1487)
• I2S::available/availableForWrite() returns bytes (#1499) (#1496)
• Add I2S::getOverUnderflow() (#1497)

Other fixes and update

• Update to Adafruit TinyUSB 2.2.1 (#1511)
• Added BT setup overload to pass name. (#1483)
• Implement the BD_ADDR(char * address_string) constructor. (#1440)

Release 3.2.1 - FreeRTOS and I2S bug fixes, misc updates

Several important FreeRTOS bug fixes and update to latest upstream, minor I2S fix, and Adafruit Feather breaking change

Breaking changes

• BREAKING: Swap Wire1 and Wire in Adafruit Feather (#1461)

FreeRTOS bug fixes and updates

• Merge latest FreeRTOS/SMP upstream branch (#1449)
• Clean up FreeRTOS, remove core freeze hacks (#1448)
• Use real FreeRTOS tasks to idle core during flash (#1444)
• Fix FreeRTOS CoreMutex shim to handle ISRs (#1442)

Minor bug fixes and updates

• Fix I2S::write(const uint8_t *buffer, size_t size) (#1461)
• BT Serial connection docs for Mac (#1459)
• Add setInverted() options to SerialPIO (#1451)
• Add dummy Serial implementation when NO_USB defined (#1438)
• Generate warnings if Pico STDIO init called (#1467)

Release 3.2.0 - Boards, Platform.IO updates, minor bug fixes

Lots of minor bug fixes and updates to core and Platform.io

Bug fixes

• Rename BTstack lib to BTstackLib (#1360)
• Clear compile errors if BT needed but not on (#1371)
• Fix USB Mouse/Joystick HID report ID (#1418)
• Protect the HW random generation from FreeRTOS (#1395)
• Fix USB crashes in FreeRTOS (#1419)
• Don't delete first cert, taken from ESP8266 repo (#1392)
• FreeRTOS compilation fix when no LED present (#1413)
• Add PICO_FLASH_SIZE_BYTES define (#1414) (#1416)
• Update to Adafruit_TinyUSB 2.1.0 (#1387)

Platform.IO updates

• Support and Document pico-debug in PlatformIO (#1427)
• Sync macros used in PlatformIO and platform.txt (#1386)
• Enable BlackMagicProbe for PlatformIO (#1378)
• Remove circular dependency on WiFi/LWIP_Ethernet (#1415)

New Boards

• Add Feathers: CAN and Prop-Maker (#1421)
• Add board Seeed Indicator RP2040 (#1375)

Release 3.1.1 - New boards, Mouse and Keyboard updates

Minor update to support additional boards and USB/Bluetooth keyboard and mouse modes.

Bug Fixes

• Increase UDP PCBs to avoid DNS OOM error (#1304)
• Clean up CoreMutex and __isFreeRTOS definition (#1312)

Updated Libraries

• Add absolute mouse support (#1342)
• Add HID consumer (aka media) keys for USB, BT (#1309)
• Add (unsupported) BTstack Arduino library (#1305)
• Add I2S::swapClocks() for boards w/reversed pins (#1298)

New Boards

• Add support for Challenger UWB board, fix some defines (#1351)
• Add Feather ThinkINK and USB Host (#1334)
• Add Feather RP2040 RFM, fix pins in SCORPIO, DVI board defs (#1333)
• Feather DVI peripheral fix (#1301)
• Add 4 and 8 MB VCC_GND boards via Flash Size menu (#1297)

Release 3.1.0 - WiFi/MDNS stability fixes, Bluetooth on Platform.IO

3.1.0 - Network stability fixes, Bluetooth on Platform.IO

Major Updates

• Manually add MDNS multicast Ethernet MACs to CYW43 (#1290)
• Adjust LWIP intf to avoid hangs/crashes under load (#1286)
• Add Bluetooth to the PIO CI (#1269)

Minor updates/bug fixes

• Add instructions for making I2S input work with Adafruit microphone (#1272)
• Add Bluetooth support to Platform.io (#1259)
• Add Keyboard LED callback for USB and BT (not BLE) (#1265)
• Allow setting names for BT/BLE HID devices (#1260)
• Use generic HID classes to minimize code duplic'n (#1254)
• Add setBattery to BLE HID devices (#1246)

New boards

• Add Adafruit Feather RP2040 DVI (#1245)
• Add board definition for Neko Systems BL2040 Mini (#1258)
• Fix pin assignment for Waveshare RP2040 1.28 LCD PIN_BAT_ADC (#1292)
• Reassign I2C pins to correct buses (#1255)

---

3.0.0 - Large update, focused on Bluetooth support for the Pico W

Major Updates

• Bluetooth Classic and Bluetooth Low Energy (BLE) alpha support (#1167)
• Update to SDK 1.5 (#1167)
• Use Pico-SDK CYW43 infrastructure (#1167)
• Add Bluetooth Classic HID libraries and examples (#1240)
• Add Bluetooth SPP SerialBT and examples (#1240)
• Add BLE HID libraries and examples (#1240)
• Move pico-sdk to RPI's original version (#1239)
• More aggressive WiFiMulti, targets specific APs by BSSID (#1167)

Bugfixes

• Move PicoW auto-reassignment of LED pin to code (#1208)
• Always apply 5M speed to CMSIS_DAP TCL script (#1218)
• Return custom USB product and manufacturer (#1223)

Release 3.0.0 - Bluetooth/BLE, SDK 1.5.0

Large update, focused on Bluetooth support for the Pico W

Major Updates

• Bluetooth Classic and Bluetooth Low Energy (BLE) alpha support (#1167)
• Update to SDK 1.5 (#1167)
• Use Pico-SDK CYW43 infrastructure (#1167)
• Add Bluetooth Classic HID libraries and examples (#1240)
• Add Bluetooth SPP SerialBT and examples (#1240)
• Add BLE HID libraries and examples (#1240)
• Move pico-sdk to RPI's original version (#1239)
• More aggressive WiFiMulti, targets specific APs by BSSID (#1167)

Bugfixes

• Move PicoW auto-reassignment of LED pin to code (#1208)
• Always apply 5M speed to CMSIS_DAP TCL script (#1218)
• Return custom USB product and manufacturer (#1223)

Release 2.7.3 - PicoProbe updates, bugfixes , new toolchain

2.7.3

New features

• Upgrade to toolchain 1.5.0-b (#1196) (#1195) -- Fixes ::printf() debug output, for FreeRTOS and normal mode
• Add picoprobe CMSIS-DAP support (#1198) -- Raspberry Pi team is moving to CMSIS-DAP via the PicoProbe UF2
• Add isPicoW call to RP2040 object (#1204) -- Runtime detection of the board (best guess)
• Enable use of uninitialized_ram() macro (#1199) (#1200)
• Add rp2040.cpuid() call to get running core (#1190)
• Implement WiFi::softAPgetStationNum (#1174)
• Make uf2conf.py flush STDOUT for real-time updates (#1194)

Bug fixes

• Fix FreeRTOS hanging (#1193)
• Allow FreeRTOS to ::printf (#1195)
• Remove extra SPI byte flip (#1202)
• Fix SD.H FILE_WRITE mapping (#1178)
• Update SD examples with working SPI configs (#1175)

2.7.2

New boards

• Add the YD-RP2040 support files
• Add boot2_w25q128jv to generic Pico flash menu (#1142)
• Add uPesy Tutorials using Arduino Pico port. (#1151)
• Add correct boot source to helios (#1126)

Audio/I2S/ADC/PDM

• Avoid race condition in I2S/PWMAudio delete (#1163)
• PDM library re-port (#1160)

Serial UART

• Avoid initial glitch on Serial1/2 when RX high (#1154)
• Fix SerialUART::overflow reporting race condition (#1133)
• Add Serial UART break reporting (#1108)

ESP8266/ESP32 compatibility

• Add ESP8266/32 WiFi.isConnected wrapper (#1166)
• Apply SD.h fix from ESP8266 (#1171)

I2C/SPI/USB

• Fix SPI transfer16 return value (#1148)
• Fix USB VID/PID setting, rationalize boards.txt (#1144)

Upload

• Optimize and improve upload experience (#1136)
• Print useful uf2conv error if executable not found (#1141)

2.7.1

New boards

• Add VCC-GND YD-RP2040 board (#1120)
• Add 0xCB Helios (#1117)

Audio/I2S/ADC

• Add stereo support, docs for PWM playback (#1084)
• DMA-based ADC input (microphone, analog sensor) (#1101)
• Stop the I2S PIO when I2S::end called (#1103)
• Allow on-the-fly changes to PWMAudio when possible (#1098)
• Add LSBJ format support for I2S (#1095)

WebServer

• Add hook support to WebServer (#1119)

Compatibility

• Adding sei() and cli() as aliases for interrupts() and noInterrupts(). (#1089)
• Add WString.h include redirect for broader compat (#1083)
• Warn when Serial.printf() format is wrong (#1090)
• Move analogReadTemp() to C++-only (#1097)

General

• Redo boards menu, separate out upload method, add picotool upload (#1112)
• Add additional instructions for Linux Flatpak users (#1105)
• Handle slave mode I2C restarts (#1104)
• Update to LittleFS 2.5.1 (only minor updates) (#1099)
• Reduce stack usage of several components (#1093)
• Remove debug printout warnings (#1091)

2.7.0

• Add PWMAudio for DAC-free audio playback (#1076)
• digitalRead/WriteFast to sio_hw->gpio (#1077)
• Universal analogReadTemp() (#1075)
• Fix I2S::flush volatile casting (#1074)
• Reduce ADC memory footprint slightly (#1073)
• Make the AudioRingBuffer list-based (#1064)
• Speed up ADC reads by not re-initting (#1072)
• Add digitalWrite/ReadFast macros (#1069)
• Update to Adafruyit TinyUSB 1.17 (#1071)
• Degz Mizu changed to Viyalab Mizu RP2040 (#1062)
• Update to 1.5.0-a toolchain (#1060)
• Add nullbits Bit-C PRO board (#1051)
• Fix CI errors when more than one *.a in cache dir (#1049)