Spresense SDK Release Notes

Feature enhancements are available.

This release has a new bootloader which have to be loaded before use.

[HostIF] Support new feature to communicate via I2C/SPI slave with external host device.

[DigitalFilter] Add digital filter library. Within this library, the following two filters have been added.

[Audio] Fix an issue where a warning would occur on WAV playback with 96 kHz(sampling-rate) and 24 bits(sample-bit-length).

[Image] Add support for error handling using setjmp/longjmp in the libjpeg sample (jpeg_decorder).

[FileSystem] Enhance recoverability from power failure during adding file for SmartFS file system on SPI-Flash.

[LTE] Improve network connection stability with LTE

[Power] Add an example code (power_sleep) of waking up from power-saving sleep mode (Deep/Cold) by RTC alarm.

[DigitalFilter] Add an example code (fir_filter) of envelope processing using the H function, which is used to analyze impulse signals associated with machine degradation.

Feature enhancements are available.

This release has a new bootloader which have to be loaded before use.

[AI] Google’s TensorFlow Lite for Microcontrollers is now available, and the micro_speech / person_detection samples can be run.

[OS] Enabled the FAT file system timestamp feature in the default configuration.

[Ether] Support usersocket for WIZnet’s W5500.

[MPCOMM] Added a framework for creating programs that run cooperatively on multiple subcores in ASMP.

[Video] Added support for Scene select on V4L2.

[Camera] The maximum exposure time of the camera has been extended from 1 second to 2.1 seconds, the maximum value of ISX012.

[LTE] Fixed an issue where TLS connections to domains registered for both IPv4 and IPv6 were not possible when the IP type was set to IPv6 Only in the access point settings.

[LTE] Fixed an issue that caused Assert to occur in rare cases during data communication in LTE.

[LTE] Fixed an issue where the recvfrom()/sendto() API sometime would not return rarely when the LTE Daemon debug logging was enabled.

[libjpeg] Fixed CVE-2020-14153.

[LTE/GNSS] Added a sample for uploading GNSS positioning results to AWS IoT Core.

Feature enhancements are available.

This release has a new bootloader which have to be loaded before use.

[LTE] Fixed a rare error when using the ifup command to activate LTE.

[LTE] Fixed an issue in the NuttShell where an assert would occur if you stopped the LTE Daemon using the "lte_daemon stop" command and then ran the "lte_daemon start" command again within one second.

[ASMP] Fixed an issue where an error was not returned when calling the SPK startup API in case of the execution memory was exhausted.

[GNSS] Fixed a typo in the GNSS sample Kconfig（Thanks to @slipperyseal）

[SCU] The API (seq_open()) of the SCU driver has been improved to return an error code when an invalid value is specified.

[UART] The HW Flow control and O_NONBLOCK options are supported by the UART0 driver.

[Graphics] API (imageproc_clip_and_resize()) for clipping and resizing YUV images supports the ability to just clip them.

[Other] The CXD5247’s GPO can now be controlled to set and acquire HiZ status.

Feature improvement are available

[Build] The memory size of the main core application can be changed by linker in the SDK exported environment.

Update the kernel to NuttX 8.2

This release has a new bootloader which have to be loaded before use.

[NuttX] Update a kernel to NuttX version 8.2. It is available to use a new device drivers and new features.

[NuttX] Available for NuttX original applications. It can be used a various sample applications and utility libraries for Spresense.

[Examples] By making NuttX apps available, the sample code directory has been split into the following two locations.

[Build system] Integrated the build system that was separated by Kernel and SDK into one

[UART] Enabled to change the setting of serial terminal by Termios API

[GNSS] Add support for positioning using Galileo/BeiDou satellite

[GNSS] Supports accurate 1-second cycle signals(1PPS signals) output based on satellite time information

[LTE] Add LTE daemon for NuttX network stack

[Graphics] Supports alpha blending of 2D graphics by using CXD5602 hardware accelerator.

[Camera] Refactored camera example.

[MultiWebCamera] Using the Spresense Camera and Wi-Fi. A simple WebCamera app sample has been added.

Feature enhancements are available.

This release has a new bootloader which have to be loaded before use.

[PWM] Support for PWM frequency of 1Hz at a minimum.

[GNSS] Fix a problem that the velocity of PVT log is incorrect.

[Sleep] Fix an issue where it would not wake up when entering Deep Sleep after more than 36 hours of power on.

[Audio] Add an example (audio_sound_effector) of sound effector with low latency.

LTE function is available from this version. This function is limited in Japan.

Feature enhancements are available.

This release has a new bootloader which have to be loaded before use.

[LTE] Officially supported LTE extension board "CXD5602PWBLM1J"

[Camera] Add JPEG as a pixel format for video stream

[SD Card] Fixed the problem that the SD card was not mounted when insert and remove the SD card quickly.

Feature improvement is available

[Audio] Reduced the boot time of DSP Codec binary in SPI-Flash.

[Build] Support for using a user name with multi-byte code in a Windows environment.

Feature improvement is available.

Fix minor bugs.

Feature improvement is available

This release has a new bootloader which have to be loaded before use.

[Audio] Add a framework for implementing Voice recognition with another CPU core.

[System] Improved transfer speed in Zmodem.

Feature improvement is available.

[GNSS] Improve GNSS sensitivity when SD card is inserted(without accessed).

*In addition to Ubuntu, Windows and macOS are officially supported as development environment. *
For details, refer to the Spresense SDK Getting Started Guide (CLI).

New features and feature enhancements are available.

This release has a new bootloader which have to be loaded before use.

[Audio] Add a framework for implementing signal processing of microphone input with another CPU core.

[Math] Supported the Math library(Newlib).

[GNSS] Fixed the problem that GNSS positioning can not start immediately after system startup.

[SD] Improved the access performance of the SD card.

[Audio] Updated a sample (audio_recorder) to perform DSP filtering in MicFrontend.

New features and feature enhancements are available.

This release has a new bootloader which have to be loaded before use.

[GNSS] Support to output "DC Report" ($QZQSM) from NMEA sentences.

[GNSS] Improve stability when starting positioning by using hot start.

New features and feature enhancements are available.

This release has a new DSP binary and bootloader which have to be loaded before use.

[AI] Support Multicore DNN Runtime.

[Sensor] Add "step-counter" with Activity Recognition.

[Sensor] Add a pressure sensor driver for "BM1383AGLV" on Rohm Add-on board.

[Image] Add "libjpeg" library for JPEG decode.

[Network] Add mbedTLS version 2.6.0.

[Tool] Improve the progress bar when uploading your application.

[Graphics] Add NX Graphics example applications.

New features and feature enhancements are available.

[Camera] Support Gamma correction.

[Audio] Support I2S output with Object Level API.

No new update in this release for this repository.

New features and feature enhancements are available.

[Audio] Support 192kHz/48kHz sampling, 24bit wav recording.

[Audio] Support selectable api for audio analog drive power for AC-out or speaker-out.

[Camera] Support auto exposure and manual exposure time setting.

[Camera] Support still picture with specified number of burst capture.

New features and feature enhancements are available.

This release has a new DSP binary and bootloader which have to be loaded before use.

[Camera] Capturing of uncompressed and JPEG compressed image data by using ISX012 camera module.

[DNNRT] Deep Neural Network runtime library added.

[GNSS] Japanese GNSS satellite QZSS Michibiki: L1C/A complementation signal and L1S augmentation signal are now supported.

[Audio] Supports 88.2/96/176.4kHz, 24bit wav decoding.

[Other] ARM(tm) CMSIS library added.

[Other] PWM pins number 3, 5, 6, 9 are changed to stay high just after startup.

[Other] PWM sample application added.

[Other] uname command in NutShell now shows SDK version.

Some audio advanced features are released.

Support monaural sound playback in WAV format file.