mbed-os-6.0.0-alpha-2

We are pleased to announce the Mbed OS 6.0.0-alpha-2 release is now available.

Summary

This is the second preview of approaching Mbed OS 6.0 release. We continue our efforts to remove previously deprecated APIs and features. This release intentionally breaks compatibility both with Mbed OS 5 series and previous Mbed OS 6 preview. For details of breaking changes please have a look at the release notes below.

Migration Guide

This section lists specific changes which are part of this release and may
need special attention.

Add an exception for ARMC5 toolchain build

12400

Summary of changes

The Arm Compiler 5 is no longer supported so removed the deprecate warning and added the exception in the build tool to stop building with ARM compiler 5.

Impact of changes

With these changes, Arm compiler 5 build fails

Migration actions required

Upgrade the enviroment to use Arm Compiler 6 refer

Remove CPU usage example from CI build

12335

Summary of changes

• Removed the CPU usage example from the Mbed OS build tool CI configuration as it's deprecated.

Impact of changes

With these changes, Mbed OS CI will no longer build CPU usage example on every PR check.

Ble driver set random static address

12321

Summary of changes

This PR adds the function set_random_address to the HCIDriver class. It allows drivers writer to set the Random Static Address of the controller without using the deprecated API Gap:: setAddress .

This PR supersede #12235 .

MXRT1050 Flash support

12317

Summary of changes

Add Flash support for MXRT1050

Cellular: Remove support for multiple ATHandlers

12305

Summary of changes

This commit removes multi ATHandler support from cellular. This has not been used and causes unnecessary complexity and memory consumption.

Memory statistics of mbed-os-example-cellular with NRF52840_DK + BG96:
GCC:
Total Static RAM memory (data + bss): 29360(+296) bytes
Total Flash memory (text + data): 130660(-832) bytes

ARM:
Total Static RAM memory (data + bss): 261554(+8) bytes
Total Flash memory (text + data): 127573(-1193) bytes

IAR:
Total Static RAM memory (data + bss): 25479(+296) bytes
Total Flash memory (text + data): 102418(-527) bytes

RAM increase is because now ATHandler is no longer created with new -operator but is now member of AT_CellularDevice, so image tool is able to count it. Actual total RAM consumption has decreased due to removed variables.

Impact of changes

Major changes:

• Dependency to FileHandle removed from base classes
• AT_CellularDevice owns the default FileHandle and shares it with AT -classes
• Controlling hang-up -detection moved as CellularContext::configure_hup(). Cannot be configured via CellularDevice any more.

Migration actions required

• Enabling hang-up detection is now configured using CellularContext::configure_hup(). CellularDevice::enable_hup() and context creation with BufferedSerial handle removed. Cellular will now automatically enable and disable HUP when switching between AT and PPP mode.
• CellularDevice::create_context() no longer takes FileHandle as parameter
• CellularDevice::get_file_handle() removed. ATHandler::get_file_handle() can be used instead.

MIMXRT1050: Add Watchdog support

12299

Summary of changes

Add WatchDog support for MXRT1050 EVK

Cellular: Remove API's empty default implemetations

12293

Summary of changes

Cleanup the Cellular API by removing empty default implementations and making them pure virtual.

Targeted for release-version 6.0.0.

Impact of changes

• Classes inheriting CellularDevice will have to have implementation for the new pure virtual methods:
• clear()
• get_context_list()
  
  
• Classes inheriting CellularContext do not have to have implementation for:
• get_netmask()
• get_gateway()

if they do not differ from the NetworkInterface's default implemetations:

nsapi_error_t NetworkInterface::get_netmask(SocketAddress *)
{
return NSAPI_ERROR_UNSUPPORTED;
}

nsapi_error_t NetworkInterface::get_gateway(SocketAddress *)
{
return NSAPI_ERROR_UNSUPPORTED;
}

Migration actions required

See Impact of changes section.

Rename "default_lib" to "c_lib".

12278

Summary of changes

• Rename target.default_lib to target.c_lib as it is more meaningful. These changes are done only for MBED OS 5 targets and in the build tool.

Impact of changes

With these changes, target.default_lib attribute is no longer being supported.

Migration actions required

• The target.c_lib is the new attribute used for C library selection. The choice remains unchanged("std" or "small")

unittests: disable coverage report filtering

12273

Summary of changes

Disable coverage report filtering because of poor results.

e.g. mbed test --unittests -r Socket --coverage htmlg
This command will run all unittests with names containing Socket and then create coverage report with the same scheme, filtering all source files with names containing Socket.

The problem is that coverage report will be correct only when filtered test name will be the same as corresponding source file name (to be covered) - the same (-r) pattern is used to filter both test names and source file names used in coverage report

Due to described problems it was decided to disable coverage report filtering.
-r will only filter test names and pattern won't be passed to coverage report generator.

Add KSZ8041 as a supported PHY for the LPC17xx series

12260

Summary of changes

Adds the Microchip KSZ8041 PHY as a supported device for the LPC17xx series.

storage_abstraction: deprecated since Mbed OS 5.5 and now removed

12253

Summary of changes

Removes deprecated API's under hal/storage_abstraction and the folder itself. Only target which had implemented the functionality was K64F and the implementation gets removed with this PR.

Impact of changes

Removes deprecated storage_abstraction API.

Migration actions required

Migration not possible. Developers who were relying on this API should study Mbed OS Storage documentation.

Cellular: Remove friend definitions from cellular state machine

12251

Summary of changes

Instead of defining which classes can access state machine, CellularStateMachine
class is now "a normal" CPP class with public API.

Impact of changes

This is potentially a breaking change but as CellularStateMachine is only used internally there shouldn't be any impact.

Cellular: Remove deprecated CellularDevice::stop()

12249

Summary of changes

Cellular: Remove deprecated CellularDevice::stop()

Impact of changes

Removed method CellularDevice::stop()

Migration actions required

CellularDevice::shutdown() should be used instead.

Cypress: add SoftAP host tests

12240

Summary of changes

Cypress: Initial commit of SoftAP host tests.
Basic SoftAP test with host as STA.

ESP8266: Add built-in hostname resolution handling (disabled by default)

12234

Summary of changes

Fixes #11982 (some routers fail to work with the UDPSocket-approach, but are proved to work when ESP uses its embedded hostname resolution AT command).

The feature is disabled by default and can be enabled in mbed_app.json with "esp8266.built-in-dns": true. When enabled then the synchronous hostname resolution will use the ESP's CIPDOMAIN AT command, but asynchronous resolution will keep on using the UDPSockets as before (no point rewriting the nsapi_dns). Also caching does not work.

I tested with the netsocket-dns testsuite. Obviously caching tests often fail, but if lucky I can get 15/16 passes.

@zhiyong80, please verify if this works with your router.

Impact of changes

None, until user enables the esp8266.built-in-dns option.

Add BufferedSerial class to replace UARTSerial

12207

Summary of changes

Implement the BufferedSerial class to replace UARTSerial. BufferedSerial is UARTSerial renamed to convey the original purpose of the class. Also remove usage of UARTSerial in Mbed OS Core diretories

Update Mbed TLS and Mbed Crypto to latest as of 2019-12-20

12150

Summary of changes

Upgrade to Mbed TLS 2.20.0d1 and Mbed Crypto 3.0.0d0.

Thread: remove methods deprecated in 5.10

12142

Summary of changes

Remove various Thread methods that were deprecated in Mbed OS 5.10

Impact of changes

Code using the old methods will no longer compile

Migration actions required

Uses of the following removed Thread methods need to be replaced:

• Thread::signal_set -> Thread::flags_set
• Thread::signal_clr -> ThisThread::flags_clear
• Thread::signal_wait -> ThisThread::flags_wait_xxx
• Thread::wait -> ThisThread::sleep_for
• Thread::wait_until -> ThisThread::sleep_until
• Thread::yield -> ThisThread::yield
• Thread::gettid -> Thread::get_id or ThisThread::get_id
• Thread::attach_idle_hook -> Kernel::attach_idle_hook
• Thread::attach_terminate_hook -> Kernel::attach_thread_terminate_hook

HAL: Add a get_capabilities() function to ResetReason API

12139

Summary of changes

Add the hal_reset_reason_get_capabilities() function to the ResetReason HAL API to skip the unsupported reason values during HAL & driver tests.

Fixes #11792.

Updated tests:

• tests-mbed_hal-reset_reason,
• tests-mbed_drivers-reset_reason.

Impact of changes

Extend the ResetReason HAL API with the hal_reset_reason_get_capabilities() function. Unsupported reason values are skipped during the greentea tests.

Migration actions required

A default, weak implementation is provided. Every target has to override this weak implementation to provide the correct reset_reason_capabilities_t.

GCC: remove -fno-delete-null-pointer-checks

12023

Summary of changes

For GCC we're being cautious by passing the -fno-delete-null-pointer-checks. This option prevents some optimisation opportunities, so removing it can reduce code size.

One particular optimisation loss occurs in Callback where a test similar to this occurs:

extern void myfunc();

inline void foo(void (*fnptr)())
{
if (fnptr) {
do A;
} else {
do B;
}
};

foo(myfunc);

With -fno-delete-null-pointer-checks, the compiler does not assume that &myfunc is non-null, and inserts the "null check" - seeing if the address is 0. But performing that test of the address is incorrect anyway - if myfunc actually could be at address 0, we'd still want to doA.

Anyway, we do not have an equivalent option enabled for either Clang or IAR, and we have performed clean-ups avoiding issues with apparently-null vector tables in Clang already, for example #10534.

Therefore it should(TM) be safe to remove the option for GCC. We do not have general data or code at address 0, only vectors are likely to be there, so it does not make sense to be globally restricting code generation for that.

Impact of changes

Will reduce image size. Particularly when Callback is in use. Increased optimisation may require code adjustments, exposing undefined behaviour

Migration actions required

If code fails, address undefined behaviour. Eg this null check may now be removed:

int foo(int *ptr)
{
int a = ptr[0];
if (!ptr) { // may be optimised out - compiler can assume non-null because already accessed
return -1;
}
return bar(a);
}

Correct to:

int foo(int *ptr)
{
if (!ptr) {
return -1;
}
int a = ptr[0];
return bar(a);
}

ARMC6: Add a build profile extension with the link-time optimizer enabled

11874

Summary of changes

Add a build profile extension with the link-time optimizer enabled for ARMC6 toolchain.

Known Issues

There are no new known issues with this release.

Contents

Ports for Upcoming Targets

12338
STM32L5 : add DISCO-L562QE board support

12286
Add new target: NUCLEO_L452RE-P

Fixes and Changes

12424
Nuvoton: Fix GPIO IRQ and RTC

12422
Cypress Asset Update

12419
Fix #12290: crash_log_parser on py3

12411
add FLASHIAP in targets.json for KVStore used in PDMC

12409
FIX: LPUART clock source selection should be left to serial driver

12408
LPC408X: Delete the ethernet_api.c files

12407
Disable restricted uart peripheral for NRF52840

12405
EthernetInterface fix detecting change of connection status on ARCH_MAX

12404
M2351: Update BSP and bugfix

12403
FPGA: Enlarge timeout with mbed_hal_fpga_ci_test_shield-i2c

12401
Remove float symbols from apps that use the NFCController class

12400
Add an exception for ARMC5 toolchain build

12399
Cellular: Delete created context if activation fails

12398
Add BlockDevice unittests and fix issues they revealed

12397
Testing: Fix buffer overflow in ATHandler_read_bytes UT test

12396
PDP Type needs to be IPV4V6

12395
I2CEEBlockdevice: fix i2c read return value

12394
Fix SDIO communication issue on Cypress 1M boards and other minor fixes

12393
Fix Musca-A1 gcc linker

12392
Fix psa_key_management_operations

12391
mergify: CI only if PR is without conflicts

12389
Update InterruptIn.h

12386
TEST: fix a bug in ATCmdParser test

12383
Fix thread_sleep_for with zero wake_delay

12382
Fix BufferedSerial visibility of private base class enum enumerators

12380
DISCO_L475VG_IOT01A: Add a list of restricted GPIO pins for testing

12379
Add STDIO UART as restricted for FPGA testing for all targets and support for restricting GPIO

12378
TEST: Refactor mbedmicro tests to use utest framework

12369
LPC1768: Fix ARM toolchain baremetal by defining 2 memory region

12368
Fix NRF52840_DK UART driver and adapt FPGA test

12366
M2351: Support GCC

12364
MIMXRT1050: Update for deep sleep latency

12363
Mergify: fix release version label

12362
TARGET_STM: L0 CUBE SPI async mode send next byte after previous one is read

12357
TARGET_STM32F1: don't set ADC common register when ADC doesn't support it

12356
Fix NRF51, NRF52 gpio_irq_init() function

12353
M2351: Support IAR

12350
implements i2c_free for STM

12349
Nanostack: Update Wi-SUN configuration

12345
USBMSD; NFCEEPROM; mbed_compat: Fix compiler warnings

12344
Unittests for DNS improvements

12342
LPC55S69: Fix UART & GPIO HAL to pass FPGA CI test shield tests

12341
STM32L4: Fix the UART RX & TX data reg bitmasks

12339
Cellular : add modem version in mbed trace

12338
STM32L5 : add DISCO-L562QE board support

12336
Disable write buffering on debug builds.

12335
Remove CPU usage example from CI build

12334
Update cellular drivers/tests for UBLOX_C030_R412M

12333
UDP echotests fix in case of no memory or device busy.

12332
FIX: Disable Analogin D13(PA_5) on some NUCLEO targets

12331
STM32: enable QSPI test with MX25LM51245G octo SPI

12330
Fix FAT filesystem ferror greentea test(SD Component)

12329
AT_CellularStack: crash during TCP test

12327
Doxygen: don't extract static members

12326
Correct SysTimer absolute time calculations

12324
Fix inconsistency between mbed crc and psoc6 crc implementations.

12322
minimal-printf: README correction

12321
Ble driver set random static address

12320
ONME-3433 ESP8266 driver support for UDP get - modified ESP8266 drive

12317
MXRT1050 Flash support

12316
Fix general filesystem greentea test

12315
Add check for APPLE & MACH to fix unit tests on macOS

12312
Fix to sending IPV6 UPD packet fails IPv6 enabled in SoftAP intf

12310
Greentea DNS tests workaround.

12308
Tests: add missing mbed_trace.h multihoming header

12307
Fix the missing retrieve error context function call.

12305
Cellular: Remove support for multiple ATHandlers

12304
QSPIF: Enable QPI mode as a second option, if available

12303
Fix ARM compiler warning for microlib

12302
Remove _LIBCPP_EXTERN_TEMPLATE ARMCC compilation flag

12299
MIMXRT1050: Add Watchdog support

12297
Corrected minimal-printf README

12296
FPGA_CI_TEST_SHIELD : force all peripheral to be tested

12295
STM32H7 correct PWMOUT instances

12293
Cellular: Remove API's empty default implemetations

12292
Multiple labels need to be in an array of strings

12291
Minor optimisation to ATCmdParser unit test code

12287
Fix unittests on windows(mingw)

12286
Add new target: NUCLEO_L452RE-P

12282
Fix for issue #12268 (SerialBase.cpp: fix initialization list)

12281
Cellular: Refactor socket_stack_init() from generic to modem specific

12280
EFM32: add UART and LEUART for EFM32GG11

12278
Rename "default_lib" to "c_lib".

12275
Fix call to sorted by providing key to sort on.

12274
mergify: enable for any pull request

12273
unittests: disable coverage report filtering

12270
BUGFIX: SFDP Sector Map Table Parameter ID LSB is 0x81

12269
mergify: add fixes to the conditions

12267
Fix UDP socket test cases

12265
Refactor unnecessary functions from cellular driver

12263
unittest: fix coverage filtering

12262
Test: Increase the UART flush delay

12261
Cellular: Fix compilation fail with APN lookup enabled

12260
Add KSZ8041 as a supported PHY for the LPC17xx series

12258
Disable the cell AUX UART by default on EP_AGORA

12257
psa: Ensure spaces before partition name comment

12254
unittest: fix ATCmdParser test segfault

12253
storage_abstraction: deprecated since Mbed OS 5.5 and now removed

12251
Cellular: Remove friend definitions from cellular state machine

12249
Cellular: Remove deprecated CellularDevice::stop()

12245
NUCLEO_WB55RG - add device name "STM32WB55RGVx"

12243
Add timer shutdown after time stop on deinit

12241
M2351: Remove LPTICKER to spare memory for non-PSA minimal secure build

12240
Cypress: add SoftAP host tests

12239
Fix DNS multiple query hints to perform both IP4 and IP6 tests

12237
STM serial free: Set pin function only if pin is defined (not NC)

12234
ESP8266: Add built-in hostname resolution handling (disabled by default)

12231
Import latest python scripts and MCUBoot image

12230
TEST: use K64F replace DISCO_L475VG_IOT01A to run some example test

12228
Need RAM and ROM size for compilation

12227
Cellular: AT + QICSGP set up APN fix

12226
target_test - assert if sectors keyword missing

12225
Fix baremetal heap and stack initialisation

12223
RZ_A1H and GR_LYCHEE: Enable bootloader support

12220
NRF5x targets: Replace UARTSerial references with BufferedSerial

12213
ESP8266: Replace UARTSerial references with BufferedSerial

12211
Cellular: Replace UARTSerial references with BufferedSerial

12210
Fix for issue #10725: disable lp-ticker for STM targets which uses RTC/LSI for lp-ticker

12209
NXP target: Replace UARTSerial references with BufferedSerial

12208
ST targets: Replace UARTSerial references with BufferedSerial

12207
Add BufferedSerial class to replace UARTSerial

12201
TARGET_STM: FW driver files refactor proposition

12199
Format targets.json

12198
uARM: Fix deprecate warning printing wrongly for GCC_ARM/IAR toolchain build

12166
NRF52840_DK: Fix baremetal linker error

12160
nRF52: Properly configure nRF SDK for nRF52-series targets

12157
ESP8266: Avoid duplicate data sends

12154
NRF51822: Fix baremetal linker error

12153
Hackathon: Increase coverage of the SPI master FPGA test

12152
Updated 113 targets with missing detect_codes

12150
Update Mbed TLS and Mbed Crypto to latest as of 2019-12-20

12142
Thread: remove methods deprecated in 5.10

12139
HAL: Add a get_capabilities() function to ResetReason API

12060
Improve reliability of KVStore general tests

12035
Preparation for Callback changes

12023
GCC: remove -fno-delete-null-pointer-checks

11904
TOOLS: enable build greentea test coverage for HW

11874
ARMC6: Add a build profile extension with the link-time optimizer enabled

11433
FPGA CI shield: Add a watchdog timing test

Using this release

You can fetch this release from the mbed-os GitHub repository, using the tag "mbed-os-6.0.0-alpha-2".

If you need any help with this release please visit our support page, which provides reference links and details of our support channels.