The use of mktime was causing a fault when called in interrupt handler because on GCC it lock the mutex protecting the environment, To overcome this issue, this patch add dedicated routine to convert a time_t into a tm and vice versa.
In the process mktime has been optimized and is now an order of magnitude faster than the routines present in the C library.
commit f7bc126 (Re-work Rtl8195AM ticker) tried to address ticker drifting
issue, but in fact broke ticker functionality. This patch adjusts us_ticker
porting to unbreak it, and to fix the following tests:
mbed-os-tests-mbed_drivers-ticker
mbed-os-tests-mbed_drivers-timeout
mbed-os-tests-mbedmicro-rtos-mbed-isr
mbed-os-features-frameworks-utest-tests-unit_tests-minimal_async_scheduler
mbed-os-features-frameworks-utest-tests-unit_tests-case_control_async
mbed-os-features-frameworks-utest-tests-unit_tests-case_async_validate
Changes are:
1. Dont disable timer after every us_ticker interrupt. That basically
breaks ticker functionality.
2. Fine-tune us to tick conversion macro. Previous conversion method
yields 1 tick drift every 2 ms.
3. Remove special placement of ticker objects. No longer necessary.
Signed-off-by: Tony Wu <tonywu@realtek.com>
From C++11 and beyond string literals must be seperated by space
so that they are recongizable as seperate tokens.
Context macro in PPPCellularInterface (CTX) has been causing issues
as it was not augmented with a space from a nearby string literal.
ARMC6 support required ARM compiler support as mandatory requirement which
should not be the case. Cortex-M23/M33 devices are not suuported by ARM compiler5
Adding ARMC6 without ARM in target.json should work now.
As reported by MBED user Fran6Jack:
I2C bus are usually 5V tolerant on all STM32 processor.
If an external device on the I2C bus requires 5V operation,
we usually acheive it by using 5V external pull-ups on the bus.
Since signaling uses open-drain output on I2C for both signal SCL and SDA
any 5V tolerant MCU will work on a 5V I2C bus. Having pull-up activated on a 5V externally pull bus, cause the pin to clamp on the STM32 die diode and could damage the IC (There is a note in STM32 datasheet specifying this issue).
It is understood by all the community that I2C bus should always be
externally pulled by physical resistor. I2C initialization should then
be ALWAYS OpenDrainNoPull by default.
Up to now, this I2C driver was setting pull up by default as it helps
basic testing, like 1 master and 1 slave, conencted with 2 wires without
any external pull ups. This will not work anymore after this commit and
applications tests or examples needs to be modified to explicitely
configure pull ups ... But it is safer to follow reference manual
guidelines.
ccli8
cyliangtw
Tony Wu
Mahadevan Mahesh
Jimmy Brisson
jeromecoutant
mbedNoobNinja
Anna Bridge
Arto Kinnunen
Deepika
bcostm
Maciej Bocianski
Christopher Haster
Shrikant Tudavekar
David Walters
Hasnain Virk
adustm
Yuguo Zou
Jaeden Amero
Laurent MEUNIER