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.
Remove the direct use of the microsecond and low power ticker from
the tests. This enforces that sleep mode is properly locked when
using timers. Furthermore, this prepares the codebase for new ticker
changes which allow differing clock frequencies and timer bit widths.
Release the deep sleep lock when running instances of the Timer class
are deleted. This ensures that deep sleep locks are properly released
by the Timer class.
Add passthrough APIs to enable the flow control and format methods from
SerialBase to be accessed.
Modify the RX data pump so it stops reading data and disables the IRQ
when the buffer is full, to allow UART automatic flow control to work.
In principle it would also be possible as a future enhancement to
provide XON/XOFF flow control, or manual RTS/CTS control using GPIO, but
this commit at least restores the functionality present in Serial,
SerialBase and RawSerial that was missing in UARTSerial.
When the RTOS is present and the tickless mode is not implemented, it is
expected that the next tick issued by the Systick timer will wake up the MCU.
However nothing prevents an implementation of the ARM architecture to gate the
systick clock signal upon sleep entry.
Therefore on those targets sleep shall be prohibited if the RTOS is present and the
tickless mode is not implemented.
To ease life of porters , a new option has been added in the device add list:
STCLK_OF_DURING_SLEEP. This option expose that the target turn of the systick
clock during sleep.
Targets which exhibit such behavior shall add this define in their device_has list.
Deepika
Jimmy Brisson
bcostm
Maciej Bocianski
Christopher Haster
Shrikant Tudavekar
David Walters
Hasnain Virk
adustm
Yuguo Zou
Jaeden Amero
Laurent MEUNIER
Russ Butler
jeromecoutant
Kevin Bracey
Anna Bridge
Vincent Coubard
Jaakko Heikkilä