Now, MCU is able to go in stop mode if necessary when
periph_pm feature is activated.
Regarding LPSDSR bit that deactivates or not regulator in stop
mode, it is up to the user to set/clear this bit. In order
to save power, voltage regulator can be set in low power state
during stop mode but it increases wakeup time.
Signed-off-by: Aurelien Fillau <aurelien.fillau@gmail.com>
* Add support for the STM32 encoder interface
* The STM32 only supports X2 and X4 modes.
* Enable interrupt handler on counter overflow
* Add simple test code for QDEC based on nucleo-f401 board
Signed-off-by: Gilles DOFFE <g.doffe@gmail.com>
Instead of using `weak` function definitions, this PR handles
default implementations using `PROVIDES_x` defines, allowing
for cpus/pm realted modules to use their own implementations.
- removed neccessity to define empty `DAC_NUMOF 0` for each STM
base board
- adapted all board configs to this
- joined stm32f2 to use common DAC driver
- improved code of DAC driver
Implements workaround 1 (use __DSB()) proposed in the stm32 errata
It was possible to lose data when you configure a peripheral
right after enabling its clock
