This driver is compliant with the candev interface. It has been tested
with STM32F0 and STM32F2 and STM32F413 ONLY at this time but should be
compliant with other STM32Fx devices
Add support for specifying data bits, stop bits and parity at
runtime.
Introduce feature periph_uart_modecfg for uart_mode() till all
other CPUs implement it.
STM32 L1, F1, F2, F4 supports following modes:
* 7E1, 7E2
* 7O1, 7O2
* 8N1, 8N2
* 8E1, 8E2
* 8O1, 8O2
STM32 L0, L4, F0, F3, F7 supports following modes:
* 6E1, 6E2
* 6O1, 6O2
* 7E1, 7E2
* 7O1, 7O2
* 7N1, 7N2
* 8N1, 8N2
* 8E1, 8E2
* 8O1, 8O2
Use USART_CR1_M1 macro to detect 7-bit support because
even inside one family there could be devices that don't
support 7-bit mode. So just using a family macro is not
enough.
As stated in the datasheets for L0, L4, F0, F3, F7 devices,
data bits can only be changed when UART is disabled (UE=0).
Introduce uart_stop() routine to satisfy this requirement.
STM32 UART adds parity to the MSB of a byte to send. The same
also applies to the received bytes. As a result this bit must
be masked in order to get the pure data.
Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
Refactors i2c_2 to match the structure of i2c_1 better.
Corrects functionality issues.
Allows the common implementation of read_regs and write_regs.
Documents constraints of hardware.
Matches error messages with API.
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.
- unified dbp, hsi, and lfclk functions
- all of them now work for all STM32 CPUs
- renamed from bdp to dbp as this is the expression used
in the reference manuals (old naming was a typo...)
- 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
