Commit Graph

11 Commits

Author SHA1 Message Date
Damien George
ea7e747979 stm32: Add support for STM32F0 MCUs. 2018-05-28 21:49:49 +10:00
Damien George
5c0685912f stm32/timer: Make timer_get_source_freq more efficient by using regs.
Use direct register access to get the APB clock divider.  This reduces code
size and makes the code more efficient.
2018-05-28 21:46:20 +10:00
Damien George
cb3456ddfe stm32: Don't use %lu or %lx for formatting, use just %u or %x.
On this 32-bit arch there's no need to use the long version of the format
specifier.  It's only there to appease the compiler which checks the type
of the args passed to printf.  Removing the "l" saves a bit of code space.
2018-05-04 15:52:03 +10:00
Damien George
a03e6c1e05 stm32/irq: Define IRQ priorities directly as encoded hardware values.
For a given IRQn (eg UART) there's no need to carry around both a PRI and
SUBPRI value (eg IRQ_PRI_UART, IRQ_SUBPRI_UART).  Instead, the IRQ_PRI_UART
value has been changed in this patch to be the encoded hardware value,
using NVIC_EncodePriority.  This way the NVIC_SetPriority function can be
used directly, instead of going through HAL_NVIC_SetPriority which must do
extra processing to encode the PRI+SUBPRI.

For a priority grouping of 4 (4 bits for preempt priority, 0 bits for the
sub-priority), which is used in the stm32 port, the IRQ_PRI_xxx constants
remain unchanged in their value.

This patch also "fixes" the use of raise_irq_pri() which should be passed
the encoded value (but as mentioned above the unencoded value is the same
as the encoded value for priority grouping 4, so there was no bug from this
error).
2018-05-02 14:41:02 +10:00
Damien George
e37b8ba5a5 stm32: Use STM32xx macros instead of MCU_SERIES_xx to select MCU type.
The CMSIS files for the STM32 range provide macros to distinguish between
the different MCU series: STM32F4, STM32F7, STM32H7, STM32L4, etc.  Prefer
to use these instead of custom ones.
2018-03-17 10:42:50 +11:00
iabdalkader
0989e0cdff stm32/timer: Add Timer support for H7 MCUs. 2018-03-09 15:10:46 +11:00
Damien George
8aad22fdca stm32/timer: Support MCUs that don't have TIM4 and/or TIM5. 2018-02-13 15:53:39 +11:00
Damien George
3eb0694b97 stm32: Update HAL macro and constant names to use newer versions.
Newer versions of the HAL use names which are cleaner and more
self-consistent amongst the HAL itself.  This patch switches to use those
names in most places so it is easier to update the HAL in the future.
2018-02-13 15:37:35 +11:00
Damien George
d29b709642 stm32/timer: Enable ARPE so that timer freq can be changed smoothly.
The timer prescaler is buffered by default, and this patch enables ARPE
which buffers the auto-reload register.  With both of these registers
buffered it's now possible to smoothly change the timer's frequency and
have a smoothly varying PWM output.
2017-09-25 15:25:08 +10:00
Damien George
d7cd1d2027 stm32/timer: Make pyb.Timer() instances persistent.
Prior to this patch calling pyb.Timer(id) would always create a new timer
instance, even if there was an existing one.  This patch fixes this
behaviour to match other peripherals, like UART, such that constructing a
timer with just the id will retrieve any existing instances.

The patch also refactors the way timers are validated on construction to
simplify and reduce code size.
2017-09-13 16:20:42 +10:00
Damien George
01dd7804b8 ports: Make new ports/ sub-directory and move all ports there.
This is to keep the top-level directory clean, to make it clear what is
core and what is a port, and to allow the repository to grow with new ports
in a sustainable way.
2017-09-06 13:40:51 +10:00