When the SPI peripheral is disabled, the output lines will become HIGH-Z.
If the clk pin is not pulled HIGH or LOW, connected SPI slaves will start drawing current expectedly.
Since the "EXTI->PR" is an "rc_w1" type of register, we need to be
careful when clearing our interrupt flag in the register. When there
are multiple interrupt flags set in the register, the "|=" operation
will mistakenly clear all pending interrupts instead of just ours.
- On pwm_poweron, the PWM resolution was not restored. (A custom resolution was
only usable if, PWM channel 0 is not used. That configuration is not common,
so this bug was likely never triggered)
- Disabled a work around to prevent flickering:
- Previously, PWM was disconnected on level 0% and 100%
- This increases the run time of `pwm_set()`
- It prevents using the PWM for wave form generation via DDS, as the wave
noticeably jumps when reaching 0% or 100%
- Slightly reduces memory requirements: 2 Bytes of RAM, 112 Bytes of ROM
- Tested with avr-gcc 9.2.0 and LTO enabled
Drop `#include "irq.h"` in `cpu.h`, which was there for a legacy work around.
A bunch of missing includes of `irq.h` materialized due to this and were
fixed.
- Drop duplicated `cpu.c` and `cpu_conf.h`: Those are already provided by
`cpu/atmega_common`.
- The higher values for default stack size of `cpu_conf.h` in
`cpu/atmega_common` results in three tests no longer fitting the available RAM
==> Updated the Makefile.ci to skip linking of those tests for the Arduino
Leonardo
We don't need to define FLASHPAGE_SIZE and FLASHPAGE_NUMOF ourself if
the BPROT peripheral is present.
Now why nrf52840 doesn't have it, I don't know, but for nrf52832 and
nrf23811 the values in BPROT_REGIONS_SIZE and BPROT_REGIONS_NUM match
the values manually provided here before.
__set_PRIMASK(state) had been directly inlined to avoid a hardfault that
occured when branching after waking up from sleep with DBG_STANDBY,
DBG_STOP or DBG_SLEEP set in DBG_CR.
The hardfault occured when returning from the branch to irq_restore,
since the function is now inlined the branch does not happen either.
Refer to #14015 for more details.
irq_% are not inlined by the compiler which leads to it branching
to a function that actually implement a single machine instruction.
Inlining these functions makes the call more efficient as well as
saving some bytes in ROM.
Flashing an ESP board first requires the creation of a flash image from the ELF file. This is realized in the `preflash` target. However, the `preflash` target only depends on the variable `BUILD_BEFORE_FLASH` but on the ELF file. Therefore, the variable `BUILD_BEFORE_FLASH` must be set to the ELF file to ensure that when using multiple make processes, the compilation of the ELF file is completed before the flash image is created.
In #12955 optimization was switched to O2 because with the '-Os'
option, the ESP32 hangs sporadically in 'tests/bench*' if
interrupts where disabled too early by benchmark tests.
Since it hasn't been reproduced since and in #13196 O2 was causing
un-explained hardfaults, since the aforementioned issue could not
be reproduced we switch back to Os by removing O2, as Os will be
used by default.
Writing a 1 bit clears the interrupt flag, writing with |= is thus
uneccecary (and actually an error as this would clear *all* flags).
This cleanup was already done for rtt.c, but rtc.c missed out.
This is needed to switch the SCLK_HF source clock safely.
Note: these functions work on cc26x2_cc13x2 and cc26x0, but special care
needs to be taken when calling on cc26x0 some of these functions, as
ADDI_SEM needs to be taken.
Signed-off-by: Jean Pierre Dudey <jeandudey@hotmail.com>
The sam0 MCUs all have a DAC peripheral.
The DAC has a resulution of 10 or 12 bits and can have one or two
output channels.
The output pins are always hard-wired to PA2 for DAC0 and PA5 for DAC1
if it exists.
On the same54-xpro I would only get a max value of ~1V when using the
internal reference, so I configured it to use an external voltage reference.
The external reference pin is hard-wired to PA3, so you'll have to connect
that to 3.3V to get results.
- Added ADI instruction offsets
- Added register banks and address bases for masked access (writes).
Signed-off-by: Jean Pierre Dudey <jeandudey@hotmail.com>
- Changed "meh" to "Reserved".
- Renamed CTL to CFG to match SDK/TRM name.
- Added constants for VIMS and FLASH necessary to trim registers.
Signed-off-by: Jean Pierre Dudey <jeandudey@hotmail.com>
- Fixes padding.
- Updates documentation.
- Removes documentation longer than 80-chars for the registers values.
Signed-off-by: Jean Pierre Dudey <jeandudey@hotmail.com>
This function is needed to setup the AUX operational mode at startup,
also used for managing low-power states.
Signed-off-by: Jean Pierre Dudey <jeandudey@hotmail.com>
