This commit adds 'clock-frequency' property to the cpu nodes.
The clock frequency specified in the added property is used
during platform configuration. Examples:
- The SWO logger uses clock frequency to configure SWO output.
- Plenty of platforms need CPU clock specified for their HAL.
- Most of devices with USB needs information about CPU clock
in order to configure USB clock source.
Signed-off-by: Piotr Zięcik <piotr.ziecik@nordicsemi.no>
The DT spec. only has "okay" and not "ok". The Linux kernel has around
12k "okay"s and 300 "ok"s.
The scripts/dts scripts only check for "disabled", so should be safe re.
those at least.
The replacement was done with
git ls-files | xargs sed -i 's/status\s*=\s*"ok"/status = "okay"/'
Signed-off-by: Ulf Magnusson <Ulf.Magnusson@nordicsemi.no>
Update the files which contain no license information with the
'Apache-2.0' SPDX license identifier. Many source files in the tree are
missing licensing information, which makes it harder for compliance
tools to determine the correct license.
By default all files without license information are under the default
license of Zephyr, which is Apache version 2.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Linking to API material requires knowing the pecularities of how
doxygen, sphinx, and breathe work. In an attempt to hide some of this
we're preparing the current docs to allow use of configuration defaults
that will let us more simply use a default role that will hunt for a
reference target in the various domains that are available by using a
default "role" of "all". This will let us use the simple notation
`functionname` or `typename` without fully specifying the reference as
:c:func:`functionname`.
This patch cleans up exising docs that were (incorrectly) using single
backtics where double backtics should have been used, and also found
some typos (such as a space between the role name and the reference,
such as :file: `filename`, and a missing colon such as
c:func:`functionname`)
This is a start to address issue #14313
Signed-off-by: David B. Kinder <david.b.kinder@intel.com>
Be consistent in how board docs are named and move all to index.rst.
This will make the URL to the board documentation predictable and easier
to remember.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Now that all supported xtensa boards use DTS we can move the Kconfig
setting to the arch level. Remove HAS_DTS from board Kconfig files.
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
In preparation for introducing a warning.
Unquoted string defaults work through a quirk of Kconfig (undefined
symbols get their name as their string value), but look confusing. It's
done inconsistently now too.
Suggested by Kumar Gala.
Signed-off-by: Ulf Magnusson <Ulf.Magnusson@nordicsemi.no>
We want to support other toolchain not based on GCC, so the variable is
confusing, use ZEPHYR_TOOLCHAIN_VARIANT instead.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Instead of accessing the environment variable ZEPHYR_BASE every time we
require accessing the source code root, use an intermediate variable
that has OS path separators correctly set to '/' to avoid issues on
Windows.
Note: This removes the ZEPHYR_SOURCE_DIR CMake variable. External
applications using that will need to change to use the new ZEPHYR_BASE
variable.
Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>
Update board definitions with supported feature. This is temporary
until we have full coverage for device drivers in DTS, then we can use
DTS instead.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
The various runners (flash/debug scripts) use environment variables to
take arguments. This is legacy behavior which is not desirable.
Use command line arguments instead.
Note: this leaves more general environment variables with publicly
documented behavior in place for now, for compatibility, e.g.:
ZEPHYR_FLASH_OVER_DFU, OPENSDA_FW, ESP_IDF_PATH, PYOCD_DAPARG
For example, when using dfu-util to flash arduino_101, instead of
setting DFUUTIL_PID, DFUUTIL_ALT, and DFUUTIL_IMG environment
variables, have the script invocation look like this:
python3 .../zephyr_flash_debug.py dfu-util flash \
[common arguments omitted] \
--pid=8087:0aba --alt=x86_app \
--img=.../build/zephyr/zephyr.bin
Make similar changes for other runners (openocd, etc.) and
targets (debug, debugserver).
To implement this in the scripts:
- have the individual scripts/support/runner/some-runner.py files
register their own command line arguments
- teach them to construct instances from arguments, not the
environment
- have zephyr_flash_debug.py request runners to register command
line argument parsers, and handle arguments
In the build system:
- add a new board_runner_args() extension function that board.cmake
files can use to add to the zephyr_flash_debug.py command line
- adjust cmake/flash/CMakeLists.txt to invoke with arguments
- add new helper include files for each runner (like
boards/common/dfu-util.board.cmake, etc.), which add default
options as needed and then add on overrides from
board_runner_args() calls
- update board.cmake files to use the new includes and extension
This implied some tweaking when using openocd to make the CMake string
escaping and unescaping work properly.
Signed-off-by: Marti Bolivar <marti@opensourcefoundries.com>
The Python-based runners have replaced the old shell scripts. Refactor
the build system accordingly:
- FLASH_SCRIPT is now BOARD_FLASH_RUNNER
- DEBUG_SCRIPT is now BOARD_DEBUG_RUNNER
The values, rather than being the names of files, are now the names of
runners in scripts/support/runner. They are still short, descriptive
names like "openocd", "jlink", "em-starterkit", etc.
Adjust the zephyr_flash_debug.py call and runner internals
accordingly. Have each runner class report a name and the commands it
can handle. This lets us move some boilerplate from each do_run()
method into the common run() routine, and enables further improvements
in future patches.
The handles_command() method is temporary, and will be replaced by a
more general mechanism for describing runner capabilities in a
subsequent patch. The initial use case for extending this is to add
device tree awareness to the runners.
To try to avoid user confusion, abort the configuration if an
xxx_SCRIPT is defined.
Signed-off-by: Marti Bolivar <marti@opensourcefoundries.com>
Footnote reference in a code block is ignored. This text shouldn't
really be in a code block anyway, so just make it a paragraph with a
trailing footnote reference.
Signed-off-by: David B. Kinder <david.b.kinder@intel.com>
Introducing CMake is an important step in a larger effort to make
Zephyr easy to use for application developers working on different
platforms with different development environment needs.
Simplified, this change retains Kconfig as-is, and replaces all
Makefiles with CMakeLists.txt. The DSL-like Make language that KBuild
offers is replaced by a set of CMake extentions. These extentions have
either provided simple one-to-one translations of KBuild features or
introduced new concepts that replace KBuild concepts.
This is a breaking change for existing test infrastructure and build
scripts that are maintained out-of-tree. But for FW itself, no porting
should be necessary.
For users that just want to continue their work with minimal
disruption the following should suffice:
Install CMake 3.8.2+
Port any out-of-tree Makefiles to CMake.
Learn the absolute minimum about the new command line interface:
$ cd samples/hello_world
$ mkdir build && cd build
$ cmake -DBOARD=nrf52_pca10040 ..
$ cd build
$ make
PR: zephyrproject-rtos#4692
docs: http://docs.zephyrproject.org/getting_started/getting_started.html
Signed-off-by: Sebastian Boe <sebastian.boe@nordicsemi.no>
This should clear up some of the confusion with random number
generators and drivers that obtain entropy from the hardware. Also,
many hardware number generators have limited bandwidth, so it's natural
for their output to be only used for seeding a random number generator.
Signed-off-by: Leandro Pereira <leandro.pereira@intel.com>
Clean up & rework JTAG documentation for ESP-32 boards to provide full
commands and clarify gotchas.
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Supports both master and slave mode, standard and fast modes,
configurable timeouts, and a few other tunable settings.
Signed-off-by: Leandro Pereira <leandro.pereira@intel.com>
ESP-IDF is in constant development and it's likely that files Zephyr
depends on will be moved, removed, or renamed. Make a note that an
older version of ESP-IDF should be used instead.
Closes#1538.
Signed-off-by: Leandro Pereira <leandro.pereira@intel.com>
The ESP-WROOM-32 board exits the bootloader at 40 MHz, not 160 MHz as
suggested by documentation. The CCOUNT special register works as
advertised, but not at the expected rate. This was verified by
timestamping (at the host) the output of a dependency-free loop that
looks like:
int key = irq_lock();
while(1) {
u32_t i, count;
volatile int dummy;
for(i = 0; i < 5000000; i++) {
dummy++;
}
__asm__ volatile ("rsr.ccount %0" : "=a"(count));
printk("%d\n", count);
}
The SoC has a fairly robust set of possible CPU clocking modes, but we
don't have a driver for that yet. Until we do, set the single
configured CPU frequency to the one we get at runtime.
Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
The Xtensa port was the only one remaining to be converted to the new
way of connecting interrupts in Zephyr. Some things are still
unconverted, mainly the exception table, and this will be performed
another time.
Of note: _irq_priority_set() isn't called on _ARCH_IRQ_CONNECT(), since
IRQs can't change priority on Xtensa: while the architecture has the
concept of interrupt priority levels, each line has a fixed level and
can't be changed.
Signed-off-by: Leandro Pereira <leandro.pereira@intel.com>
The random number generator from ESP32 uses noise from Wi-Fi and
Bluetooth radios. If these are off, a pseudo-random number is
generated instead; this is currently the case, but even though it's a
black box, it's arguably better than returning a timestamp as a
pseudo-random number generator.
According to the ESP32 Technical Reference manual, the RNG passed the
Dieharder Random Number Test suite (version 3.31.1)[1], but nothing has
been said about the quality of the PRNG.
The RNG register is read directly; no effort is made to use its
contents to feed an entropy pool in a way that's similar to /dev/random
on POSIX systems, as no such subsystem exists on Zephyr at the moment.
[1] http://webhome.phy.duke.edu/~rgb/General/dieharder.php
Signed-off-by: Leandro Pereira <leandro.pereira@intel.com>
This provides basic GPIO support, with interrupts, and the ability to
read and write to ports on a pin-by-pin basis.
Jira: ZEP-2286
Signed-off-by: Leandro Pereira <leandro.pereira@intel.com>
This implements a driver for the pin multiplexer as present in the ESP32
SoCs.
All APIs are supported.
Jira: ZEP-2297
Signed-off-by: Leandro Pereira <leandro.pereira@intel.com>
The documentation details how to install and configure all the
pre-requisites to build Zephyr for the ESP32 SoC, including using the
vendor SDK and toolchain, the flashing tool, and how to use JTAG.
Jira: ZEP-2109
Signed-off-by: Leandro Pereira <leandro.pereira@intel.com>
This flashes Zephyr at 0x1000: that's where the first stage bootloader,
part of the ESP32 ROM, expects to find an "image header".
The second-stage bootloader, part of ESP-IDF, isn't used by the Zephyr
port. However, the bootloader can be used if desired; please refer to
the ESP-IDF documentation on how to set up partitions tables and use
the bootloader.
The following environment variables will affect the ESP32 flashing
process:
Variable Default value
ESP_DEVICE /dev/ttyUSB0
ESP_BAUD_RATE 921600
ESP_FLASH_SIZE detect
ESP_FLASH_FREQ 40m
ESP_FLASH_MODE dio
ESP_TOOL espidf
It's impossible to determine which serial port the ESP32 board is
connected to, as it uses a generic RS232-USB converter. The default of
/dev/ttyUSB0 is provided as that's often the assigned name on a Linux
machine without any other such converters.
The baud rate of 921600bps is recommended. If experiencing issues when
flashing, try halving the value a few times (460800, 230400, 115200,
etc). It might be necessary to change the flash frequency or the flash
mode; please refer to the esptool documentation for guidance on these
settings.
If ${ESP_TOOL} is set to "espidf", the esptool.py script found within
ESP-IDF will be used. Otherwise, this variable is handled as a path to
the tool.
Signed-off-by: Leandro Pereira <leandro.pereira@intel.com>
The first stage bootloader, part of the ESP32 ROM, already sets up
a stack that's sufficient to execute C programs. So, instead of
implementing __stack() in assembly, do it in C to simplify things
slightly.
This ESP32-specific initialization will perform the following:
- Disable the watchdog timer that's enabled by the bootloader
- Move exception handlers to IRAM
- Disable normal interrupts
- Disable the second CPU
- Zero out the BSS segment
Things that might be performed in the future include setting up the
CPU frequency, memory protection regions, and enabling the flash
cache.
Signed-off-by: Leandro Pereira <leandro.pereira@intel.com>
Unconditionally use CONFIG_SIMULATOR_XTENSA to determine if XT_SIMULATOR
or XT_BOARD should be defined.
If CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC, also define XT_CLOCK_FREQ. This
isn't ideal as the clock frequency might be changed in runtime and this
effectively makes it a constant.
Until we can control the clock frequency in runtime, this will suffice.
Signed-off-by: Leandro Pereira <leandro.pereira@intel.com>
This is a minimal driver enabling console output during the port
bringup. While the driver works, only one of the three UART devices
are supported, and there isn't any way to change any parameters or
use interrupts. This will most likely be superceded by a proper
driver after the port has matured.
Signed-off-by: Leandro Pereira <leandro.pereira@intel.com>
Piotr Zięcik