d2384efa80
This commit implements automatic module weak links for all built-in
modules, by searching for "ufoo" in the built-in module list if "foo"
cannot be found. This means that all modules named "ufoo" are always
available as "foo". Also, a port can no longer add any other weak links,
which makes strict the definition of a weak link.
It saves some code size (about 100-200 bytes) on ports that previously had
lots of weak links.
Some changes from the previous behaviour:
- It doesn't intern the non-u module names (eg "foo" is not interned),
which saves code size, but will mean that "import foo" creates a new qstr
(namely "foo") in RAM (unless the importing module is frozen).
- help('modules') no longer lists non-u module names, only the u-variants;
this reduces duplication in the help listing.
Weak links are effectively the same as having a set of symbolic links on
the filesystem that is searched last. So an "import foo" will search
built-in modules first, then all paths in sys.path, then weak links last,
importing "ufoo" if it exists. Thus a file called "foo.py" somewhere in
sys.path will still have precedence over the weak link of "foo" to "ufoo".
See issues: #1740, #4449, #5229, #5241.
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|---|---|---|
| .. | ||
| src | ||
| .gitignore | ||
| CMakeLists.txt | ||
| Kbuild | ||
| Makefile | ||
| Makefile.zephyr | ||
| README.md | ||
| help.c | ||
| machine_i2c.c | ||
| machine_pin.c | ||
| main.c | ||
| make-bin-testsuite | ||
| make-minimal | ||
| makeprj.py | ||
| modmachine.c | ||
| modmachine.h | ||
| modusocket.c | ||
| modutime.c | ||
| modzephyr.c | ||
| modzsensor.c | ||
| mpconfigport.h | ||
| mpconfigport_bin_testsuite.h | ||
| mpconfigport_minimal.h | ||
| mphalport.h | ||
| prj_96b_carbon.conf | ||
| prj_base.conf | ||
| prj_disco_l475_iot1.conf | ||
| prj_frdm_k64f.conf | ||
| prj_frdm_kw41z.conf | ||
| prj_minimal.conf | ||
| prj_qemu_cortex_m3.conf | ||
| prj_qemu_x86.conf | ||
| uart_core.c | ||
| z_config.mk | ||
README.md
MicroPython port to Zephyr RTOS
This is an work-in-progress port of MicroPython to Zephyr RTOS (http://zephyrproject.org).
This port requires Zephyr version 1.8 or higher. All boards supported by Zephyr (with standard level of features support, like UART console) should work with MicroPython (but not all were tested).
Features supported at this time:
- REPL (interactive prompt) over Zephyr UART console.
utimemodule for time measurements and delays.machine.Pinclass for GPIO control.machine.I2Cclass for I2C control.usocketmodule for networking (IPv4/IPv6).- "Frozen modules" support to allow to bundle Python modules together with firmware. Including complete applications, including with run-on-boot capability.
Over time, bindings for various Zephyr subsystems may be added.
Building
Follow to Zephyr web site for Getting Started instruction of installing Zephyr SDK, getting Zephyr source code, and setting up development environment. (Direct link: https://www.zephyrproject.org/doc/getting_started/getting_started.html). You may want to build Zephyr's own sample applications to make sure your setup is correct.
To build MicroPython port, in the port subdirectory (zephyr/), run:
make BOARD=<board>
If you don't specify BOARD, the default is qemu_x86 (x86 target running
in QEMU emulator). Consult Zephyr documentation above for the list of
supported boards.
Running
To run the resulting firmware in QEMU (for BOARDs like qemu_x86, qemu_cortex_m3):
make run
With the default configuration, networking is now enabled, so you need to follow instructions in https://wiki.zephyrproject.org/view/Networking-with-Qemu to setup host side of TAP/SLIP networking. If you get error like:
could not connect serial device to character backend 'unix:/tmp/slip.sock'
it's a sign that you didn't followed instructions above. If you would like to just run it quickly without extra setup, see "minimal" build below.
For deploying/flashing a firmware on a real board, follow Zephyr documentation for a given board, including known issues for that board (if any). (Mind again that networking is enabled for the default build, so you should know if there're any special requirements in that regard, cf. for example QEMU networking requirements above; real hardware boards generally should not have any special requirements, unless there're known issues).
Quick example
To blink an LED:
import time
from machine import Pin
LED = Pin(("GPIO_1", 21), Pin.OUT)
while True:
LED.value(1)
time.sleep(0.5)
LED.value(0)
time.sleep(0.5)
The above code uses an LED location for a FRDM-K64F board (port B, pin 21; following Zephyr conventions port are identified by "GPIO_x", where x starts from 0). You will need to adjust it for another board (using board's reference materials). To execute the above sample, copy it to clipboard, in MicroPython REPL enter "paste mode" using Ctrl+E, paste clipboard, press Ctrl+D to finish paste mode and start execution.
Example of using I2C to scan for I2C slaves:
from machine import I2C
i2c = I2C("I2C_0")
i2c.scan()
Minimal build
MicroPython is committed to maintain minimal binary size for Zephyr port below 128KB, as long as Zephyr project is committed to maintain stable minimal size of their kernel (which they appear to be). Note that at such size, there is no support for any Zephyr features beyond REPL over UART, and only very minimal set of builtin Python modules is available. Thus, this build is more suitable for code size control and quick demonstrations on smaller systems. It's also suitable for careful enabling of features one by one to achieve needed functionality and code size. This is in the contrast to the "default" build, which may get more and more features enabled over time.
To make a minimal build:
./make-minimal BOARD=<board>
To run a minimal build in QEMU without requiring TAP networking setup run the following after you built image with the previous command:
./make-minimal BOARD=<qemu_x86_nommu|qemu_x86|qemu_cortex_m3> run