The RP2040 is new microcontroller from Raspberry Pi that features
two Cortex M0s and eight PIO state machines that are good for
crunching lots of data. It has 264k RAM and a built in UF2
bootloader too.
Datasheet: https://pico.raspberrypi.org/files/rp2040_datasheet.pdf
This library is a small and easy-to-use cryptographic library which is well
suited to embedded systems.
Signed-off-by: Damien George <damien@micropython.org>
uzlib isn't actually used in any firmwares, but is built into the
"unix" port used for testing.
The main benefit of the update is to fix problems encountered on
Windows, as the old ref of uzlib had filenames with embedded colons;
this has been fixed upstream.
uzlib seems to have been reabsed since the version that we took; this
doesn't really matter to us.
Background: the friendly/normal REPL is intended for human use whereas the
raw REPL is for computer use/automation. Raw REPL is used for things like
pyboard.py script_to_run.py. The normal REPL has built-in flow control
because it echos back the characters. That's not so with raw REPL and flow
control is just implemented by rate limiting the amount of data that goes
in. Currently it's fixed at 256 byte chunks every 10ms. This is sometimes
too fast for slow MCUs or systems with small stdin buffers. It's also too
slow for a lot of higher-end MCUs, ie it could be a lot faster.
This commit adds a new raw REPL mode which includes flow control: the
device will echo back a character after a certain number of bytes are sent
to the host, and the host can use this to regulate the data going out to
the device. The amount of characters is controlled by the device and sent
to the host before communication starts. This flow control allows getting
the maximum speed out of a serial link, regardless of the link or the
device at the other end.
Also, this new raw REPL mode parses and compiles the incoming data as it
comes in. It does this by creating a "stdin reader" object which is then
passed to the lexer. The lexer requests bytes from this "stdin reader"
which retrieves bytes from the host, and does flow control. What this
means is that no memory is used to store the script (in the existing raw
REPL mode the device needs a big buffer to read in the script before it can
pass it on to the lexer/parser/compiler). The only memory needed on the
device is enough to parse and compile.
Finally, it would be possible to extend this new raw REPL to allow bytecode
(.mpy files) to be sent as well as text mode scripts (but that's not done
in this commit).
Some results follow. The test was to send a large 33k script that contains
mostly comments and then prints out the heap, run via pyboard.py large.py.
On PYBD-SF6, prior to this PR:
$ ./pyboard.py large.py
stack: 524 out of 23552
GC: total: 392192, used: 34464, free: 357728
No. of 1-blocks: 12, 2-blocks: 2, max blk sz: 2075, max free sz: 22345
GC memory layout; from 2001a3f0:
00000: h=hhhh=======================================hhBShShh==h=======h
00400: =====hh=B........h==h===========================================
00800: ================================================================
00c00: ================================================================
01000: ================================================================
01400: ================================================================
01800: ================================================================
01c00: ================================================================
02000: ================================================================
02400: ================================================================
02800: ================================================================
02c00: ================================================================
03000: ================================================================
03400: ================================================================
03800: ================================================================
03c00: ================================================================
04000: ================================================================
04400: ================================================================
04800: ================================================================
04c00: ================================================================
05000: ================================================================
05400: ================================================================
05800: ================================================================
05c00: ================================================================
06000: ================================================================
06400: ================================================================
06800: ================================================================
06c00: ================================================================
07000: ================================================================
07400: ================================================================
07800: ================================================================
07c00: ================================================================
08000: ================================================================
08400: ===============================================.....h==.........
(349 lines all free)
(the big blob of used memory is the large script).
Same but with this PR:
$ ./pyboard.py large.py
stack: 524 out of 23552
GC: total: 392192, used: 1296, free: 390896
No. of 1-blocks: 12, 2-blocks: 3, max blk sz: 40, max free sz: 24420
GC memory layout; from 2001a3f0:
00000: h=hhhh=======================================hhBShShh==h=======h
00400: =====hh=h=B......h==.....h==....................................
(381 lines all free)
The only thing in RAM is the compiled script (and some other unrelated
items).
Time to download before this PR: 1438ms, data rate: 230,799 bits/sec.
Time to download with this PR: 119ms, data rate: 2,788,991 bits/sec.
So it's more than 10 times faster, and uses significantly less RAM.
Results are similar on other boards. On an stm32 board that connects via
UART only at 115200 baud, the data rate goes from 80kbit/sec to
113kbit/sec, so gets close to saturating the UART link without loss of
data.
The new raw REPL mode also supports a single ctrl-C to break out of this
flow-control mode, so that a ctrl-C can always get back to a known state.
It's also backwards compatible with the original raw REPL mode, which is
still supported with the same sequence of commands. The new raw REPL
mode is activated by ctrl-E, which gives an error on devices that do not
support the new mode.
Signed-off-by: Damien George <damien@micropython.org>
This brings in the following, and updates us to the 1.0.4 release tag:
Submodule lib/protomatter 2a1ba8fa4..5f07ec618:
> Bumping version for release
> Merge pull request #21 from makermelissa/master
> Merge pull request #20 from makermelissa/master
> Merge pull request #18 from jepler/fix-cpy-3184
> Merge pull request #14 from hierophect/cpy-timer-allocator
We previously had the _changes_ of jepler/fix-cpy-3184 and
hierophect/cpy-timer-allocator but not their merge commits.
The only other changes in protomatter were one formatting change in the
core, plus several Arduino sketches. So this should make no practical
difference for CPy.
For time-based functions that work with absolute time there is the need for
an Epoch, to set the zero-point at which the absolute time starts counting.
Such functions include time.time() and filesystem stat return values. And
different ports may use a different Epoch.
To make it clearer what functions use the Epoch (whatever it may be), and
make the ports more consistent with their use of the Epoch, this commit
renames all Epoch related functions to include the word "epoch" in their
name (and remove references to "2000").
Along with this rename, the following things have changed:
- mp_hal_time_ns() is now specified to return the number of nanoseconds
since the Epoch, rather than since 1970 (but since this is an internal
function it doesn't change anything for the user).
- littlefs timestamps on the esp8266 have been fixed (they were previously
off by 30 years in nanoseconds).
Otherwise, there is no functional change made by this commit.
Signed-off-by: Damien George <damien@micropython.org>
mp_irq_init() is useful when the IRQ object is allocated by the caller.
The mp_irq_methods_t.init method is not used anywhere so has been removed.
Signed-off-by: Damien George <damien@micropython.org>
e.g., allocating a 192x32x6bpp matrix would be enough to trigger this
reliably on a Metro M4 Express using the "memory hogging" layout.
Allocating 64x32x6bpp could trigger it, but somewhat unreliably.
There are several things going on here:
* we make the failing call with interrupts off
* we were throwing an exception with interrupts off
* protomatter failed badly in _PM_free when it was partially-initialized
Incorporate the fix from protomatter, switch to a non-throwing malloc
variant, and ensure that interrupts get turned back on.
This decreases the quality of the MemoryError (it cannot report the size
of the failed allocation) but allows CircuitPython to survive, rather
than faulting.
In relatively unusual circumstances, such as entering `l = 17 ** 17777`
at the REPL, you could hit ctrl-c, but not get KeyboardInterrupt.
This can lead to a condition where the display would stop updating (#2689).
Currently when a utf8 character that is bigger than 1 byte is typed in
the repl, it isn't handled how it should be. If you try to move the
cursor in any direction the text gets messed up. This fixes that.
This array was of 32-bit values, but the entries were only ever
in the 0-255 range. Convert to uint8_t.
Testing performed: The result of the sum-of-sin was unchanged
>>> import math; sum(math.sin(2.**i) for i in range(21))
1.42069
This function computes the remainder of a value `x` modulo pi/2, to high
precision.
It does this by dividing the flotaing point values into several ranges
by magnitude, and applies successively slower but more accurate algorithms.
The last two steps, one covering values up to around 2^7 * pi/2
(called "medium size") and a final one covering all possible float values,
require big tables.
By eliminating the "medium size" case, a table and some code are removed
from the binary. This makes some cases take longer, but saves hundreds
of bytes. It does _NOT_ affect the result, only the speed.
```
[desktop python]
>>> sum(math.sin(2.**i) for i in range(21))
1.4206898748939305
[trinket m0, before change to ef_rem_pio2.c]
>>> sum(math.sin(2.**i) for i in range(21))
1.42069
[trinket m0, after change to ef_rem_pio2.c]
>>> sum(math.sin(2.**i) for i in range(21))
1.42069
```
Fixing 98e583430f, the semantics of strncpy
require that the remainder of dst be filled with null bytes.
Signed-off-by: Damien George <damien@micropython.org>
This code is imported from musl, to match existing code in libm_dbl.
The file is also added to the build in stm32/Makefile. It's not needed by
the core code but, similar to c5cc64175b,
allows round() to be used by user C modules or board extensions.
Changes in this new library version are:
- Update H7 HAL to v1.6.0.
- Update WB HAL to v1.6.0.
- Add patches to fix F4 ll_uart clock selection for UART9/UART10.
Signed-off-by: Damien George <damien@micropython.org>
The file `mbedtls_errors/mp_mbedtls_errors.c` can be used instead of
`mbedtls/library/error.c` to give shorter error strings, reducing the build
size of the error strings from about 12-16kB down to about 2-5kB.
So it can be unconditionally included in a port's build even if certain
configurations in that port do not use its features, to simplify the
Makefile.
Signed-off-by: Damien George <damien@micropython.org>
With only `sp_func_proto_paren = remove` set there are some cases where
uncrustify misses removing a space between the function name and the
opening '('. This sets all of the related options to `force` as well.
This update gives us access to a function we can run with interrupts
disabled to determine if the queue is empty.
Signed-off-by: Sean Cross <sean@xobs.io>
No functionality change is intended with this commit, it just consolidates
the separate implementations of GC helper code to the lib/utils/ directory
as a general set of helper functions useful for any port. This reduces
duplication of code, and makes it easier for future ports or embedders to
get the GC implementation correct.
Ports should now link against gchelper_native.c and either gchelper_m0.s or
gchelper_m3.s (currently only Cortex-M is supported but other architectures
can follow), or use the fallback gchelper_generic.c which will work on
x86/x64/ARM.
The gc_helper_get_sp function from gchelper_m3.s is not really GC related
and was only used by cc3200, so it has been moved to that port and renamed
to cortex_m3_get_sp.
This change is made for two reasons:
1. A 3rd-party library (eg berkeley-db-1.xx, axtls) may use the system
provided errno for certain errors, and yet MicroPython stream objects
that it calls will be using the internal mp_stream_errno. So if the
library returns an error it is not known whether the corresponding errno
code is stored in the system errno or mp_stream_errno. Using the system
errno in all cases (eg in the mp_stream_posix_XXX wrappers) fixes this
ambiguity.
2. For systems that have threading the system-provided errno should always
be used because the errno value is thread-local.
For systems that do not have an errno, the new lib/embed/__errno.c file is
provided.
Note: the uncrustify configuration is explicitly set to 'add' instead of
'force' in order not to alter the comments which use extra spaces after //
as a means of indenting text for clarity.
This is an extremely minimal port to the NXP i.MX RT, in the style of the
SAMD port It's largely based on the TinyUSB mimxrt implementation, using
the NXP SDK. It currently supports the Teensy 4.0 board with a REPL over
the USB-VCP interface.
This commit also adds the NXP SDK submodule (also from TinyUSB) to
lib/nxp_driver.
Note: if you already have the tinyusb submodule initialized recursively you
will need to run the following as the tinyusb sub-submodules have been
rearranged (upstream):
git submodule deinit lib/tinyusb
rm -rf .git/modules/lib/tinyusb
git submodule update --init lib/tinyusb
This is a more logical place to clear the KeyboardInterrupt traceback,
right before it is set as a pending exception. The clearing is also
optimised from a function call to a simple store of NULL.
This function is tightly coupled to the state and behaviour of the
scheduler, and is a core part of the runtime: to schedule a pending
exception. So move it there.
Pending exceptions would otherwise be handled later on where there may not
be an NLR handler in place.
A similar fix is also made to the unix port's REPL handler.
Fixes issues #4921 and #5488.
By simply reordering the enums for pyexec_mode_kind_t it eliminates a data
variable which costs ROM to initialise it. And the minimal build now has
nothing in the data section.
It seems the compiler is smart enough so that the generated code for
if-logic which tests these enum values is unchanged.
Introduces a way to place CircuitPython code and data into
tightly coupled memory (TCM) which is accessible by the CPU in a
single cycle. It also frees up room in the corresponding cache for
intermittent data. Loading from external flash is slow!
The data cache is also now enabled.
Adds support for the iMX RT 1021 chip. Adds three new boards:
* iMX RT 1020 EVK
* iMX RT 1060 EVK
* Teensy 4.0
Related to #2492, #2472 and #2477. Fixes#2475.
This commit adds backward-word, backward-kill-word, forward-word,
forward-kill-word sequences for the REPL, with bindings to Alt+F, Alt+B,
Alt+D and Alt+Backspace respectively. It is disabled by default and can be
enabled via MICROPY_REPL_EMACS_WORDS_MOVE.
Further enabling MICROPY_REPL_EMACS_EXTRA_WORDS_MOVE adds extra bindings
for these new sequences: Ctrl+Right, Ctrl+Left and Ctrl+W.
The features are enabled on unix micropython-coverage and micropython-dev.
During readline development, this function may receive bad `pos` values.
It's easier to understand the assert() failing error than to have a "stack
smashing detected" message.
For the 3 ports that already make use of this feature (stm32, nrf and
teensy) this doesn't make any difference, it just allows to disable it from
now on.
For other ports that use pyexec, this decreases code size because the debug
printing code is dead (it can't be enabled) but the compiler can't deduce
that, so code is still emitted.
This reverts commit f4ed2dfa94.
This lets tinytest work as it was originally designed. An alternate
solution for the reverted commit will be implemented in a future commit.
