This commit makes the following changes:
- Replace 256-byte reverse-bits-in-byte lookup table with computation.
- Replace length and distance code lookup tables with computation.
- Remove comp_disabled check (it's unused).
- Make the dest_write_cb take the data pointer directly, rather than the
Outbuf.
Saves 500 bytes on PYBV11.
Signed-off-by: Jim Mussared <jim.mussared@gmail.com>
The compression algorithm implemented in this commit uses much less memory
compared to the standard way of implementing it using a hash table and
large look-back window. In particular the algorithm here doesn't allocate
hash table to store indices into the history of the previously seen text.
Instead it simply does a brute-force-search of the history text to find a
match for the compressor. This is slower (linear search vs hash table
lookup) but with a small enough history (eg 512 bytes) it's not that slow.
And a small history does not impact the compression too much.
To give some more concrete numbers comparing memory use between the
approaches:
- Standard approach: inplace compression, all text to compress must be in
RAM (or at least memory addressable), and then an additional 16k bytes
RAM of hash table pointers, pointing into the text
- The approach in this commit: streaming compression, only a limited amount
of previous text must be in RAM (user selectable, defaults to 512 bytes).
To compress, say, 1k of data, the standard approach requires all that data
to be in RAM, plus an additional 16k of RAM for the hash table pointers.
With this commit, you only need the 1k of data in RAM. Or if it's
streaming from a file (or elsewhere), you could get away with only 256
bytes of RAM for the sliding history and still get very decent compression.
In summary: because compression takes such a large amount of RAM (in the
standard algorithm) and it's not really suitable for microcontrollers, the
approach taken in this commit is to minimise RAM usage as much as possible,
and still have acceptable performance (speed and compression ratio).
Signed-off-by: Damien George <damien@micropython.org>
This allows updating mp_mbedtls_errors.c for the other mbedtls based ports
based on mbedTLS v2.28.1. This esp32-specific file will not be required
after updating IDF support to >= v4.4.1.
Signed-off-by: Carlos Gil <carlosgilglez@gmail.com>
This should have been updated as part of commit
7d73b9ff99, when mbedtls was changed to the
LTS branch v2.16.
Signed-off-by: Damien George <damien@micropython.org>
This brings in support to publish packages to PyPI, adds missing metadata
and fixes aioble descriptor flags.
Signed-off-by: Damien George <damien@micropython.org>
This brings in the following new modules: hs3003, bmi270, bmm150, cbor2
and senml. It also refactors lsm6dsox and lsm9ds1.
Signed-off-by: Damien George <damien@micropython.org>
Changes since the previous version:
- add an API to get the BSSID
- support auto channel selection when using BSSID for join
- improve performance for the Murata 1DX module and SDIO
- return EINVAL for invalid auth type
- add support for Bluetooth over SPI
- convert 4343WA1-7.45.98.50.combined to C header files
Changes since the previous version:
- remove mDNS
- implement lwIP IGMP MAC filter callback
- implement IPv6 support
- allow building with IGMP disabled
- fix handshake meggase WAIT_G1 event value
- increase EAPOL timeout from 2500ms to 500ms
- add function to get RSSI
- fix handling of open security networks
- remove support for automatically setting auth type
Signed-off-by: Damien George <damien@micropython.org>
This update includes a few bug fixes for BLE, support for LE audio, updates
to classic BT support, cmake support, and other things.
Signed-off-by: Damien George <damien@micropython.org>
This brings in mip-cmdline, espflash, use of machine.dht_readinto, and
other improvements to existing libraries.
Signed-off-by: Damien George <damien@micropython.org>
Changes in this new library version are:
- Add L1 HAL at v1.10.3.
- H7_HAL/rcc_ex: Add SPI45 to HAL_RCCEx_GetPeriphCLKFreq.
- L4_HAL/gpio_ex: Add #define for GPIO_AF14_TIM2 on L4P5/L4Q5.
- F4_HAL/i2c: Fix I2C frequency calculation macros.
- L1_HAL/utils: Fix compile error when USE_HAL_DRIVER is defined.
There don't seem to be many changes going from v2.1.2 to v2.1.3 of lwIP.
Mostly they are:
- IPv6 fixes and improvements
- changes to apps and other code that MicroPython doesn't use
- comments and tests
- minor bug fixes
In particular there doesn't look to be any change to the API of any
function used by MicroPython.
Network multi tests pass on PYBD_SF2 and PYBD_SF6. PYBD_SF2, PYBD_SF6 and
PICO_W have unchanged iperf3 performance. Similar results for networking
on the mimxrt port.
Signed-off-by: Damien George <damien@micropython.org>
Several boards now depend on libraries from micropython-lib. Rather than
expecting micropython-lib to be available as a sibling of the micropython
repo, instead make it a submodule.
Signed-off-by: Jim Mussared <jim.mussared@gmail.com>
Changes in this new library version are:
- Update L4 HAL to v1.17.0.
- Add G4 HAL at v1.3.0.
- Add WL HAL at v1.1.0.
- Fix F4 UART and DMA data loss with RX hardware flow control.
- Optimise USB to pass config struct by reference.
- Fix bug in F4 MMC HAL_MMC_Erase function.
- Fix bug setting MMC relative address in F4 and F7 HAL.
Signed-off-by: Damien George <damien@micropython.org>
