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Scott Shawcroft 7d8dac9211
Refine iMX RT memory layout and add three boards 
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.
 		2020-01-17 17:36:08 -08:00
..
axtls@43a6e6bd3b WIP: complete manual inspection of all significant changes 2018-07-23 21:34:25 -04:00
berkeley-db-1.xx@35aaec4418 berkeley-db-1.xx: Update, allow to override MINCACHE, DEFPSIZE. 2017-09-10 13:51:51 +03:00
cmsis/inc lib/cmsis: upgrade CMSIS-CORE to V4.30 2016-09-30 16:19:03 +10:00
embed Two fixes and translate more strings. 2018-08-09 13:29:30 -07:00
libc Initial merge of micropython v1.9.2 into circuitpython 2.0.0 (in development) master. 2017-08-25 22:17:07 -04:00
libffi@e9de7e35f2 lib/libffi: Add libffi as a submodule. 2015-10-17 15:52:35 +03:00
libm merge from 2.2.0 + fix up board defs 2018-01-02 21:25:41 -05:00
libm_dbl Fix a couple variable shadowing varnings. 2019-02-07 20:10:43 +01:00
memzip lib/memzip: Make lexer constructor raise exception when file not found. 2017-03-14 11:52:05 +11:00
mp-readline merge finished 2018-07-28 13:29:47 -04:00
mp3@c3c664bf4d mp3: update to upstream release 1.1.1 2019-12-19 08:13:00 -06:00
netutils Fix esp and samd 2018-08-16 17:41:35 -07:00
nrfutil@9e7dfb28a5 update nrfutil to 0.5.2d with singlebank option 2018-05-17 15:20:07 +07:00
oofatfs nRF: disk_read must be 4-byte aligned 2019-12-10 14:03:06 -06:00
timeutils Fix os.stat() to use 1970 epoch 2018-08-25 20:43:02 +02:00
tinytest lib/tinytest: Clean up test reporting in the presence of stdout output. 2017-12-15 19:41:08 +02:00
tinyusb@1f95f439e1 Refine iMX RT memory layout and add three boards 2020-01-17 17:36:08 -08:00
upytesthelper lib/upytesthelper: MicroPython test helper layer on top of tinytest. 2017-12-13 09:07:51 +02:00
utils protocols: Allow them to be (optionally) type-safe 2019-12-04 09:29:57 -06:00
uzlib@f966da0fab uzlib: Upgrade to uzlib v2.9 release 2018-09-09 20:22:25 -05:00
README.md lib: Add basic README. 2014-09-18 00:13:03 +01:00

README.md

This directory contains standard, low-level C libraries with emphasis on being independent and efficient. They can be used by any port.