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6 Commits

Author SHA1 Message Date
Scott Shawcroft d2860b58b0
Check background pending before sleep 
There is a race between when we run background tasks and when we
sleep. If an interrupt happens between the two, then we may delay
executing the background task. On some ports we checked this for
TinyUSB already. On iMX RT, we didn't which caused USB issues.
This PR makes it more generic for all background tasks including
USB.

Fixes #5086 and maybe others.
 2021-08-19 12:18:13 -07:00
Scott Shawcroft 09bc415751
Unify iMX flash config and add Metro M7 1011 
This unifies the flash config to the settings used by the Boot ROM.
This makes the config unique per board which allows for changing
quad enable and status bit differences per flash device. It also
allows for timing differences due to the board layout.

This change also tweaks linker layout to leave more ram space for
the CircuitPython heap.
 2020-10-07 15:23:47 -07:00
Jeff Epler 7eff89e9f9 linker scripts: Re-align at ":" 
With "git show -b" you can verify that this is a whitespace only change
because the diff will be empty.
 2020-04-27 12:47:52 -05:00
Jeff Epler 808b456927 mimxrt10xx: Use FLASH_FIRMWARE instead of FLASH_TEXT in linker scripts 
for compatibility with the build_memory_info script

This change was scripted:
    git grep -l FLASH_TEXT | xargs sed -i s/FLASH_TEXT/FLASH_FIRMWARE/
 2020-04-27 08:07:47 -05:00
Scott Shawcroft 9d5742ebd1
Fix start on power up by providing Reset_Handler ourselves. 
On power up the FlexRAM banks are in an unknown config so we can't
rely on the stack until after we configure FlexRAM.
 2020-01-18 11:54:01 -08:00
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