Commit Graph

14 Commits

Author SHA1 Message Date
robert-hh
cbc9a591a4 mimxrt/modmachine: Add a few minor methods to the machine module.
Mostly for compatibility reasons:
- idle()
- disable_irq()
- enable_irq()
- time_pulse_us()
2021-06-26 22:27:02 +10:00
robert-hh
a262faa227 mimxrt/moduos: Seed the PRNG on boot using the TRNG. 2021-06-26 22:27:02 +10:00
robert-hh
7417c6ac91 mimxrt/machine_pin: Implement pin.irq() functionality. 2021-06-16 01:42:10 +10:00
robert-hh
bbdc98f72e mimxrt: Enable many Python and some extmod features.
Besides Python features this includes the extmod modules which make use of
the Pin module, especially machine.softSPI, machine.SoftI2C and onewire.
2021-06-04 00:38:18 +10:00
robert-hh
5226d6e1ee mimxrt: Remove __WFE() from MICROPY_EVENT_POLL_HOOK.
The device is unreliable with the WFE included.  This needs further
investigation.
2021-06-03 12:21:36 +10:00
robert-hh
4c407c790f mimxrt: Add the Timer class to the machine module.
It supports three hardware timer channels based on the PIT timers of the
MIMXRT MCU.  The timer id's are 0, 1 and 2.  On soft reboot all active
timers will be stopped via finalisers.
2021-06-02 00:33:13 +10:00
robert-hh
dfd4324eb1 mimxrt: Add flash storage support with VFS and littlefs filesystem.
This commit adds full support for a filesystem on all boards, with a block
device object mimxrt.Flash() and uos.VfsLfs2 enabled.

Main changes are:
- Refactoring of linker scripts to accomodate reserved area for VFS.  VFS
  will take up most of the available flash. 1M is reserved for code.  9K is
  reserved for flash configuration, interrupts, etc.
- Addition of _boot.py with filesystem init code, called from main.c.
- Definition of the mimxrt module with a Flash class in modmimxrt.[ch].
- Implementation of a flash driver class in mimxrt_flash.c.  All flashing
  related functions are stored in ITCM RAM.
- Addition of the uos module with filesystem functions.
- Implementation of uos.urandom() for the sake of completeness of the uos
  module.

It uses sample code from CircuitPython supplied under MIT license, which
uses the NXP SDK example code.

Done in collaboration with Philipp Ebensberger aka @alphaFred who
contributed the essential part to enable writing to flash while code is
executing, among other things.
2021-06-01 23:42:57 +10:00
robert-hh
c303b15f10 mimxrt: Enable frozen modules. 2021-06-01 22:57:09 +10:00
robert-hh
fdaf2b80d9 mimxrt: Add custom help text and enable help("modules"). 2021-06-01 22:52:44 +10:00
Philipp Ebensberger
c326d9a67b mimxrt: Enable built-in help. 2021-05-26 00:12:45 +10:00
Damien George
d0e014aa41 mimxrt: Enable CPYTHON_COMPAT, PY_ASYNC_AWAIT, PY_ATTRTUPLE options.
This change allows running the tests in tests/basics/ without any failures
(but some tests are still skipped).

Signed-off-by: Damien George <damien@micropython.org>
2021-04-14 12:55:53 +10:00
Damien George
f31c6b4840 mimxrt: Fix USB CDC handling so it works reliably.
On i.MX the SysTick IRQ cannot wake the CPU from a WFI so the CPU was
blocked on WFI waiting for USB data in mp_hal_stdin_rx_chr() even though it
had already arrived (because it may arrive just after calling the check
tud_cdc_available()).  This commit fixes this problem by using SEV/WFE to
indicate that there has been a USB event.

The mp_hal_stdout_tx_strn() function is also fixed so that it doesn't
overflow the USB buffers.

Signed-off-by: Damien George <damien@micropython.org>
2021-02-12 13:48:51 +11:00
Damien George
7c44354592 ports: Remove def of MP_PLAT_PRINT_STRN if it's the same as the default.
To simplify config, there's no need to specify MP_PLAT_PRINT_STRN if it's
the same as the default definition in py/mpconfig.h.

Signed-off-by: Damien George <damien@micropython.org>
2021-02-04 22:39:17 +11:00
Jim Mussared
f46782dde9 mimxrt: Add new, minimal port to NXP i.MX RT series CPUs.
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
2020-03-11 15:34:13 +11:00