Commit Graph

15 Commits

Author SHA1 Message Date
robert-hh 6754213a9d mimxrt/modmachine: Implement soft_reset() and unique_id() functions. 2021-10-25 23:53:48 +11:00
robert-hh c2e4759cfa mimxrt/modmachine: Implement machine.WDT() and machine.reset_cause().
The API follows that of rp2, stm32, esp32, and the docs.

    wdt=machine.WDT(0, timeout)

        Timeout is given in ms. The valid range is 500 to 128000 (128
        seconds) with 500 ms granularity. Values outside of that range will
        be silently aligned.

    wdt.feed()

        Resets the watchdog timer (feeding).

    wdt.timeout_ms(value)

        Sets a new timeout and feeds the watchdog.

        This is a new, preliminary method which is not yet documented.

    reset_cause = machine.reset_cause()

        Values returned:

        1  Power On reset
        3  Watchdog reset
        5  Software reset: state after calling machine.reset()

More elaborate API functions are supported by the MCU, like an interrupt
called a certain time after feeding.  But for port cosistency that is not
implemented.
2021-10-25 15:43:56 +11:00
robert-hh 61b7c098b9 mimxrt/machine_bitstream: Add bitstream function to machine module.
Following the code example for ESP32 of Jim Mussard.

As a side effect:
- mp_hal_ticks_cpu() was implemented,
- mp_hal_get_cpu_freq() and mp_hal_ticks_cpu_init() were added and used.
- mp_hal_pin_high() and mp_hal_pin_low() were changed for symmetry
2021-09-10 13:32:53 +10:00
Philipp Ebensberger 87f97e490c mimxrt/sdcard: Implement SDCard driver.
- Configures `PLL2->PFD0` with **198MHz** as base clock of
	`USDHCx` peripheral.
- Adds guards for SDCard related files via `MICROPY_PY_MACHINE_SDCARD`
- Adds creation of pin defines for SDCard to make-pins.py
- Adds new configuration option for SDCard peripheral pinout
        to mpconfigport.h
- Adds interrupt handling support instead of polling
- Adds support for `ADMA2` powered data transfer
- Configures SDCard to run in HS (high-speed mode) with **50MHz** only!

SDCard support is optional and requires `USDHC` peripheral.
Thus this driver is not available on `MIMXRT1010_EVK`.
SDCard support is enabled by setting `MICROPY_PY_MACHINE_SDCARD = 1`
in mpconfigboard.mk.

Signed-off-by: Philipp Ebensberger
2021-09-07 20:45:33 +02:00
robert-hh 98c5703027 mimxrt/machine_i2c: Add hardware-based machine.I2C to machine module.
It uses non-blocking transfer of data.  Advantage over SoftI2C:
- Higher data rate up to ~3 MHZ.
- Full protocol support.
2021-07-15 00:36:31 +10:00
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 f45412793e mimxrt/machine_spi: Add the SPI class to the machine module.
This class supports SPI bus controller mode, with blocking transfers.

SPI device numbers start at 0, to comply with the pinout of the Teensy
boards.  With the configured clock frequency the fastest baud rate is
33MHz.  For messages longer 16 bytes DMA is used.  The class uses the
existing framework with extmod/machine_spi.c.

Extended driver options:

- drive=n with n being between 1 and 6 or PIN.POWER_1 to PIN.POWER_6.
  Since the pins used by the SPI are fixed, no Pin settings can be made.
  Thus the drive option is added allowing to control ringing and crosstalk
  on the connection.

- gap_ns=nnnnn is the time between sent data items in a frame given in ns.
  Default is 2 clock cycles.
2021-06-26 22:14:47 +10:00
robert-hh 689476c576 mimxrt/machine_uart: Add the UART class to the machine module.
The implementation uses the LPUARTx devices.  Up to 8 UARTs can be used,
given that the pins are accessible.  E.g. 8 on Teensy 4.1, 5 on
MIMXRT1020_EVK.

For Tennsy 4.0 and 4.1 the UART numbers are as printed on the pinout 1..N.
The MIMXRT10xx-EVK boards have only one UART named, which gets the number
1.  All other UART are assigned to different Pins:

MIMXRT1010-EVK:
    D0/D1   UART 1
    D6/D7   UART 2
    A0/D4   UART 3

MIMXRT1020-EVK:
    D0/D1   UART 1
    D6/D9   UART 2
    D10/D12 UART 3
    D14/D15 UART 4
    A0/A1   UART 5

MIMXRT1050-EVK, MIMXRT1060-EVK, MIMXRT1064-EVK:
    D0/D1   UART 1
    D7/D6   UART 2
    D8/D9   UART 3
    A1/A0   UART 4
2021-06-16 01:21:15 +10:00
Philipp Ebensberger b8c65b174f mimxrt/machine_adc: Add the ADC class to the machine module.
This adds the machine.ADC class with the read_u16() method.  make-pins.py
and supporting files are updated to generate ADC information.
2021-06-04 00:51:58 +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 2f365d234e mimxrt/machine_rtc: Add the RTC class to the machine module.
Initial version, using the LP RTC clock.  It provides setting the date and
time with rtc.init() or rtc.datetime(), and reading the date and time with
rtc.datetime() or rtc.now().  The method weekday() reports the weekday of
the current date.  It starts with 0 for Monday.

The tuple order for datetime() and now() matches the CPython sequence:
(year, month, day, hour, minute, second, microsecond, TZ).  TZ is ignored
and reported as None.  Microsecond is provided at a best effort.

If a battery is not supplied, the default boot date/time is 1970/1/1 0:0:0.
With a battery, the clock continues to run even when the board is not
powered.  The clock is quite precise.  If not, using rtc.calibration() may
help.
2021-06-03 15:24:04 +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
Philipp Ebensberger ff5d39529c mimxrt: Implement machine.Pin class.
- modified pin type from pin_obj_t to machine_pin_obj_t
- created machine_pin.c
- implemented basic version of make-pins.py to genertate pins.c/.h files
  automatically; the only alternate function currently supported is GPIO
- added af.csv files for all supported MCUs
- replaced pins.c/pins.h files with pin.csv for all boards
- implemented on/off/high/low/value/init methods
- Implemented IN/OUT/OPEN_DRAIN modes
- modified LDFLAGS for DEBUG build to get usefull .elf file for debugging

Signed-off-by: Philipp Ebensberger
2021-05-26 00:12:42 +10:00
Philipp Ebensberger 02cc4462b7 mimxrt: Add initial impl of machine.LED class, and basic pin support.
This commit implements an LED class with rudimentary parts of a pin C API
to support it.  The LED class does not yet support setting an intensity.

This LED class is put in the machine module for the time being, until a
better place is found.

One LED is supported on TEENSY40 and MIMXRT1010_EVK boards.
2020-06-05 11:47:48 +10:00
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