This is useful in situations where the ThreadSafeFlag is reused and needs
to be cleared of any previous, unwanted event.
For example, clear the flag at the start of an operation, trigger the
operation (eg an I2C write), then (a)wait for an external event to set the
flag (eg a pin IRQ). Further events may trigger the flag again but these
are unwanted and should be cleared before the next cycle starts.
Document how to connect the Timer block BRK_IN to a physical Pin alternate
function.
Add an example of PWM Motor drive using complementary outputs with dead
time and break input to kill the PWM and generate a callback.
Signed-off-by: Chris Mason <c.mason@inchipdesign.com.au>
Some Pin alternate functions are inputs, for example, timer capture and
break inputs. In Pyb.Pin the only way to set alt mode is with Pin.AF_PP or
Pin.AF_OD. It is not intuitive to use an output mode to configure an
input. Pin.ALT is used in the machine.Pin class and works in pyb.Pin.
The examples are changed to use Pin.ALT because TIM2_CH3 can be a capture
input or pulse output.
Signed-off-by: Chris Mason <c.mason@inchipdesign.com.au>
Remove out of context callback paragraph, it was part of the wipy docs.
And move the paragraph about PULL_UP/PULL_DOWN resistor values to within
the init() method docs. Also fix pull-pull -> push-pull.
Signed-off-by: Chris Mason <c.mason@inchipdesign.com.au>
Add cert_reqs and cadata keyword-args to ssl.wrap_socket() and
ssl.CERT_NONE, ssl.CERT_OPTIONAL, ssl.CERT_REQUIRED constants to allow
certificate validation.
CPython doesn't accept cadata in ssl.wrap_socket(), but it does in
SSLContext.load_verify_locations(), so we use this name to at least match
the same name in load_verify_locations().
Add docs for these new arguments, as well as docs for the existing
server_hostname argument which is important for certificate validation.
Tests are added as well.
Signed-off-by: Carlos Gil <carlosgilglez@gmail.com>
Add esp32.wake_on_ulp() to give access to esp_sleep_enable_ulp_wakeup(),
which is needed to allow the ULP co-processor to wake the main CPU from
deep sleep.
This changes the btree implementation to use the buffer protocol for
reading key/values in all methods. `str` and `bytes` objects are not the
only bytes-like objects that could be used.
Documentation and tests are also updated.
Addresses issue #8748.
Signed-off-by: David Lechner <david@pybricks.com>
This contains a string useful for identifying the underlying machine. This
string is kept consistent with the second part of the REPL banner via the
new config option MICROPY_BANNER_MACHINE.
This makes os.uname() more or less redundant, as all the information in
os.uname() is now available in the sys module.
Signed-off-by: Damien George <damien@micropython.org>
This codec is assembled for the MIMXRT1xxx_DEV boards and available for
WM8960 breakout boards as well.
The driver itself has been tested as working with the MIMXRT boards and a
Sparkfun WM6890 breakout board. It implements the initialization, basic
methods and some enhanced methods like 3D, ALC, soft-mute and deemphasis.
This commit adds support for machine.I2S on the mimxrt port. The I2S API
is consistent with the existing stm32, esp32, and rp2 implementations.
I2S features:
- controller transmit and controller receive
- 16-bit and 32-bit sample sizes
- mono and stereo formats
- sampling frequencies from 8kHz to 48kHz
- 3 modes of operation:
- blocking
- non-blocking with callback
- uasyncio
- configurable internal buffer
- optional MCK
Tested with the following development boards:
- MIMXRT1010_EVK, MIMXRT1015_EVK, MIMXRT1020_EVK, MIMXRT1050_EVK
- Teensy 4.0, Teensy 4.1
- Olimex RT1010
- Seeed ARCH MIX
Tested with the following I2S hardware peripherals:
- UDA1334
- GY-SPH0645LM4H
- WM8960 codec on board the MIMXRT boards and separate breakout board
- INMP441
- PCM5102
- SGTL5000 on the Teensy audio shield
Signed-off-by: Mike Teachman <mike.teachman@gmail.com>
Add a new function to control whether held pins will retain their function
through deep-sleep.
Also document this function and explain how to use this in quickref to
retain pin configuration during deep-sleep.
When a task waits on a ThreadSafeFlag (and the wait method returns), the
flag is immediately reset. This was not clear in the documentation, which
appeared to copy the description of the wait method from the Event class.
Signed-off-by: Lars Kellogg-Stedman <lars@oddbit.com>
The keyword "af" has been deprecated for some time and "alt" should be used
instead (but "af" still works).
Signed-off-by: Damien George <damien@micropython.org>
This allows encoding things (eg a Basic-Auth header for a request) without
slicing the \n from the string, which allocates additional memory.
Co-authored-by: David Lechner <david@lechnology.com>
The new ADC methods are: init(), read_uv() and block().
The new ADCBlock class has methods: init() and connect().
See related discussions in #3943, #4213.
Signed-off-by: Damien George <damien@micropython.org>
Ned Konz