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Add support for the boards:
- SparkFun SAMD21 Dev Breakout
- SparkFun RedBoard Turbo
Both boards are SAMD21 based and actively sold by SparkFun.
Signed-off-by: robert-hh <robert@hammelrath.com>
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This is a follow-up to 1e92bdd206f6f87ba65ea05c5b2623fca0b926cd correcting
more of the instances where "Sparkfun" should be "SparkFun".
Signed-off-by: Damien George <damien@micropython.org>
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Changes are:
- Add the RX/TX pins to the table. In most cases these are the D0/D1 pins.
- Document the ability for the instantiation of the default devices without
submitting ID or pins.
- Improve the example script creating the pin list to show multiple name
assigments to the same pin.
- Fix errors in the pinout document.
Signed-off-by: robert-hh <robert@hammelrath.com>
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The table shows the devices available at the pin and the respective package
letter.
Signed-off-by: robert-hh <robert@hammelrath.com>
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Only pins accessible at the board are shown.
Signed-off-by: robert-hh <robert@hammelrath.com>
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The following ports used 65536 as the upper value (100% duty cycle) and are
changed in this commit to use 65535: esp8266, mimxrt, nrf, samd.
Tested that output is high at `duty_u16(65535)` and low at `duty_u16(0)`.
Also verified that at `duty_u16(32768)` the high and low pulse have the
same length.
Partially reverts #10850, commits 9c7ad68165bcd224c94ca6d8f172362cf8000d99
and 2ac643c15bec8c88ece0e944ce58f36d02dfd2dd.
Signed-off-by: robert-hh <robert@hammelrath.com>
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Do NOT use `mp_hal_delay_us()` for short delays. This was initially done
to make short delays precise, but it does not allow for scheduling. Leave
using `mp_hal_delay_us()` to user code if needed.
Signed-off-by: robert-hh <robert@hammelrath.com>
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Prune trailing whitespace across the whole project (almost), done
automatically with:
grep -IUrl --color "[[:blank:]]$" --exclude-dir=.git --exclude=*.exp |\
xargs sed -i 's/[[:space:]]*$//'
Exceptions:
- Skip third-party code in lib/ and drivers/cc3100/
- Skip generated code in bluetooth_init_cc2564C_1.5.c
- Preserve command output whitespace in docs, eg:
docs/esp8266/tutorial/repl.rst
Signed-off-by: Phil Howard <phil@gadgetoid.com>
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Fixes a wrong assignment for Sparkfun SAMD51 Thing Plus, and updates the
sample script for printing the pin info table.
Signed-off-by: robert-hh <robert@hammelrath.com>
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And the "Pin", "GPIO" and "Name" key explanations.
Signed-off-by: robert-hh <robert@hammelrath.com>
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For SAMD21 devices, the board flash signals must be named in pins.csv as
FLASH_MOSI, FLASH_MISO, FLASH_SCK, FLASH_CS for creating the SPI object.
And rename the QSPI pins to QSPI_xxxx instead of FLASH_xxx.
Signed-off-by: robert-hh <robert@hammelrath.com>
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Signed-off-by: robert-hh <robert@hammelrath.com>
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By specifying rts=pin(x) and/or cts=Pin(x) in the constructor. The pad
numbers for the UART pins are fix in this case: TX must be at pad 0, RX at
pad 1, RTS at pad 2 and CTS at pad 3.
repr(uart) shows the pin names for rts and cts, if set. In case of a RX
overflow, the rx interrupt will be disabled instead of just discarding the
data. That allows RTS to act.
If RTS is inactive, still 2 bytes can be buffered in the FIFO.
Signed-off-by: robert-hh <robert@hammelrath.com>
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This keeps up with the changed Pin naming scheme.
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This adds the freq and duty_u16 keyword settings to the constructor, and
sometimes other details in the PWM section.
For mimxrt a clarification regarding the PWM invert argument was added, and
for rp2 a few words were spent on PWM output pairs of a channel/slice.
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The PWM.init() method has been added. Calling init() without arguments
restarts a PWM channel stopped with deinit(). Otherwise single parameters
except for "device=n" can be changed again. The device can only be
specified once, either in the constructor or the first init() call.
Also simplify get_pwm_config() and get_adc_config(), and shrink the PWM
object.
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By using the phase jitter between the DFLL48M clock and the FDPLL96M clock.
Even if both use the same reference source, they have a different jitter.
SysTick is driven by FDPLL96M, the us counter by DFLL48M. As a random
source, the us counter is read out on every SysTick and the value is used
to accumulate a simple multiply, add and xor register. According to tests
it creates about 30 bit random bit-flips per second. That mechanism will
pass quite a few RNG tests, has a suitable frequency distribution and
serves better than just the time after boot to seed the PRNG.
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ADC: The argument of vref=num is an integer. Values for num are:
SAMD21:
0 INT1V 1.0V voltage reference
1 INTVCC0 1/1.48 Analog voltage supply
2 INTVCC1 1/2 Analog voltage supply (only for VDDANA > 2.0V)
3 VREFA External reference
4 VREFB External reference
SAMD51:
0 INTREF internal bandgap reference
1 INTVCC1 Analog voltage supply
2 INTVCC0 1/2 Analog voltage supply (only for VDDANA > 2.0v)
3 AREFA External reference A
4 AREFB External reference B
5 AREFC External reference C (ADC1 only)
DAC: The argument of vref=num is an integer. Suitable values:
SAMD21:
0 INT1V Internal voltage reference
1 VDDANA Analog voltage supply
2 VREFA External reference
SAMD51:
0 INTREF Internal bandgap reference
1 VDDANA Analog voltage supply
2 VREFAU Unbuffered external voltage reference (not buffered in DAC)
4 VREFAB Buffered external voltage reference (buffered in DAC).
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It still used the 'old' pin numbers.
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Includes a general overview, a quickref, pinout tables, and the beginnings
of a tutorial.
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