microcontroller
– Pin references and cpu functionality¶
The microcontroller
module defines the pins from the perspective of the
microcontroller. See board
for board-specific pin mappings.
-
microcontroller.
cpu
:Processor¶ CPU information and control, such as
cpu.temperature
andcpu.frequency
(clock frequency). This object is an instance ofmicrocontroller.Processor
.
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microcontroller.
cpus
:Processor¶ CPU information and control, such as
cpus[0].temperature
andcpus[1].frequency
(clock frequency) on chips with more than 1 cpu. The index selects which cpu. This object is an instance ofmicrocontroller.Processor
.
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microcontroller.
delay_us
(delay: int) → None¶ Dedicated delay method used for very short delays. Do not do long delays because this stops all other functions from completing. Think of this as an empty
while
loop that runs for the specified(delay)
time. If you have other code or peripherals (e.g audio recording) that require specific timing or processing while you are waiting, explore a different avenue such as usingtime.sleep()
.
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microcontroller.
disable_interrupts
() → None¶ Disable all interrupts. Be very careful, this can stall everything.
-
microcontroller.
enable_interrupts
() → None¶ Enable the interrupts that were enabled at the last disable.
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microcontroller.
on_next_reset
(run_mode: RunMode) → None¶ Configure the run mode used the next time the microcontroller is reset but not powered down.
- Parameters
run_mode (RunMode) – The next run mode
-
microcontroller.
reset
() → None¶ Reset the microcontroller. After reset, the microcontroller will enter the run mode last set by
on_next_reset
.Warning
This may result in file system corruption when connected to a host computer. Be very careful when calling this! Make sure the device “Safely removed” on Windows or “ejected” on Mac OSX and Linux.
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microcontroller.
nvm
:Optional[nvm.ByteArray]¶ Available non-volatile memory. This object is the sole instance of
nvm.ByteArray
when available orNone
otherwise.- Type
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microcontroller.
watchdog
:Optional[watchdog.WatchDogTimer]¶ Available watchdog timer. This object is the sole instance of
watchdog.WatchDogTimer
when available orNone
otherwise.
-
class
microcontroller.
Pin
¶ Identifies an IO pin on the microcontroller.
Identifies an IO pin on the microcontroller. They are fixed by the hardware so they cannot be constructed on demand. Instead, use
board
ormicrocontroller.pin
to reference the desired pin.
-
class
microcontroller.
Processor
¶ Microcontroller CPU information and control
Usage:
import microcontroller print(microcontroller.cpu.frequency) print(microcontroller.cpu.temperature) Note that on chips with more than one cpu (such as the RP2040) microcontroller.cpu will return the value for CPU 0. To get values from other CPUs use microcontroller.cpus indexed by the number of the desired cpu. i.e. print(microcontroller.cpus[0].temperature) print(microcontroller.cpus[1].frequency)
You cannot create an instance of
microcontroller.Processor
. Usemicrocontroller.cpu
to access the sole instance available.-
frequency
:int¶ The CPU operating frequency in Hertz. (read-only)
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reset_reason
:ResetReason¶ The reason the microcontroller started up from reset state.
-
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class
microcontroller.
ResetReason
¶ The reason the microntroller was last reset
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POWER_ON
:object¶ The microntroller was started from power off.
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BROWNOUT
:object¶ The microntroller was reset due to too low a voltage.
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SOFTWARE
:object¶ The microntroller was reset from software.
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DEEP_SLEEP_ALARM
:object¶ The microntroller was reset for deep sleep and restarted by an alarm.
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RESET_PIN
:object¶ The microntroller was reset by a signal on its reset pin. The pin might be connected to a reset button.
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WATCHDOG
:object¶ The microcontroller was reset by its watchdog timer.
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UNKNOWN
:object¶ The microntroller restarted for an unknown reason.
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class
microcontroller.
RunMode
¶ run state of the microcontroller
Enum-like class to define the run mode of the microcontroller and CircuitPython.
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NORMAL
:RunMode¶ Run CircuitPython as normal.
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SAFE_MODE
:RunMode¶ Run CircuitPython in safe mode. User code will not be run and the file system will be writeable over USB.
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BOOTLOADER
:RunMode¶ Run the bootloader.
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